Reproductive phenology is a repeatable, heritable trait linked to the timing of other life-history events in a migratory marine predator.

Abstract excerpt

Population-level shifts in reproductive phenology in response to environmental change are common, but whether individual-level responses are modified by demographic and genetic factors remains less well understood. We used mixed models to quantify how reproductive timing varied across 1772 female southern elephant seals (Mirounga leonina) breeding at Marion Island in the Southern Ocean (1989-2019), and to...

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