The University of Tokyo · 환경과학
이 교수의 연구실은 북서태평양의 해양 생태계와 어류 자원의 변화를 이해하기 위해 생태계 기반 생물에너지 모델링, 환경 DNA 분석, 그리고 기후 변화 영향 평가를 융합한 연구를 수행합니다. 주로 태평양 사시이, 쭈매운지 등 소형 수영성 어류의 생태적 반응과 기후 변화에 따른 생존 및 번식 성패 메커니즘을 해양 환경 요인과 연계해 분석합니다. 특히, 어린 시절의 수온 기록을 오트골 안정성 산소 동위원소 비율을 통해 추정하는 기술을 응용해 어획 성패 예측 모델을 구축하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Abstract A fish bioenergetics model coupled with an ecosystem model was developed to reproduce the growth of Pacific saury. The model spatially covers three different oceanographic spatial domains corresponding to the Kuroshio, Oyashio, and interfrontal (mixed water) regions. In this coupled model, three (small, large, and predatory) zooplankton densities which were derived from the lower trophic level ecosystem model were input to the bioenergetics model of saury as the prey densities. Although
Environmental DNA (eDNA) is increasingly used to noninvasively monitor aquatic animals in freshwater and coastal areas. However, the use of eDNA in the open ocean (hereafter referred to OceanDNA) is still limited because of the sparse distribution of eDNA in the open ocean. Small pelagic fish have a large biomass and are widely distributed in the open ocean. We tested the performance of two OceanDNA analysis methods-species-specific qPCR (quantitative polymerase chain reaction) and MiFish metaba
Abstract Ito, S-I., Okunishi, T., Kishi, M. J., and Wang, M. 2013. Modelling ecological responses of Pacific saury (Cololabis saira) to future climate change and its uncertainty. – ICES Journal of Marine Science, 70: 980–990. An ecosystem-based bioenergetics model was used to investigate the responses of Pacific saury (Cololabis saira) to global warming. The model was forced by the projected sea surface temperature (SST) generated by climate models that formed the bases for the Intergovernmental
Abstract Available evidence of recent climate‐induced physical and chemical changes in the oceans is summarized, including changes in sea temperatures, nutrient supply, mixing and circulation, trace element supply, acidification, and sea‐level rise. The biological responses in the marine environment to these documented physical changes are then presented by trophic level. Our ability to project ecosystem responses to likely future global change is discussed, including numerous examples of existi
Abstract The comprehensive study of the variation of the oceanic environment and fish populations in the northwestern Pacific (VENFISH) was an interdisciplinary scientific program to enhance our understanding of relationships between the ocean environment and the pelagic fishes, Pacific saury and walleye pollock. As prey of saury and walleye pollock, key species of zooplankton were selected and their life history and production were elucidated. Retrospective analyses were also conducted to inves
To determine the temperature history of early life stages of chub mackerel (Scomber japonicus), otolith stable oxygen isotope ratios (δ18Ootolith) of larval and juvenile fish collected in the Kuroshio–Oyashio transition area during 2004–2015 were analyzed, and experienced temperatures were estimated accordingly. The δ18Ootolith values decreased with otolith growth during the larval stage, whereas those for juveniles were positively correlated with otolith radius and increased with increasing oto
