研究者データベース

亀井 佳彦(カメイ ヨシヒコ)
水産学部 附属練習船おしょろ丸
准教授

基本情報

所属

  • 水産学部 附属練習船おしょろ丸

職名

  • 准教授

学位

  • 水産学士(北海道大学)

J-Global ID

研究キーワード

  • 海洋生物生態   Marine Ecology   

研究分野

  • ライフサイエンス / 水圏生産科学

研究活動情報

論文

  • Yusaku Shimizu, Atsushi Ooki, Hiroji Onishi, Tetsuya Takatsu, Seiji Tanaka, Yuta Inagaki, Kota Suzuki, Naoto Kobayashi, Yoshihiko Kamei, Kenshi Kuma
    JOURNAL OF ATMOSPHERIC CHEMISTRY 74 2 205 - 225 2017年06月 [査読有り][通常論文]
     
    Volatile organic iodine compounds (VOIs) emitted from the ocean surface to the air play an important role in atmospheric chemistry. Shipboard observations were conducted in Funka Bay, Hokkaido, Japan, bimonthly or monthly from March 2012 to December 2014, to elucidate the seasonal variations of VOI concentrations in seawater and their sea-to-air iodine fluxes. The bay water exchanges with the open ocean water of the North Pacific twice a year (early spring and autumn). Vertical profiles of CH2I2, CH2ClI, CH3I, and C2H5I concentrations in the bay water were measured bimonthly or monthly within an identified water mass. The VOI concentrations began to increase after early April at the end of the diatom spring bloom, and represented substantial peaks in June or July. The temporal variation of the C2H5I profile, which showed a distinct peak in the bottom layer from April to July, was similar to the PO4 (3-) variation profile. Correlation between C2H5I and PO4 (3-) concentrations (r = 0.93) suggests that C2H5I production was associated with degradation of organic matter deposited on the bottom after the spring bloom. CH2I2 and CH2ClI concentrations increased substantially in the surface and subsurface layers (0-60 m) in June or July resulted in a clear seasonal variation of the sea-to-air iodine flux of the VOIs (high in summer or autumn and low in spring).
  • Nanako Hioki, Kenshi Kuma, Yuichiroh Morita, Daichi Miura, Atsushi Ooki, Seiji Tanaka, Hiroji Onishi, Tetsuya Takatsu, Naoto Kobayashi, Yoshihiko Kamei
    JOURNAL OF OCEANOGRAPHY 71 6 703 - 714 2015年12月 [査読有り][通常論文]
     
    We studied iron remobilization and nutrient regeneration in bottom water of Funka Bay, Japan, bimonthly from August 2010 to December 2011. The bay basin (bottom depth, 92-96 m) is separated from the northwest Pacific Ocean at its mouth by a sill with a depth of 60 m. After a spring phytoplankton bloom during early March-early April, nutrients in bay bottom water tended to accumulate with time until August-September, and to increase gradually with depth during April-October, by the oxidative decomposition of settling particulate organic matter on the bay bottom. In contrast, the process of iron remobilization into bottom water of the bay is remarkably different from nutrient regeneration. The much higher concentrations of dissolved and total dissolvable iron near the bottom and the seasonally variable relationship between dissolved iron concentration and apparent oxygen utilization in bay bottom water likely reflect a balance between dissolved iron input and removal processes within the bay bottom water. The release of soluble Fe(II) from reducing bay sediments might induce the high concentrations of dissolved and total dissolvable iron in deep-bottom waters of Funka Bay and might be one of the most important sources of iron in Funka Bay. The upward transport of iron from the bay bottom to the surface water during the winter vertical mixing may play an important role in the supply of bioavailable iron for phytoplankton growth in the coastal waters.
  • Yuta Inagaki, Tetsuya Takatsu, Takao Uenoyama, Noriko Yoneda, Shinichi Yokoyama, Yoshihiko Kamei, Naoto Kobayashi, Toyomi Takahashi
    FISHERIES SCIENCE 81 4 687 - 698 2015年07月 [査読有り][通常論文]
     
