研究者詳細 - 下出　信次

Chaetognaths are ubiquitous in the marine environment and are among the most abundant carnivorous plankton. Nevertheless, characterization of physiological parameters remains limited largely due to the difficulty in obtaining the data from pelagic chaetognaths in laboratory studies. This study therefore aimed to determine the feeding and growth rates of Zonosagitta nagae under laboratory rearing condition. A total of 54 field-collected chaetognaths with maturity Stage I and II ranging from 5 to 12 mm in body length collected in June, August and October were individually incubated at 20–22°C with excess copepod prey and growth parameters were obtained from 26 individuals that survived ~10–46 days. For Z. nagae, ingestion and growth rates increased with body dry weight, and both parameters were significantly related, indicating that gross growth efficiency was ~47%. Specific ingestion rates ranged from 0.03 to 0.43 d−1 and tended to decrease with an increase of size of the chaetognaths. Individual specific growth rate varied widely in small-sized individuals (~6 mm), ranging from −0.103 to 0.135, but became relatively constant (~0.032) with increasing size. Overall the study results suggest that Z. nagae is characterized by high gross growth efficiency, which is in striking contrast with previously studied inshore species.

その他リンク： https://academic.oup.com/plankt

Photochemical Production and Biological Consumption of CO in the SML of Temperate Coastal Waters and Their Implications for Air-sea CO Exchange.

Sugai, Y., K. Tsuchiya, S. Shimode and T. Toda

Journal of Geophysical Research: Oceans 125 ( 4 ) e2019JC015505 2020年3月 [査読有り]

DOI

記述言語：英語掲載種別：研究論文（学術雑誌）共著

The sea surface microlayer (SML), less than 1,000‐μm uppermost layer of the ocean water column, is located at the air‐sea interface and plays critical roles in global biogeochemical cycles and climate change through air‐sea gas exchange. To clarify the significance of the dynamics of carbon monoxide (CO) in the SML, where active photochemical and biological processes are expected, in air‐sea CO exchange, the production and consumption of CO in the SML and its sea‐air emission were investigated in temperate coastal waters. In the SML, the light‐normalized photochemical CO production rate was relatively high from spring to autumn (median: 2.57 nM [kWh m−2]−1) when relatively high absorbance of chromophoric dissolved organic matter (0.55 m−1) was observed. Biological CO consumption rate constant in the SML showed relatively high values from spring to autumn (mean ± standard deviation: 0.060 ± 0.010 h−1) during the period of relatively high water temperature (22.3 ± 2.7 °C). The calculated sea‐air CO flux (F) varied similarly to CO concentration in the subsurface water. Comparison among the production, consumption, and sea‐air emission of CO in the SML suggests that biological consumption in the SML can be ignored in air‐sea CO exchange throughout the year whereas photochemical production in the SML enhances F during summer under intense light, active biological production, and weak wind conditions. Further, seawater warming experiments found the tendency of the stimulation of biological CO consumption by water temperature increase from spring to autumn, which suggests negative but insignificant feedback on global warming.

Incorporation characteristics of exogenous 15N-labeled thymidine, deoxyadenosine, deoxyguanosine and deoxycytidine into bacterial DNA

Tsuchiya, K., T. Sano, T. Tomioka, A. Kohzu, K. Komatsu, R. Shinohara, S. Shimode, T. Toda, A. Imai

PLoS ONE 15 ( 2 ) e0229740 2020年2月 [査読有り]

