Reproduction of the fish Poeciliopsis gracilis (Cyprinodontiformes: Poeciliidae) in Coatetelco, a tropical shallow lake in Mexico
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| Autoři: | , , , , |
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| Médium: | artículo original |
| Stav: | Versión publicada |
| Datum vydání: | 2018 |
| Popis: | A reproductive analysis of 1 225 specimens of Poeciliopsis gracilis obtained through monthly samples from Coatetelco, a tropical shallow lake in Central Mexico, was made. There was an evident sexual dimorphism, including a difference in body size at the onset of reproduction. Sex ratio deviated significantly from unity. Monthly variations in gonadosomatic (GSI), hepatosomatic (HSI) indexes and ovarian development stages showed that the spawning season was from July to October, coinciding with the rainy season and phytoplankton biomass increase. |
| Země: | Portal de Revistas UCR |
| Instituce: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Jazyk: | Inglés |
| OAI Identifier: | oai:portal.ucr.ac.cr:article/32946 |
| On-line přístup: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/32946 |