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Synchronous patterns of fluctuations in two stocks of anchovy Engraulis ringens Jenyns, 1842 in the Humboldt Current System

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Most of the studies investigating synchrony in fluctuations of abundance of small pelagic fish have been based on catch
data only, which do not describe the dynamics of populations as a relative abundance index. In this paper, catch, biomass, recruitment and recruitment rate, were used to compare synchronous changes for two stocks of anchovy (Engraulis ringens) from 1982 to 2004. One is the North Central Peru stock (NCP) and the other is the shared South
Peru-Northern Chile stock (SPNC). Correlation analysis demonstrated a significant association between population
time series, particularly during the growing phase of the stocks. Thus, the synchronous fluctuation pattern of the two
stocks is due to the recovery phase and probably driven by density-independent effects of simultaneous favorable environmental conditions occurring in the two regions. The conclusions were: (i) both NCP and SPNC anchovy stocks are in an overall positive phase of synchrony, (ii) higher correlations in the synchronous pattern of fluctuations occurred during simultaneous increase of biomass, and (iii) short-term fluctuations were negative when the abundance of the stock was lower and/or impacted by El Ni~no events.

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Ketersediaan

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Informasi Detail

Judul Seri

J. Appl. Ichthyol

No. Panggil

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Penerbit

Chile : Blackwell Verlag GmbH., 2014

Deskripsi Fisik

J. Appl. Ichthyol. 2015

Bahasa

English

ISBN/ISSN

doi: 10.1111/jai.126

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

31 (2015), 45–50

Subjek

PERIKANAN

Info Detail Spesifik

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Pernyataan Tanggungjawab

Mutia/Agus

Versi lain/terkait

Lampiran Berkas

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