DOI

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Bacterial production has been often estimated from DNA synthesis rates by using tritium-labeled thymidine. Some bacteria species cannot incorporate extracellular thymidine into their DNA, suggesting their biomass production might be overlooked when using the conventional method. In the present study, to evaluate appropriateness of deoxyribonucleosides for evaluating bacterial production of natural bacterial communities from the viewpoint of DNA synthesis, incorporation rates of four deoxyribonucleosides (thymidine, deoxyadenosine, deoxyguanosine and deoxycytidine) labeled by nitrogen stable isotope (15N) into bacterial DNA were examined in both ocean (Sagami Bay) and freshwater (Lake Kasumigaura) ecosystems in July 2015 and January 2016. In most stations in Sagami Bay and Lake Kasumigaura, we found that incorporation rates of deoxyguanosine were the highest among those of the four deoxyribonucleosides, and the incorporation rate of deoxyguanosine was approximately 2.5 times higher than that of thymidine. Whereas, incorporation rates of deoxyadenosine and deoxycytidine were 0.9 and 0.2 times higher than that of thymidine. These results clearly suggest that the numbers of bacterial species which can incorporate exogenous deoxyguanosine into their DNA are relatively greater as compared to the other deoxyribonucleosides, and measurement of bacterial production using deoxyguanosine more likely reflects larger numbers of bacterial species productions.

その他リンク： https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0229740

Guanine crystals regulated by chitin-based honeycomb frameworks for tunable structural colors of sapphirinid copepod, Sapphirina nigromaculata

Kimura Tsubasa, Takasaki Mihiro, Hatai Ryosuke, Nagai Yukiko, Uematsu Katsuyuki, Oaki Yuya, Osada M … 全著者表示

SCIENTIFIC REPORTS 10 ( 1 ) 2020年2月 [査読有り]

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

相模湾における寄生性渦鞭毛藻類の浮遊性カイアシ類Calanus sinicusの卵生産に与える影響

下出信次

日本プランクトン学会報 66 ( 2 ) 106 - 108 2019年8月

記述言語：英語掲載種別：研究論文（研究会，シンポジウム資料等）単著

Effects of container size, density, and incubation period on ammonium excretion rate measurements of planktonic copepods: Validation with a highly sensitive analytical method

Nakamura Ken-ichi, Takahashi Kazutaka, Shimode Shinji, Shimizu Yugo, Furuya Ken

PLANKTON & BENTHOS RESEARCH 14 ( 2 ) 62 - 70 2019年5月 [査読有り]

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：日本プランクトン学会、日本ベントス学会共著

Ammonium excretion by planktonic copepods is an important process supplying nitrogen to primary producers and other microbial activity in pelagic ecosystems. Because of methodological constraints, conventional analyses using sealed chamber methods have required the adoption of unnatural experimental settings, such as a small container, high density, or a long incubation for ammonium excretion measurements. Therefore, most of the estimated ammonium excretion rates are potentially linked to stresses on the experimental animals during incubation. In this study, the effects of container size, density, and incubation period on the ammonium excretion rates of five copepod species (Calanus sinicus, Eucalanus californicus, Metridia pacifica, Pleuromamma abdominalis, P. gracilis) were examined using a highly sensitive analytical method that has recently been developed to measure ammonium concentration at the nanomolar level. The results indicate that responses to experimental stresses are species-specific, while incubation in a small container was generally the most significant factor causing overestimation (up to 2.6 times) of the excretion rates. This study shows that this highly sensitive analysis method, which allows short incubations with a single individual in a relatively large-sized container is an appropriate method to estimate ammonium excretion of pelagic copepods in the field using the sealed chamber method.

その他リンク： https://ci.nii.ac.jp/naid/130007652795

Identification of molecular markers associated with starvation in female Calanus sinicus (Copepoda: Calanoida)

Ohnishi Takuya, Hirai Junya, Shimode Shinji, Tsuda Atsushi

MARINE ECOLOGY PROGRESS SERIES 614 51 - 65 2019年4月 [査読有り]

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Dead heat: copepod carcass occurrence along the Japanese coasts and implications for a warming ocean

Tang, K. W., Ivory, J. A., Shimode, S., Nishibe, Y., K. Takahashi

ICES Journal of Marine Science 2019年3月 [査読有り]

DOI

記述言語：英語掲載種別：研究論文（学術雑誌）共著

その他リンク： https://doi.org/10.1093/icesjms/fsz017

Digestion time and feeding of the pelagic chaetognath Zonosagitta nagae in the laboratory