    To clarify effects of hypoxia on feeding and somatic condition of blackfin flounder Glyptocephalus stelleri, we studied the temporal relationship between hypoxia and feeding intensity as well as the condition of this species in May and August 2006-2012. Hypoxia occurred near the seafloor in August between 2010 and 2012 but not in May. Population densities of gammarid amphipods Ampelisca brevicornis and Melita sp., the main prey items of blackfin flounder, were consistently low; however, the somatic condition and feeding intensity of blackfin flounder increased during hypoxia. Such an increase was not detected in May 2012 under non-hypoxic conditions. These facts imply that the hypoxia increased prey availability for blackfin flounder through the increased exposure of the gammarids over the sea floor, and, thus, resulted in improved body condition in August 2011 and 2012. Hypoxia positively would influence the somatic condition and feeding intensity of blackfin flounder in Funka Bay in August 2011 and 2012; however, the somatic condition during this period did not reach the levels recorded in 1983, suggesting that habitat quality for blackfin flounder in Funka Bay in 2011 and 2012 was worse than that in 1983.
  • Dharmamony Vijai, Mitsuo Sakai, Yoshihiko Kamei, Yasunori Sakurai
    SCIENTIA MARINA 78 4 511 - 519 2014年12月 
    The neon flying squid, Ommastrephes bartramii, is an oceanic squid species that is widely distributed in the North Pacific, with the winter-spring cohort spawning around the Hawaiian Islands. Here, we investigated the spawning characteristics of O. bartramii by analyzing various reproductive parameters of individuals (622 males, 108 females) collected in this region. Female spawning status was determined from the somatic indices and histological characteristics of the ovaries. At all developmental stages, the ovaries of spawned females contained oocytes, and oviduct fullness was not correlated with body size. Thus, because the eggs mature asynchronously, with multiple filling and evacuation events, this species is considered an intermittent spawner. Mature males with developed accessory glands were also present within the distribution range of healthy spawned females, indicating that mating occurs between spawning events. Our data indicate that the first spawning event occurs at a mantle length of similar to 520-540 mm for Hawaiian O. bartramii. Subsequently, the squid forage and grow, and refill the oviducts, before the second spawning event occurs.
  • Yuta Inagaki, Tetsuya Takatsu, Masafumi Kimura, Yota Kano, Toyomi Takahashi, Yoshihiko Kamei, Naoto Kobayashi, Tatsuaki Maeda
    FISHERIES SCIENCE 80 4 725 - 734 2014年07月 [査読有り][通常論文]
     
    To identify the factors that influence the growth rate of flathead flounder Hippoglossoides dubius in Funka Bay, Japan, we studied temporal changes in the growth of this species and its prey from 1989 to 2012. The lowest growth rate of H. dubius was recorded in the 1995 year-class, which had experienced severe hypoxia between 1995 and 1997. However, the highest growth rate was recorded in the 2007 year-class, which had experienced hypoxia between 2009 and 2011. In 2000 and 2001, small-sized flounder (< 200 mm TL) from the 1995 year-class were feeding on mysidaceans, whereas those from other year-classes fed on small Ophiura spp. (< 9 mm in disc diameter) in 2009, 2011, and 2012. Small Ophiura spp. were more abundant in 2007 and 2011 than in 2002 and 2003. Successful recruitment of Ophiura spp. took place between 2007 and 2011 and cohorts from these years could tolerate hypoxia. This suggests that food availability improved under hypoxic conditions, which led to improved growth in small flounders. Large flounders (a parts per thousand yen200 mm TL) from all year-classes fed on prickleback fishes (Stichaeidae) and walleye pollock Gadus chalcogrammus juveniles. The growth of large flounders was enhanced by an increase in the abundance of Stichaeidae fishes and G. chalcogrammus juveniles.
  • 大木 淳之, 三輪 一爾, 大西 広二, 亀井 佳彦, 小林 直人, 久万 健志
    分析化学 62 12 1071 - 1078 公益社団法人 日本分析化学会 2013年12月 [査読有り][通常論文]
     
    2011年10月から2012年8月まで約2か月ごとに北海道噴火湾(内浦湾)で海洋観測を行った.海岸と沿岸,海盆域で海水を採取し揮発性有機ハロゲン化合物(ハロカーボン)の濃度をガスクロマトグラフ質量分析計にて測定した.海洋が主要起源と考えられているブロモホルムの濃度分布を捉え,同一水塊での濃度変化から起源推定を行った.植物プランクトンの大増殖が起こる3月から4月にかけて噴火湾海盆域では,ブロモホルムの濃度が約1.3倍になった(上昇率5 pmol L-1 month-1).この上昇は植物プランクトンによるブロモホルム生産によるものと考えられた.海岸付近の大型藻類の成長が活発になる4月から8月は,海岸付近でブロモホルム濃度が急上昇してから高濃度域が湾全体に広がり,海盆域平均で濃度が約1.7倍になった(上昇率4 pmol L-1 month-1).この上昇は大型藻類によるブロモホルム生産によるものと考えられた.噴火湾のブロモホルム濃度の変化は植物プランクトンと大型藻類の両方の影響を受けることが分かった.
  • 小林 直人, 磯田 豊, 高津 哲也, 木村 修, 亀井 佳彦
    海と空 88 3 127 - 133 海洋気象学会 2013年03月22日 [査読有り][通常論文]
  • Ren Uchida, Kenshi Kuma, Aya Omata, Satoko Ishikawa, Nanako Hioki, Hiromichi Ueno, Yutaka Isoda, Keiichiro Sakaoka, Yoshihiko Kamei, Shohgo Takagi
    JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 118 3 1257 - 1271 2013年03月 [査読有り][通常論文]
     
