Artículo
Inter-individual variability in reproductive success and somatic growth in Cichlasoma dimerus (Heckel, 1840)
Delgadin, Tomás Horacio
; Pérez Sirkin, Daniela Irina
; Karp, Paola Julieta
; Fossati, Mariana; Vissio, Paula Gabriela
Fecha de publicación:
07/2014
Editorial:
Soc Royale Zoologique Belgique
Revista:
Belgian Journal Of Zoology
ISSN:
0777-6276
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Environmental factors and social interactions are known to affect somatic growth and reproduction in teleost fish. It has been described for Cichlasoma dimerus that only one pair is formed under a wide range of laboratory conditions. However, this was not observed in tanks composed of three males and three females, where multiple pair formation occurred. Thus, our objective was to evaluate somatic growth and reproductive performance in C. dimerus under this particular condition, in which more than one pair is expected to be formed. A clear sexual growth dimorphism, with males growing faster than females, and multiple pair formation, sometimes simultaneously, were observed. Both features were absent in previous studies with other aquaria structures. Additionally, there was a significant association between reproductive events and body size, where the bigger the fish, both male and female, the higher the number of reproductive events. Despite the sexual growth dimorphism, no differences were observed between males and females in IGF-I and GHR2 mRNA levels. The results obtained for this social species show a high inter-individual variability in the aquaria in regard to reproductive success and growth. This may have implications on experimental design, where a low level of heterogeneity between fish is desirable. If this variability is not taken into account, possible treatment effects may not be detected.
Palabras clave:
Body Size
,
Cichlids
,
Growth Dimorphism
,
Reproductive Events
Archivos asociados
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Identificadores
Colecciones
Articulos(IBBEA)
Articulos de INSTITUTO DE BIODIVERSIDAD Y BIOLOGIA EXPERIMENTAL Y APLICADA
Articulos de INSTITUTO DE BIODIVERSIDAD Y BIOLOGIA EXPERIMENTAL Y APLICADA
Citación
Delgadin, Tomás Horacio; Pérez Sirkin, Daniela Irina; Karp, Paola Julieta; Fossati, Mariana; Vissio, Paula Gabriela; Inter-individual variability in reproductive success and somatic growth in Cichlasoma dimerus (Heckel, 1840) ; Soc Royale Zoologique Belgique; Belgian Journal Of Zoology; 144; 2; 7-2014; 102-111
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