OTAKE SHIORI, TAKAHASHI KAZUTAKA, SHIMODE SHINJI

Plankton and Benthos Research 14 ( 1 ) 39 - 44 2019年 [査読有り]

DOI

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：日本プランクトン学会、日本ベントス学会共著

Digestion time and feeding of the pelagic chaetognath Zonosagitta nagae, which occurs predominantly in warm waters around Japan, were investigated in the laboratory. Young individuals of Z. nagae ranging from 4.1–7.6 mm in body length were used for the experiments with adult females of the copepod Acartia steueri as prey. The mean digestion time of Z. nagae was 115±3 minutes at 20°C. Temporal change in individual's feeding intensity was observed every 1.5 h for 24 h to determine the diel feeding pattern, feeding interval, feeding rates and daily ration. Almost all individuals showed no clear diel rhythm within 24-h at 20°C under 12L:12D cycle; time interval between feeding was 4.5–6 h (mode) for individuals that ingested multiple copepods. The number of copepods ingested by a chaetognath ranged from 0 to 5 and on average 2.6 copepods were consumed a day per individual. Specific daily ration in most individuals corresponded to ca. 50% of its dry weight while some individuals showed the extremes of non-feeding or voracious feeding (>200% d−1), indicating that some of the young Z. nagae had an intermittent feeding mode, which would be adaptive to save energy expenditure at low prey densities and to reduce mortality by lowering the risk of predation.

その他リンク： https://ci.nii.ac.jp/naid/130007610807

プランクトンとアウトリーチツールとしてのInstagram

下出信次

日本プランクトン学会報 65 ( 2 ) 48 - 49 2018年8月

記述言語：英語掲載種別：研究論文（研究会，シンポジウム資料等）単著

First record of Acartia japonica Mori, 1940 (Copepoda, Calanoida) from Sagami Bay, the Pacific coast of Japan

Takayama Yoshiki, Nakamura Ken-ichi, Shimode Shinji, Toda Tatsuki

Coastal Marine Science 41 ( 1 ) 11 - 14 2018年8月 [査読有り]

記述言語：英語掲載種別：研究論文（学術雑誌）共著

その他リンク： https://repository.dl.itc.u-tokyo.ac.jp/?action=pages_view_main&active_action=repository_view_main_item_detail&item_id=51218&item_no=1&page_id=28&block_id=31

Seasonal variations in microbial abundance and transparent exopolymer particle concentration in the sea surface microlayer of temperate coastal waters

Sugai Youta, Tsuchiya Kenji, Shimode Shinji, Toda Tatsuki

AQUATIC MICROBIAL ECOLOGY 81 ( 3 ) 201 - 211 2018年

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Response of phytoplankton and enhanced biogeochemical activity to an episodic typhoon event in the coastal waters of Japan

Tsuchiya Kenji, Kuwahara Victor S., Yoshiki Tomoko M., Nakajima Ryota, Shimode Shinji, Kikuchi Tomo … 全著者表示

ESTUARINE COASTAL AND SHELF SCIENCE 194 30 - 39 2017年7月

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Feeding habits of six species of euphausiids (Decapoda: Euphausiacea) in the northwestern Pacific Ocean determined by carbon and nitrogen stable isotope ratios

Sogawa Sayaka, Sugisaki Hiroya, Tadokoro Kazuaki, Ono Tsuneo, Sato Erika, Shimode Shinji, Kikuchi T … 全著者表示

JOURNAL OF CRUSTACEAN BIOLOGY 37 ( 1 ) 29 - 36 2017年1月

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Bacterial growth rate and the relative abundance of bacteria to heterotrophic nanoflagellates in the euphotic and disphotic layers in temperate coastal waters of Sagami Bay, Japan

Sugai Youta, Tsuchiya Kenji, Kuwahara Victor S., Shimode Shinji, Komatsu Kazuhiro, Imai Akio, Toda … 全著者表示

