For some species, an upside to inbreeding

Discussions on cichlid behaviour in nature & captivity.

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For some species, an upside to inbreeding

Post by Lisachromis » Tue Feb 06, 2007 12:33 pm

Saw this at: ... 020107.php . Any comments? (except for the obvious spelling mistake on taeniatus)

For some species, an upside to inbreeding

Although breeding between close kin is thought to be generally unfavorable from an evolutionary standpoint, in part because harmful mutations are more easily propagated through populations in this way, theory predicts that under some circumstances, the benefits of inbreeding may outweigh the costs. Researchers have now reported real-life evidence in support of this theory. Studying an African chiclid fish species, Pelvicachromis taetiatus, in which both parents participate in brood care, the researchers found that individuals preferred mating with unfamiliar close kin rather than non-kin. Because parental work is energetically costly, and kinship generally favors cooperation, one possible explanation for kin preference in breeding in this species is that it offers a benefit by facilitating parental cooperation. And indeed, observations of behavior exhibited by this chiclid species showed that related parents were more cooperative and invested more resources in parenting than did non-related parents. Together, the findings suggest that, somewhat unusually, active inbreeding is advantageous in this fish species. The findings, reported by Timo Thünken and colleagues of the University of Bonn, appear in the February 6th issue of Current Biology.

The researchers include: Timo Thünken, Theo C.M. Bakker, Sebastian A. Baldauf, and Harald Kullmann of the University of Bonn in Bonn, Germany. The work was funded by the Deutsche Forschungsgemeinschaft (DFG) (Ba 2885/2-1).

Thünken et al.: "Active Inbreeding in a Cichlid Fish and Its Adaptive Significance". Publishing in Current Biology 17, 225–229, February 6, 2007 DOI 10.1016/j.cub.2006.11.053.

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Post by Dan Woodland » Tue Feb 06, 2007 12:53 pm

Sounds fishy :lol:, but if it is the case, that is a selection those fish made, not breeders looking for the next beg pay day! In other words keep this report in perspective and in context. Dan

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michi tobler
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Post by michi tobler » Tue Feb 06, 2007 1:33 pm

Looks like a cool study and kind of makes sense. I'm not through reading it yet though...

Cheers, m
Humans are not the pinnacle of evolutionary progress but only an aberrant side branch of fish evolution - Moyle


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