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Fish fertilize eggs in relatives' nests



Male cichlid fish sometimes fertilize eggs in nests belonging to one of their relatives, a behavior that is counterintelligent but ultimately beneficial, according to a study published in BMC Biology.

Scientists at the Karl-Franzens-Universität in Graz, Austria, looked at behavior known as stinging in cichlid fish, while men with cats' sexual intercourse would associate with women who are already a social partner of other men. The result is that men are not always the genetic fathers of their descendants. This is often considered a problem for a mother's social partner, especially when she must subsequently look after offspring that are not all of her own. Researchers found that "males with a kitten" and a parent social partner were on average related to what was expected by accident.

Dr. Kristina Sefc, the corresponding author of the study, said: "We found that male male fish often related to some men who are behaving to fertilize some eggs. At first glance, it is evolutionarily mysterious because they are relatives, as a rule we expect them to compete less with each other, not more. This "ties" of related men makes sense, however, when reproduction events involve many men, including a lot of unrelated men, working together to fight the host of unrelated men.

Scientists have concluded that tolerance of relative relativity may sometimes make sense because when men are related, they share some of their genes, and these genes have a chance to pass on to the offspring no matter which man is fertilizing. Importantly, this further exhaustion by relatives may also reduce the number of offspring lost by the other non-original men who participated in reproduction events. In the end, both the original man and his co-worker may benefit.

Dr. Aneesh Bose, co-author of the study, said: "This study has the potential to change our current view of the longevity and loss of paternity." The loss of paternity is widespread over the animal kingdom, but outside the animals living in the close family of the group, the relationship between men and their carers is often "Here we show that men can relate to their carers and it will be exciting to see how this phenomenon has spread to other species."

Scientists have combined theoretical modeling with a detailed genetic study on socially monogamous cichlid fish, Variabilichromis moorii, a species in which both men and women perform parental care. They tested how closely the male fish and their spies were related, in addition to other couples, including women in nutrition, and social partners of men and women. The authors sampled 70 young offspring and were able to reconstruct 74 genotypes.

The authors point out that the empirical part of this study was conducted on one species of fish; therefore, further research is needed to see if the conclusions can be applied by wider ones.

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Notes for Editor:

1. Research article:

Inclusive benefits to improving fitness reduce the cost of pampering socially coupled men

BMC Biology 2019

DOI: 10.1186 / s12915-018-0620-6

Once the embargo has been lifted, the article will be available here:
https:/bmcbiol.biomedical.com /articles /10.1186 /s12915-018-0620-6

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