Increased Reproductive Effort with Age in the California Gull (Larus californicus)

See allHide authors and affiliations

Science  15 May 1981:
Vol. 212, Issue 4496, pp. 822-823
DOI: 10.1126/science.212.4496.822


Comparisons of reproductive behaviors of three age classes of California gulls demonstrate that reproductive effort increases with age in this seabird. These findings contradict the assumption that increased reproductive success with age results from increased experience and social status and demonstrate that selection for increased reproductive effort can occur in long-lived species.