"Bighorn ewes have a conservative reproductive tactic and always favor their own body condition over that of their lambs. When resources are limited, ewes appear to transfer reproductive costs to their lambs, as expected from the much greater relative fitness consequences of a reduction in maternal than in offspring survival."
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Parent-offspring survival tradeoffs are worthy to keep In mind when considering extrasomatic over-intestment among some of is humans.
- Julien G. A. Martin and Marco Festa‐Bianchet. 2010. Bighorn Ewes Transfer the Costs of Reproduction to Their Lambs. Am Nat doi: abs/10.1086/656267
