viernes, 4 de noviembre de 2016

What are some species whose females commit infanticide in order to access to males to mate with? Females mirrorring the behavior of lions.

Animals are the greatest ruler breakers you can imagine. And when there is a rule, very surely there are some animal species able to break it. Although it is true that there are there are less females that commit infanticide due to sexual conflict than males, those females exist.
Ok, they are females mirroring lions (obviously males) for some extent.  There is a nice, in reality terrible concept, called Sexual conflict , that occurs when the two sexes have conflicting optimal fitness strategies concerning reproduction, particularly over the mode and frequency of mating, potentially leading to an evolutionary arms race between males and females.
These females are looking for males to mate with, and why are those males not expelling their hearts off, running to mate with them?. Because they are very busy raising up their own offspring, single parenting them.
This scenario is impossible for mammals, mothers have to lactate their offspring. But when you lay eggs...the world is broader place for you, and not all of them decide to stay at home.
Some examples:
Wattled jacanas (Jacana jacana)


Does she resemble a lion?. Yes, when you learn some things about her.
A wading bird from Panama. In this species  it is exclusively the male sex that broods, while females defend their territory. Wattled jacana
In a thoroughly documented research Stephen Emlen and Natalie Demong showed female infanticide of chicks. I don't agree with so intrussive experiments, and less than that with shoting females, but in any case the results of the experiment were spectacular. They found that removing females from a territory (a result they got shoting at them) resulted in nearby females attacking the chicks of the male in most cases, evicting them from their nest. The males then fertilized the offending females and cared for their young.

Female rats will eat the kits of strange females for a source of nutrition, and to take over the nest for her own litter

Infanticide is also seen in giant water bugs.
Lethocerus deyrollei is a large and nocturnal predatory insect found in still waters near vegetation.

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