Increased environmental sensitivity of the larger sex has been reported in several size-dimorphic vertebrate species. It is generally assumed that this is due to a higher energy demand of the larger sex, thus increasing susceptibility to food shortage. However, sex-specific growth rates might...

The application of Microsoft Excel Solver routines to analyze data from a thermal-probe placed in a number of samples is described. The successful application of the Solver routine to the thermal-probe temperature time data requires the selection of an appropriate time-interval. The various...

How and why do the mating opportunities of males and females differ in natural population of animals? Previously we showed that females have higher mating opportunities than males in the Kentish plover Charadrius alexandrinus. Both parents incubate the eggs, and males provide more brood care...

The larger sex is often more vulnerable, in terms of development and survival, to poor conditions during early life. Differential vulnerability has implications for parental investment strategies such as sex ratio theory. When males are larger, it is not possible to separate the effects of...