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Variación interanual de la estructura de tallas y aspectos reproductivos del camarón pink (Farfantepenaeus brevirostris) en el Pacífico colombiano

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Artículo 45 (2) 253-268
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Author
Girón-Montaño, Alexander
Rueda, Mario
Eraso Ordoñez, Jessica Franeive
Rodríguez-Jiménez, Alfredo
Date
2016

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Alternative Title
Interannual variation of size structure and reproductive aspects of the pink shrimp (Farfantepenaeus brevirostris) in the Colombian Pacific Coast.
Abstract
La pesquería del camarón de aguas profundas (CAP) constituye un recurso de gran importancia económica y social para el Pacífico colombiano. Farfantepenaeus brevirostris (camarón pink) es el principal recurso que sustenta esta pesquería; no obstante, la información reproductiva y el efecto de la pesca sobre la estructura de tallas con implicaciones de manejo, no se ha documentado en años recientes para este recurso. El objetivo del presente estudio fue analizar la variación interanual de la estructura de tallas y aspectos reproductivos de F. brevirostris, para lo cual se muestrearon 45 lances en tres monitoreos a bordo de la flota industrial de arrastre del CAP por año entre 2009 y 2015. En cada lance se registraron in situ las características morfométricas y el estado de madurez de 20262 individuos. 56.2% de los individuos colectados fueron hembras; sin embargo, la relación hembras: machos de 1:0.8 no fue significativa. El ámbito de tallas capturado por la flota difirió entre sexos y entre años, mostrando que las hembras fueron más grandes (50 a 200 mm de longitud total) que los machos (75 a 170 mm). En este sentido, las hembras mostraron mayor talla media de captura en 2012 (128.04 mm) y menor en 2011 (TMC = 114.9 mm), mientras que los machos fueron más grandes en 2011 (TMC = 166.6 mm) y más pequeños en 2015 (TMC = 106.3 mm). La función de madurez tuvo un patrón diferente entre sexos y una variabilidad constante en las curvas de madurez entre años, lo cual implicó estimar la talla media de madurez (TMM) para F. brevirostris con base en una curva media de siete años (TMM para hembras = 130.6 mm y TMM para machos = 83.2 mm). La estructura de tallas obtenida y las curvas de madurez, indicaron que las hembras son más susceptibles a la pesca (entre 66% y 94% de individuos inmaduros en las capturas). Sin embargo, las capturas reflejan que solo 1% a 32% de los machos son inmaduros, lo cual posibilita una estrategia de éxito reproductivo de la población para contrarrestar el efecto de la pesca. Se sugiere mayor control sobre la selectividad del arte de pesca y la puesta en marcha de vedas espaciotemporales para el manejo y conservación del recurso
The fishery of the deep water shrimp is a resource of great economic and social importance for the Colombian Pacific Coast. Farfantepenaeus brevirostris (pink shrimp) is the target resource supporting this fishery; however, reproductive information and the fishing effect on size structure with management implications, has not been documented in recent years. The aim of this study was to analyze the variation in size structure and reproductive aspects of F. brevirostris, therefore 45 hauls were sampled in three onboard fishery monitoring of the industrial trawl fleet per year, between 2009 and 2015. In each haul in situ morphometric characteristics and sexual maturity of 20262 individuals were recorded. 56.2% of individuals collected were females, however the ratio female: male of 1:0.8 was not significant. The size range caught by the fishing fleet did differ between sexes and years, showing that females were larger (50 mm and 200 mm in total length) than males (75 mm to 170 mm). In this regards, females showed the highest mean catch size in 2012 (128.04 mm) and the lowest in 2011 (114.9 mm), while males were larger in 2011 (166.6 mm) and smaller in 2015 (106.3 mm). The maturity function had a different pattern between sexes and constant variability in maturity curves among years, which meant estimating the average size at maturity (TMM) for F. brevirostris based on an average curve of seven years (TMM females = 130.6 mm and TMM males = 83.2 mm). The size structure obtained and maturity curves indicated that females are more susceptible to fishing (between 66% and 94% of immature individuals are harvested). However, catches showed that only 1% to 32% of males are immature, which enables a success reproductive strategy of the population to offset the fishing effect. Better control of gear selectivity and implementation of spatial-temporal fishing closures are suggested for the management and conservation of this resource
Journal
Boletín de Investigaciones Marinas y Costeras
Volume
45
Issue/Article Nr
2
Page Range
pp. 253-268
DOI
10.25268/bimc.invemar.2016.45.2.685
Resource/Dataset Location
http://boletin.invemar.org.co/index.php/boletin/article/view/685/653
URI
http://hdl.handle.net/1834/10814
ae974a485f413a2113503eed53cd6c53
10.25268/bimc.invemar.2016.45.2.685
Scopus Count
Collections
3. Boletín de Investigaciones Marinas y Costeras

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