JOURNAL OF OCEANOGRAPHY 72 ( 4 ) 577 - 587 2016年8月

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Seasonal and regional change in vertical distribution and diet vertical migration of four euphausiid species (Euphausia pacifica, Thysanoessa inspinata, T-longipes, and Tessarabrachion oculatum) in the northwestern Pacific

Sogawa Sayaka, Sugisaki Hiroya, Saito Hiroaki, Okazaki Yuji, Ono Tsuneo, Shimode Shinji, Kikuchi To … 全著者表示

DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 109 1 - 9 2016年3月

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Typhoon-induced response of phytoplankton and bacteria in temperate coastal waters

Tsuchiya Kenji, Kuwahara Victor S., Hamasaki Koji, Tada Yuya, Ichikawa Tadafumi, Yoshiki Tomoko, Na … 全著者表示

ESTUARINE COASTAL AND SHELF SCIENCE 167 458 - 465 2015年12月

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

New radioisotope-free method for measuring bacterial production using [N-15(5)]-2'-deoxyadenosine and liquid chromatography mass spectrometry (LC-MS) in aquatic environments

Tsuchiya Kenji, Sano Tomoharu, Kawasaki Nobuyuki, Fukuda Hideki, Tomioka Noriko, Hamasaki Koji, Tad … 全著者表示

JOURNAL OF OCEANOGRAPHY 71 ( 6 ) 675 - 683 2015年12月

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Model tests of the buoyancy-control type ballast-free ship at sea.

Arai, M., Yoneyama, S., Quan, H., Kikuchi, T. and Shimode, S.

12th International Marine Design Conference 2015 569 - 577 2015年5月 [査読有り]

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）共著

Short-term variation in the Calanus sinicus ammonium excretion rate during the post-capture period

Kodama Taketoshi, Takahashi Kazutaka, Nakamura Ken-ichi, Shimode Shinji, Yamaguchi Takafumi, Ichika … 全著者表示

PLANKTON & BENTHOS RESEARCH 10 ( 1 ) 75 - 79 2015年3月

Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

超並列シーケンサーを用いたメタジェネティクスによるカイアシ類の群集構造解析

平井惇也, 下出信次, 栗山美樹子, 市川忠史, 日高清隆, 津田敦

日本プランクトン学会報 62 ( 1 ) 73 - 78 2015年2月

DOI

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：日本プランクトン学会共著

浮遊性カイアシ類は海洋で卓越する動物プランクトンであり，食物網や物質循環において重要な役割を果たしている(Mauchline 1998)。浮遊性カイアシ類は既知種だけで2,500種を超える多様性に富んだ生物群であり，環境変化に素早く応答することから生物多様性や環境評価を示す指標生物としてもしばしば扱われる(Humes 1994，Hays et al. 2005)。また，カイアシ類は漁獲対象魚の稚仔魚期の重要な餌料であり，環境変動に伴うカイアシ類の群集構造の変化は魚類生産とも密接に関係することが知られている(Beaugrand et al. 2002，2003)。そのため，カイアシ類の群集構造の解明は海洋の生態系を理解するために非常に重要な課題である。しかし，従来の研究は限られた地域や分類群で行われることが多かったため，広範囲に及ぶ網羅的なカイアシ類の群集構造の把握は十分になされておらず，「種数」，「各種の分布」，「分布の決定要因」という単純な疑問も十分には明らかにされてない。

その他リンク： https://ci.nii.ac.jp/naid/130007618105

浮力制御方式バラストフリー船の海水交換性能に関する洋上模型実験について

荒井誠, 若林康太, 菊池知彦, 下出信次

日本船舶海洋工学会論文集 17 177 - 184 2013年6月 [査読有り]

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Evaluation of ITS2-28S as a molecular marker for identification of calanoid copepods in the subtropical western North Pacific

Hirai Junya, Shimode Shinji, Tsuda Atsushi

JOURNAL OF PLANKTON RESEARCH 35 ( 3 ) 644 - 656 2013年5月

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Congruence between euphausiid community and water region in the northwestern Pacific: particularly in the Oyashio-Kuroshio Mixed Water Region

Sogawa Sayaka, Sugisaki Hiroya, Saito Hiroaki, Okazaki Yuji, Shimode Shinji, Kikuchi Tomohiko

JOURNAL OF OCEANOGRAPHY 69 ( 1 ) 71 - 85 2013年2月

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Distribution and life history of two planktonic copepods, Rhincalanus nasutus and Rhincalanus rostrifrons, in the northwestern Pacific Ocean.

