Growth and mortality of Pinctada imbricata (Mollusca: Pteridae) in Guamachito, Araya Peninsula, Sucre State, Venezuela

Growth and mortality of Pinctada imbricata (Mollusca: Pteridae) in Guamachito, Araya Peninsula, Sucre State, Venezuela

Growth, size distribution and mortality of Pinctada imbricata from Guamachito, Araya Peninsula, Venezuela, were analyzed between January and December 2000. Monthly samples were taken on perpendicular transepts to the coastline with an artisanal dredge, and data on sea surface temperature, dissolved...

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Autores principales: Marcano, JS, Prieto, A, Lárez, A, Alió, JJ, Sanabria, H
פורמט: Online
שפה:eng
יצא לאור: Iniversidad Autónoma de Baja California 2005
גישה מקוונת:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/55
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id oai:cienciasmarinas.com.mx:article-55
record_format ojs
institution Ciencias Marinas
collection OJS
language eng
format Online
author Marcano, JS
Prieto, A
Lárez, A
Alió, JJ
Sanabria, H
spellingShingle Marcano, JS
Prieto, A
Lárez, A
Alió, JJ
Sanabria, H
Growth and mortality of Pinctada imbricata (Mollusca: Pteridae) in Guamachito, Araya Peninsula, Sucre State, Venezuela
author_facet Marcano, JS
Prieto, A
Lárez, A
Alió, JJ
Sanabria, H
author_sort Marcano, JS
title Growth and mortality of Pinctada imbricata (Mollusca: Pteridae) in Guamachito, Araya Peninsula, Sucre State, Venezuela
title_short Growth and mortality of Pinctada imbricata (Mollusca: Pteridae) in Guamachito, Araya Peninsula, Sucre State, Venezuela
title_full Growth and mortality of Pinctada imbricata (Mollusca: Pteridae) in Guamachito, Araya Peninsula, Sucre State, Venezuela
title_fullStr Growth and mortality of Pinctada imbricata (Mollusca: Pteridae) in Guamachito, Araya Peninsula, Sucre State, Venezuela
title_full_unstemmed Growth and mortality of Pinctada imbricata (Mollusca: Pteridae) in Guamachito, Araya Peninsula, Sucre State, Venezuela
title_sort growth and mortality of pinctada imbricata (mollusca: pteridae) in guamachito, araya peninsula, sucre state, venezuela
description Growth, size distribution and mortality of Pinctada imbricata from Guamachito, Araya Peninsula, Venezuela, were analyzed between January and December 2000. Monthly samples were taken on perpendicular transepts to the coastline with an artisanal dredge, and data on sea surface temperature, dissolved oxygen and salinity were registered. The size distribution was variable, with a predominance of size between 50 and 70 mm in length, which represented 75% of the population. The greatest amount of juveniles was observed in March, when the mean length of the population was 55.8 mm. The variation in mean wet and dry weights presented a similar trend, with minimum values in June, July, September and October. The length/wet weight and length/ dry weight relationships were highly significant (P < 0.05). The parameters of the seasonal von Bertalanffy growth equation were L∞ = 85.15 mm, K = 1.42 yr–1, ts = 0.2 and C = 0.20, indicating a slow growth in the period from July to November (WP = 0.42) that could be associated with the environmental conditions of the area. Longevity was estimated to be three years. Total mortality rate (Z) was 3.45 per year for small individuals (10–36 mm) and 14.36 per year for the larger individuals (36–84 mm). The high growth rate of P. imbricata supports its use for aquacultural purposes in the region. The Guamachito oyster bank shows good conditions to support sustained fishery exploitation, considering fishery parameters such as registered catch, optimal effort, minimum extraction size, fishing mortality and natural mortality.
publisher Iniversidad Autónoma de Baja California
publishDate 2005
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/55
_version_ 1715723929015812096
