| Autor: |
García-Cabello, Karla N, Callaway, Maren G, Johnson, Jerald B, Zúñiga-Vega, J Jaime |
| Zdroj: |
Biological Journal of the Linnean Society; Dec2024, Vol. 143 Issue 4, p1-16, 16p |
| Abstrakt: |
This study explores how specific reproductive strategies, placentotrophy and superfetation, influence the evolution of male gonopodial structures in livebearing fishes of the family Poeciliidae. Although previous expectations pointed to higher diversification rates in species exhibiting both placentotrophy and superfetation, our results offer an alternative perspective. Species lacking both placentotrophy and superfetation displayed elevated rates of diversification in gonopodium depth and length. Furthermore, species in which males exhibit colourful ornaments and/or courtship behaviour also had greater diversification rates of gonopodial length in comparison to species that lack these male traits. In addition, the evolution of gonopodial length was influenced by the presence of superfetation, with species exhibiting this reproductive strategy evolving towards longer gonopodia (regardless of the presence or absence of placentotrophy). Likewise, the optimal number of serrae on the gonopodia was significantly higher in species with superfetation, indicating their role in ensuring copulatory success in the face of increased male–male competition. In conclusion, although the expected link between gonopodial diversification and the joint presence of placentotrophy and superfetation was not fully substantiated, our study indicates that superfetation and the presence of male traits associated with precopulatory sexual selection have had a substantial influence on the evolution of gonopodial structures. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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