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| Content Provider | Springer Nature Link |
|---|---|
| Author | Deaton, Raelynn Cureton, James C. |
| Copyright Year | 2011 |
| Abstract | In this study, we explored the relationship between female masculinization and various morphological and reproductive parameters of male and female western mosquitofish (Gambusia affinis), including body size, anal fin length, testes mass and female fecundity. We detected high levels of female masculinization in the Brazos and Little Brazos Rivers (Falls County, Texas) in March 2008, but not 2009. In both populations, masculinized females were smaller, possessed shorter anal fins, and had significantly lower total fecundity (collective number of eggs and embryos) compared to non-masculinized females. In addition, 2008 non-masculinized females were smaller and less fecund than 2009 non-masculinized females in both populations. Moreover, 2008 males were smaller, had shorter gonopodia, and smaller testes than 2009 males. Our results support the hypothesis that female masculinization can have a strong influence on reproductive life history and population dynamics of livebearing fishes. |
| Starting Page | 551 |
| Ending Page | 558 |
| Page Count | 8 |
| File Format | |
| ISSN | 03781909 |
| Journal | Environmental Biology of Fishes |
| Volume Number | 92 |
| Issue Number | 4 |
| e-ISSN | 15735133 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2011-07-07 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Masculinization Reproductive traits Mosquitofish Gambusia Animal Systematics/Taxonomy/Biogeography Nature Conservation Environment Freshwater & Marine Ecology Zoology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Aquatic Science Ecology, Evolution, Behavior and Systematics |
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