The offspring size fecundity trade off and female fitness in the Atlantic molly (Poecilia mexicana, Poeciliidae)
Across a variety of taxa, large offspring have been demonstrated to have a fitness advantage over smaller offspring of the same species. However, producing large offspring often comes at the cost of having to produce fewer young, and the payoff (and thus, evolutionary outcome) of this trade-off is expected to vary between environments. Atlantic mollies (Poecilia mexicana: Poeciliidae, Teleostei), inhabiting a sulfidic cave and various non-sulfidic surface habitats in Tabasco (Mexico), are reproductively isolated and evolved divergent female lifehistory traits: females of the cave ecotype produce considerably fewer, but larger offspring. Stressful (sulfidic) environments may favor the production of larger offspring, as they are better able to cope with chemical stressors. It remains to be determined
| Main Authors: | , , |
|---|---|
| Format: | Texto biblioteca |
| Language: | eng |
| Subjects: | Peces, Poecilia mexicana, Ecología, Artfrosur, |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|