| Registro completo |
| Provedor de dados: |
Biological Sciences
|
| País: |
Brazil
|
| Título: |
Reproductive indicators of the endemic species Astyanax bifasciatus (Teleostei: Characidae) in a tributary of the Lower Iguaçu River Basin, Brazil
|
| Autores: |
Oliveira, Elton Celton de
Auache-Filho, Alexandre Augusto
Damasio, Denis
Ghisi, Nédia de Castilhos
Michels-Souza, Maria Antônia
|
| Data: |
2019-12-18
|
| Ano: |
2019
|
| Palavras-chave: |
Gonadossomatic
Auto-ecology
Condition factor
Generalist
Spawning
|
| Resumo: |
The reproductive process promotes morphophysiological and behavioral changes in fish species throughout their life cycle. Its success is vital to define their resilience in the environment. This study aimed to evaluate the reproductive biology of the endemic fish species Astyanax bifasciatus in a tributary of the Lower Iguaçu River Basin, Paraná, Brazil. Fish were collected monthly at four sites along the Jirau Alto River in the city of Dois Vizinhos from October 2015 to September 2016. A standardized catch effort with gill nets and fish traps was used. In the laboratory, standard length and total weight were recorded. After anesthesia, the animals were sectioned to macroscopically determine the sex, sexual maturity stage, and presence of celomatic fat. The gonads and liver were removed to determine the gonadosomatic and hepatosomatic indexes, respectively. A total of 160 individuals (104 females and 56 males) were used. The gonadosomatic index, frequency of the gonadal maturation stages, and condition factor showed a long reproductive period with two investment cycles for both sex. Length at first sexual maturity was 4.57 cm for females and 3.56 cm for males. The reproductive data corroborate the generalist profile of the species and demonstrate a high degree of adaptive capacity, even in smaller tributaries.
|
| Tipo: |
Info:eu-repo/semantics/article
|
| Idioma: |
Inglês
|
| Identificador: |
http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/47720
10.4025/actascibiolsci.v41i1.47720
|
| Editor: |
Universidade Estadual De Maringá
|
| Relação: |
http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/47720/751375149112
|
| Formato: |
application/pdf
|
| Fonte: |
Acta Scientiarum. Biological Sciences; Vol 41 (2019): Publicação contínua; e47720
Acta Scientiarum. Biological Sciences; v. 41 (2019): Publicação contínua; e47720
1807-863X
1679-9283
|
| Direitos: |
Copyright (c) 2019 Acta Scientiarum. Biological Sciences
https://creativecommons.org/licenses/by/4.0
|
