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Bird-brained? Birds' personalities are correlated with their hormone levels
Date:11/29/2010

h a range of different conditions.

Because higher glucocorticoids are thought to be associated with more intense begging activity, Stwe also examined the begging behaviour of the "fast" and "slow" nestlings. She found no differences between the lines but did observe an interesting difference between the sexes, with male nestlings begging significantly more often than females. Intriguingly, the difference disappeared when the birds were stressed. As Stwe says, "male nestlings beg more to ensure they obtain enough food to meet their higher nutritional needs. But when they are frightened they are much less forward and actually behave just like female nestlings."


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Contact: Dr Mareike Stoewe
mareike.stoewe@vetmeduni.ac.at
43-664-454-1904
University of Veterinary Medicine -- Vienna
Source:Eurekalert

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