solvingi tasks.In Experiment 1,females clearly outperformed males,and in Experiment 2,guppies showed a reversed but smaller sex difference.This study indicates that sex differences may play an important role in fish's problem-solving similar to what has previously been observed in some mammalian ...
The effects of adult sex ratio on mating competition in male and female guppies (Poecilia reticulata) in two wild populations 来自 Semantic Scholar 喜欢 0 阅读量: 95 作者:PJC Chuard,GE Brown,JWA Grant 摘要: When competing for mates, males typically exhibit higher rates of intrasexual ...
Here, we examined whether conflict over the frequency and timing of mating between male and female guppiesPoecilia reticulatacan induce changes in swimming performance and aerobic capacity in females as they work to escape harassment by males.Females exposed to higher levels of harassment over a 5‐...
Biased mating due to female preferences towards certain traits in males is a major mechanism driving sexual selection, and may constitute an important evolutionary force in organisms with sexual reproduction. In birds, although the role of male ornamenta
et al. Intraspecific evidence from guppies for correlated patterns of male and female genital trait diversification. Proc. R. Soc. Lond. B (advance online publication; doi:10.1098/rspb.2010.2453) (2011). Eberhard, W. G. Rapid divergent evolution of sexual morphology: comparative tests of ...
Male genitalia typically exhibit patterns of rapid and divergent evolution, and there is now considerable evidence that sexual selection is an important driver of these patterns of phenotypic variation. Female genitalia have been less well studied, and a
Researchers at the University of California, Los Angeles (UCLA) learned that female guppies are drawn strongly to males with intermediate levels of drosopterins; so females desire males with the orange patches. Even when the females were presented with a wider variety of colors, they chose orange...
Here, we examined whether conflict over the frequency and timing of mating between male and female guppies Poecilia reticulata can induce changes in swimming performance and aerobic capacity in females as they work to escape harassment by males. 4. Females exposed to higher levels ...
Hi guys, I'm so sad. I have a male and female pair of honey gouramis. The male has always chased the female around but he's never hurt her before and he'd usually stop once she got over to "her side of the tank". I was having to feed them on opposite sid
Besides humans, other mammals such as cats, dogs, and certain fish (i.e., guppies) have the XX-XY mechanism. Birds TheZW-ZZ systemoperates in birds. Thegene DMRT1lies on the Z chromosome and acts as the master switch. The embryo develops as a female when a single copy of the g...