    We measured water-column iron concentrations from west to east along 47 degrees N in the subarctic North Pacific, and in the Bering Sea. In the North Pacific dissolved Fe (D-Fe) showed surface depletion, mid-depth maxima at 1000-1500 m (west, 1.3-1.6 nM; east, 0.9-1.1 nM), and a gradual decrease with depth below 3500-4000 m depth (west, 1.1-1.4 nM; east, 0.6-0.7 nM). D-Fe and total soluble Fe (T-Fe) in deep water showed a decreasing trend eastward. The higher iron concentrations in western deep waters probably result from higher inputs of dissolved Fe through atmospheric deposition or lateral transport. In contrast, D-Fe throughout the Bering Sea showed a consistent depth regime characterized by a rapid increase with depth to mid-depths, a gradual increase with depth in intermediate water to a maximum of 1.6-1.7 nM at 1500-2250 m, and a gradual decrease with depth to 1.3-1.4 nM at 3700 m. Higher iron concentrations and deeper D-Fe maxima in the Bering Sea are likely due to higher biological productivity and greater and deeper D-Fe input from the decomposition of sinking particulate organic matter in deep water. We suggest that the higher concentrations and deeper input of D-Fe as well as PO4 and humic-type fluorescent dissolved organic matter in the Bering Sea probably results from the longer time for the accumulation of decomposition products resulting from iron supply from the organic-rich downslope sediment along the steep continental slopes and slow replacement of the deep water in the Bering Sea Basin.
  • 山本 潤, 岩森 利弘, 星 直樹, 阿部 拓三, 坂岡 桂一郎, 亀井 佳彦, 高木 省吾, 沼本 修, 阪 幸宏, 桜井 泰憲, 末岡 和久, 有村 博紀, 渡邉 日出海
    水産技術 5 2 171 - 174 水産総合研究センター 2013年02月 [査読無し][通常論文]
     
    本研究では支援船に大型特殊な設備を必要とせずに運用が可能な2,000m級小型ROVシステムの開発と運用法を構築した。本システムはランチャ内に搭載したリチウムイオンバッテリからビークルとランチャに電源を供給し,またランチャをロープで垂下することにより汎用の設備による巻上/下げで潜航/浮上が可能となっている。当初の運用ではランチャに接続する一次ケーブルと水中の荷重を支えるロープとに複雑な絡みが発生したが,絡みを軽減させる器具と低伸縮のロープを用いることにより解消しその運用法を確立した。
  • 小林 直人, 磯田 豊, 高津 哲也, 木村 修, 亀井 佳彦
    海と空 88 2 43 - 48 海洋気象学会 2012年11月30日 [査読有り][通常論文]
  • Saori Kitayama, Kenshi Kuma, Eri Manabe, Koji Sugie, Hyoe Takata, Yutaka Isoda, Kenji Toya, Sei-Ichi Saitoh, Shohgo Takagi, Yoshihiko Kamei, Keiichiro Sakaoka
    Journal of Geophysical Research: Oceans 114 8 2009年08月08日 [査読有り][通常論文]
     
