How females choose the 'right' sperm

[unable to retrieve full-text content]Scientists have revealed how females select the 'right' sperm to fertilize their eggs when faced with the risk of being fertilized by wrong sperm from a different species. Researchers investigated salmon and trout. They found that when eggs from each species are presented with either salmon or trout, they allow fertilization by either species' sperm. But if eggs are given a choice of both species' sperm, they favor their own species'.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/~3/bW6uUSNvJKg/130816094834.htm

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