Shimode, S., Takahashi, K., Shimizu, Y., Nonomura, T. and Tsuda, T.

Deep-Sea Research I 65 133 - 145 2012年7月 [査読有り]

記述言語：英語掲載種別：研究論文（学術雑誌）共著

istribution and life history of the planktonic copepod, Eucalanus californicus, in the northwestern Pacific: Mechanisms for population maintenance within a high primary production area.

Shimode, S., Takahashi, K., Shimizu, Y., Nonomura, T. and Tsuda, T.

Progress in Oceanography 96 ( 1 ) 1 - 13 2012年4月 [査読有り]

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Ecological behavior of the dinoflagellate Ceratium furca in Jangmok harbor of Jinhae Bay, Korea.

Baek, S.H., Shin, H.H., Choi, H.W., Shimode, S., Hwang, O.M., Shin, K., and Kim, Y.O.

Journal of Plankton Research 33 ( 12 ) 1842 - 1846 2011年12月 [査読有り]

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Meso- and microzooplankton responses to an in situ iron fertilization experiment (SEEDS II) in the northwest subarctic Pacific.

Tsuda, A., Saito, H., Machida, R. J. and Shimode, S.

Deep-Sea Research II 56 2767 - 2778 2009年12月 [査読有り]

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Life history and ontogenetic vertical migration of Neocalanus gracilis in the western North Pacific Ocean.

Shimode, S., Hirose, Y., Hidaka, K., Takahashi, K. and Tsuda, A.

Aquatic Biology 7 295 - 306 2009年12月 [査読有り]

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Growth of dinoflagellates, Ceratium furca and Ceratium fusus in Sagami Bay, Japan: The role of vertical migration and cell division

Baek Seung Ho, Shimode Shinji, Shin Kyoungsoon, Han Myung-Soo, Kikuchi Tomohiko

HARMFUL ALGAE 8 ( 6 ) 843 - 856 2009年9月 [査読有り]

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Temporal changes in chlorophyll a cocentrations and bacterial, viral, and heterotrophic nanoflagellate abundances in the coastal zone of Sagami Bay, Japan: implications of top-down and bottom-up effects

Baki, M.A., Motegi, C., Shibata, A., Fukuda, H., Shimode, S. and Kikuchi, T.

Coastal Marine Science 33 ( 1 ) 29 - 38 2009年8月

記述言語：英語掲載種別：研究論文（学術雑誌）共著

相模湾北西部における栄養塩類およびプランクトン群集の中長期的な動態.

下出信次, 白承鎬, 大曽根智暁, 菊池知彦

月刊海洋 41 ( 2 ) 86 - 97 2009年2月

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Strong bottom-up effects on phytoplankton community caused by a rainfall during spring and summer in Sagami Bay, Japan

Baek Seung Ho, Shimode Shinji, Kim Hyun-Cheol, Han Myung-Soo, Kikuchi Tomohiko

JOURNAL OF MARINE SYSTEMS 75 ( 1-2 ) 253 - 264 2009年1月

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

The influence of nutrients concentration and the ratio on phytoplankton community structure during late spring and early summer in Sagami Bay, Japan.

Baek, S.H., Shimode, S., Han S.M. and Kikuchi, T.

