Researcher Profile and Settings

Affiliation

• Faculty of Fisheries Sciences　Marine Bioresource and Environmental Science　Marine Bioresource Science

Job Title

• Associate Professor

J-Global ID

• 201201054204422091

Research Interests

• feeding habits   growth and survival   Early life history   Fisheries bio-resources   

Research Areas

• Life sciences / Aquaculture / Fisheries bio-resources

Educational Organization

•  Bachelor's degree program　School of Fisheries Sciences
•  Master's degree program　Graduate School of Fisheries Sciences
•  Doctoral (PhD) degree program　Graduate School of Fisheries Sciences

Academic & Professional Experience

• 2018/05 - Today Hokkaido University Faculty of Fisheries Sciences
• 2012/09 - 2018/04 Hokkaido University School of Fisheries Sciences
• 2010/11 - 2012/08 Fisheries Research Agency
• 2009/03 - 2010/10 カキキン有限会社 生産・販売・研究職員
• 2006/10 - 2009/01 Japan International Cooperation Agency
• 2006/04 - 2006/09 カキキン有限会社 生産・販売・研究職員
• 2004/04 - 2006/03 Fisheries Research Agency

Education

• 2001/04 - 2004/03  北海道大学大学院
• 1999/04 - 2001/03  北海道大学大学院
• 1995/04 - 1999/03  Hokkaido University  School of Fisheries Sciences

Association Memberships

• JAPANESE SOCIETY OF FISHERIES OCEANOGRAPHY   JAPAN AQUACULTURE SOCIETY   THE JAPANESE SOCIETY OF FISHERIES SCIENCE   

Research Activities

Published Papers

• Effect of egg size on the growth rate and survival of wild walleye pollock Gadus chalcogrammus larvae

  Keitaro Kajiwara, Mitsuhiro Nakaya, Kota Suzuki, Yota Kano, Tetsuya Takatsu

  Fisheries Oceanography 31 (3) 238 - 254 1054-6006 2022/05
• Changes in morphology and specific gravity in larvae of Lophius litulon (Lophiiformes; Lophiidae) before and after emergence from egg veil

  Tomoya Ishikawa, Mitsuhiro Nakaya, Weifeng Gao, Tetsuya Takatsu, Kenji Odani, Ryo Suzuki, Kyosei Noro, Yuhei Takeya

  Environmental Biology of Fishes 105 (2) 303 - 312 0378-1909 2022/02
• Embryonic development and effect of water temperature on hatching of Lophius litulon

  Tomoya Ishikawa, Mitsuhiro Nakaya, Tetsuya Takatsu

  Environmental Biology of Fishes 105 (1) 77 - 86 0378-1909 2022/01
• Effects of water temperature on the embryonic period of Pacific rainbow smelt Osmerus dentex.

  T. Nam, M. Nakaya, T. Ishikawa, T. Takatsu

  Aquaculture Science 69 (3) 223 - 225 2021/10 [Refereed][Not invited]
  
• Age and growth of Pacific rainbow smelt Osmerus dentex estimated from scales and otoliths in Funka Bay and the Yamazaki River, Japan.

  T. Nam, M. Nakaya, T. Takatsu

  Aquaculture Science 69 (2) 153 - 161 2021/07 [Refereed][Not invited]
  
• Validation of otolith daily increment formation and growth analysis of yellow goosefish Lophius litulon.

  W. Gao, M. Nakaya, T. Ishikawa, T. Takatsu, Y. Takeya, R. Suzuki, K. Noro

  Fisheries Science 87 (4) 541 - 548 0919-9268 2021/06 [Refereed][Not invited]
  
• Note on color variations of inner surface of pectoral fins in Lepidotrigla microptera Günther, 1873 (Actinopterygii: Triglidae) from Mutsu Bay, Japan.

  N. Kawakami, T. Kawai, M. Nakaya

  The Thailand National History Museum Journal 15 (1) 51 - 58 2021/06 [Refereed][Not invited]
  
• Feeding habits of larval yellow goosefish Lophius litulon around the Shimokita Peninsula and in Funka Bay, Japan

  Weifeng Gao, Mitsuhiro Nakaya, Tetsuya Takatsu, Yuhei Takeya, Kyosei Noro

  Aquaculture Science 68 (3) 275 - 277 2020/09 [Refereed][Not invited]
  
• 津軽海峡周辺におけるキアンコウの初期生態

  高 偉峰, 中屋光裕, 髙津哲也, 竹谷裕平, 鈴木 亮, 野呂恭成

  84 (3) 228 - 229 2020/08 [Not refereed][Invited]
  
• ホッケの父母性効果について

  森田晶子, 横田高士, 中屋光裕, 横山貴洋

  水産海洋研究 84 (3) 225 - 225 2020/08 [Not refereed][Invited]
  
• ホッケ生活史初期の成長

  河村眞美, 中屋光裕, 髙津哲也, 巣山哲, 鈴木祐太郎, 高畠信一

  水産海洋研究 84 (3) 223 - 224 2020/08 [Not refereed][Invited]
  
• Close-up observations on the spawning behavior of a captive Japanese flying squid (Todarodes pacificus)

  J. Yamamoto, K. Adachi, J. Bower, H. Matsui, M. Nakaya, R. Ohtani, P. Puneeta, S. Suzuki, S. Tokioka, D. Vijai, T. Yanagimoto, H. Yoo

  Scientific Reports 2019 [Refereed][Not invited]
  
• Comparison of age and growth of the marbled flounder Pseudopleuronectes yokohamae (Günther, 1877) in the coastal waters of Japan.

  P. Hong, S. Katayama, M. Yamamoto, M. Ishii, T. Baba, M. Saeki, M. Suzuki, M. Nakaya

  Asian Fisheries Science 32 (2) 72 - 80 0116-6514 2019 [Refereed][Not invited]
   

  © Asian Fisheries Society. The marbled flounder, Pseudopleuronectes yokohamae (Günther, 1877), is one of the most economically important flatfish species in Japan. Research has been carried out on the age and growth of this species. However, there has been no comparison of growth rates of the fish from different locations. In this study, the age composition and growth trajectory of marbled flounder from different coastal waters in Japan were estimated and compared. Samples were collected from six locations, namely in the prefectures of Kagawa, Yamaguchi, Chiba, Niigata, Miyagi and Hokkaido. Age composition and growth trajectories were determined by analysing otoliths. The majority of specimens were found to be 2 to 3 years of age. Female marbled flounder were found to have a higher total length (TL) and growth rate than males. There were significant differences in growth curves for each of the sampling locations. There were also significant differences between males and females at each sampling location, with females attaining a higher theoretical maximum TL, longer lifespan and faster growth rate than males. The data from the current study can be used to help improve fish resource management.
• Annual and seasonal changes in the assemblage of planktonic copepods and appendicularians in Funka Bay before and after intrusion of Coastal Oyashio Water.

  H. Yamaoka, T. Takatsu, K. Suzuki, N. Kobayashi, A. Ooki, M. Nakaya

  Fisheries Science 85 (6) 1077 - 1087 2019 [Refereed][Not invited]
  
• Growth of the brittle star Ophiura sarsii sarsii in Funka Bay, Hokkaido, Japan.

