期刊
ICES JOURNAL OF MARINE SCIENCE
卷 68, 期 7, 页码 1525-1534出版社
OXFORD UNIV PRESS
DOI: 10.1093/icesjms/fsr075
关键词
exploitation pattern; exploitation rate; fisheries management; ICES; meta-analysis; spawn-at-least-once; sustainability
资金
- Greek State Scholarship Foundation
- Public Benefit Foundation Alexander S. Onassis
- University of Aberdeen
The spawn-at-least-once principle suggests that sustainability is secured if fish become vulnerable to commercial gears only after they have spawned. However, some studies suggest that protecting immature fish is not essential to sustainability because extrinsic factors determine both recruitment and stock status. A meta-analysis was conducted to quantify the independent effects of exploitation pattern and exploitation rate on current stock status. The analysis used empirical data for 38 fish stocks of 13 species in the NE Atlantic. Two metrics of exploitation pattern were used and their sensitivity was compared. As expected, exploitation rate had a significant negative effect on current stock status. Exploitation patterns associated with high proportional fishing mortality of immature fish also had a significant negative effect on current stock status, providing empirical support for the spawn-at-least-once principle. When the fishing mortality of immature fish exceeds half that of mature fish, stock status falls below precautionary limits. Our results suggest that a sensitive metric of exploitation pattern could provide useful information about an aspect of exploitation that is currently overlooked by fisheries management regimes that focus primarily on exploitation rate.
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