期刊
FISHERIES MANAGEMENT AND ECOLOGY
卷 16, 期 6, 页码 492-500出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1365-2400.2009.00703.x
关键词
climate change; fish; long-term studies; population regulation; re-oligotrophication; zooplankton
类别
资金
- CIPEL (Commission Internationale pour la Protection des Eaux du Leman)
P>Analysis of long-term catches from the deep peri-alpine Lake Geneva, showed a shift in the stock-recruitment relationship of Coregonus lavaretus (L.), a target species of commercial fishing. This change was mainly related to large-scale meteorological factors. Higher spring water temperatures may have improved larval survival and hence recruitment of whitefish via: (1) a better match between the hatching date of whitefish larvae and development of their zooplankton prey; and (2) the positive temperature effect on larval growth. In Lake Geneva, changes in regulatory mechanisms coupled with stocking and improved water-quality have led to an explosion in the C. lavaretus population in recent years. These results highlight the relevance of long-term changes in the stock-recruitment relationship for management of aquatic ecosystems that are sensitive to climate forcing.
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