  K. Orino, K. Ishigane, K. Suzuki, J. Izumiura, M. Nakaya, T. Takatsu

  Fisheries Science 85 (4) 705 - 716 2019 [Refereed][Not invited]
  
• A DNA marker to discriminate two types of freshwater shrimp Palaemon paucidens and the distribution of these two types in Japan

  CHOW SEINEN, NIGORIKAWA NAOKO, URAGAKI NAOKO, KAWAMURA AKIKO, ICHIKAWA TATSUYA, USHIODA KENTARO, HIGUCHI MASAHITO, TEGA TARO, KODAMA KOJI, ITOH MASAHIRO, ICHIMURA MASAKI, IMAI TADASHI, MATSUZAKI KOJI, HIRASAWA KEI, TOKURA KEITA, NAKAHATA KATSUMI, KODAMA SAKIE, HAKOYAMA HIROSHI, YADA TAKASHI, NIWA KENTARO, NAGAI SATOSHI, YANAGIMOTO TAKASHI, IKEDA MINORU, SAITO KAZUYOSHI, NAKAYA MITSUHIRO, MARUYAMA TOMOAKI, MAKI SOICHIRO, OONUKI TAKAKIYO, MUTO FUMITO, NOHARA KENJI, FURUSAWA CHIHARU, SHICHIRI HIROSHI

  NIPPON SUISAN GAKKAISHI 公益社団法人 日本水産学会 84 (4) 674 - 681 0021-5392 2019 [Refereed][Not invited]
   

  Among the palaemonid shrimp species of the genus Palaemon known from Japan, Palaemon paucidens is the only species inhabiting freshwater areas. Two genetically distinct types (designated by A and B) were found by allozyme electrophoresis analysis three decades ago. We developed a simple multiplex-PCR assay to discriminate the two types based on 18S rDNA sequences. A total of 422 individuals collected at 152 localities in Japan were analyzed by the multiplex-PCR assay. No heterozygote was observed, indicating that these two types have been reproductively isolated. Both types were distributed throughout Japan; type A was observed in ponds, lakes and rivers, while type B was observed only in rivers.

• ミトコンドリアDNAによって検討した噴火湾に生息するアカガレイ個体群の遺伝的多様性．

  山本祐樹, 池田実, 中屋光裕, 鈴木孝太, 髙津哲也

  魚類学会誌 65 (1) 75 - 80 2018/04 [Refereed][Not invited]
  
• Sexual dimorphism in the size of bulbous nasal tubes of yellow goosefish Lophius litulon oŠ Aomori Prefecture, northern Japan

  Yuhei Takeya, Tetsuya Takatsu, Tomoyuki Yamanaka, Yasutoki Shibata, Mitsuhiro Nakaya

  Nippon Suisan Gakkaishi (Japanese Edition) 84 (1) 130 - 132 1349-998X 2018 [Refereed][Not invited]
  
• Otolith microstructure of Arabesque greenling Pleurograrnmus azonus: A species with a long embryonic period

  Savitri Marannu, Mitsuhiro Nakaya, Tetsuya Takatsu, Shin-ichi Takabatake, Mikimasa Joh, Yutaro Suzuki

  FISHERIES RESEARCH 194 129 - 134 0165-7836 2017/10 [Refereed][Not invited]
   

  We investigated the relationship between morphological development in the embryonic stage and the formation of otolith microstructure in Arabesque greenling Pleurogranunus azonus, and then validated that the otolith increments were formed on a daily basis. Increments were more consistent to count and measure in sagittal otoliths from wild caught larvae compared to lapillar otoliths, and we suggest that sagittal otoliths as suitable for otolith microstructure analysis. This study clarified the formation time of three prominent increments on the sagittal otolith. First prominent increment (approx. 17 mm in otolith radius (OR)) was coincident with the time of eye pigmentation in the embryonic stage. Second (approx. 36 pm OR) was considered to be the hatch increment and the third (approx. 38 pm OR) was at the time of transition from endogenous to exogenous nutrition. The third prominent increment which was the clearest radius (termed below as the check) was used as the starting point for validating the daily increment formation in sagittal otolith, and also there was no significant difference in the check radius among reared (6, 8, and 10 degrees C) and wild caught larvae. The relationship between number of days after hatching and the number of increments formed after check was significant and the slope of the regression line was not different from 1, validating the assumption that growth increments are formed on a daily basis in sagittae of P. azonus. The check was formed on the otolith at the transition from endogenous to exogenous nutrition, and the number of days required prior to its formation varied with water temperature. For the species in which the check is formed at the nutritional transition from endogenous to exogenous feeding, the relationship between number of days to check formation and water temperature is essential to estimate the hatch date of wild caught individuals.
• The effect of temperature on the early development and starvation tolerance of yellow goosefish Lophius litulon.

  M. Nakaya, Y. Takeya, K. Noro, R. Suzuki, W. Gao, T. Takatsu

  Aquaculture Science 日本水産増殖学会 65 (3) 251 - 254 0371-4217 2017/09 [Refereed][Not invited]
  
• Relationship between temperature and embryonic period of Arabesque greenling Pleurogrammus azonus.

  M. Nakaya, S. Marannu, Y. Inagaki, K. Kajiwara, Y. Sato, K. Suzuki, T. Takatsu

  Aquaculture Science 日本水産増殖学会 65 (3) 247 - 250 0371-4217 2017/09 [Refereed][Not invited]
  
• Changes in the specific gravity of eggs, larvae, and juveniles of Hippoglosoides dubius, and the relationship between egg development and water temperature

  Kota Suzuki, Mitsuhiro Nakaya, Hae-Kyun Yoo, Taihei Matsuda, Tetsuya Takatsu

  NIPPON SUISAN GAKKAISHI 83 (4) 580 - 588 0021-5392 2017/07 [Refereed][Not invited]
   

  To assess transportation in the early life history stages in the flathead flounder Hippoglosoides dubius, we measured the specific gravities of the eggs at 9 degrees C and the larvae and juveniles at 9 degrees C and 12 degrees C using density gradient and density-bottle methods. We also examined the effect of temperature (1, 3, 6, 9, and 12 degrees C) on the duration between fertilization and yolk sac absorption. Eggs in glass beakers had lower specific gravities than the water densities experienced in one of the spawning grounds, Funka Bay. In contrast, the specific gravities were higher than the water densities in Funka Bay in yolk sac larvae, almost the same in early preflexion larvae, and increased with advancing development from the late preflexion larval to juvenile stages. The duration from fertilization to yolk sac period decreased with increasing water temperature. Thus, annual variation in the water temperature in the field combined with transport directions and speeds at various depths may affect the transportation of flounder eggs and larvae.
• Use of the illicium for age determination and verification of yellow goose fish Lophius litulon off Aomori Prefecture, northern Japan

  Yuhei Takeya, Tetsuya Takatsu, Tomoyuki Yamanaka, Yasutoki Shibata, Mitsuhiro Nakaya

  NIPPON SUISAN GAKKAISHI 83 (1) 9 - 17 0021-5392 2017 [Refereed][Not invited]
   

