reproducción de la morena, gymnothorax equatorialis (pisces: muraenidae) en jalisco y colima, méxico

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ID: 225645
2008
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Abstract
Con el fin de analizar los aspectos reproductivos de Gymnothorax equatorialis se recolectaron mensualmente 707 organismos en las costas de Jalisco y Colima, México, de diciembre de 1995 a diciembre de 1998 y de agosto a diciembre de 1999. Las hembras fueron más numerosas y presentaron una longitud (54.7 cm) mayor a la de los machos (52.1 cm). La fecundidad total mínima fue de 9 660 huevos, la máxima de 99 992 y la media fue 32 029 huevos. La talla en la que el 50 % de los individuos presentan gónadas maduras (L50) fue de 43.7 cm de longitud total en hembras y de 42.7 cm en machos. Los ovarios presentaron dos tipos de ovocitos, los pequeños inmaduros en fase cromatina nucleolo (85.1 µm) y los grandes maduros en fase de vitelogénesis secundaria (701.6 µm). En el testículo maduro se observó una gran cantidad de espermatozoides en el tubo seminal y el desarrollo del testículo es de tipo lobular. Con base en las características de las gónadas y la evolución temporal del índice gonadosomático, se concluye que G. equatorialis se reproduce dos veces al año (a mediados y finales del año).
Reproduction of the fish Gymnothorax equatorialis (Pisces: Muraenidae) in Jalisco and Colima, Mexico. A total of 707 Gymnothorax equatorialis were collected monthly in the Jalisco and Colima coast, Mexico, from December 1995 to December 1998 and from August to November 1999, in order to determine their reproduction patterns. Females outnumbered and had longer bodies (mean length 54.7 cm) than males (52.1 cm). The minimum, maximum and mean values of total fecundity were respectively 9 660, 99 992 and 32 029 eggs. The total body length at which 50 percent of individuals have ripe gonads (L50) was 43.7 cm for females and 42.7 cm TL for males. Ovaries had two main types of oocytes: small inmature in cromatin nucleolus phase (85.1 µm) and large mature in secundary vitellogenesis phase (701.6 µm). High numbers of spermatozoa were observed in the seminal tubes of ripe testicles, which presented a lobular development. Based in gonad features and temporal changes in the gonad-somatic index, it is concluded that G. equatorialis has two relatively short reproduction periods (at the middle and at the end of the year). Rev. Biol. Trop. 56 (1): 153-163. Epub 2008 March 31.
Reference Key
lucano-ramrez2008revistareproduccin Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;G Lucano-Ramírez;S Ruiz-Ramírez;J.A Rojo-Vázquez;G González-Sansón
Journal science journal of university of zakho
Year 2008
DOI
DOI not found
URL
http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442008000100010
Keywords
reproduction reproducción fecundity coast of jalisco and colimabiology (general)

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