spelling oai:cienciasmarinas.com.mx:article-552019-04-24T20:28:34Z Growth and mortality of Pinctada imbricata (Mollusca: Pteridae) in Guamachito, Araya Peninsula, Sucre State, Venezuela Crecimiento y mortalidad de Pinctada imbricata (Mollusca: Pteridae) en Guamachito, Península de Araya, Estado Sucre, Venezuela Marcano, JS Prieto, A Lárez, A Alió, JJ Sanabria, H bivalve pearl oyster Pinctada imbricata growth mortality Venezuela bivalvo ostra perla Pinctada imbricata crecimiento mortalidad Venezuela Growth, size distribution and mortality of Pinctada imbricata from Guamachito, Araya Peninsula, Venezuela, were analyzed between January and December 2000. Monthly samples were taken on perpendicular transepts to the coastline with an artisanal dredge, and data on sea surface temperature, dissolved oxygen and salinity were registered. The size distribution was variable, with a predominance of size between 50 and 70 mm in length, which represented 75% of the population. The greatest amount of juveniles was observed in March, when the mean length of the population was 55.8 mm. The variation in mean wet and dry weights presented a similar trend, with minimum values in June, July, September and October. The length/wet weight and length/ dry weight relationships were highly significant (P < 0.05). The parameters of the seasonal von Bertalanffy growth equation were L∞ = 85.15 mm, K = 1.42 yr–1, ts = 0.2 and C = 0.20, indicating a slow growth in the period from July to November (WP = 0.42) that could be associated with the environmental conditions of the area. Longevity was estimated to be three years. Total mortality rate (Z) was 3.45 per year for small individuals (10–36 mm) and 14.36 per year for the larger individuals (36–84 mm). The high growth rate of P. imbricata supports its use for aquacultural purposes in the region. The Guamachito oyster bank shows good conditions to support sustained fishery exploitation, considering fishery parameters such as registered catch, optimal effort, minimum extraction size, fishing mortality and natural mortality. Se analizó el crecimiento, la distribución de tallas y la mortalidad de una población de Pinctada imbricata en Guamachito, Península de Araya, Venezuela, entre enero y diciembre de 2000. Los muestreos se realizaron mensualmente sobre transeptos perpendiculares a la línea de la costa con una rastra artesanal, tomando también datos sobre temperatura, oxígeno disuelto y salinidad de la columna de agua. La distribución de tallas fue variable con un predominio de tallas entre 50 y 70 mm, que constituyeron el 75% de la población. La mayor cantidad de juveniles fue observada en marzo, cuando la longitud media en la población fue de 55.8 mm. Los promedios de los pesos húmedo y seco siguieron la misma tendencia, con valores mínimos en junio, julio, septiembre y octubre de 2000. Las relaciones longitud-peso húmedo y longitud-peso seco fueron altamente significativas (P < 0.05). Los parámetros de la ecuación de crecimiento estacionalizada de von Bertalanffy fueron L∞ = 85.15 mm; K = 1.42 año–1, ts = 0.2, y C = 0.20; indicando un crecimiento lento (WP = 0.42) en el periodo de julio a noviembre, asociado con los parámetros ambientales del área con una longevidad estimada en 3 años. La mortalidad total fue de 14.35 año para los individuos pequeños (10–36 mm) y 3.45 año, para los individuos grandes (36–84 mm). La alta tasa de crecimiento de P. imbricata muestra ser una ventaja para considerarla como una especie con potencial para actividades de acuicultura en la región. El banco ostrícola presenta buenas condiciones para mantener una explotación pesquera sostenida, tomando en consideración parámetros pesqueros como la captura registrada, el esfuerzo óptimo, la talla mínima de extracción, la mortalidad por pesca y la mortalidad natural. Iniversidad Autónoma de Baja California 2005-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/55 10.7773/cm.v31i2.55 Ciencias Marinas; Vol. 31 No. 2 (2005); 387-397 Ciencias Marinas; Vol. 31 Núm. 2 (2005); 387-397 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/55/37

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