| Journal: | Revista brasileira de zoologia |
| Database: | PERIÓDICA |
| System number: | 000281044 |
| ISSN: | 0101-8175 |
| Authors: | Favaro, Luis Fernando1 Lopes, Sabine de C. G2 Spach, Henry Louis3 |
| Institutions: | 1Universidade Federal do Parana, Setor de Ciencias Biologicas, Curitiba, Parana. Brasil 2Universidade Federal do Parana, Departamento de Genetica, Curitiba, Parana. Brasil 3Universidade Federal do Parana, Centro de Estudos do Mar, Pontal do Parana, Parana. Brasil |
| Year: | 2003 |
| Season: | Sep |
| Volumen: | 20 |
| Number: | 3 |
| Pages: | 501-506 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | The present study investigated the reproductive biology of silverside, Atherinella brasiliensis (Quoy & Gaimard, 1825) in a tidal flat of Paranaguá Bay, littoral of Paraná State, Brazil. Fish were captured monthly from November 1998 to October 1999 by the mean of a seine-net. For each individual, total body length, total weight, sex, and gonadal weight were recorded. Gonadal development stages were also defined based on the histological examination of the ovaries and on the visual aspects of the testes. It was defined that the reproductive period of A. brasiliensis extends from June to December, based on he analyses of individual gonadosomatic index (GSI) values distribution in relation to the sampling periods, on the monthly variation of the GSI mean values (Curve of Maturation), both for males and females, and on the monthly variation of the relative frequencies of the female maturation stages. During this period, matured, partially spawned and spent females were found in higher frequencies in comparison to the other months. The sizes at first maturation were defined as 7,61cm and 6,92cm for females and males, respectively |
| Disciplines: | Biología, Medicina veterinaria y zootecnia |
| Keyword: | Peces, Reproducción y genética animal, Ciclo reproductivo, Indice gonadosomático, Análisis histológico, Madurez sexual, Atherinella brasiliensis, Atherinidae, Brasil |
| Keyword: | Biology, Veterinary medicine and animal husbandry, Fish, Animal reproduction and genetics, Reproductive cycle, Gonadosomatic index, Histological analysis, Sexual maturity, Atherinella brasiliensis, Atherinidae, Brazil |
| Full text: | Texto completo (Ver HTML) |
