Data from: Increased reproductive investment associated with greater survival and longevity in Cassin’s auklets

Michael E. Johns, Pete Warzybok, Russell W. Bradley, Jaime Jahncke, Mark Lindberg & Greg A. Breed
Individuals increase lifetime reproductive output through a trade-off between investment in future survival and immediate reproductive success. This pattern may be obscured in certain higher quality individuals that possess greater reproductive potential. The Cassin’s auklet (Ptychoramphus aleuticus) is a long-lived species where some individuals exhibit greater reproductive ability through a behavior called double brooding. Here, we analyze 32 years of breeding histories from marked known-age auklets to test whether double brooding increases lifetime fitness despite...
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These counts follow the COUNTER Code of Practice, meaning that Internet robots and repeats within a certain time frame are excluded.
What does this mean?