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Título : | Unusual high frequency of hermaphroditism in the gonochoric bivalve Megapitaria squalida (Sowerby, 1835) (Veneridae) |
Autor : | Romo Piñera, Abril K. Ceballos Vázquez, Bertha Patricia García Domínguez, Federico Andrés Arellano Martínez, Marcial |
Palabras clave : | squalid callista Megapitaria sex ratio overfishing chocolata clam |
Fecha de publicación : | 2009 |
Editorial : | Journal of Shellfish Research |
Resumen : | Through histological analyses, this investigation reveals an unusual high incidence of hermaphroditism in Megapitaria squalida, a gonochoric species. A total of 684 specimens were sampled at monthly intervals from February 2007 to January 2008 at Bahı´a de La Paz and Bahı´a Magdalena, Baja California Sur, Mexico. Microscopic examination showed that 21.8% of specimens from Bahı´a de La Paz and 23.5% from Bahı´a Magdalena were hermaphroditic; in both areas, hermaphroditism was found throughout the year, although in variable proportions. In general, a significantly higher Lumber of females relative to males (chi-square, P < 0.05) were observed in both areas. Our findings indicate that this unusual incidence of hermaphroditism was likely caused by the low population density resulting from overfishing. |
URI : | http://www.repositoriodigital.ipn.mx/handle/123456789/13100 |
ISSN : | 0730-8000 |
Aparece en las colecciones: | Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
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Romo_Pinera_Abril_K._2009_Journal_of_Shellfish_Research_2880.pdf | 53.5 kB | Adobe PDF | Visualizar/Abrir |
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