Asymmetric sibling rivalry and nestling growth in red-winged blackbirds (Agelaius phoeniceus) S. ForbesB. Glassey Original Article Pages: 413 - 417
The formation and maintenance of crayfish hierarchies: behavioral and self-structuring properties C. GoessmannC. HemelrijkR. Huber Original Article Pages: 418 - 428
The effect of pup vocalisations on food allocation in a cooperative mammal, the meerkat (Suricata suricatta) M. B. ManserG. Avey Original Article Pages: 429 - 437
Display rate by male fairy-wrens (Malurus cyaneus) during the fertile period of females has little influence on extra-pair mate choice D. J. GreenH. L. OsmondA. Cockburn Original Article Pages: 438 - 446
Sperm precedence, mating interval, and a novel mechanism of paternity bias in a beetle (Tenebrio molitor L.) J. M. DrnevichE. F. HayesR. L. Rutowski Original Article Pages: 447 - 451
Parental condition, brood sex ratio and differential young survival: an experimental study in gulls (Larus fuscus) R. G. NagerP. MonaghanM. Genovart Original Article Pages: 452 - 457
Trade-off between fitness components in males of the polygynous butterfly Callophrys xami (Lycaenidae): the effect of multiple mating on longevity C. Cordero Original Article Pages: 458 - 462
The use of incubation behavior to adjust avian reproductive costs after egg laying K. L. WiebeK. Martin Original Article Pages: 463 - 470
Reproductive suppression and inbreeding avoidance in wild populations of co-operatively breeding meerkats (Suricata suricatta) M. J. O’RiainN. C. BennettT. H. Clutton-Brock Original Article Pages: 471 - 477
The independent origin of a queen number bottleneck that promotes cooperation in the African swarm-founding wasp, Polybioides tabidus M. T. HenshawJ. E. StrassmannD. C. Queller Original Article Pages: 478 - 483
Size-based predation by kookaburras (Dacelo novaeguineae) on lizards (Eulamprus tympanum: Scincidae): what determines prey vulnerability? S. P. BlombergR. Shine Original Article Pages: 484 - 489
