Spawning season, ovarian development and fecundity of female Trichomycterus corduvense (Osteichthyes, Siluriformes)

We studied female reproductive biology of Trichomycterus corduvense. The study was carried out in the Anizacate River (Córdoba, Argentina). Samples were collected throughout one year on a monthly basis. Seven oocyte phases were identified. Five ovarian stages were described based on the macroscopic...

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Bibliographic Details
Published in:Hydrobiologia 2005-02, Vol.534 (1-3), p.223-230
Main Authors: MARRARO, Francisco, BISTONI, Maria De Los Angeles, CARRANZA, Miriam
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Biological and medical sciences
Correlation coefficient
Fecundity
Females
Freshwater
Fundamental and applied biological sciences. Psychology
General aspects
Spawning
Synecology
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Summary:We studied female reproductive biology of Trichomycterus corduvense. The study was carried out in the Anizacate River (Córdoba, Argentina). Samples were collected throughout one year on a monthly basis. Seven oocyte phases were identified. Five ovarian stages were described based on the macroscopic analysis of the oocyte phases. The spawning season for the species ranges from October to February; it was determined based on variations in GSI and the existence of mature females. The dynamics of oocyte development of T. corduvense, indicated the asynchronism of maturation. The correlation coefficient between fecundity and the individual weight was very low. Therefore, we suggest that this coefficient cannot be used to predict T. corduvense fecundity.[PUBLICATION ABSTRACT]
ISSN:0018-8158
1573-5117
DOI:10.1007/s10750-004-1635-2