The American Naturalist, Volume 161

allocation American Naturalist analysis ANOVA behavior bifurcation Biology birds body mass breeder breeding butterfly changes chemical clade coexistence conspecific correlated costs Daphnia Darwinian extinction distribution diversity Drosophila dumpers dynamics Ecology effects egg dumping empty inflorescences endophyte equation estimates eusociality evolution evolutionary Evolutionary Biology evolved experimental experiments females fitness forager frequency function genes genetic genotype geographic range gradient habitat Hamilton's rule haplotypes helper herbivores host hypothesis inclusive fitness increase individuals infected inflorescences interactions Journal life-history variables lizards longevity males mtDNA natural selection NDVI Neotyphodium nest niche Oecologia offspring optimal parameters patch patterns phenotypic phylogenetic phylogeny phytoplankton plant population density predator predicted prey range sizes region regression relatedness relationship relative reproductive response sex ratio significant slope spatial specialization species richness studies temperature territory trade-offs traits ulation University Press values variance variation Wolbachia worker caste