    [1] Dissolved Fe in the western and central North Pacific Ocean was characterized by surface depletion, middepth maxima and, below that, a slight decrease with depth similar to the vertical distributions of nutrients, apparent oxygen utilization, Fe(III) hydroxide solubility, and humic-type fluorescence (H-flu) intensity. Dissolved Fe concentrations ([D-Fe], < 0.22-μm fraction) in the deep water column were one-half lower in the central region (0.3-0.6 nM) than the western region (0.5-1.2 nM) although the Fe(III) solubility ([Fe(III)sol], < 0.025-μm fraction) levels and distributions in deep waters were almost the same between both regions with middepth maxima (∼0.6 nM) at 500-1500-m depth range and then a gradual decrease to ∼0.3 nM at 5000-m depth. Higher [D-Fe] than [Fe(III)sol] in the deep water column of the western region results from the higher production of dissolved Fe from the decomposition of sinking particulate organic matter in the western region than the central region because of the high atmospheric and/or lateral Fe inputs in the western region. Similarity between [D-Fe] level and [Fe(III)sol] value at each deep water depth in the central region may be attributed to [D-Fe] being nearly in the solubility equilibrium with Fe(III) hydroxide in seawater. Strong linear correlation between [D-Fe] and H-flu intensity in the central region and relatively similar linear relationships between [Fe(III)sol] and H-flu intensity in the western and central regions are the first confirmation that humic-type fluorescent dissolved organic matter may be responsible for [D-Fe] in the deep water column as natural organic ligands complexing with Fe(III). Copyright 2009 by the American Geophysical Union.
  • おしょろ丸による夏季ベーリング海陸棚・陸棚斜面観測
    溝端浩平, 齋藤誠一, 久万健志, 目黒敏美, 梶原善之, 高木省吾, 亀井佳彦, 坂岡桂一郎
    月刊海洋 号外 50 116 - 126 2008年 [査読無し][通常論文]
  • 山口 篤, 目黒 敏美, 梶原 善之, 高木 省吾, 亀井 佳彦, 坂岡 桂一郎
    水産海洋研究 68 4 269 - 269 2004年11月10日 [査読無し][通常論文]
  • Maki Nagasawa, Toshiyuki Hibiya, Yoshihiro Niwa, Michio Watanabe, Yutaka Isoda, Shogo Takagi, Yoshihiko Kamei
    Journal of Geophysical Research: Oceans 107 12 2002年12月15日 
    Recent numerical experiments [Hibiya et al., 1996, 1998, 2002] predicted that the energy cascade across the internal wave spectrum down to small dissipation scales was under strong control by parametric subharmonic instabilities that transfer energy from the low vertical wave number, double-inertial frequency wave band to a high vertical wave number, near-inertial frequency wave band. To test whether or not the numerically predicted energy cascade process is actually dominant in the real deep ocean, we deployed a total of 106 expendable current profilers over a large area in the North Pacific to examine the spatial distribution of high vertical wave number (vertical wavelength ∼25 m) shear. At midlatitudes, significant enhancement of the 25 m vertical shear was found over prominent generation regions of semidiurnal internal tides such as the Hawaiian Ridge and the Izu-Ogasawara Ridge where the semidiurnal tidal frequency exceeds twice the local inertial frequency. At high latitudes, in contrast, no significant enhancement of the 25 m vertical shear was found to occur even over another prominent generation region of semidiurnal internal tides, the Aleutian Ridge, where the semidiurnal tidal frequency is less than twice the local inertial frequency. We find that the spatial distribution of the intensity of the 25 m vertical shear correlates very well with that of the low vertical wave number, double-inertial frequency internal wave energy numerically predicted by Nagasawa et al. [2000] and Niwa and Hibiya [2001a, 2001b]. This is the first in situ evidence for the dominant role of parametric subharmonic instability in transferring deep ocean internal wave energy down to small dissipation scales. This study provides a theoretical framework for future attempts to determine the large-scale structure of mixing over the world's oceans.
  • Yoshimasa Uehara, Masahiro Ue, Yoshihiko Kamei, Motoo Baba, Ken Kikuchi, Kunimoto Hotta, Koichi Makimura, Kazuhiko Shibuya, Kazuo Suzuki, Shiro Naoe, Shoichi Niimi
    The Japanese journal of antibiotics 55 4 446 - 81 2002年08月
  • Y Kamei, T Takatsu, S Takagi, T Nakatani, T Takahashi, T Maeda
    NIPPON SUISAN GAKKAISHI 65 2 223 - 229 1999年03月 [査読有り][通常論文]
     
    In order to elucidate the association between the distribution and maturation of adult walleye pollock Theragra chalcogramma, otter trawl samplings were carried out in the Japan Sea off the southwest Hokkaido in October from 1989 to 1994, CPUE values of walleye pollock were significantly higher in the coastal region than those in the offshore region through the sampling years except for 1994. Proportions of males were significantly higher in the coastal region except for 1993 and 1994, Many males were nearly mature, and no differences in male gonad indices were found either between coastal and offshore regions or among the coastal areas. In contrast, females collected in the coastal region were more mature than those in the offshore region. Clear geographical differences in body length were not found either among males or among females. Sexual differences in reproductive behavior and maturity might be responsible for the skewed distribution pattern of adult walleye pollock in October.
  • K. Kooka, T. Takatsu, Y. Kamei, T. Nakatani, T. Takahashi
    Fish. Sci. 64 5 686 - 693 1998年10月 [査読有り][通常論文]
     
    Vertical distributions of adult walleye pollock Theragra chalcogramma and oceanographic conditions were examined in the northern Japan Sea. In the daytime, most walleye pollock were distributed from 150 to 250 m depth in April and from 400 to 500 m depth in October. Between 150 and 500 m depth, temperatures in October (0.4-8.8°C) were similar to those in April (0.5-5.4°C), salinity levels were fairly uniform in both months (34.0-34.2 PSU), and dissolved oxygen concentrations were 4.6-6.1 ml/l in April and 4.7-6.4 ml/l in October. The main foods of walleye pollock in April were the amphipod Themisto japonica, the euphausiid Thysanoessa longipes, and the chaetognath Sagitta elegans. Daytime weighted mean depths of T. longipes were significantly greater in October than in April. Biomass of T. longipes in the habitat of walleye pollock was significantly greater than other layers in both months. The seasonal change in vertical distribution of walleye pollock is presumably related to food availability of T. longipes.
  • 小岡 孝治, 高津 哲也, 亀井 佳彦, 中谷 敏邦, 高橋 豊美
    日本水産学会誌 63 4 537 - 541 日本水産學會 1997年07月15日 [査読有り][通常論文]
     
