Flexible foraging strategy of Cory's shearwater, Calonectris diomedea, during the chick-rearing period

Article Abstract:

A periodic weighing protocol and automatic logging of parental attendance to chicks were used in the investigation of the foraging strategy of Cory's shearwater, Calonectris diomedea, while rearing their young. Results reveal that these birds engage in a flexible foraging strategy during periods of food scarcity. Parents engage in short and long foraging trips. Long foraging trips had no benefits to the chicks. This flexible foraging strategy can be interpreted as a compromise between providing food for the chicks and increasing parental fitness.

Food and nutrition, Birds, Shearwaters

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Female fifteen-spined sticklebacks prefer better fathers

Article Abstract:

Variation in paternal competence, display of paternal behavior and the influence of these traits on mating success were investigated in fifteen-spined sticklebacks, Spinachia spinachia. Males display displacement fanning and body shaking during courtship and these were found to be positively correlated with fanning behavior and reproductive success during the parental phase of egg rearing. Females were shown to prefer males that exhibit better paternal behavior.

Sexual selection in animals, Sexual selection (Natural selection), Sticklebacks

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• Abstracts: Mode of fertilization and parental care in anurans. Porcine sex ratios and sex combinations within litters: comment on Meikle et al. (1997) and Mendl et al. (1997)

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