Algae 7 ( 6 ) 729 - 739 2008年12月 [査読有り]

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Growth of dinoflagellates, Ceratium furca and Ceratium fusus in Sagami Bay, Japan: The role of nutrients

Baek Seung Ho, Shimode Shinji, Han Myung-Soo, Kikuchi Tomohiko

HARMFUL ALGAE 7 ( 6 ) 729 - 739 2008年10月

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

相模湾真鶴港内におけるメイオベントスおよび自由生活性線虫類を用いた底質環境の評価法の有効性

寒川浩, 下出信次, 橋本隆司, 菊池知彦

日本ベントス学会誌 = Japanese journal of benthology 63 11 - 22 2008年7月

DOI

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：日本ベントス学会共著

To better understand the relationship between human-induced disturbance and the meiobenthic community in a harbor environment, sediment samples were collected at four stations (Sts. MP1 to 4) in Manazuru Port in Sagami Bay on eight occasions, approximately monthly between July, 2003, and March, 2004. Qualitative meiofaunal samples were collected by a simple cylindrical dredge. In addition, chloroplastic pigment equivalents (from October, 2003, to March, 2004), organic carbon and nitrogen content (in April and June, 2004), and grain size composition (in April, 2004) of the sediment were analyzed. Organic carbon and nitrogen were much higher at St. MP2 than at the other three stations. The sediment samples at St. MP2 frequently included dead fish and shellfish, evidently dumped from a nearby fish market. Station MP2 thus was subject to heavy organic loading. Multivariate community structure analyses using only higher taxonomic levels (phylum, order and/or class) of the meiobenthos did not show significant differences among the stations and sampling months. In contrast, based on species and feeding-types of nematodes, a distinct sample group form St. MP2 was revealed by multidimensional scaling (MDS) and cluster analyses. R-type analysis of the species association of dominant nematodes and correspondence analysis of dominant species and feeding-types of nematodes both also clearly showed the distinctness of the sample group from this station, which mainly consisted of facultative predators collected exclusively there. These results suggest that two species of facultative predators, Meyersia sp. and Metaparoncholaimus sp. belonging to the family Oncholaimidae, and four other nematode species are good indicators of a harbor environment affected by heavy organic loading.

その他リンク： https://ci.nii.ac.jp/naid/10027166902

Population development of the dinoflagellates Ceratium furca and Ceratium fusus during spring and early summer in Iwa harbor, Sagami Bay, Japan

Baek, S.H., Shimode, S., Han, M.S. and Kikuchi, T.

Ocean Science Journal 43 ( 1 ) 49 - 59 2008年4月 [査読有り]

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Growth of dinoflagellates, Ceratium furca and Ceratium fusus in Sagami Bay, Japan: The role of temperature, light intensity and photoperiod

Baek Seung Ho, Shimode Shinji, Kikuchi Tomohiko

HARMFUL ALGAE 7 ( 2 ) 163 - 173 2008年2月

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Reproductive Ecology of the Dominant Dinoflagellate, Ceratium fusus, in Coastal Area of Sagami Bay, Japan

Baek Seung Ho, Shimode Shinji, Kikuchi Tomohiko

Journal of oceanography 63 ( 1 ) 35 - 45 2007年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Oceanographic Society of Japan 共著

その他リンク： https://ci.nii.ac.jp/naid/10018463422

Reproductive ecology of the dominant dinoflagellate, Ceratium fusus, in coastal area of Sagami Bay, Japan

Baek, SH; Shimode, S; Kikuchi, T

JOURNAL OF OCEANOGRAPHY 63 ( 1 ) 35 - 45 2007年2月

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

生態リスクマネジメントの基本手順と事例比較

松田裕之・浦野紘平，Axel Rossberg，小池文人，雨宮隆，牧野光琢，森野真理，久保隆，下出信次，中井里史，加藤峰夫，茂岡忠義

生物科学 58 41 - 47 2006年7月

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Reproductive ecology of dominant dinoflagellate, Ceratium furca, in the coastal area of Sagami Bay

Baek Seung Ho, Shimode Shinji, Kikuchi Tomohiko

Coastal marine science ( 30 ) 344 - 352 2006年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：東京大学共著