    The diet and feeding intensity of walleye pollock Theragra chalcogramma were investigated in April and October 1993, and in April 1994. Specimens ranging from 262 to 456mm in standard length were sampled with a mid-water trawl off Hiyama Subprefecture and Aomori Prefecture in the northern Japan Sea. The main food items were large-sized zooplankton. In April, pollock fed chiefly on euphausiids (Thysanoessa longipes), chaetognaths, and hyperiid amphipods (Themisto japonica). In October, the main food organisms were hyperiid amphipods (T. japonica). Stomach-content weight indices indicated that the feeding intensity of pollock was stronger in April (after spawning) than in October (before spawning). The numerical compositions of food categories in April differed among sampling stations. Such differences were not observed in October. It seems likely that the distinct variation of diets in April is ascribed to geographic differences in zooplankton composition in the mesopelagic zone.
  • S Takagi, T Maeda, Y Kamei, T Nakatani, T Takatsu, T Takahashi
    NIPPON SUISAN GAKKAISHI 62 2 205 - 212 1996年03月 [査読有り][通常論文]
     
    In order to elucidate the distribution pattern of walleye pollock Theragra chalcogramma off southwestern Hokkaido in the Japan Sea, trawling and acoustic surveys, and hydrographic observations were conducted in early April from 1989 to 1993, In 1991 and 1993, the Tsushima Warm Current Water was widely distributed in the coastal area of Aomori Prefecture, and a large number of walleye pollock were collected in the southwestern area off Hokkaido. In contrast, this water was observed only in a restricted coastal area of Aomori Prefecture in 1989 and 1990, and walleye pollock were found distributed in a coastal area 20-30 miles off Aomori Prefecture. Although an annual change in the distribution of walleye pollock was observed, they were concentrated in the area of the horizontal thermal front between the Tsushima Warm Current Water and the Japan Sea Proper Water every year. From these observations, it appears that the migration of walleye pollock. in early spring is closely related to the behavior of the Tsushima Warm Current Water in the Japan Sea off Aomori Prefecture.
  • Hideo Miyake, Seiji Sasaki, Hidekazu Yamaguchi, Kiyoshi Masuda, Gen Anma, Yoshihiko Kamei
    Journal of Oceanography 51 1 99 - 109 1995年02月 
    Thermohaline staircases off Cape Erimo, Hokkaido are described and their physical properties are compared with those in other seas. The mean fluxes for heat and salt across the interface induced by salt finger were estimated as 105 cal cm-2d-1, and 0.03 g cm-2d-1, respectively. These values were in the same order as those in Caribbean Sea. The "effective eddy diffusivities" were also in the same order as the Caribbean ones. This suggests that the double-diffusive convection plays on important role on the water mass conversions occurring in the interfrontal zone between the Oyashio and the Kuroshio Waters. © 1995 Oceanographic Society of Japan.

