Evolution: Vertebrate Reproductive Strategies Get Mixed up
نویسندگان
چکیده
منابع مشابه
Evolution: Vertebrate Reproductive Strategies Get Mixed up
The mangrove killifish is the only vertebrate known to have a mixed-mating strategy, where hermaphrodites reproduce by either self-fertilisation or cross-breeding. New molecular evidence from this species reveals that occasional cross-breeding between common hermaphroditic individuals and rare pure males results in an injection of genetic variation into otherwise highly homozygous 'clonal' line...
متن کاملEvolution of mixed reproductive strategies in simple life-history models
Frequency-dependent selection may favour the evolution of mixed reproductive strategies, resulting in polymorphic life-histories within a population. Here I explore the theoretical and ecological possibilities for evolution of mixed reproductive strategies in two minimal age-structured life-history models. The first model addresses evolution of delayed maturity (i.e., competition between annual...
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Selten (1980, J. Theoret. Biol., 84, 93–101) showed that no mixed equilibria are evolutionarily stable when players can condition their strategies on their roles in a game. Alternatively, Harsanyi’s (1973, Int. J. Game Theory, 2, 1–23) purification argument implies that all mixed equilibria are approximations of strict, and hence evolutionarily stable, equilibria of games with slightly perturbe...
متن کاملParent-offspring conflict in the evolution of vertebrate reproductive mode.
We propose and evaluate the hypothesis that parent-offspring conflict over the degree of maternal investment has been one of the main selective factors in the evolution of vertebrate reproductive mode. This hypothesis is supported by data showing that the assumptions of parent-offspring conflict theory are met for relevant taxa; the high number of independent origins of viviparity, matrotrophy ...
متن کاملInvasive Fire Ants Reduce Reproductive Success and Alter the Reproductive Strategies of a Native Vertebrate Insectivore
BACKGROUND Introduced organisms can alter ecosystems by disrupting natural ecological relationships. For example, red imported fire ants (Solenopsis invicta) have disrupted native arthropod communities throughout much of their introduced range. By competing for many of the same food resources as insectivorous vertebrates, fire ants also have the potential to disrupt vertebrate communities. ME...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2006
ISSN: 0960-9822
DOI: 10.1016/j.cub.2006.09.023