Isolation call ontogeny in bat pups (Glossophaga soricina)
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Bat pups produce isolation calls to solicit maternal care. During maturation, pup isolation calls may gradually develop into echolocation calls or exist in parallel to them, depending on the species involved. We studied the ontogeny of isolation calls in nectivorous bats, Glossophaga soricina. Isolation calls of G. soricina pups were frequency modulated calls uttered in bouts of varying length. Newborn pups already produced both isolation calls and echolocation call precursors (which developed into ‘normal’ echolocation calls), indicating that isolation calls of G. soricina pups occur independently and exist in parallel to echolocation calls during ontogeny. We found strong statistical evidence for an individual signature encoded in isolation calls. Moreover, we provide evidence for considerable changes in isolation call parameters over a short ontogenetic time span. Throughout ontogeny, the call interval decreased significantly whereas most frequency parameters increased significantly and call entropy rose (i.e., isolation calls became less tonal but noisier).
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Isolation call ontogeny in bat pups (Glossophaga soricina)
In: BehaviourSearch for other papers by Sina Engler in
Current site
Google Scholar
PubMed
Search for other papers by Andreas Rose in
Current site
Google Scholar
PubMed
dSmithsonian Tropical Research Institute, Building 401 Tupper, Luis Clement Avenue, Balboa Ancon, Panama, Republic of Panama
Search for other papers by Mirjam Knörnschild in
Current site
Google Scholar
PubMed
Bat pups produce isolation calls to solicit maternal care. During maturation, pup isolation calls may gradually develop into echolocation calls or exist in parallel to them, depending on the species involved. We studied the ontogeny of isolation calls in nectivorous bats, Glossophaga soricina. Isolation calls of G. soricina pups were frequency modulated calls uttered in bouts of varying length. Newborn pups already produced both isolation calls and echolocation call precursors (which developed into ‘normal’ echolocation calls), indicating that isolation calls of G. soricina pups occur independently and exist in parallel to echolocation calls during ontogeny. We found strong statistical evidence for an individual signature encoded in isolation calls. Moreover, we provide evidence for considerable changes in isolation call parameters over a short ontogenetic time span. Throughout ontogeny, the call interval decreased significantly whereas most frequency parameters increased significantly and call entropy rose (i.e., isolation calls became less tonal but noisier).
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 895 | 113 | 8 |
| Full Text Views | 235 | 6 | 2 |
| PDF Views & Downloads | 94 | 15 | 4 |