その他活動・業績

  • 令和2年度 北水協会研究助成事業 報告噴火湾における底生生物資源と漁場環境に関する研究(3)底生生物資源の変動
    2021年05月
  • 令和元年度 北水協会研究助成事業 報告噴火湾における底生生物資源と漁場環境に関する研究(3)底生生物資源の変動
    2020年05月
  • 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年
  • 平成30年度 北水協会研究助成事業 報告噴火湾における底生生物資源と漁場環境に関する研究(3)底生生物資源の変動
    2019年05月
  • 平成29年度 北水協会研究助成事業報告 噴火湾における底生生物資源と漁場環境に関する研究 III 底生漁業資源の変動
    高津哲也, 中屋光裕, 亀井佳彦, 小林直人, 飯田高大, 鈴木孝太, 中脇鴻陽, 山岡秀圭, 粂信之介 2018年04月
  • 平成28年度 北水協会研究助成事業報告 噴火湾における底生生物資源と漁場環境に関する研究 III 底生生物資源の変動
    高津哲也, 亀井佳彦, 中屋光裕, 小林直人, 飯田高大, 鈴木孝太, 折野和樹 2017年05月
  • 平成27年度 北水協会研究助成事業報告 噴火湾における底生生物資源と漁場環境に関する研究 III 底生生物資源の変動
    高津哲也, 亀井佳彦, 中屋光裕, 小林直人, 鈴木孝太, 田村純一, 折野和樹 2016年05月
  • 平成26年度 北水協会研究助成事業報告 噴火湾における底生生物資源と漁場環境に関する研究 III 底生漁業資源の変動
    高津哲也, 亀井佳彦, 中屋光裕, 小林直人, 鈴木孝太, 中谷敏邦 2015年04月
  • 清水 悠作, 大木 淳之, 久万 健志, 大西 広二, 亀井 佳彦, 小林 直人 日本地球化学会年会要旨集 62 89 -89 2015年 
    CH2I2、C2H5Iなど揮発性有機ヨウ素化合物(volatile organoiodine compound:VOI)は、海から大気へヨウ素を供給するキャリアーとして機能する。本研究では、VOIと生物生産性や有機物分解との関係を調べるために、北海道噴火湾で2012年3月から2014年12月の隔月に海水を採取し、海水中VOI濃度をパージ&トラップ-ガスクロマトグラフ-質量分析法で測定した。
    春季植物プランクトンブルーム終了後の5月以降にVOI濃度は急激に増加し始め、6月から7月に年間ピークに達した。ピーク深度はVOI成分により異なった。このようなピーク深度の違いは、生成メカニズムの違いを示しており、こうした海水中VOIの生成メカニズムの違いは、大気への放出特性にも反映されると考えられる。
  • 平成25年度 北水協会研究助成事業報告 III 底生漁業資源の変動
    高津哲也, 亀井佳彦, 稲垣祐太, 木村修, 小林直人, 中谷敏邦 2014年04月
  • 清水 悠作, 大木 淳之, 久万 健志, 大西 広二, 亀井 佳彦, 小林 直人 日本地球化学会年会要旨集 61 202 -202 2014年 
    CH2I2などの海水中の揮発性有機ヨウ素化合物(Volatile organoiodine compound;VOI)は、海洋から大気へのヨウ素の主なキャリアーとして知られるが、生成過程などは明らかになっていない。本研究では、VOIと生物生産性や有機物分解との関係を明らかにするため、VOIと生物化学パラメータのモニタリングを行った。北海道噴火湾にて、VOI(CH2I2、CH3I、CH2ClI)濃度や、生物科学パラメータの定点測定を、2012年3月から2014年6月まで行った。春季の植物プランクトンブルームが終焉し、植物プランクトンが老化、死滅する時期に、VOIが多量に生成されることがわかった。CH2I2増分が2013年は2012年の半分であったことより、VOI生成量には経年差がみられた。
  • 前川 和義, 松崎 優哉, 亀井 佳彦, 坂岡 佳一郎, 安間 洋樹, 木村 暢夫 日本水産工学会 学術講演会 学術講演論文集 2014 147 -148 2014年
  • 平成24年度 北水協会研究助成事業報告 噴火湾における底生魚類資源と漁場環境に関する研究 III底生魚類の資源変動
    高津哲也, 亀井佳彦, 稲垣祐太, 木村修, 小林直人, 中谷敏邦 2013年04月
  • 平成23年度 北水協会研究助成事業報告 噴火湾における底生魚類資源と漁場環境に関する研究 III底生魚類の資源変動
    高津哲也, 亀井佳彦, 稲垣祐太, 中谷敏邦, 木村修, 小林直人 2012年04月
  • 星 直樹 NPAFC Doc. 1226. 2010年02月 [査読無し][通常論文]
  • 栗原縁, 渡部千種, 高木省吾, 亀井佳彦, 坂岡桂一郎, 星直樹, 阿部拓三, 桜井泰憲 水産海洋学会研究発表大会講演要旨集 2010 19 2010年 [査読無し][通常論文]
  • 渡部千種, 栗原縁, 高木省吾, 亀井佳彦, 坂岡桂一郎, 星直樹, 阿部拓三, 桜井泰憲 水産海洋学会研究発表大会講演要旨集 2010 89 2010年 [査読無し][通常論文]
  • Saori Kitayama, Kenshi Kuma, Eri Manabe, Koji Sugie, Hyoe Takata, Yutaka Isoda, Kenji Toya, Sei-ichi Saitoh, Shohgo Takagi, Yoshihiko Kamei, Keiichiro Sakaoka J. Geophys. Res.(CD-ROM) 114 (8) C08019, doi:10.1029/2008JC004754 2009年08月 [査読無し][通常論文]
     
