guppies had to learn to dislodge a disc that occluded a feeder from which they had been previously accustomed to feed.In Experiment 2,guppies had to solve a version of the detour task that required them to learn to enter a transparent cylinder from the open sides to reach a food reward ...
Both male and female aggression rates increased with ASR, but the increase for males was only significant in the low-predation population. In regard to male mating tactics, courtship propensity was unaffected by ASR, while the propensity to sneak increased at male-biased ASRs. Guppies from a ...
As they've gotten older the male developed black underparts, but the female looks largely the same and kind of looks like a juvenile male wild-type honey grouami. Maybe male honey gouramis use the brown line and lack of yellow to distinguish females from rival males. At least to me, sh...
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‐...
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 ...
Access to larger and more complex habitats may also generally enhance the opportunity for females to avoid male coercive behaviours. Despite this, however, female guppies in the wild can expe- rience more than one unsolicited mating attempt per min- ute (Magurran & Seghers 1994b...
The results show that the level of acquired resistance affects sexual display and attractiveness in guppies. They suggest that once an effective immunity is built up by a male, he can afford to incur higher costs for sexual characteristics, whereas a male that lacks the ability to build up ...
Phenotypic plasticity in adult life-history strategies compensates for a poor start in life in Trinidadian guppies (Poecilia reticulata). Am Nat 176: 818–829. Baker JA, Foster SA, Heins DC, Bell MA, King RW (1998). Variation in female life-history traits among Alaskan populations of the ...
It's extremely difficult to tell the sex of your hermit crab. The only way to be certain if a hermit crab is male or female is to get a look under her shell. Wait until the hermit crab is most, or all, of the way out of her shell before attempting to det
Predation risk and alternative mating tactics in male Trinidadian guppies (Poecilia reticulata) In the guppy (Poecilia reticulata), males have two alternative mating tactics. Individual males may either display to a receptive female prior to attemptin... JGJ Godin - 《Oecologia》 被引量: 324发表...