Journal Article

Proposal for stock-recruitment relationship for Japanese sardine Sardinops melanostictus in North-western Pacific

Shimoyama, S.(Survey Research Center Co., Ltd., Tokyo (Japan)), Suzuki, N, Sakuramoto, K

2007

Overview

:  This study assessed the stock‐recruitment relationship (SRR) for the Japanese sardine Sardinops melanostictus in the North‐western Pacific. Of the 20 SRR models investigated, the Akaike information criterion (AIC) was the minimum (AIC = 551.2) when the data were separated into two groups (A and B) and the log‐normal distribution was applied as the error term. Group A was constructed with SRR data from 1976–1987 and 1992–2004. Group B consisted of data from 1988–1991. The AIC minimum model was R = 22.8 S × eε for Group A, where R, S, and ε denote the recruitment of sardine (individual number of 0‐year old fish), spawning stock biomass (SSB), and error term, respectively. This model indicated that recruitment was proportional to the SSB and that no density‐dependent effect operated over the range of SSB investigated (51 000–11.3 million t). Recruitment was markedly higher (lower) when the sea surface temperature (SST) of the Kuroshio Extension area in February was low (high). The essential SRR can simply be expressed as R = 22.8 S × eε with the level of recruitment deviating from the model to a greater or lesser degree depending on the environmental conditions.

• Publisher: Blackwell Publishing Asia,Springer Nature B.V
• Subject: biomass / density dependence / Environmental conditions / environmental factors / EVALUACION DE POBLACIONES ICTICAS / EVALUATION DES STOCKS / FISHERY RESOURCES / lognormal distribution / Marine / MATHEMATICAL MODELS / MODELE MATHEMATIQUE / MODELOS MATEMATICOS / NORTHWEST PACIFIC / PACIFICO NOROESTE / PACIFIQUE NORD-OUEST / PERFORMANCE DE REPRODUCTION / Recruitment / RECURSOS PESQUEROS / REPRODUCTIVE PERFORMANCE / REPRODUCTIVIDAD / RESSOURCE HALIEUTIQUE / RPS / sardine / sardines / Sardinops / SARDINOPS MELANOSTICTUS / Sea surface temperature / Spawning / spawning stock biomass / SST of Kuroshio Extension / STOCK ASSESSMENT / stock-recruitment relationship / Studies / surface water temperature