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Orinoquia
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Orinoquia
Article . 2012 . Peer-reviewed
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Fecundidad de Hemigrammus hyanuary

Authors: Aya - Baquero, Elizabeth; Arias Castellanos, José A.;

Fecundidad de Hemigrammus hyanuary

Abstract

Título en ingles: Fecundity of Hemigrammus hyanuaryTítulo en portugués: Fecundidade de hyanuary de Hemigrammus Resumen: El conocimiento sobre la cantidad de huevos que una hembra es capaz de desovar en cada oportunidad reproductiva (fecundidad absoluta), es de gran importancia, pues de él depende el cálculo de las potencialidades reproductivas de la especie.Hemigrammus hyanuary es un atractivo tetra de color amarillo oro al que debe su nombre de "tetra brillante". Hace parte del 4% de las exportaciones del país y vive en cardúmenes multiespecíficos. Es omnívoro y se reproduce durante toda la época de lluvias de la región de la Orinoquía.Utilizando el método Gilson para la digestión de las gónadas, fueron estudiados los ovarios de veintidós hembras maduras de origen silvestre, de 4,2 ± 0,8 g de peso corporal, 3,2 ± 0,1 cm de longitud total y 0,041 ± 0,001 g de peso gonadal. Se determino la fecundidad absoluta, fecundidad relativa, el indicé gonadosomático y las frecuencias de los diámetros ovocitarios.La fecundidad absoluta fue de 182 ± 60 ovocitos / hembra, mientras que la fecundidad relativa de 43 ± 14 ovocitos por g de peso corporal y el índice gonadosomático de 9,7 ± 0,9. El histograma de frecuencia del diámetro de los ovocitos, así como el estudio histológico de las gónadas mostraron dos picos, lo que permite inferir que el desarrollo ovárico es asincrónico y explica los desoves parciales de la especie.Palabras clave: desarrollo gonadal; diámetro ovocitario; fecundidad relativa; índice gonadosomático; tetra brillante.Key words: gonadal development; gonadosomatic index; oocyte diameter; relative fecundity; tetra bright.

Country
Colombia
Keywords

gonadal development, índice gonadosomático, desarrollo gonadal, gonadosomatic index, fecundidad relativa, tetra bright, diámetro ovocitario, relative fecundity, tetra brillante, oocyte diameter

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
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gold