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Palestina Guevara-Fiore Gunilla Rosenqvist Penelope J. Watt 《Behavioral ecology and sociobiology》2010,64(10):1601-1607
Significant empirical evidence has demonstrated the importance of discriminative mate choice as a mechanism to avoid inbreeding.
Incestuous mating can be avoided by recognition of kin. The guppy, Poecilia reticulata, is a livebearer with a polygamous mating system and active female choice. Despite potential inbreeding costs in the guppy,
Viken et al. (Ethology 112:716–723, 2006) and Pitcher et al. (Genetica 134:137–146, 2008) have found that females do not discriminate between sibs and unrelated males. However, populations experiencing different
inbreeding histories can have different levels of inbreeding avoidance, and it is possible that the lack of inbreeding avoidance
observed in guppies is a consequence of using outbred fish only. Here we tested the preference of female guppies with different
inbreeding coefficients, for olfactory cues of males that were either unrelated but had the same inbreeding coefficient, or
were related (i.e. brother) with the same inbreeding coefficient. We found no evidence that female guppies preferred unrelated males with the
same inbreeding coefficient. Moreover, inbreeding level did not influence female preference for unrelated males, suggesting
that inbreeding history in a population has no influence on female discrimination of unrelated males in guppies. 相似文献
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Palestina Guevara-Fiore Jessica Stapley Penelope J. Watt 《Behavioral ecology and sociobiology》2010,64(10):1665-1672
Males vary in the degree to which they invest in mating. Several factors can explain this variation, including differences
in males’ individual condition and the fact that males allocate their energy depending on the context they face in each mating
attempt. Particularly, female quality affects male reproductive success. Here, we studied whether male guppies (Poecilia reticulata) strategically allocated more mating effort, in terms of mating behaviour and male–male competition, when they were matched
with a receptive (R) female than a non-receptive one. In accordance with our prediction, we found that males increased their
mating behaviour when they were with a receptive female. Even though male guppies can inseminate non-receptive females, we
only found high levels of courtship between males that were with a receptive female rather than a non-receptive one. Although
there was little affect of female receptivity on male–male competition, we found that males chased and interrupted courtships
more with receptive females than with non-receptive females regardless of odour. Finally, we also studied whether the sexual
pheromone produced by receptive female guppies is a cue that males use in order to increase their mating effort. We found
that males were more attracted to a female when they perceived the sexual pheromone, but only increased their mating and aggressive
behaviours when females showed receptive behaviour. This strategic increase in mating effort could result in higher male reproductive
success because mating attempts towards receptive females are likely to be less costly and males could have a greater probability
of fertilisation. 相似文献
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