    Dissolved Fe in the western and central North Pacific Ocean was characterized by surface depletion, middepth maxima and, below that, a slight decrease with depth similar to the vertical distributions of nutrients, apparent oxygen utilization, Fe(III) hydroxide solubility, and humic-type fluorescence (H-flu) intensity. Dissolved Fe concentrations ([D-Fe], <0.22-mu m fraction) in the deep water column were one-half lower in the central region (0.3-0.6 nM) than the western region (0.5-1.2 nM) although the Fe(III) solubility ([Fe(III)sol], <0.025-mu m fraction) levels and distributions in deep waters were almost the same between both regions with middepth maxima (similar to 0.6 nM) at 500-1500-m depth range and then a gradual decrease to similar to 0.3 nM at 5000-m depth. Higher [D-Fe] than [Fe(III)sol] in the deep water column of the western region results from the higher production of dissolved Fe from the decomposition of sinking particulate organic matter in the western region than the central region because of the high atmospheric and/or lateral Fe inputs in the western region. Similarity between [D-Fe] level and [Fe(III)sol] value at each deep water depth in the central region may be attributed to [D-Fe] being nearly in the solubility equilibrium with Fe(III) hydroxide in seawater. Strong linear correlation between [D-Fe] and H-flu intensity in the central region and relatively similar linear relationships between [Fe(III)sol] and H-flu intensity in the western and central regions are the first confirmation that humic-type fluorescent dissolved organic matter may be responsible for [D-Fe] in the deep water column as natural organic ligands complexing with Fe(III).
  • Salmon Stock Assessment in the North Pacific Ocean, 2009
    NPAFC Documents 1193 1 -8 2009年 [査読無し][通常論文]
  • 2008 T/V Oshoro-maru Salmon Research Cruises
    NPAFC Documents 1158 1 -17 2009年 [査読無し][通常論文]
  • 2007 T/V Oshoro-maru Salmon Research Cruises
    NPAFC Documents 1088 1 -26 2008年 [査読無し][通常論文]
  • Results of 2006 Salmon Research Cruise of the Oshoro maru
    NPAFC Documents 1021 1 -16 2007年 [査読無し][通常論文]
  • Results of 2005 Salmon Research Cruise of the Oshoro maru
    NPAFC Documents 940 1 -19 2006年 [査読無し][通常論文]
  • 山口篤, 横井裕, 栗山圭輔, 亀井佳彦, 坂岡桂一郎, 池田勉 日本海洋学会大会講演要旨集 2005 193 2005年09月05日 [査読無し][通常論文]
  • 栗藤 亜希子, 平岡 優子, 高津 哲也, 伊村 一雄, 小林 直人, 亀井 佳彦 水産海洋研究 69 (3) 145 -155 2005年08月 [査読無し][通常論文]
  • Tsuyoshi Shimura, Jun Yamamoto, Yoshihiko Kamei and Yasunori Sakurai: "Possible Spawning by the Japanese common squid, Todarodes pacificus at Yamato rise, Sea of Japan" Phuket mar. biol. Cent. Res. Bull.66: 267-273(2005)
    2005年 [査読無し][通常論文]
  • Toshimi Meguro, Yoshiyuki Kajiwara, Shogo Takagi, Yoshihiko Kamei, Keiichiro Sakaoka and Jun-ichi Kimura: " Results of 2003 Salmon Research Cruise of the Oshoro maru" NPAFC Doc.840 (2005)
    2005年 [査読無し][通常論文]
  • 山口 篤, 目黒 敏美, 梶原 善之, 高木 省吾, 亀井 佳彦, 坂岡 桂一郎 水産海洋研究 68 (4) 269 -269 2004年11月10日
  • 山口篤, 今尾史義, 佐野史和, 池田勉, 坂岡桂一郎, 亀井佳彦 日本海洋学会大会講演要旨集 2004 299 2004年03月26日 [査読無し][通常論文]
  • T.Meguro, Y.Kajiwara, S.Takagi, Y.Kamei, K.Sakaoka and J.Kimura:"Results of 2003 Salmon Research Cruise of the Oshoro maru"NPAFC Doc.748(2004)
    2004年 [査読無し][通常論文]
  • T.Meguro, Y.Kajiwara, S.Takagi, Y.Kamei, K.Sakaoka and J.Kimura:"Results of 2002 Salmon Research Cruise of the Oshoro maru", NPAFC Doc.,663 22p(2003)
    2003年 [査読無し][通常論文]
  • Nagasawa, M., T.Hibiya, Y.Niwa, M.Watanabe, Y.Isoda, S.Takagi, and Y.Kamei:"Distribution of fine-scale shear in the deep waters of the North Pacific obtained using expendable current profilers", J. Geophys. Res., 107(C12), 3221, doi:10.1029/2002JC00137・・・
    2002年 [査読無し][通常論文]
     
    Nagasawa, M., T.Hibiya, Y.Niwa, M.Watanabe, Y.Isoda, S.Takagi, and Y.Kamei:"Distribution of fine-scale shear in the deep waters of the North Pacific obtained using expendable current profilers", J. Geophys. Res., 107(C12), 3221, doi:10.1029/2002JC001376(2002)*
  • Meguro,T.,Kamei,Y.,Kobayashi,N., and Ito, S.:"Results of the 2001 Salmon Research Cruises of the Hokusei Maru", NPAFC Doc.,548:1-21(2001)
    2001年 [査読無し][通常論文]
  • 谷津 明彦, 森 純太, 田中 博之, 渡邊 朝夫, 長澤 和也, 石田 行正, 目黒 敏美, 亀井 佳彦, 桜井 泰憲 水産海洋研究 64 (4) 246 -247 2000年11月30日
  • A Yatsu, T Watanabe, J Mori, K Nagasawa, Y Ishida, T Meguro, Y Kamei, Y Sakurai FISHERIES OCEANOGRAPHY 9 (2) 163 -170 2000年06月 [査読無し][通常論文]
     
