Re: Darwin e l
Inviato da fealoro il 1/9/2008 18:21:22
A proposito di speciazione un interessante articolo dell'Economist riprende uno studio che mostra un caso di speciazione tra gli scarabei stercorari:
http://www.economist.com/science/displaystory.cfm?story_id=12001839
interessante la spiegazione proposta:
"Given the need for male and female organs to fit together, the researchers suggest that selection of horn size might be the main method of speciation in Onthophagus. Horn size determines penis size. Penis size then dictates vagina size. That stops crossbreeding between groups and provides the reproductive isolation that groups need to evolve into species. "
http://www.economist.com/science/displaystory.cfm?story_id=12001839
interessante la spiegazione proposta:
"Given the need for male and female organs to fit together, the researchers suggest that selection of horn size might be the main method of speciation in Onthophagus. Horn size determines penis size. Penis size then dictates vagina size. That stops crossbreeding between groups and provides the reproductive isolation that groups need to evolve into species. "
Messaggio orinale: https://old.luogocomune.net/site/newbb/viewtopic.php?forum=54&topic_id=1782&post_id=124706