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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences >
Peer-reviewed Journal Articles, etc >
Weight-based yield per recruitment and spawning-biomass per recruitment analyses of Pacific cod Gadus macrocephalus off the Pacific coast of southern Hokkaido, Japan
| Title: | Weight-based yield per recruitment and spawning-biomass per recruitment analyses of Pacific cod Gadus macrocephalus off the Pacific coast of southern Hokkaido, Japan |
| Authors: | Ueda, Yuji Browse this author | | Matsuishi, Takashi2 Browse this author →KAKEN DB |
| Authors(alt): | 松石, 隆2 |
| Keywords: | Gadus macrocephalus | | Pacific cod | | SPR (spawning-biomass per recruitment) | | weight-based | | YPR (yield per recruitment) | | stock assessment |
| Issue Date: | Aug-2005 |
| Publisher: | Blackwell Publishing |
| Journal Title: | Fisheries Science |
| Volume: | 71 |
| Issue: | 4 |
| Start Page: | 799 |
| End Page: | 804 |
| Publisher DOI: | 10.1111/j.1444-2906.2005.01030.x |
| Abstract: | The present study assessed the stock state of Pacific cod Gadus macrocephalus caught off the coast of southern Hokkaido, Japan. Weight-based yield per recruitment (YPR) and spawning-biomass per recruitment (SPR) analyses were used for this assessment. The current fishing mortality (average from 1998 to 2000) was 0.65 and weight at first capture was 0.5 kg bodyweight. Under these fishing pressures, the YPR of Pacific cod in southern Hokkaido was 1.06 kg/recruitment and percentage of SPR (%SPR) was 6.9%. The %SPR was lower than the critical limit at 20%SPR. The main reason that values of both YPR and %SPR were not optimum, would be that the weight at first capture was too small. Raising the weight at first capture was thought to be a better strategy from the biological viewpoint, and reducing fishing mortality to 0.3 would be the next alternative strategy from the fisheries management viewpoint. |
| Rights: | © 2005 公益社団法人日本水産学会 | | © 2005 The Japanese Society of Fisheries Science |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/616 |
| 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)
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Submitter: 松石 隆
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