    Yatsu,A.,Watanabe,T.,Mori,J.,Nagasawa,K.,Ishida,Y.,Meguro,T.,Kamei,Y. and Sakurai,Y.: “Interannual variability in stock abundance of the neon flying squid, Ommastrephes bartramii, in the North Pacific Ocean during 1979-1998: impact of driftnet fishing and oceanographic conditions”, Fisheries Oceanography, 9:2, 163-170,2000*
  • Meguro,T.,Kamei,Y.,Kobatashi,N.,Yoshida,T. and Kimura,O.:“Results of the 2000 Salmon research cruises of the Hokusei maru”,NPAFC Doc. 486(2000)
    2000年 [査読無し][通常論文]
  • 亀井 佳彦, 高津 哲也, 高木 省吾, 中谷 敏邦, 高橋 豊美, 前田 辰昭 日本水産学会誌 65 (2) 223 -229 1999年03月15日 [査読無し][通常論文]
     
    スケトウダラ成魚の水平分布様式と成熟度との関係を解明するために, 1989∿1994年の10月に北海道南西部沖合においてオッタートロール綱による標本採集を行った。1994年を除いて, スケトウダラのCPUE値は沖合域より沿岸域の方が有意に高かった。また, 雄個体の占める割合も1993年と1994年を除いて沿岸域で有意に高かった。多くの雄は完熟に近く, 水域間で生殖腺重量指数の差は認められなかった。雌においては沖合域よりも沿岸域でより成熟した個体が出現した。体長の地理的変化は雌雄ともに明瞭ではなかった。本種のこの時期の水平分布は雌雄間の繁殖行動および成熟度の差に起因するものと考えられた。
  • Yamaguchi,H., Takagi,S., Kamei Y., Yoshida T., Kimura J., Gen Anma and Onishi,H.:"The 1999 International Cooperative Salmon Research Cruise of The Oshoro Maru", NPAFC Doc.419 (1999)
    1999年 [査読無し][通常論文]
  • 高木 省吾, 桜井 泰憲, 亀井 佳彦, 明井 崇子, 坂岡 桂一郎, 志賀 直信 北海道大学水産学部研究彙報 48 (1) 13 -28 1997年08月 [査読無し][通常論文]
     
    Oceanographic conditions and distribution of pelagic nekton during the summer and fall in 1995 and 1996 in the northwestern North Pacific Ocean were examined. The gillnet survey and hydrographic observations were conducted along 155°E longitude from 32° to 44° N latitude. The Kuroshio Front located at the northern boundray of the Kuroshio Extension current was found near 38°N in the summer and fall. In the summer, warm water from the Kuroshio was found in the Subarctic Domain. The warm water was associated with an increase in chlorophyll-a and zooplankton. In the fall, Intermediate Cold Water occured in the Subarctic Domain, and concentration of nutrients and chlorophyll-a were high in fine structure. The distribution of pelagic nekton differed in the summer and fall. In the summer, the dominant species north side of the front were pink salmon Oncorhynchus gorbuscha and chum salmon O.keta. The dominant species around the front was flying squid Ommastrephes bartramii. In the fall, the dominant species in subtropical waer were flying squid and dolphin Coryphaena hippurus. The distribution of flying squid was controlled by the Kuroshio Front. In the summer, the front corresponded to the boundary between LL-size group (north side) and the small-size group (south side). In the fall, the front corresponded to the boundary between immature (north side) and mature (south side) squid.
  • 高木 省吾, 前田 辰昭, 亀井 佳彦, 中谷 敏邦, 高津 哲也, 高橋 豊美 日本水産学会誌 62 (2) 205 -212 1996年03月15日 [査読無し][通常論文]
     
    In order to elucidate the distribution pattern of walleye pollock Theragra chalcogramma off southwestern Hokkaido in the Japan Sea, trawling and acoustic surveys, and hydrographic observations were conducted in early April from 1989 to 1993. In 1991 and 1993, the Tsushima Warm Current Water was widely distributed in the coastal area of Aomori Prefecture, and a large number of walleye pollock were collected in the southwestern area off Hokkaido. In contrast, this water was observed only in a restricted coastal area of Aomori Prefecture in 1989 and 1990, and walleye pollock were found distributed in a coastal area 20-30 miles off Aomori Prefecture. Although an annual change in the distribution of walleye pollock was observed, they were concentrated in the area of the horizontal thermal front between the Tsushima Warm Current Water and the Japan Sea Proper Water every year. From these observations, it appears that the migration of walleye pollock in early spring is closely related to the behavior of the Tsushima Warm Current Water in the Japan Sea off Aomori Prefecture.
  • Y. Ishida, S. Ito, G. Anma, T. Meguro, S. Takagi, Y. Kamei, N. D. Davis, and K. W. Myers : "Salmon Stock Assessment aboard the Japanese Salmon Research Vessels in the North Pacific Ocean, 1996", North Pacific Anadromous Fish Commission, 210 : 1-29 (1996)
    1996年 [査読無し][通常論文]
  • 梶原 善之, 飯田 浩二, 亀井 佳彦 北海道大学水産学部研究彙報 41 (4) p205 -212 1990年11月

共同研究・競争的資金等の研究課題

  • 北太平洋に於ける表層性魚類およびイカ類の生物学的研究
    研究期間 : 1989年
  • Pelagic fish and squids ecology in the North Pacific
    研究期間 : 1989年

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