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Insights into Blainville's beaked whale (Mesoplodon densirostris) echolocation ontogeny from recordings of mother‐calf pairs
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2016
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Source: Marine Mammal Science, 33(1), 356-364
[PDF-257.02 KB]
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Journal Title:Marine Mammal Science
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Description:Studying the ontogeny of vocal behavior is crucial to understanding the roles that various factors, such as social influence or acoustic environment, play in the development of normal adult vocal repertoires. The literature on vocal development during ontogeny in marine mammals is scant and largely restricted to captive studies, most likely due to the difficulty of definitively identifying vocalizations from young animals that are often closely associated with their mothers or other adults. However, we do know that dolphins can whistle at birth (Caldwell and Caldwell 1979), and that beluga whales (Delphinapterus leucas) vocalize with pulsed trains within an hour after birth (Vergara and Barrett-Lennard 2008). We also know that a neonatal male Yangtze finless porpoise (Neophocaena phocaenoides asiaeorientalis) was first recorded echolocating 22 d postnatal (Li et al. 2007), and two male bottlenose dolphins were recorded echolocating in their fourth postnatal week (Reiss 1988). In one study on bottlenose dolphins, adult females increased their rates of signature whistle production by a factor of ten following the birth of a calf, possibly facilitating the imprinting of the mother's vocal characteristics (Fripp and Tyack 2008). Mother-offspring recognition is likely important in such species where there is either offspring mobility (Sayigh et al. 1990, Smolker et al. 1993), or separation of mother and calf due to foraging requirements. Subantarctic fur seals (Arctocephalus tropicalis), for example, learn their mother's call by the time they are 5 d old, allowing them to find the mother again after her foraging trips (Charrier et al. 2001).
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Source:Marine Mammal Science, 33(1), 356-364
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ISSN:0824-0469;1748-7692;
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Rights Information:Accepted Manuscript
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