Data from: Silk wrapping of nuptial gifts aids cheating behaviour in male spiders

Paolo Giovanni Ghislandi, Michelle Beyer, Patricia Velado & Cristina Tuni
Sexual traits, such as nuptial gifts, are costly and often condition-dependent. Males should be under selection to reduce these costs without impairing their reproductive success. Spider gifts consist of silk-wrapped food, but may also consist of worthless (non-nutritive) donations that successfully lead to mating, despite yielding shorter copulations. Worthless gifts may either represent a cheaper cheating strategy or the inability to produce genuine gifts due to resource limitations (i.e. poor body condition). Unless energetic constraints...
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