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Mosquitofish are efficient lovers
September 15, 2013
1:19 pm
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Erich
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Forum Posts: 86
Member Since:
September 30, 2012
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Abstract:

FOR humans sex can be just for fun. For the male Bahamas mosquitofish it is a matter of survival. It seems that these tiny fish have evolved genitalia that are adapted for the quickie.

Justa Heinen-Kay at North Carolina State University and her team caught fish from atolls in the Bahamas. Roughly half came from a group that is prey to larger fish; the rest had few predators.

Males with many predators had significantly smaller gonopodia – the modified fins used for copulation – with longer, bonier tips (Journal of Evolutionary Biology, doi.org/nqg). The small size lets them swim away faster, whereas the rigid tip boosts their accuracy. All in all, it makes for a faster, more productive session.

 

http://www.newscientist.com/ar.....?cmpid=RSS|NSNS|2012-GLOBAL|online-news#.UjWSvj95dQE

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