Parental Care
Studies were also done to examine the amount of contribution the male pied flycatcher provided in parental care as well as why some females choose to mate with mated males. When older and younger monogamous males were compared, there was no difference in feeding rate between each nest. When females were studied, scientists found that monogamous and primary females benefited significantly more from the male in terms of parental care than polygynous females did. The latter group could only partially compensate for the absence of a male, leading to secondary females and widows raising fewer offspring than the monogamous pairs did. In the study, differences in mates and the qualities of the territories were slight and therefore not considered, since they lead to no advantages for females to choose between the territories belonging to monogamous or already-mated males. The results of the study suggest that the males can control multiple territories and are thus able to deceive females into accepting polygyny, while the females do not have enough time to discover the marital status of the males.
In terms of male parental care to clutches, the rate of male incubation feeding was directly related to the physical condition of the males, and negatively correlated with the ambient temperature. Polygynously mated females also received far less feeds than monogamously mated females, despite having no difference in the food delivery rates by the male. The reduction in delivery rate to the polygynously mated females led to a negative effect on their incubation efficiency, because the females needed to spend more time away from the nest acquiring food. This also prolonged the incubation period when compared to monogamous females. The male feeding behavior is related to the reproductive value as represented by the nests, as well as to the costs and benefits of incubation feeding.
Read more about this topic: European Pied Flycatcher
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