Population genetics of the pink snail Strombus gigas in the Yucatan Peninsula:Implications for its management and fishery

The genetic population structure of the pink snail Strombus gigas in the Yucatan Peninsula, Mexico, was determined by isozyme expression in polyacrylamide gels. Muscle samples of 50 organisms, captured at four sites of the Yucatan Peninsula, were used to characterize the genotypic expression as reve...

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Main Authors: Tello-Cetina, JA, Rodríguez-Gil, LA, Rodríguez-Romero, F
Format: Online
Language:eng
Published: Iniversidad Autónoma de Baja California 2005
Online Access:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/56
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spelling oai:cienciasmarinas.com.mx:article-562019-04-24T20:02:37Z Population genetics of the pink snail Strombus gigas in the Yucatan Peninsula:Implications for its management and fishery Genética poblacional del caracol rosado Strombus gigas en la Península de Yucatán: Implicaciones para su manejo y pesquería Tello-Cetina, JA Rodríguez-Gil, LA Rodríguez-Romero, F population genetics isozymes Strombus gigas genética de poblaciones isoenzimas Strombus gigas The genetic population structure of the pink snail Strombus gigas in the Yucatan Peninsula, Mexico, was determined by isozyme expression in polyacrylamide gels. Muscle samples of 50 organisms, captured at four sites of the Yucatan Peninsula, were used to characterize the genotypic expression as revealed by the expression of 55 loci in 30 enzymatic systems. The TFPGA program was used to analyze genic frequency data. The following parameters were determined: descriptive statistics, F statistic, genetic distances, Hardy-Weinberg equilibrium, UPGMA and the number of migrants as indicator of gene flow. Heterozygosity values ranged from 0.3240 for OCTDH 2 to 0.0440 for FUM, with a mean value of 0.0366; Fis values ranged from 0.0835 for OCTDH 2 to 0.3600 for FUM, with a mean value of –0.0492; and Fst values ranged from 0.0082 for LAP 2 to 0.1967 for MDH 2, with a mean value of 0.1039, suggesting heterozygote deficiency. The number of migrants derived from the Slatkin equation is 2.156 per generation, which suggests a certain degree of variability among populations and corroborates the low values obtained for Nei´ s genetic distance, of 0.0053 for the node showing the separation of the population from Arrecife de Alacranes from the other populations. We conclude that the S. gigas populations studied here do not present genetic fragility for their subsistence. Se determinó la estructura genética poblacional del caracol rosado Strombus gigas en la Península de Yucatán, México, mediante la expresión de isoenzimas en geles de poliacrilamida. Se utilizaron muestras de músculo de 50 organismos, capturados en cada uno de los cuatro sitios de la Península de Yucatán seleccionados, para caracterizar la expresión genotípica revelada por la expresión de 55 loci en 30 sistemas enzimáticos. Se utilizó el programa TFPGA versión 1.3 para procesar los datos de frecuencias génicas de aloenzimas de las poblaciones en estudio. Los parámetros determinados fueron: estadística descriptiva, estadística F, distancias genéticas, equilibrio de Hardy-Weinberg, UPGMA y el número de migrantes como indicador del flujo de genes. Los valores de heterocigosis, en un rango de 0.3240 para OCTDH 2 hasta 0.0440 para FUM y promedio de 0.0366, los de Fis, con un rango de 0.0835 para OCTDH 2 hasta 0.3600 para la FUM y promedio de –0.0492, y los de Fst, con un rango de 0.0082 para LAP 2 hasta 0.1967 para MDH 2 y promedio de 0.1039, indican una deficiencia de heterocigotos. El número de migrantes derivado de la ecuación de Slatkin resultó de 2.156 por generación, lo que en forma global indica un cierto grado de variabilidad entre las poblaciones y es consistente con los bajos valores de distancia genética de Nei encontrados, particularmente en el nodo que sugiere la separación de la población de Alacranes de las otras poblaciones estudiadas, con un valor obtenido de 0.0053. Por los resultados, se concluye que las poblaciones de S. gigas en el Caribe mexicano presentan niveles de variabilidad genética que no reflejan fragilidad para su subsistencia. 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/56 10.7773/cm.v31i2.56 Ciencias Marinas; Vol. 31 No. 2 (2005); 379-386 Ciencias Marinas; Vol. 31 Núm. 2 (2005); 379-386 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/56/38
institution Ciencias Marinas
collection OJS
language eng
format Online
author Tello-Cetina, JA
Rodríguez-Gil, LA
Rodríguez-Romero, F
spellingShingle Tello-Cetina, JA
Rodríguez-Gil, LA
Rodríguez-Romero, F
Population genetics of the pink snail Strombus gigas in the Yucatan Peninsula:Implications for its management and fishery
author_facet Tello-Cetina, JA
Rodríguez-Gil, LA
Rodríguez-Romero, F
author_sort Tello-Cetina, JA
title Population genetics of the pink snail Strombus gigas in the Yucatan Peninsula:Implications for its management and fishery
title_short Population genetics of the pink snail Strombus gigas in the Yucatan Peninsula:Implications for its management and fishery
title_full Population genetics of the pink snail Strombus gigas in the Yucatan Peninsula:Implications for its management and fishery
title_fullStr Population genetics of the pink snail Strombus gigas in the Yucatan Peninsula:Implications for its management and fishery
title_full_unstemmed Population genetics of the pink snail Strombus gigas in the Yucatan Peninsula:Implications for its management and fishery
title_sort population genetics of the pink snail strombus gigas in the yucatan peninsula:implications for its management and fishery
description The genetic population structure of the pink snail Strombus gigas in the Yucatan Peninsula, Mexico, was determined by isozyme expression in polyacrylamide gels. Muscle samples of 50 organisms, captured at four sites of the Yucatan Peninsula, were used to characterize the genotypic expression as revealed by the expression of 55 loci in 30 enzymatic systems. The TFPGA program was used to analyze genic frequency data. The following parameters were determined: descriptive statistics, F statistic, genetic distances, Hardy-Weinberg equilibrium, UPGMA and the number of migrants as indicator of gene flow. Heterozygosity values ranged from 0.3240 for OCTDH 2 to 0.0440 for FUM, with a mean value of 0.0366; Fis values ranged from 0.0835 for OCTDH 2 to 0.3600 for FUM, with a mean value of –0.0492; and Fst values ranged from 0.0082 for LAP 2 to 0.1967 for MDH 2, with a mean value of 0.1039, suggesting heterozygote deficiency. The number of migrants derived from the Slatkin equation is 2.156 per generation, which suggests a certain degree of variability among populations and corroborates the low values obtained for Nei´ s genetic distance, of 0.0053 for the node showing the separation of the population from Arrecife de Alacranes from the other populations. We conclude that the S. gigas populations studied here do not present genetic fragility for their subsistence.
publisher Iniversidad Autónoma de Baja California
publishDate 2005
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/56
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