...Sylvain Losdat; Alfonso Rojas Mora; Caroline Bellut; Rémi Chargé; Valentina Falchi; Gaétan Glauser; Armelle Vallat; Fabrice Helfenstein ABSTRACT Sperm performance is an important component of male reproductive success. However, sperm production is costly and males need to optimize their investment...

... their reproductive success. In their first lactation, mothers with enlarged litters ( n =9, 16 pups) weaned significantly smaller pups, culled more pups, and increased MEO and food intake compared with mothers with reduced litters ( n =9, 5 pups). In the second lactation, no significant differences in pup mass...

..., to their pre-imaginal and/or adult stages. Thus, these ectoparasites should be adapted to environmental conditions in burrows, including high fractional concentrations of CO 2 ( F CO 2 ). We examined how a high F CO 2 (0.04) affected survival and reproductive success of a hematophagous ectoparasite...

...Jon T. Sakata; Sandra L. Vehrencamp SUMMARY Recent experiments in divergent fields of birdsong have revealed that vocal performance is important for reproductive success and under active control by distinct neural circuits. Vocal consistency, the degree to which the spectral properties (e.g...