  Yellow goose fish Lophius litulon is an economically valuable fish species around Japan. The aim of the present study was to evaluate a suitable technique for age determination of yellow goose fish using the illicium. Specimens of yellow goose fish were collected by commercial boats and research vessels from the Sea of Japan, Tsugaru Strait and the Pacific Ocean off Aomori Prefecture from November 2013 to March 2016 using bottom gill, set and trawl nets. Each specimen was measured and sexed, and the illicium and 8th vertebra were removed in the laboratory. The epidermis of each illicium was removed after boiling, and the illicia were dried, whereas each of the 8th vertebra was boiled and sectioned. We found that the best ageing method was a count of opaque zones in the illicia. This was facilitated using the cross-sectioned illicia that had been etched with 1 mol/L HCl for 30 s, stained with methylene blue for 4 h and viewed under transmitted and incident light. Opaque zones form twice per year ( mainly during June and November. December) in the illicia. Age determination using opaque zones in the illicia was more accurate than that using opaque zones in the vertebral centra. Because the illicia of yellow goose fish are easy to collect and manipulate for age determination and the growth rate estimated using the illicia and tagging experiments is similar, this method of age determination may be useful for these fish in this region.
• Determination of the spawning history of Pacific saury Cololabis saira from rearing experiments: identification of post-spawning fish from histological observations of ovarian arterioles

  Satoshi Suyama, Akio Shimizu, Sayoko Isu, Hitomi Ozawa, Taizo Morioka, Mitsuhiro Nakaya, Toru Nakagawa, Naoto Murakami, Takashi Ichikawa, Yasuhiro Ueno

  FISHERIES SCIENCE 82 (3) 445 - 457 0919-9268 2016/05 [Refereed][Not invited]
   

  Rearing experiments under controlled temperature conditions were carried out to establish a methodology for estimating the spawning history of the Pacific saury Cololabis saira. The experiments involved histological examination of ovarian arterioles at various maturational stages. We found that pre-spawning immature fish lacked Victoria blue (VB)-positive arterioles in the ovaries, as did maturing fish, while post-spawning females had VB-positive arterioles. The latter were also observed after 6 months when most spawning activity had ceased. The results indicate that VB-positive ovarian arterioles are a characteristic feature of actively spawning Pacific saury and that females with VB-positive arterioles can be classified as post-spawning fish. Females without VB-positive arterioles can be regarded as "practically unspawned" fish, and this group may include some fish that have spawned a number of times, in addition to completely unspawned fish. The methodology has many practical uses such as in the estimation of maturation rates for stock management.
• Effects of n-3 highly unsaturated fatty acid content in Artemia on survival and development of laboratory-reared horsehair crab Erimacrus isenbeckii larvae

  Tadao Jinbo, Shigeki Dan, Mitsuhiro Nakaya, Masakazu Ashidate, Katsuyuki Hamasaki

  FISHERIES SCIENCE 79 (3) 459 - 467 0919-9268 2013/05 [Refereed][Not invited]
   

  The effect of varying levels of dietary n-3 highly unsaturated fatty acid (HUFA) content in Artemia sp. on survival, the number of days required to reach each larval stage, and the growth and morphogenesis of larvae of the horsehair crab Erimacrus isenbeckii were examined. Artemia enriched with materials of six types [condensed Nannochloropsis sp., ethyl oleate, two enrichment levels of eicosapentaenoic acid (EPA), and those of docosahexaenoic acid], and unenriched Artemia were fed to larvae. Newly hatched larvae were reared in groups of 50 individuals in two 2-l beakers until they reached the first crab stage. No significant difference was found in survival rate, growth, or morphogenesis of larvae, but fewer days tended to be required to reach the first crab stage in the group enriched with high EPA compared to the other groups. Results show that, although the amount of n-3 HUFA in unenriched Artemia might meet the demands of horsehair crab larvae for their survival, growth, and morphogenesis, Artemia should be enriched with high EPA to improve the rate of larval development.
• Interannual growth differences and growth-selective survival in larvae and juveniles of marbled sole Pseudopleuronectes yokohamae

  Mikimasa Joh, Mitsuhiro Nakaya, Naoto Yoshida, Tetsuya Takatsu

  MARINE ECOLOGY PROGRESS SERIES 494 267 - 279 0171-8630 2013 [Refereed][Not invited]
   

  Flatfishes drastically change their habitat, body form, and feeding during metamorphosis; thus, the early juvenile and larval stages are viewed as being critical for early survival. However, to the best of our knowledge, no studies have tested the growth-mortality hypothesis for both larval and juvenile stages of flatfishes. Therefore, we investigated the relationship between growth rate and environmental factors and tested the hypothesis for both larval and juvenile stages of marbled sole Pseudopleuronectes yokohamae in Hakodate Bay, Japan from 2001 to 2003. For both larval and juvenile stages, otolith growth correlated with water temperature. Eye-migrating larvae were defined as survivors of planktonic life (SVpelagic). Large juveniles captured in late June and July were defined as survivors of shrimp predation (SVjuvenile). To test the growth-mortality hypothesis, otolith growth was compared between the SV and the original population. During the pelagic larval stage, growth-selective survival was not detected in any of the 3 yr. During the early juvenile stage, fast-growing individuals survived selectively in 2002 but not in 2003. In 2002, population growth of juveniles was slow because water temperatures were low. Thus, juveniles in 2002 required time to exceed the size spectrum that is vulnerable to shrimp predation; consequently, the individuals that grew more rapidly were able to survive selectively. Our results show the importance of the early juvenile stage for the survival of flatfishes.
• Differences in body proportions between hatchery-reared- and wild pacific herring, Clupea pallasii (Actinopterygii: Clupeiformes: Clupeidae)

  Mitsuhiro Nakaya, Kyohei Fukunaga, Shigenori Suzuki

  Acta Ichthyologica et Piscatoria 43 (1) 75 - 77 0137-1592 2013 [Refereed][Not invited]
   

  The body proportions of 0-group Pacific herring, Clupea pallasii, were compared between hatcheryreared-and wild fish and significant differences were observed. There were fewer vertebrae (Mean ± SD) in hatchery-reared-(52.5 ± 2.15) than in wild fish (53.7 ± 0.92). For both the hatchery-reared-and the wild individuals, the correlations between number of vertebrae and vertebral column length (VCL) per standard length (SL) were positive. Head length (HL) was approximated as SL minus VCL. Therefore, the proportion of HL in relation to SL became lower with the higher number of vertebrae. Their vertebral number may relate to the difference of body proportions between hatchery-reared-and wild fish.
• Feeding habits of juvenile slime flounder Microstomus achne in the coastal area of southern Hokkaido

  Mitsuhiro Nakaya, Takuzo Abe

  ICHTHYOLOGICAL RESEARCH 58 (4) 377 - 381 1341-8998 2011/11 [Refereed][Not invited]
   

  A total of 45 juvenile [30.0-57.4 mm total length (TL)] slime flounder Microstomus achne were collected in the coastal area of southern Hokkaido from April to July in 2001 and April to June in 2002. Their diets were analyzed. Slime flounder juveniles of 30.0-39.9 mm TL fed predominantly on small crustaceans (gammarid amphipods, harpacticoids and cumaceans) and those of 40.0-57.4 mm TL on gammarid amphipods, cumaceans and polychaetes. The major prey items changed with growth from small crustaceans (e.g., harpacticoids) to polychaetes, although gammarid amphipods were the major prey items throughout the juvenile period (30.0-57.4 mm TL).
• Verification of growth dependent survival in early life history of Pacific saury Cololabis saira using laboratory experiment

