Data from: Experimental food supplementation reveals habitat-dependent male reproductive investment in a migratory bird
Kaiser, Sara A., Cornell University
Sillett, T. Scott, National Zoological Park
Risk, Benjamin B., Cornell University
Webster, Michael S., Cornell University
Published Jan 15, 2015 on Dryad.
Cite this dataset
Kaiser, Sara A.; Sillett, T. Scott; Risk, Benjamin B.; Webster, Michael S. (2015). Data from: Experimental food supplementation reveals habitat-dependent male reproductive investment in a migratory bird [Dataset]. Dryad. https://doi.org/10.5061/dryad.t34m9
Environmental factors can shape reproductive investment strategies and influence the variance in male mating success. Environmental effects on extrapair paternity have traditionally been ascribed to aspects of the social environment, such as breeding density and synchrony. However, social factors are often confounded with habitat quality and are challenging to disentangle. We used both natural variation in habitat quality and a food supplementation experiment to separate the effects of food availability—one key aspect of habitat quality—on extrapair paternity (EPP) and reproductive success in the black-throated blue warbler, Setophaga caerulescens. High natural food availability was associated with higher within-pair paternity (WPP) and fledging two broods late in the breeding season, but lower EPP. Food-supplemented males had higher WPP leading to higher reproductive success relative to controls, and when in low-quality habitat, food-supplemented males were more likely to fledge two broods but less likely to gain EPP. Our results demonstrate that food availability affects trade-offs in reproductive activities. When food constraints are reduced, males invest in WPP at the expense of EPP. These findings imply that environmental change could alter how individuals allocate their resources and affect the selective environment that drives variation in male mating success.
WPP Model Table 1
Dataset supporting the results examining the effects of natural variation in food availability on within-pair paternity (Table 1 Model 1).
EPP Model Table 1
Dataset supporting the results examining the effects of natural variation in food availability on extrapair paternity (Table 1 Model 2).
Double brooding Model Table 1
Dataset supporting the results examining the effects of natural variation in food availability on double brooding (Table 1 Model 3).
Dataset supporting the results examining the effects of food supplementation on within-pair paternity, extrapair paternity, double brooding and total reproductive success (Table 2 Models 1-4).
Dataset supporting the results investigating the relative contribution of within-pair paternity, extrapair paternity and double brooding on total reproductive success (Figure 2).