Cooperation in breeding by nonreproductive wrens: kinship, reciprocity, and demography Kerry N. Rabenold OriginalPaper Pages: 1 - 17
Reproductive enhancement by helpers and an experimental inquiry into its mechanism in the bicolored wren Steven N. AustadKerry N. Rabenold OriginalPaper Pages: 19 - 27
A radiotracer technique for the determination of male mating success in natural populations Micholle Pellissier ScottT. N. Tan OriginalPaper Pages: 29 - 33
Between-caste aversion as a basis for division of labor in the ant Pheidole pubiventris (Hymenoptera: Formicidae) Edward O. Wilson OriginalPaper Pages: 35 - 37
Shared paternity in the acorn woodpecker (Melanerpes formicivorus) Nancy JosteJ. David LigonPeter B. Stacey OriginalPaper Pages: 39 - 41
Parental investment decision rules and the Concorde fallacy Robert Craig SargentMart R. Gross OriginalPaper Pages: 43 - 45
Mating patterns of woolly spider monkeys, Brachyteles arachnoides: implications for female choice Katharine Milton OriginalPaper Pages: 53 - 59
Honeybees maximize efficiency by not filling their crop Paul Schmid-HempelAlejandro KacelnikAlasdair I. Houston OriginalPaper Pages: 61 - 66
Food delivery and sibling competition in experimentally even-aged broods of the cattle egret Masahiro Fujioka OriginalPaper Pages: 67 - 74
Kinship and incompatibility between colonies of the acacia ant Pseudomyrmex ferruginea Alex MintzerS. B. Vinson OriginalPaper Pages: 75 - 78
Social spiders catch larger prey: a study of Anelosimus eximius (Araneae: Theridiidae) Wolfgang Nentwig OriginalPaper Pages: 79 - 85
Inheritance of dominance in honeybees (Apis mellifera capensis Esch.) Robin F. A. MoritzElke Hillesheim OriginalPaper Pages: 87 - 89