  Mitsuhiro Nakaya, Taizo Morioka, Kyohei Fukunaga, Naoto Murakami, Takashi Ichikawa, Sachio Sekiya, Satoshi Suyama, Yasuhiro Ueno, Akio Shimizu

  ENVIRONMENTAL BIOLOGY OF FISHES 92 (1) 113 - 123 0378-1909 2011/09 [Refereed][Not invited]
   

  To understand the survival processes in Pacific saury during the early life stages, growth histories were compared between individuals that died and those that survived under laboratory conditions. The morphology of Pacific saury drastically changed by 40 day after hatching (DAH) under 20A degrees C, and during this period most individuals reached the juvenile stage (40 mm knob length (KnL)). From hatch to this period, high levels of mortality were observed. The back-calculated growth rates analyzed from otolith microstructure were compared among individuals that died and those that survived this period of metamorphosis. Growth rates of individuals that died were significantly lower since 1 DAH than surviving individuals. Factors contributing to mortality are considered to be the cumulative effects of their delayed growth and their less favorable body conditions (growth dependent survival). The body size (40 mm KnL) that is currently used to estimate the recruitment is concluded to be valid for evaluating the recruitment in the field.
• 平成22年度日本水産学会論文賞受賞 Growth and maturation of Pacific saury Cololabis saira under laboratory conditions.

  中屋 光裕

  日本水産学会誌 77 571  2011 [Not refereed][Invited]
  
• Growth and maturation of Pacific saury Cololabis saira under laboratory conditions

  Mitsuhiro Nakaya, Taizo Morioka, Kyouhei Fukunaga, Naoto Murakami, Takashi Ichikawa, Sachio Sekiya, Satoshi Suyama

  FISHERIES SCIENCE 76 (1) 45 - 53 0919-9268 2010/01 [Refereed][Not invited]
   

  This study details the growth and maturation processes of Pacific saury Cololabis saira from eggs to first spawning under laboratory conditions. They were reared at 20A degrees C, and fed almost to satiation every day. There was no significant difference in the knob length (KnL) between males and females, and so data for both sexes were combined in the following Gompertz growth formula: KnL (t) = 277.1 exp[-exp(-0.015 (t - 83.8))]. The first spawning was observed 243 days after hatching (DAH). At the beginning of spawning, when the mean KnL was about 250 mm, only several hundred eggs were spawned at most. The spawning continued, and the number of spawned eggs increased notably after 260 DAH. Correlation and stepwise multiple regression analysis of the gonad somatic index (GSI) of Pacific saury versus KnL, CF, and DAH revealed that only DAH (R = 0.88 and 0.72 for males and females, respectively) was significantly correlated with GSI of Pacific saury (P < 0.001). This result suggests that DAH is one of the most influential factors for maturation in this species.
• Effectiveness of using a vinyl sheet to reduce mortality caused by collision during rearing of Pacific saury Cololabis saira

  M Nakaya, T Morioka, K Fukunaga, N Murakami, T Ichikawa, S Sekiya

  Aquaculture Science 水産増殖談話会 58 (2) 301 - 303 0371-4217 2010 [Refereed][Not invited]
   

  魚類、サンマ科、飼育、死亡率、資材、利用。
• Relationships Between Survival Period and Temperature of Newly Hatched Pacific saury Cololabis saira under Starvation Conditions

  NAKAYA Mitsuhiro, MORIOKA Taizo, FUKUNAGA Kyohei, MURAKAMI Naoto, ICHIKAWA Takashi, SEKIYA Sachio, SUYAMA Satoshi

  Aquaculture Science 水産増殖談話会 57 (4) 625 - 626 0371-4217 2009/12/20 [Not refereed][Not invited]
   

  魚類、サンマ化、稚仔、給餌、生存、水温。
• Comparison of the nutritional transition date distributions of marbled sole larvae and juveniles in Hakodate Bay, Hokkaido

  Mikimasa Joh, Tetsuya Takatsu, Mitsuhiro Nakaya, Naoto Yoshida, Masayasu Nakagami

  FISHERIES SCIENCE 75 (3) 619 - 628 0919-9268 2009/05 [Refereed][Not invited]
   

  To examine survival processes in marbled sole Pseudopleuronectes yokohamae larvae, nutritional transition date distributions (NTDDs) were compared between larvae and large juveniles (LJs) in Hakodate Bay from 2001 to 2003. NTDDs were used instead of hatch date distributions because the onset of increment formation coincides with the timing of the transition from endogenous to exogenous nutritional sources for marbled sole. LJs were defined as being large enough to be safe from predation by the sand shrimp Crangon uritai. In 2001 and 2002, the ranges of the NTDDs of LJs largely overlapped with those of the larvae. However, in 2003, the early cohort (those whose otolith rings formed before 17 March) disappeared from the NTDDs during and after April, and the NTDDs of LJs were heavily biased toward a later period compared to those of the larvae. In 2003, Oyashio coastal water (< 3A degrees C and a parts per thousand currency sign33.0 salinity) unexpectedly intruded into the bay in late March and lowered the water temperature from 6.3A degrees C on 6 March to 4.1A degrees C on 25 March. One possible cause of mortality in the early cohort of 2003 may be feeding failure caused by the extremely low water temperature.
• Validation of otolith daily increments for larval and juvenile Japanese halfbeak Hyporhamphus sajori

  Mitsuhiro Nakaya, Taizo Morioka, Yohei Fukunaga, Sachio Sekiya, Tadao Jinbo, Hiroshi Nagashima, Yasuhiro Ueno

  FISHERIES RESEARCH 93 (1-2) 186 - 189 0165-7836 2008/09 [Refereed][Not invited]
   

  Daily ring formation was verified by examining the growth of the marginal increment on sagittal otoliths of larval and juvenile Japanese halfbeak Hyporhamphus sajori. The relationship between age (x) and number of increments (y) is y = 1.0x + 2.0. The first daily increment was formed during the 2 days before hatching. The relationship between the number of rings deposited after the alizarin complexone (ALC) mark (x) and the number of increments (y) is given by: y = 1.0x-0.2. The index of completion of the Marginal increment was 99 +/- 4.1% (mean +/- S.D.) at 04:00, and from 24 +/- 4.4% at 08:00 it increased with time of clay and reached 98 +/- 3.6% until the next day at 04:00. Growth of the incremental zone started a few hours after sunrise prior to which the discontinuous zone seemed to be formed. Light rhythms tend to be one of the most important factors for the formation of the marginal increment on otoliths. Based oil the relationships between time of day and the marginal increment on otoliths, it Would be possible to estimate the predation time for specimens retrieved from stomach contents, and also clearer analysis of the growth history immediately prior to the sampling time. (c) 2008 Elsevier B.V. All rights reserved.
• Maternal effects and larval survival of marbled sole Pseudopleuronectes yokohamae

