Post Profile

All-female hybrid fish species ?uses? males for better genetics

Some species are comprised of female-only members, giving themselves a competitive advantage over species that produce both male and female offspring. Since the females are capable of bearing offspring, they can quickly outnumber other species in which half the population – the males – do not. However, these all-female species are disadvantaged due to a lack of variety in their gene composition.
read more


Related Posts

'Casanova gene' in female songbirds: Females inherit 'infidelity gene' from their fathers

Academics / General Science : ScienceDaily: Science Society

It is assumed that many bird species are monogamous, yet infidelity is a widespread phenomenon. The advantage for the male seems obvious as in this way he can increase the number of his offspring. A female, however, mostly faces cos...

Females protect offspring from infanticide by forcing males to compete through sperm

Academics / General Science : Science Codex

Previous research has shown that infanticide by males is widespread in many mammal species, but most commonly occurs in those species where females live in social groups dominated by one or a few males. Outsiders will fight dominant...

Promiscuity and sperm selection improves genetic quality in birds

Academics / General Science : ScienceDaily: Science Society

Research shows that females can maximize the genetic quality of their offspring by being promiscuous. Researchers studied red junglefowl and found that mating with different males helps females produce healthier offspring -- due to ...

Flexible gene expression may regulate social status in male fish

Academics / General Science : Science Codex

For a small African fish species, a colorful dominant male does better in life, winning access to food and females. New research by Stanford biologists suggests that this lucky outcome is regulated at a genetic level, by turning gen...

All-female hybrid fish species 'uses' males for better genetics

Issues & Causes / Climate Change : EurekAlert: Earth

(Hokkaido University) A hybrid species of all-female fish in the north Pacific Ocean may have survived for an uncharacteristically long period of time by switching mating species.


Copyright © 2016 Regator, LLC