Reproductive ecology of dinoflagellate, Ceratium furca, was studied in the coastal area of Sagami Bay. Field samplings and laboratory experiments were conducted to investigate seasonal changes of the field population and effects of temperature, salinity and irradiance on the growth rate of C. furca. Abundance of the species increased significantly from April to September and was decreased in November. In particular, the population increased during the spring when the water column was weakly stratified and relatively low nutrient conditions were observed in the surface layer. High growth rates of C. furca were observed at the conditions of 20-28℃, 17-34 PSU and 216-800μEm^<-2>s^<-1> with the highest growth rate (μ=0.72d^<-1>) being observed at 24℃, 30 PSU and 600μEm^<-2>s^<-1>. In addition, the growth rates increased gradually with increasing irradiance from 58 to 216μEm^<-2>s^<-1> in the all salinity conditions, and afterwards the rates reached plateaus between 216 and 796μEm^<-2>s^<-1>. The field survey and laboratory experiments indicated that the species is distributed throughout the year and adapted to a wide-range of environmental fluctuations such as water temperature, salinity, irradiance and nutrients. These specific characteristics make C. furca one of the dominant dinoflagellates in the coastal area.

その他リンク： https://ci.nii.ac.jp/naid/110004782877

Reproductive strategy of Acartia steueri in Sagami Bay, Japan

Onoue Yasuko, Shimode Shinji, Toda Tatsuki, KIKUCHI Tomohiko

Coastal marine science ( 30 ) 353 - 359 2006年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：東京大学共著

Reproduction, hatching success and population dynamics of the dominant copepod Acartia steueri were studied in Sagami Bay, Japan from February 2002 to December 2003. A. steueri occurred through the year in the water column, and it produced physiologically different eggs, subitaneous and diapausing. Subitaneous eggs were produced through the experimental period, whereas diapausing ones were restricted from February to August in both years. Population egg production rate (EPR) increased with the abundance of adult males and females from February and reached maximum in June. However, planktonic population of A. steueri did not increase during summer to winter because diapausing eggs occupied a great part of their reproduction (～98%). Recruitment rates in October to December 2002 and September 2003 were higher than population EPR, implying that diapausing eggs of A. steueri had a key role to support the recruitment into water column when the reproductive ability of the population diminished rather than to contribute to an increase of the planktonic population rapidly in their favorable seasons.

その他リンク： https://ci.nii.ac.jp/naid/110004782878

相模湾真鶴半島の海産自由生活性線虫類について

橋本隆司, 下出信次, 菊池知彦

国立科学博物館専報 ( 41 ) 209 - 215 2006年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：国立科学博物館共著

Free-living nematodes were studied at three stations in the shallow area off Manazuru Peninsula in Sagami Bay. 13,423 specimens were collected and 121 species (of 32 families) were identified besides 24 unidentified species. Trefusiidae gen. sp. was the most dominant species in the study area, especially at the shallowest station. On the other hand, Odontanticoma sp., the second dominant species in the study area, was abundant at the deepest station. The species such as Odontophora sp. and Rhabdodemania sp. distributed abundantly at the middle depth Station may depend on epiphytic environment.

その他リンク： https://ci.nii.ac.jp/naid/110005998868

Diel vertical migration and life strategies of two phytal-dwelling harpacticoids, Ambunguipes rufocincta and Eudactylops spectabilis