  Tomomi Higashitani, Tetsuya Takatsu, Mitsuhiro Nakaya, Mikimasa Joh, Toyomi Takahashi

  JOURNAL OF SEA RESEARCH 58 (1) 78 - 89 1385-1101 2007/07 [Refereed][Not invited]
   

  Maternal effects of animals are the phenotypic influences of age, size, and condition of spawners on the survival and phenotypic traits of offspring. To clarify the maternal effects for marbled sole Pseudopleuronectes yokohamae, we investigated the effects of body size, nutrient condition, and growth history of adult females on egg size, larval size, and starvation tolerance, growth, and feeding ability of offspring. The fecundity of adult females was strongly dependent on body size. Path analysis revealed that the mother's total length positively affected mean egg diameter, meaning that large females spawned large eggs. In contrast, the relative growth rate of adult females negatively affected egg diameter. Egg diameters positively affected both notochord length and yolk sac volume of the larvae at hatching. Under starvation conditions, notochord length at hatching strongly and positively affected days of survival at 14 degrees C but not at 9 degrees C. Under adequate food conditions (1000 rotifers L-1), the notochord length of larvae 5 days after hatching positively affected feeding rate, implying that large larvae have high feeding ability. In addition, the mean growth rate of larvae between 0 and 15 days increased with increasing egg diameter under homogenous food conditions, suggesting that larvae hatched from large eggs might have a growth advantage for at least to 15 days after hatching. In marbled sole, these relationships (i.e., mother's body size-egg size-larval size-larval resistance to starvation-larval feeding ability) may help explain recruitment variability. (c) 2007 Elsevier B.V All rights reserved.
• Annual variation of potential predation impacts on larval and juvenile marbled sole Pseudopleuronectes yokohamae by sand shrimp Crangon uritai in Hakodate Bay, Hokkaido

  Mitsuhiro Nakaya, Tetsuya Takatsu, Mikimasa Joh, Masayasu Nakagami, Toyomi Takahashi

  FISHERIES SCIENCE 73 (1) 112 - 122 0919-9268 2007/02 [Refereed][Not invited]
   

  An investigation was conducted to evaluate the annual variation in potential predation impact (PPI) on larval and juvenile Pseudopleuronectes yokohamae by Crangon uritai in Hakodate Bay using predator-prey size relationships. Laboratory experiments were designed to estimate the favorable prey size of C. uritai through back-calculation of body length (BL) of P. yokohamae from sagittal otolith diameter observed in the stomachs of C. uritai. The most favorable prey-predator size ratio (BL of P. yokohamae-total length (TL) of C. uritai) class was 0.15-0.19, and ranged from 0.12-0.31. There was a significant positive correlation between the BL increase of P. yokohamae and the bottom water temperature in the field, such that BLs stagnated during the cold year of 1999 from April to June, and increased during the warm year of 2002. In contrast, no significant correlation was found between the TL increase of C. uritai and the bottom water temperature. Moreover, there were no significant differences in the mean TL of C. uritai between months (April-June) or years (1998-2002). Variation of PPI depended on the relationships between the growth rates of P. yokohamae and bottom water temperature. Therefore, the warm year of 2002 resulted in higher potential predation impact (PPI >= 20), and it was at least 20 days shorter than that of the cold year of 1999. These results suggest that increased bottom water temperature in the nursery area was one of the most important factors for cumulative predation loss.
• サンマの成熟過程の解明:飼育実験の果たす役割

  巣山哲, 森岡泰三, 中屋光裕, 中神正康, 上野康弘

  水産総合研究センター研究報告 173 - 180 1346-9894 2006/03/31 [Not refereed][Not invited]
  
• Otolith microstructure and daily increment validation of marbled sole (Pseudopleuronectes yokohamae)

  M Joh, T Takatsu, M Nakaya, T Higashitani, T Takahashi

  MARINE BIOLOGY 147 (1) 59 - 69 0025-3162 2005/05 [Refereed][Not invited]
   

  We examined the daily deposition of otolith increments of marbled sole (Pseudopleuronectes yokohamae) larvae and juveniles by rearing experiments, and estimated the growth pattern of wild larvae and juveniles in Hakodate Bay (Hokkaido Island, Japan). At 16&DEG; C, prominent checks (inner checks; ca. 19.8 μ m in diameter) were observed on the centers of sagittae and lapilli extracted from 5-day-old larvae. On both otoliths, distinctive and regular increments were observed outside of the inner checks, and the slopes of regression lines between age and the number of increments (n(i)) (for sagittae: n(i)=0.98xDay-5.90; for lapillus: n(i)=0.96xDay-5.70) did not significantly differ from 1. Inner check formations were delayed at lower temperature, and the inner checks formed 13 days after hatching at 8&DEG; C. Over 80% of larvae, just after their yolk-sac has been absorbed completely (stage C), had inner checks on both their otoliths. On the lapilli, other checks (outer check) formed at the beginning of eye migration (stage G). To validate the daily deposition of increments during the juvenile stage, wild captured P. yokohamae juveniles were immersed in alizarin complexone (ALC)-seawater solutions and reared in cages set in their natural habitat. After 6 days, the mean number of rings deposited after the ALC mark was 5.7. The age-body length relationship of wild P. yokohamae larvae and juveniles caught in Hakodate Bay was divided into three phases. In the larval period, the relationship was represented by a quadratic equation (notochord length = -0.010xAge(2) + 0.682xAge-2.480, r(2)=0.82, P< 0.001), and the estimated instantaneous growth was 0.38 mm day(-1) at 15 days, 0 mm day(-1) at 34 days and -0.12 mm day(-1) at 40 days. The age-body length relationship in the early juvenile stage (< 50 days) and the late juvenile stage (> 50 days) were represented by linear equations (standard length=0.055xAge + 5.722 and standard length = 0.345xAg-9.908, respectively). These results showed that the growth rates in the late larval periods and the early juvenile stage were lower than those in the early larval stage and late juvenile stage; during the slow growth period, energy appears to be directed towards metamorphosis rather than body growth. This study provided the information needed to use otolith microstructure analysis for wild marbled sole larvae and juveniles.
• Catch efficiencies of Hirota's sledge net for crangonid shrimp and juvenile marbled sole

  N Yoshida, T Takatsu, M Nakaya, M Joh, O Kimura, S Shimizu

  NIPPON SUISAN GAKKAISHI 71 (2) 172 - 177 0021-5392 2005/03 [Not refereed][Not invited]
   

  The crangonid shrimp Crangon uritai is one of the predators for marbled sole Pseudopleuronectes yokohamae juveniles in the coastal area of Hakodate Bay, Japan. The catch efficiencies of Hirota's sledge net (mouth size: 60 cm width and 40 cm height) with a distance wheel for C. uritai and P. yokohamae juveniles were obtained to estimate their accurate population densities. Assuning the catch efficiency of the drop trap (a kind of box type quadrat and 0.5 m(2) covered) to be 100%, the catch efficiency of the sledge net was 36-68% for the shrimp and increased with the shift to small body size cohort and so large female individuals disappeared. In contrast, the catch efficiency for P. yokohamae juveniles was lower than that for the shrimp and fluctuated (8-38%), which would be caused by the high escape ability of large juveniles.
• Spatial distribution and feeding habits of the shrimp Crangon uritai as a predator on larval and juvenile marbled sole Pleuronectes yokohamae

