Experimental evidence of long-term reproductive costs in a colonial nesting seabird
Trade-offs between current and future reproduction are central to the evolution of life histories. Experiments that manipulate brood size provide an effective approach to investigating future costs of current reproduction. Most manipulative studies to date, however, have addressed only the short-term effects of brood size manipulation. Our goal was to determine whether survival or breeding costs of reproduction in a long-lived species manifest beyond the subsequent breeding season. To this end, we investigated long-term survival and breeding effects of a multi-year reproductive cost experiment conducted on black-legged kittiwakes Rissa tridactyla, a long-lived colonial nesting seabird. We used multi-state capture–recapture modeling to assess hypotheses regarding the role of experimentally reduced breeding effort and other factors, including climate phase and colony size and productivity, on future survival and breeding probabilities during the 16-yr period following the experiment. We found that forced nest failures had a positive effect on breeding probability over time, but had no effect on long-term survival. This apparent canalization of survival suggests that adult survival is the most important parameter influencing fitness in this long-lived species, and that adults should pay reproductive costs in ways that do not compromise this critical life history parameter. When declines in adult survival rate are observed, they may indicate populations of conservation concern.
Citation Information
Publication Year | 2018 |
---|---|
Title | Experimental evidence of long-term reproductive costs in a colonial nesting seabird |
DOI | 10.1111/jav.01779 |
Authors | Aly McKnight, Erik J. Blomberg, Gregory H. Golet, David B. Irons, Cyndy Loftin, Shawn T. McKinney |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Journal of Avian Biology |
Index ID | 70227705 |
Record Source | USGS Publications Warehouse |
USGS Organization | Coop Res Unit Leetown |