Shimode Senji, Shirayama Yoshihisa

Plankton & benthos research 1 ( 1 ) 42 - 53 2006年2月

DOI

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：日本プランクトン学会、日本ベントス学会共著

Seasonal occurrence, diel vertical migration (DVM), biomass (dry weight, carbon and nitrogen contents), growth and behavior of the two phytal-dwelling harpacticoid copepods, Ambunguipes rufocincta and Eudactylops spectabilis, were investigated using field samplings and laboratory experiments. The field samplings were conducted at a subtidal station (St. M; ca. 6.5 m depth) in Tanabe Bay, Japan from March 1999 to January 2000. The results from the field revealed that the two species performed DVM between the water column and macroalgal beds of Colpomenia sinuosa (brown algae), and the seasonal occurrence of the two species at St. M were almost identical to that of C. sinuosa, which bloomed only between December and May. The carbon/nitrogen ratios of A. rufocincta (5.00±0.60) and E. spectabilis (3.95±0.66) differed, probably due to the differences in their foods. Laboratory incubation showed that E. spectabilis needed both C. sinuosa and sediments as food for growth, whereas A. rufocincta that was fed only with the macroalgae was able to grow to maturity. Our results suggested that their DVM behaviors of both species were related to the dispersal of copepodids and adults, because 1) the nauplii grew on C. sinuosa, 2) their main food items were C. sinuosa and sediments, and 3) mating might not be the main purpose of the DVM since females with egg sacs emerged into the water column. Moreover, in later field investigations during summer, refuge populations of A. rufocincta were collected from the seagrass Halophila ovalis in an area shallower than St. M, indicating that A. rufocincta might sustain its population by moving to different habitats though the DVM behavior and changing food items from C. sinuosa to H. ovalis during summer. Therefore, at least for A. rufocincta, the DVM behavior might be indispensable in their life strategy for sustaining their population year round.

その他リンク： https://ci.nii.ac.jp/naid/10017410931

Spatio-temporal changes in diversity and community structure of planktonic copepods in Sagami Bay, Japan

Shimode S, Toda T, Kikuchi T

MARINE BIOLOGY 148 ( 3 ) 581 - 597 2006年1月

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

A guideline for ecological risk management procedures

Rossberg, A.G., Matsuda, H., Koike, F., Amemiya, T., Makino, M., Morino, M., Kubo, T., Shimoide, S. … 全著者表示

Landscape and Ecological Engineering 1 ( 2 ) 221 - 228 2005年11月 [査読有り]

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Effects of raised CO2 concentration on the egg production rate and early development of two marine copepods (Acartia steueri and Acartia erythraea)

Kurihara H, Shimode S, Shirayama Y

MARINE POLLUTION BULLETIN 49 ( 9-10 ) 721 - 727 2004年11月

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Sub-lethal effects of elevated concentration of CO2 on planktonic copepods and sea urchins

Kurihara H, Shimode S, Shirayama Y

JOURNAL OF OCEANOGRAPHY 60 ( 4 ) 743 - 750 2004年8月

Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Diel changes in vertical distribution of copepods community in Tanabe Bay, Japan

Shimode S, Shirayama Y

JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM 84 ( 3 ) 607 - 615 2004年6月

Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

夜間水柱内に出現する葉上性ハルパクチコイダ類２種の日周鉛直移動

下出信次, 白山義久

大槌臨海研究センター研究報告 28 13 - 13 2003年3月

記述言語：英語掲載種別：研究論文（大学，研究機関紀要）共著

Ryocalanus spinifrons, a new species of Ryocalanidae (Copepoda : Calanoida), from the southwestern part of Sagami Bay, Japan

Shimode S, Toda T, Kikuchi T

HYDROBIOLOGIA 432 ( 1-3 ) 127 - 133 2000年8月

Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

相模湾真鶴半島周辺海域に出現するカイアシ類(Crustacea, Maxillopoda)

下出信次, 戸田龍樹, 菊池知彦

横浜国立大学教育人間科学部理科教育実習施設研究報告 ( 11 ) 1 - 11 1998年3月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：横浜国立大学教育人間科学部附属理科教育実習施設共著

Ninety species (including 21 unidentyfied and 2 copepodite species) of pelagic copepods (Crustacea, Maxillopoda) from the monthly sampling at station M off Manazuru Peninsula in the northwestern part of Sagami Bay. These species were categorized into 12 seasonal occurrence patterns.

その他リンク： https://ci.nii.ac.jp/naid/110006151586

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