  M Nakaya, T Takatsu, M Nakagami, M Joh, T Takahashi

  FISHERIES SCIENCE 70 (3) 445 - 455 0919-9268 2004/06 [Refereed][Not invited]
   

  To examine predation on larval and juvenile Pleuronectes yokohamae by Crangon uritai, the spatial distribution and feeding habits of C. uritai were studied. Crangon uritai fed on various prey, including P. yokohamae. Density-dependent predation on juvenile Crangon spp., larval and juvenile gobiid fish Chaenogobius heptacanthus, mysids, and gammarids was observed. The abundance of alternative prey might, therefore, play an important role in reducing the pressure of predation on P. yokohamae. In each year, C. uritai migrated from depths of 10 In in March to depths of 3 m in May. There was a significant negative correlation between the weighted mean depth (WMD) of C. uritai and the weighted mean bottom water temperature (WMBWT). The migration was, therefore, delayed in the cold spring, during which C. uritai occupied depths of approximately 10 m. In contrast, no significant correlation was found between the WMD of P. yokohamae and WMBWT Settlement of P. yokohamae began at depths of 15 m, mainly during early April. The spatial distributions of these two organisms show greater overlap during the cold spring, resulting in increased opportunities for predation.
• Prey choice order of Crangon uritai as a predator for juvenile marbled sole Pleuronectes yokohamae.

  Mitsuhiro Nakaya, Tetsuya Takatsu, Masayasu Nakagami, Mikimasa Joh, Toyomi Takahashi

  Suisanzoshoku 日本水産増殖学会 = Japan Aquaculture Society 52 (2) 121 - 128 0371-4217 2004 [Refereed][Not invited]
   

  During the spring in the coastal waters of Hakodate Bay the shrimp Crangon uritai is the predominant predator on larval and juvenile marbled sole, Pleuronectes yokohamae. To investigate the prey preferences of C. uritai, P. yokohamae and two other prey species, a mysid Nipponomysis sp. and a gammarid Haustorioides japonicus, were used for predation experiments. Among the three prey organisms studied, Nipponomysis sp. was preyed on first, followed by P. yokohamae, and finally H. japonicus. Prey profitability did not differ between P. yokohamae and Nipponomysis sp., though H. japonicus was less profitable. Nipponomysis sp. was larger, more perceptible, and slower to escape than P. yokohamae. A relatively high abundance of mysid Nipponomysis sp. could restrict and reduce predation on P. yokohamae by C. uritai. Gammarid H japonicus was able to escape relatively more easily, because its harder and slippery skin required more handling time than the other prey, possibly making it an undesirable food source for C. uritai. High perceptibility and low escape ability may be the most important factors affecting prey choice of C. uritai.餌種の特性の違いとエビジャコの餌選択の関係を知るために，捕食実験を行った。実験はエビジャコ5個体に対して，マコガレイ稚魚とその他エビジャコの主要な餌であるアミ類の1種Nipponomysis sp.とヨコエビ類の1種ナミノリソコエビを，それぞれ10個体ずつ同時に与えて行った。捕食結果，マコガレイ稚魚はエビジャコにとって処理に時間を要しない餌であるが，底面から離れることがほとんどないため発見されにくく，逃避能力も高いため，Nipponomysis sp.よりも捕食されにくい餌であった。ナミノリソコエビはマコガレイ稚魚に比べて小型であるが，捕獲してから処理に時間を要するため，最も捕食されにくい餌であった。このことからマコガレイ稚魚よりも相対的に目立ちやすく，逃避能力が低く，かつ処理に時間を要しない餌（アミ類）の存在は，エビジャコによるマコガレイ稚魚の被食頻度を低下させていると考えられた。
• Body-length shrinkage of marbled sole Pseudopleuronectes yokohamae larvae preserved in formalin and in ethanol solutions.

  Mikimasa Joh, Tetsuya Takatsu, Mitsuhiro Nakaya, Kazuo Imura, Tomomi Higashitani

  Suisanzoshoku 日本水産増殖学会 51 (2) 227 - 228 0371-4217 2003 [Refereed][Not invited]
   

  To estimate the live body length of marbled sole larvae from a preserved specimen, the notochord-length (NL) shrinkage due to preservation was investigated. In 5% formalin solution, significant shrinkage was observed in all NL classes after 30 days and 1.5 years preservation (5.2% and 6.3% in the 2.8-5.0 mm class; 3.3% and 3.8% in the 5.1-7.0 mm class; 3.8% and 4.1% in the 7.0-7.7 mm class, respectively) . In 90% ethanol solution, significant shrinkage was observed only in the 2.8-5.0 mm NL class after both durations (4.9% and 6.3%, respectively) . In both preservatives, the influence of preservation on shrinkage was stronger for small larvae than for large ones.
• Spatial and temporal distribution of larval and juvenile marbled sole Pleuronectes yokohamae in Hakodate Bay.

  M Nakagami, T Takatsu, M Nakaya, T Takahashi

  水産海洋研究 65 (3) 85 - 93 2001 [Refereed][Not invited]
  

Books etc

• 水産科学・海洋環境科学実習

  中屋 光裕, 髙津 哲也 (Contributor魚類・ベントス測定)
  海文堂 2019
• 練習船による水産科学・海洋環境科学実習

  中屋光裕, 髙津哲也 (Contributor魚類・ベントス測定)
  五稜出版社 2016

Conference Activities & Talks

• 津軽海峡周辺におけるキアンコウの初期生態  [Invited]

  高偉峰, 中屋光裕, 高津哲也, 竹谷裕平, 鈴木亮, 野呂恭成

  第49回北洋研究シンポジウムー亜寒帯域における魚類の初期生活史研究と加入量予測の現状  2019/09
• ホッケ生活史初期の成長  [Invited]

  河村眞美, 中屋光裕, 高津哲也, 巣山哲, 鈴木祐太郎, 高畠信一

  第49回北洋研究シンポジウムー亜寒帯域における魚類の初期生活史研究と加入量予測の現状  2019/09

MISC

• キアンコウ仔魚の卵帯からのふ出に関する研究

  石川智也, 中屋光裕, 高偉峰, 高津哲也, 小谷健二, 鈴木亮, 野呂恭成, 竹谷裕平  日本水産学会大会講演要旨集(CD-ROM)  2021-  2021
• 陸奥湾のマダラ着底稚魚期までの累積生残率の推定

  高津哲也, 野呂恭成, 菊谷尚久, 吉田達, 伊藤欣吾, 三浦太智, 松谷紀明, 董安然, 中屋光裕  日本水産学会大会講演要旨集(CD-ROM)  2021-  2021
• 陸奥湾における1989-2019年マダラ着底稚魚分布密度調査による加入量予測

  高津哲也, 中屋光裕, 神山晃汰, 亀井佳彦, 小林直人, 飯田高大, 野呂恭成  水産海洋研究  84-  (3)  2020
• スジエビ2タイプの判別と分布

