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A novel food preference in the greater short-nosed fruit bat, Cynopterus sphinx: mother-pup interaction a strategy for learning

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Ganesh A., Mukilan M., Marimuthu G., Rajan K. E.

Acta Chiropterologica

2016

tom 18

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The greater short-nosed fruit bat Cynopterus sphinx relies on the diverse food resources available in its habitat, with individuals identifying and discriminating between food sources using their sense of smell, in relation to volatile compounds released from fruit, flowers and leaves. The work detailed in this article tested whether pups learn about novel food from interactions with their mothers during foraging and develop preferences. Mother-pup pairs or pups alone were trained during postnatal days (PND) 46–50 using Mangifera indica as a novel fruit. They were then tested during PND 61–65 for food preferences in relation to a known fruit (Achras sapota) and the novel fruit (M. indica). When the trained pups and untrained pups were tested for food preferences independently, those trained with the mother were found to exhibit significantly more marked preferences for the novel fruit as compared with either the pups trained without their mothers or the untrained pups. They made a greater number of feeding attempts and bouts in respect of the novel fruit. However, pups trained without their mothers and untrained pups also both showed a response to the novel fruit during the later period of testing. The results suggest that mother-pup interactions during the early foraging period may provide an opportunity for C. sphinx pups to learn about novel food sources thanks to their mother. Later they may learn independently on the basis of experience from mother's milk and/or social interaction with conspecifics.

Effects of different surfaces on the perception of prey-generated noise by the Indian false vampire bat Megaderma lycra

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Marimuthu G., Rajan K. E., Kandula S., Parsons S., Jones G.

Acta Chiropterologica

2002

tom 04

nr 1

The low- and high-frequency components of a rustling sound, created when prey (freshly killed frog) was jerkily pulled on dry and wet sandy floors and asbestos, were recorded and played back to individual Indian false vampire bats (Megaderma lyra). Megaderma lyra responded with flight toward the speakers and captured dead frogs, that were kept as reward. The spectral peaks were at 8.6, 7.1 and 6.8 kHz for the low-frequency components of the sounds created at the dry, asbestos and wet floors, respectively. The spectral peaks for the high-frequency sounds created on the respective floors were at 36.8, 27.2 and 23.3 kHz. The sound from the dry floor was more intense than that of from the other two substrata. Prey movements that generated sonic or ultrasonic sounds were both sufficient and necessary for the bats to detect and capture prey. The number of successful prey captures was significantly greater for the dry floor sound, especially to its high-frequency components. Bat-responses were low to the wet floor and moderate to the asbestos floor sounds. The bats did not respond to the sound of unrecorded parts of the tape. Even though the bats flew toward the speakers when the prey generated sounds were played back and captured the dead frogs we cannot rule out the possibility of M. lyra using echolocation to localize prey. However, the study indicates that prey that move on dry sandy floor are more vulnerable to predation by M. lyra.

Ograniczanie wyników

2 Acta Chiropterologica

2 Marimuthu G.

2 Rajan K. E.

1 Ganesh A.

1 Jones G.

1 Kandula S.

1 Mukilan M.

1 Parsons S.

1 2016

1 2002

Wyniki wyszukiwania

A novel food preference in the greater short-nosed fruit bat, Cynopterus sphinx: mother-pup interaction a strategy for learning

Effects of different surfaces on the perception of prey-generated noise by the Indian false vampire bat Megaderma lycra