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Parental Investment Trends and Strategies in Animals

There seem to be trends within groups of animals regarding types of parental investment.  For example, roughly ninety percent of all mammals display female-only parental care, while the remaining ten percent display both male and female parental care.  There is no example of male-only parental care among any mammal species. Unlike mammals, only about eight percent of birds demonstrate female-only care, while ninety percent of them exhibit care from both parents, and the remaining two percent display male-only care.  Fish are the most variable in their parental investment strategies.  About eighty percent of fish provide no parental care, ten percent demonstrate male-only care, six percent exhibit female-only care, and a minority of four percent display care from both parents (Gross 2005).

~ by fknizner on April 14, 2009.

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