  張成年, 矢田崇, 児玉紗希江, 箱山洋, 丹羽健太郎, 長井敏, 柳本卓, 今井正, 池田実, 槇宗市郎, 大貫貴清, 武藤文人, 野原健司, 古澤千春, 七里浩志, 渾川直子, 浦垣直子, 川村顕子, 市川竜也, 潮田健太郎, 樋口正仁, 手賀太郎, 児玉晃治, 伊藤雅浩, 市村政樹, 松崎浩二, 平澤桂, 戸倉渓太, 中畑勝見, 斎藤和敬, 中屋光裕, 丸山智朗  日本水産学会大会講演要旨集  2018-  131  2018/03/26  [Not refereed][Not invited]
  
• スケトウダラ仔魚の孵化輪紋を用いた母親効果仮説の検証

  梶原慧太郎, 鈴木孝太, 鹿野陽太, 中屋光裕, 高津哲也  日本水産学会大会講演要旨集  2017-  2017
• スケトウダラの卵サイズ選択的生残

  梶原慧太郎, 鈴木孝太, 鹿野陽太, 中屋光裕, 高津哲也  日本水産学会北海道支部大会講演要旨集  2016-  2016
• 道南津軽暖流域で採集されたヒレグロ浮遊仔魚

  鈴木孝太, 中村広和, 中屋光裕, 折野和樹, 梶原慧太郎, 佐藤義崇, 高津哲也  水産海洋学会研究発表大会講演要旨集  2015-  2015
• 噴火湾におけるアカガレイ卵径の季節・年変動

  田村純一, 鈴木孝太, 中屋光裕, 梶原慧太郎, 佐藤義崇, 折野和樹, 高津哲也  水産海洋学会研究発表大会講演要旨集  2015-  2015
• 海洋水産資源開発事業報告書 遠洋かつお釣(太平洋中・西部海域)平成24年度

  木村拓人, 江藤宗義, 佐谷守朗, 大島達樹, 伏島一平, 清藤秀理, 岡本浩明, 南浩史, 松永宏昌, 藤井徹生, 島康洋, 高橋誠, 山田徹生, 米田道夫, 河野悌昌, 町口裕二, 濱田和久, 中屋光裕, 三輪理, 釜石隆, 明田定満, 長谷川勝男, 溝口弘泰, 山越康行, 小田健一  海洋水産資源開発事業報告書 平成24年度 遠洋かつお釣(太平洋中・西部海域)  241P  2014  [Not refereed][Not invited]
  
• 平成24年度海洋水産資源開発事業報告(遠洋かつお釣)(速報)―太平洋中・西部海域:第三十一日光丸

  木村拓人, 江藤宗義, 佐谷守朗, 大島達樹, 伏島一平, 清藤秀理, 岡本浩明, 南浩史, 松永浩昌, 藤井徹生, 島康洋, 高橋誠, 山田徹生, 米田道夫, 河野悌昌, 濱田和久, 中屋光裕, 三輪理, 釜石隆, 明田定満, 長谷川勝男, 溝口弘泰, 山越康行, 小田健一  海洋水産資源開発ニュース  (418)  26P  2013/07  [Not refereed][Not invited]
  
• 海洋水産資源開発事業報告書 遠洋かつお釣(太平洋中・西部海域)平成23年度

  木村拓人, 江藤宗義, 佐々木安之, 佐谷守朗, 大島達樹, 伏島一平, 清藤秀理, 魚崎浩司, 南浩史, 小倉未基, 浜田和久, 島康洋, 高橋誠, 山田徹生, 河野悌昌, 中屋光裕, 橋本博, 松田圭史, 釜石隆, 長谷川勝男, 溝口弘泰, 小田健一  海洋水産資源開発事業報告書 平成23年度 遠洋かつお釣(太平洋中・西部海域)  2013
• 平成23年度海洋水産資源開発事業(遠洋かつお釣)報告(速報)―太平洋中・西部海域:第三十一日光丸―

  木村拓人, 江藤宗義, 佐々木安之, 大島達樹, 伏島一平, 清藤秀理, 魚崎浩司, 南浩史, 小倉未基, 米田道夫, 島康洋, 高橋誠, 山田徹生, 河野悌昌, 中屋光裕, 橋本博, 松田圭史, 釜石隆, 長谷川勝男, 溝口弘泰, 小田健一  海洋水産資源開発ニュース  (408)  24P  2012/06  [Not refereed][Not invited]
  
• 北海道南部太洋平沿岸におけるババガレイ稚魚の食性と成長

  中屋光裕, 阿部拓三  日本水産学会大会講演要旨集  2010-  75  2010/03/26  [Not refereed][Not invited]
  
• 摂餌開始時期の遅れがサンマの成長・生残に及ぼす影響

  中屋光裕, 森岡泰三, 安藤忠, 村上直人, 市川卓, 白藤徳夫, 巣山哲, 上野康弘  日本水産学会北海道支部大会講演要旨集  2009-  52  2009  [Not refereed][Not invited]
  
• 飼育下におけるサンマの産卵数の経時変化

  森岡泰三, 中屋光裕, 巣山哲, 清水昭男, 関谷幸生  日本水産学会大会講演要旨集  2007-  79  2007/03/28  [Not refereed][Not invited]
  
• 飼育サンマにおける生殖腺及び生殖関連形質の変化

  清水昭男, 吉田勝俊, 宇田川美穂, 巣山哲, 森岡泰三, 関谷幸夫, 松原孝博, 澤口小有美, 中屋光裕, 原彰彦  日本水産学会大会講演要旨集  2007-  54  2007/03/28  [Not refereed][Not invited]
  
• サンマの成熟過程の解明:飼育実験の果たす役割 (特別号:独立行政法人水産総合研究センターワークショップ 水産重要魚種の生殖機構と水温による影響 プロシーディング) -- (第6章:親魚飼育の具体例と将来構想)

  巣山 哲, 森岡 泰三, 中屋 光裕  水産総合研究センター研究報告  0-  (0)  173  -180  2006/03  [Not refereed][Not invited]
  
• Prey Choice Order of Crangon uritai as a Predator for Juvenile Pleuronectes yokohamae

  NAKAYA Mitsuhiro, TAKATSU Tetsuya, NAKAGAMI Masayasu, JOH Mikimasa, TAKAHASHI Toyomi  Aquaculture Science  52-  (2)  121  -128  2004/06/20  [Not refereed][Not invited]
   

  餌種の特性の違いとエビジャコの餌選択の関係を知るために、捕食実験を行った。実験はエビジャコ5個体に対して、マコガレイ稚魚とその他エビジャコの主要な餌であるアミ類の1種Nipponomysis sp. とヨコエビ類の1種ナミノリソコエビを、それぞれ10個体ずつ同時に与えて行った。捕食結果、マコガレイ稚魚はエビジャコにとって処理に時間を要しない餌であるが、底面から離れることがほとんどないため発見されにくく、逃避能力も高いため、Nipponomysis sp.よりも捕食されにくい餌であった。ナミノリソコエビはマコガレイ稚魚に比べて小型であるが、捕獲してから処理に時間を要するため、最も捕食されにくい餌であった。このことからマコガレイ稚魚よりも相対的に目立ちやすく、逃避能力が低く、かつ処理に時間を要しない餌（アミ類）の存在は、エビジャコによるマコガレイ稚魚の被食頻度を低下させていると考えられた。
• 函館湾におけるマコガレイ仔魚の日周鉛直分布

