|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences >
Peer-reviewed Journal Articles, etc >
Summer diet and feeding strategy of Pacific cod (Gadus macrocephalus) inhabiting the southern coast of Hokkaido, Japan
| Title: | Summer diet and feeding strategy of Pacific cod (Gadus macrocephalus) inhabiting the southern coast of Hokkaido, Japan |
| Authors: | Wang, Rongfu Browse this author | | Chimura, Masayuki Browse this author | | Sadayasu, Kazuhiro Browse this author | | Ishino, Mitsuhiro Browse this author →KAKEN DB | | Yamamura, Orio Browse this author →KAKEN DB |
| Keywords: | Pacific cod | | stomach contents | | diet composition | | feeding strategy | | Hokkaido |
| Issue Date: | 5-Dec-2023 |
| Publisher: | Landes Bioscience |
| Journal Title: | Marine biology research |
| Volume: | 18 |
| Issue: | 7-8 |
| Start Page: | 435 |
| End Page: | 447 |
| Publisher DOI: | 10.1080/17451000.2022.2147948 |
| Abstract: | The ontogenetic and interannual variations in the diet and feeding strategy of Pacific cod (Gadus macrocephalus) were examined based on 1302 specimens collected by a trawling net off the southern coast of Hokkaido from late June to early July during 2016-2020. The diet comprised 63 species (13 taxa). Fish was the most important prey, followed by decapod crustaceans. In 2016, walleye pollock (Gadus chalcogrammus) was the dominant fish prey species, while amphipods, decapods and Japanese lanternfish (Notoscopelus japonicus) were prominent in the diet in 2017. Japanese sardine (Sardinops melanostictus) were more predominant during 2018-2020. An ontogenetic comparison of diet indicated that smaller individuals (<= 400 mm standard length, SL) preyed mainly on small prey items, such as decapod crustaceans and polychaetes, whereas larger individuals (>400 mm SL) preyed mainly on fish. Moreover, prey size exhibited a significant increasing trend with predator body length. These results suggest that Pacific cod has a flexible feeding strategy that differs by life stage. The updated information on predator-prey relationships provided herein improves our understanding of energy flow in the marine ecosystem and could facilitate ecosystem-based fishery management strategies. |
| Rights: | This is an Accepted Manuscript of an article published by Taylor & Francis in Marine biology research on 05 December 2022, available online: http://www.tandfonline.com/10.1080/17451000.2022.2147948. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/90823 |
| Appears in Collections: | 水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 山村 織生
|
