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Climate-related variability and stock - recruitment relationship of the North Pacific Albacore tuna

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Singh A. A., Sakuramoto K., Suzuki N., Alok K.

Polish Journal of Natural Sciences

2018

tom 33

nr 1

The stock-recruitment relationship is biological in nature and it is evident that one affects the other. However, fish life cycle, growth, abundance and distribution is dependent on a complex relation with various biotic and abiotic variables inclusive of environmental factors. The stock-recruitment relationship and environmental influences was investigated for the North Pacific albacore tuna (Thunnus alalunga). Statistical investigation revealed the presence of different density-dependent effects in the relationships of recruits per spawning biomass (RPS) and recruitment (R) against the female spawning stock biomass (SSB). Significant relationship of R, RPS and SSB were determined with the sea surface temperature (SST), Pacific Decadal Oscillation (PDO) and multivariate El Niño Southern Oscillation (ENSO), with SST being the principal variable. This makes the stock recruitment behavior multidimensional. The results suggest significant influence of the environmental conditions on the stock recruitment relationship of the North Pacific albacore tuna including a possible regime shift

Ograniczanie wyników

1 Polish Journal of Natural Sciences

1 Alok K.

1 Sakuramoto K.

1 Singh A. A.

1 Suzuki N.

1 2018

Wyniki wyszukiwania

Climate-related variability and stock - recruitment relationship of the North Pacific Albacore tuna