  関口督人, 中屋光裕, 城幹昌, 高津哲也  日本水産学会大会講演要旨集  2004-  41  2004/03/31  [Not refereed][Not invited]
  
• マコガレイ仔稚魚の成長履歴解析

  城幹昌, 高津哲也, 中屋光裕, 高橋豊美  日本水産学会大会講演要旨集  2004-  56  2004/03/31  [Not refereed][Not invited]
  
• サヨリ仔稚魚の耳石日周輪形成

  中屋光裕, 森岡泰三, 錦昭夫, 福永恭平, 鈴木重則, 神保忠雄, 永島宏, 上野康弘  日本水産学会北海道支部大会講演要旨集  2004-  43  2004  [Not refereed][Not invited]
  
• フォルマリンとエタノール固定によるマコガレイ仔魚の体長収縮

  城 幹昌, 高津 哲也, 中屋 光裕, ほか2名  水産増殖  51-  (2)  227  -228  2003/06  

  ホルムアルデヒド、エタノール、カレイ類、保存、体長、収縮。

Awards & Honors

• 2014/03 The Japanese Society of Fisheries and Technology The Japanese Society of Fisheries and Technology Encouragement Prize in 2013
   The acquisition of the biological information to contribute the population dynamics model of Pacific saury by captive experiment 

  受賞者: Mitsuhiro Nakaya
• 2011/03 The Japanese Society of Fisheries Science Research article award of the Japanese Society of Fisheries Science in 2011
   Growth and maturation of Pacific saury Cololabis saira under laboratory conditions. 

  受賞者: M. Nakaya;T. Morioka;K. Fukunaga;N. Murakami;T. Ichikawa;S. Sekiya;S. Suyama

Research Grants & Projects

• Detection of maternal effects using field-collected Pacific cod larvae and juveniles and its application to resource management

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research

  Date (from‐to) : 2021/04 -2024/03 

  Author : 高津 哲也, 中屋 光裕

   

  本研究の目的は，産業重要種であるマダラGadus macrocephalusの野外採集仔魚から「母親効果」を検出し，母親効果を考慮した漁獲への変更が，資源量回復にどの程度貢献するのか解明することである。また，環境変動が資源量変動におよぼす影響も同時解析することで，母親効果を利用した資源保護策の有効性も明らかにする． まず，これまでのマダラの親魚量と着底期までの仔稚魚の生残率の関係を明らかにするために，主要産卵場の一つである青森県陸奥湾の1989年から2019年までの両者の豊度の間で累積的生残率を推定し，その年変動を明らかにした．その結果，累積的生残率は仔魚期の前半にあたる2月下旬から3月中旬の水温が高いほど高く，仔魚期の後半と稚魚期にあたる3月下旬から5月下旬の水温が7.6℃で最大値を示すことを明らかにした。水温はそれぞれ全変動の23%と22%を説明した。 次に，孵化仔魚の耳石輪紋に形成される孵化チェック（通常より太い日周輪）の大きさが，卵径に比例するか明らかにするために，2022年1月に津軽海峡で採集した成熟魚を用いて人工授精・飼育を行い，孵化直前の卵と孵化直後の仔魚を得た。また成熟魚の体長や年齢，栄養状態が卵径におよぼす影響を明らかにするために，耳石による年齢査定と魚体測定を行った。 野外採集仔魚は2021年4月と2022年2月に，主要産卵場である青森県陸奥湾でプランクトンネットによる採集を行った。同時に物理環境データと，仔魚の餌生物であるかいあし類ノープリウスの採集を行った。
• Study on the first food of Todarodes pacificus paralarvae focus on bacterial transmission between and mother-to-paralarvae

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research

  Date (from‐to) : 2020/04 -2023/03 

  Author : 山本 潤, 足立 亨介, 柳本 卓, 中屋 光裕
• Effects of egg size, larval growth rate, and juvenile nutritional condition on population dynamics of walleye pollock

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research

  Date (from‐to) : 2016/04 -2019/03 

  Author : TAKATSU Tetsuya, NAKAYA Mitsuhiro

   

  To clarify survival processes in Japan Pacific Stock (JPS) of walleye pollock Gadus chalcogrammus, maternal effect and somatic condition were investigated in Funka Bay in 2016-2018. No annual difference in hatch-check diameter on larval otolith derived from maternal was observed between three year-classes. Notochord lengths in late February and early March were small in low water temperature years. The 75-77% of settled juveniles collected in mid-June have settlement checks around their otoliths and settled fork-lengths were estimated at 67.2-69.0 mm from the relationship between fork length and otolith diameter. Feeding intensities and somatic conditions of juveniles decreased in Tsugaru Warm Current water from August to October, then those recovered with water temperature decreasing after October. Annual fluctuations of somatic condition and growth rate might influence the recruitment of JPS.
• Study on use of microbial loop by Japanese flying squid paralarvae

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research

  Date (from‐to) : 2016/04 -2019/03 

  Author : YAMAMOTO Jun, SAKURAI Yasunori

   

  The present study examined the first food of Todarodes pacificus paralarvae by assuming that the paralarvae consume microorganisms which were produced by biological loop. The bacterial profile of the egg masses which were obtained through natural spawning in a large experimental tank was similar to those of the nidamental gland (the secretary organ of adult). This result suggested that the adhering bacteria might have originated from indigenous or symbiotic bacteria of the nidamental gland. While， metagenome analysis (CI1 and 16S-rRNA) on the gut contents which were extract from wild paralarvae by Laser Micro-dissection showed that the gut contents were consist of many species of eukaryote and prokaryote (the results on eukaryotic results may require additional testing). The result suggested paralarvae intake microorganism called “detritus”.
• Occurrence mechanism of strong-year classes in flathead flounder Hippoglossoides dubius by the assessment of transport process and prey abundance for larvae and juveniles

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research

  Date (from‐to) : 2013/04 -2016/03 

  Author : Takatsu Tetsuya, HOSHI NAOKI, NAKAYA MITSUHIRO, ISODA YUTAKA, INAGAKI YUTA, KANO YOTA, NAKATANI TOSHIKUNI, SUZUKI KOTA, TAMURA JUN'ICHI

   

  To clarify the occurrence mechanism of strong-year classes in flathead flounder Hippoglossoides dubius, transport process of pelagic larvae and juveniles and settled area of juveniles were investigated in Funka Bay and its vicinity in 2013-2015 FY. In May 2013, late pelagic stage larvae were collected with MOHT- and FMT-nets around the area off Muroran City located at the north-east end of the bay, but no larva was collected in 2014-2015. It might be important for the recruitment success in the 2013 year-class that the clockwise vortex off Muroran captured the larvae was retained by the predominantly northwesterly winds. In this vortex, suitable water temperature (4.1-5.6 degrees Celsius) and prey abundance were observed for larval growth. In contrast in August-December through 2013-2015, no settled juvenile was collected on the sea floor with an otter trawl net in and out of the bay with <98-m and 95-354-m bottom depths, respectively.

Educational Activities

Teaching Experience