Solitary meat-eaters: solitary, carnivorous carnivorans exhibit the highest degree of sexual size dimorphism.

In contrast, felids do not exhibit a significant trend between litter size and female body size 22 whereas canids exhibits a positive trend between litter size and female body size 22 , 78 .

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Mustelids exhibit a negative trend between litter size (proxy for fecundity) and female body size, suggesting that small female body sizes are favored 27 .

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