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Estado de la población y valoración de algunas estratégias de conservación del recurso Piangua Anadara tuberculosa (Sowerby) en sectores de Bazán y Nerete, costa pacífica nariñense de Colombia.

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Author
Espinosa G., Silvana
Delgado Hernández, María Fernanda
Orobio Riofrío, Bernardo
Mejía Ladino, Luz Marina
Gil Agudelo, Diego L.
Date
2010

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Alternative Title
Population status and valuation of some conservation strategies of piangua Anadara tuberculosa (Sowerby) in areas of Bazan and Nerete, Narino, Pacific coast of Colombia.
Abstract
Esta investigación tuvo como objetivo el conocer el estado de la población de piangua en dos lugares del departamento de Nariño (costa pacífica colombiana) y valorar estrategias para su conservación como el establecimiento de épocas de descanso de la actividad de extracción, rotación de áreas de concheo y control de la captura por debajo de la talla mínima de 5 cm reglamentada por el INPA (resolución 539 de 2000). Para esto se establecieron parcelas permanentes donde se colectaron todas las pianguas utilizando la técnica manual tradicional, registrando su abundancia y datos morfométricos de cada individuo. Muestreos posteriores se realizaron a diferentes intervalos de tiempo según la estrategia a evaluar. Se colectaron 10441 individuos de A. tuberculosa, 61 % en Bazán y 39 % en Nerete. Las estrategias de conservación evaluadas mostraron efectos positivos en la conservación y aprovechamiento sostenible del recurso, siendo la época de descanso con un tiempo de dos meses entre colectas la práctica de conservación que dio mejores resultados (p= 0.027 para Bazán y p= 8.57E-06 para Nerete; Tukey: p< 0.05); en Bazán únicamente esta estrategia arrojó resultados positivos mientras que en Nerete las tres estrategias de conservación mostraron ser eficientes.
The objective of this investigation was to evaluate the status of piangua ( Anadara tuberculosa, Sowerby) populations in two areas of the province of Nariño (Pacific coast of Colombia), and to assess the effect on natural communities of conservation strategies such as closed periods, rotation on extracting areas, and enforcement of the 5 cm minimum size declared by INPA (resolution 539, 2000). Permanent plots were set up and all piangua were collected using the traditional manual techniques. Morphometric measurements of gathered organisms were recorded. Subsequent samplings were performed at different 162 Boletín de Investigaciones Marinas y Costeras - Vol. 39 (1) - 2010 times depending on the conservation strategy evaluated. A total of 10441 individuals of A. tuberculosa were collected, 61 % corresponding to Bazán and 39 % to Nerete. All conservation strategies assessed showed positive effects on the conservation and sustainable use of the resource, being closed periods of two months the one with better results (p= 0.027 for Bazán and p= 8.57E-06 for Nerete; Tukey: p< 0.05); in Bazán, this strategy was the only one showing positive results, while in Nerete the three strategies showed to be effective.
Journal
Boletín de Investigaciones Marinas y Costeras
Volume
39
Issue/Article Nr
1
Page Range
pp.161-176
URI
http://hdl.handle.net/1834/6766
Collections
SPINCAM Publications (Colombia)

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