Model for stock-recruitment dynamics of the Peruvian anchoveta (Eugraulis ringens) off Peru

Singh, Ashneel and Sakuramoto, Kazumi and Suzuki, Naoki and Singh, Ashneel A. (2014) Model for stock-recruitment dynamics of the Peruvian anchoveta (Eugraulis ringens) off Peru. Agricultural Sciences, 5 (2). pp. 140-151. ISSN 2156-8553

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Abstract

This paper was aimed at re-examining the validity
of the results from Cahuin et al. (Estuar.
Coast. Shelf Sci. 84, 2009) and identify a model
to describe the stock-recruitment relationship of
the Peruvian anchoveta (Eugraulis ringens). Regression
analysis was used to determine if density-
dependent effects were present. The analysis
did not show the existence of any densitydependent
effects. It is important to use environmental
factors and take observational and
process errors into account when attempting to
identify density-dependent effects in fish populations.
Sea surface temperature (SST) and Southern
Oscillation Index (SOI) were used as independent
variables to fit the recruitment dynamics
of the anchoveta. Both SST and SOI
were found to be significantly important parameters
in structuring anchoveta dynamics according
to Akaike Information Criterion (AIC)
and R2 values. The results of this study do not
correlate with the findings of Cahuin et al., (2009),
where density-dependent effects and the presence
of regimes were detected. In conclusion, the recruitment
Rt is essentially determined in proportion
to spawning stock biomass St, and then environmental
factors in year t further change the
recruitments. This mechanism is completely same
with that for Japanese sardine proposed by Sakuramoto
(The Open Fish. Sci. 5, 2012).

Item Type:	Journal Article
Uncontrolled Keywords:	Anchoveta; Density-Dependent; Recruitment; Regimes; Reproductive Success; Sea Surface Temperature; Southern Oscillation Index; Spawning Stock Biomass
Subjects:	Q Science > Q Science (General) > Q1-390 Science (General) Q Science > QH Natural history > QH301 Biology Q Science > QL Zoology S Agriculture > SH Aquaculture. Fisheries. Angling
Divisions:	School of Agriculture, Geography, Environment, Ocean and Natural Sciences (SAGEONS)
Depositing User:	Ashneel Singh
Date Deposited:	06 Aug 2025 23:57
Last Modified:	06 Aug 2025 23:57
URI:	https://repository.usp.ac.fj/id/eprint/15078

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