Variation in ocean colour may help predict cod and haddock recruitment

Marine Ecology Progress Series

Trevor Platt¹  Emmanuel Devred¹  M. Kurtis Trzcinski¹  Shubha Sathyendranath¹ 

关键词: Recruitment;    Phytoplankton bloom;    Diatom bloom;    Ocean satellite imagery;    NAO;    Cod;    Gadus morhua;    Haddock;    Melanogrammus aeglefinus;   

DOI  :  10.3354/meps10451

学科分类：海洋学与技术

来源: Inter-Research

【 摘 要 】

ABSTRACT: Characteristics of the spring and fall phytoplankton blooms in spawning areas on the Scotian Shelf, Canada, were estimated from remote sensing data. These blooms, along with anomalies in the North Atlantic Oscillation, were used to explain variation in the recruitment of 4 populations of cod and haddock. We tested the effects of the timing of the bloom using the chlorophyll a (chl a) signal, the maximum amount of chl a, the timing of the diatom bloom, and the maximum relative dominance of diatoms on the recruitment (to Age 1) of cod and haddock on the Scotian Shelf. Models were run separately for the effects of the spring and fall blooms. Only 3 of 10 models tested (0-lag) explained significant (80 to 92%) variation in recruitment. However, the performance of these models was not consistent across populations or species, suggesting that generalities about how spring and fall phytoplankton blooms affect recruitment cannot yet be made. The differences among models suggest that fish larvae are probably adapted locally to food production and thus indirectly to the characteristics of the phytoplankton bloom, which in turn are influenced by regional (meso-scale) oceanographic conditions.

【 授权许可】

Unknown