Gonadal morphology and difference in reproductive development of two isolated populations of Astyanax rivularis (Teleostei, Characidae)
| Autor: | José Augusto Senhorini, Alexandre Ninhaus-Silveira, Patricia Postingel Quirino, Maria Luiza Ribeiro Delgado, Maira da Silva Rodrigues, Amanda Pereira dos Santos-Silva, Diógenes Henrique de Siqueira-Silva, Rosicleire Veríssimo-Silveira |
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| Přispěvatelé: | Universidade Estadual Paulista (UNESP), R. Prof. Dr. Antonio Celso Wagner Zanin, Universidade Federal do Sul e Sudeste do Para, Chico Mendes Institute of Biodiversity Conservation |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Male
Arboreal locomotion media_common.quotation_subject Drainage basin Zoology Morphology (biology) Aquatic Science reproduction Rivers Animals Gonads Ecology Evolution Behavior and Systematics media_common geography Teleostei geography.geographical_feature_category biology Characidae oogenesis Reproduction geographic isolation Vegetation biology.organism_classification spermatogenesis reproductive development Female Development of the gonads Brazil |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Made available in DSpace on 2022-04-28T19:44:01Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01 Individuals of the same species may present different reproductive tactics depending on the environment in which they develop and mature. The present study aimed to define the gonadal development phases of males and females of Astyanax rivularis and to carry out a comparative analysis of the reproductive development of specimens captured in two isolated environments of the São Francisco River basin in Serra da Canastra, Brazil (Point 1: low vegetation and river showing calm and crystalline waters with small well formations; Point 2: current waters, and well-established areas of arboreal vegetation). Thus, the gonads of A. rivularis specimens were collected, fixed and processed with techniques for light microscopy. Five maturation phases of the females' reproductive cycle were established: immature, developing, spawning capable, regressing and regenerating. Three maturation phases of the males' reproductive cycle were observed: spawning capable, regressing, and regenerating. There are differences in the phases of gonadal development of A. rivularis between the two sampling points so that, possibly, animals upstream of the waterfall demonstrate a delay in the reproductive cycle in relation to animals downstream. Laboratory of Neotropical Ichthyology Universidade Estadual Paulista ‘Júlio de Mesquita Filho’ Campus de Ilha Solteira Institute of Biosciences Graduate Program in Biological Sciences (Zoology) R. Prof. Dr. Antonio Celso Wagner Zanin Research Group of Reproduction on Amazon Fish Instituto de Estudo em Saúde e Biologicas Universidade Federal do Sul e Sudeste do Para Department of Structural and Functional Biology Institute of Biosciences Reproductive and Molecular Biology Group. R. Prof. Dr. Antonio Celso Wagner Zanin Universidade Estadual Paulista ‘Júlio de Mesquita Filho’ Campus de Botucatu National Center for Research and Conservation of Continental Fish Chico Mendes Institute of Biodiversity Conservation Laboratory of Neotropical Ichthyology Universidade Estadual Paulista ‘Júlio de Mesquita Filho’ Campus de Ilha Solteira Department of Structural and Functional Biology Institute of Biosciences Reproductive and Molecular Biology Group. R. Prof. Dr. Antonio Celso Wagner Zanin Universidade Estadual Paulista ‘Júlio de Mesquita Filho’ Campus de Botucatu |
| Databáze: | OpenAIRE |
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