Interannual variability of the reproductive strategy of the peruvian anchovy off northern-central peru Report as inadecuate




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B Buitrón ; A Perea ; C Peña ; C Espinoza ;Ciencias Marinas 2011, 37 (4B)

Author: J Mori

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Ciencias Marinas ISSN: 0185-3880 cmarinas@uabc.mx Universidad Autónoma de Baja California México Mori, J; Buitrón, B; Perea, A; Peña, C; Espinoza, C Interannual variability of the reproductive strategy of the Peruvian anchovy off northern-central Peru Ciencias Marinas, vol.
37, núm.
4B, 2011, pp.
513-525 Universidad Autónoma de Baja California Ensenada, México Available in: http:--www.redalyc.org-articulo.oa?id=48021256002 How to cite Complete issue More information about this article Journals homepage in redalyc.org Scientific Information System Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Non-profit academic project, developed under the open access initiative Ciencias Marinas (2011), 37(4B): 513–525 Interannual variability of the reproductive strategy of the Peruvian anchovy off northern-central Peru C M Variabilidad interanual en la estrategia reproductiva de la anchoveta peruana en la región norte-centro del litoral del Perú J Mori*, B Buitrón, A Perea, C Peña, C Espinoza Instituto del Mar del Perú (IMARPE), Esq.
Gamarra y Valle s-n Chucuito, Callao, Perú. * Corresponding author.
E-mail: jmori@imarpe.pe ABSTRACT.
In this paper we analyze the standardized monthly anomalies of time series of the gonadosomatic index (GSI, 1986–2008), spawning fraction (SF, estimated by histological analysis of gonads, 1992–2008), and condition factor (1986–2008) of the Peruvian anchovy Engraulis ringens.
Statistical analysis using filters showed, according to their mode of variability, the existence of three distinct periods for GSI (1986–1989, 1990–2000, and 2001–2008) and two for SF (1995–2001 and 2002–2008).
Based on this, we built monthly GSI and SF patterns for each period, which showed marked and prolonged seasonal reproductive activity.
The patterns found have been interpreted as changes in reproductive strategy.
The condition factor showed no significant differences throughout the study period...





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