Unusual high frequency of hermaphroditism in the gonochoric bivalve megapitaria squalida (sowerby, 1835) (veneridae)

Abril K. Romo Piñera, Bertha Patricia Ceballos-Vázquez, Federico García-Domnguez, Marcial Arellano-Martínez

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

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 Baha de La Paz and Baha Magdalena, Baja California Sur, Mexico. Microscopic examination showed that 21.8% of specimens from Baha de La Paz and 23.5% from Baha Magdalena were hermaphroditic; in both areas, hermaphroditism was found throughout the year, although in variable proportions. In general, a significantly higher number 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.
Original languageAmerican English
Pages (from-to)785-789
Number of pages5
JournalJournal of Shellfish Research
DOIs
StatePublished - 1 Dec 2009
Externally publishedYes

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Veneridae
hermaphroditism
bivalve
Bivalvia
incidence
overfishing
population density
Mexico

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title = "Unusual high frequency of hermaphroditism in the gonochoric bivalve megapitaria squalida (sowerby, 1835) (veneridae)",
abstract = "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 Baha de La Paz and Baha Magdalena, Baja California Sur, Mexico. Microscopic examination showed that 21.8{\%} of specimens from Baha de La Paz and 23.5{\%} from Baha Magdalena were hermaphroditic; in both areas, hermaphroditism was found throughout the year, although in variable proportions. In general, a significantly higher number 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.",
author = "{Romo Pi{\~n}era}, {Abril K.} and {Patricia Ceballos-V{\'a}zquez}, Bertha and Federico Garc{\'i}a-Domnguez and Marcial Arellano-Mart{\'i}nez",
year = "2009",
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doi = "10.2983/035.028.0407",
language = "American English",
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TY - JOUR

T1 - Unusual high frequency of hermaphroditism in the gonochoric bivalve megapitaria squalida (sowerby, 1835) (veneridae)

AU - Romo Piñera, Abril K.

AU - Patricia Ceballos-Vázquez, Bertha

AU - García-Domnguez, Federico

AU - Arellano-Martínez, Marcial

PY - 2009/12/1

Y1 - 2009/12/1

N2 - 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 Baha de La Paz and Baha Magdalena, Baja California Sur, Mexico. Microscopic examination showed that 21.8% of specimens from Baha de La Paz and 23.5% from Baha Magdalena were hermaphroditic; in both areas, hermaphroditism was found throughout the year, although in variable proportions. In general, a significantly higher number 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.

AB - 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 Baha de La Paz and Baha Magdalena, Baja California Sur, Mexico. Microscopic examination showed that 21.8% of specimens from Baha de La Paz and 23.5% from Baha Magdalena were hermaphroditic; in both areas, hermaphroditism was found throughout the year, although in variable proportions. In general, a significantly higher number 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.

U2 - 10.2983/035.028.0407

DO - 10.2983/035.028.0407

M3 - Article

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JO - Journal of Shellfish Research

JF - Journal of Shellfish Research

SN - 0730-8000

ER -