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      Variabilidad interanual en la estrategia reproductiva de la anchoveta peruana en la región norte-centro del litoral del Perú Translated title: Interannual variability of the reproductive strategy of the Peruvian anchovy off northern-central Peru

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          Abstract

          En el presente trabajo se analizan las anomalías mensuales estandarizadas de las series temporales del índice gonadosomático (IGS, de 1986 a 2008), la fracción desovante (FD, estimada con análisis histológicos de gónadas de 1992 a 2008) y el factor de condición (de 1986 a 2008) de la anchoveta peruana, Engraulis ringens. El análisis mediante filtros estadísticos mostró, de acuerdo a sus modos de variabilidad, la existencia de tres periodos distintos para el IGS (1986-1989, 1990-2000 y 2001-2008) y dos para la FD (1995-2001 y 20022008). Sobre esta base se construyeron patrones a escala mensual de IGS y FD correspondientes a cada periodo, los cuales mostraron una marcada estacionalidad y prolongada actividad reproductiva. Los distintos patrones encontrados se interpretan como cambios de estrategia reproductiva. El factor de condición no registró diferencias significativas a lo largo del periodo estudiado. Se discuten los cambios producidos dentro de estos periodos como parte de la estrategia reproductiva de la anchoveta y sus implicaciones en las medidas de manejo pesquero.

          Translated 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. We discuss changes in these periods and their implications for fisheries management measures.

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                ciemar
                Ciencias marinas
                Cienc. mar
                Universidad Autónoma de Baja California, Instituto de Investigaciones Oceanológicas (Ensenada )
                0185-3880
                December 2011
                : 37
                : 4b
                : 513-525
                Affiliations
                [1 ] Instituto del Mar del Perú Peru
                Article
                S0185-38802011000500002
                27c05d29-f807-478b-b6e9-bb282fe97d2c

                http://creativecommons.org/licenses/by/4.0/

                History
                Categories
                Marine & Freshwater Biology

                Ecology
                Engraulis ringens,anchovy reproductive strategy,fisheries management,anchoveta,estrategia reproductiva,manejo pesquero

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