Interspecific variation in the size of the nutrient investment made by male butterflies during copulation.

Agriculture & Biology

• copulation 62%
• butterflies 61%
• mating behavior 59%
• interspecific variation 58%
• nutrients 36%
• sexual selection 31%
• Lepidoptera 23%
• prediction 20%
• body weight 19%
• testing 11%

Earth & Environmental Sciences

• copulation 100%
• interspecific variation 86%
• butterfly 71%
• nutrient 39%
• mating behavior 33%
• lepidopteran 16%
• sexual selection 15%
• prediction 5%
• comparison 4%
• material 4%
• test 3%

Medicine & Life Sciences

• Copulation 91%
• Butterflies 86%
• Nutrients 51%
• Body Weight 14%