Male responses to sperm competition risk associated with increased macronutrient intake and reduced lifespan
Leigh W. Simmons,
Hwei-Ling Chan
Abstract:Increased expenditure on the ejaculate is a taxonomically widespread male response to sperm competition. Increased ejaculate expenditure is assumed to come at a cost to future reproduction, otherwise males should always invest maximally. However, the life-history costs of strategic ejaculation are not well documented. Macronutrient intake is known to affect the trade-off between reproduction and lifespan. Intakes of protein and carbohydrate that maximize reproduction often differ from those that maximize lifes… Show more
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