The Development of Respiratory and Diving Ability in the Bottlenose Dolphin Calves of Shark Bay, Western Australia
We examined the development of respiratory and diving competence in 44 wild bottlenose dolphin calves (Tursiops sp) in Shark Bay, Western Australia. Analyses of dive durations, dive patterns, and mother-calf synchrony show that the newborn period (0-4 mos.) is markedly different from all ages with both mother and calf diving only briefly (1 min. or less), suggesting that mothers adjust their diving behavior during this vulnerable period. In addition, calves gradually increased diving competence into the second year of life, as seen in increased dive durations and a greater proportion of deep dives; however, there were little changes in diving ability thereafter, even though the minimum weaning age is three (Mann et al. 2000). Thus, while diving competence may not be the final limit on weaning age it is likely a prerequisite for the development of other behaviors that ultimately limit weaning age.
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Hovis, Kristin (2011-05)One of the most notable and rare features in animal societies is a high degree of fission-fusion (FF) in which individuals change group membership frequently. This temporal-spatial fluidity is presumed to confer reproductive ...
Age Determination, Life History and Juvenile Behavior in Bottlenose Dolphins (Tursiops sp.) in Shark Bay, Australia Krzyszczyk, Ewa Beata (Georgetown University, 2013)Although of theoretical interest, the juvenile period in mammals is a relatively neglected area of research. In large-brained and social mammals, such as bottlenose dolphins, where juvenile periods are prolonged, life ...