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Regime shifts and recruitment dynamics of snow crab, Chionoecetes opilio, in the eastern Bering Sea
Author(s) -
Szuwalski Cody,
Punt André E.
Publication year - 2013
Publication title -
fisheries oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 80
eISSN - 1365-2419
pISSN - 1054-6006
DOI - 10.1111/fog.12026
Subject(s) - snow , pelagic zone , oceanography , advection , fishery , haddock , environmental science , climate change , ecology , biology , fish <actinopterygii> , geography , geology , meteorology , physics , thermodynamics
Shifts in climate regime are prominent features of the physical environment of the eastern Bering Sea and in recent years have been documented in approximately 1977 and 1989. Average snow crab ( Chionoecetes opilio ) recruitment decreased sharply after the 1989 fertilization year. Models in which control of snow crab recruitment shifts between drivers dependent on climate ‘regime’ are presented. These models are evaluated using cross‐validation and retrospective analysis, both of which indicate that the relationships are relatively robust to varying levels of information. Larval survival as influenced by food availability in the pelagic phase and advection to suitable nursery grounds are the hypothesized mechanisms driving recruitment dynamics.