The role of infant isolation calls in mother–infant reunions in the little brown bat, <i>Myotis lucifugus</i> (Chiroptera: Vespertilionidae)

Thomson, C.; Fenton, M. Brock; Barclay, Robert M. R.

doi:10.1139/z85-290

Cited by 39 publications

(19 citation statements)

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“…These curved type social calls function as 'isolation calls' and additionally as 'direction calls' (Fenton, 1985) whereby after foraging, female bats are able to find and recognize their pups among many individuals in the colony. A presupposition for acoustic recognition through individual calls is a very high variability of the calls, which was detected in this type of social call for several bat species (Brown, 1976;Kolb, 1981;Schmidt et al, 1981;Rother & Schmidt, 1985;Thomson et al, 1985;Balcombe, 1990;Jones et al, 1991;Scherrer & Wilkinson, 1993). Variability and the possibility for discrimination rely on the sonagraphic parameters dur, freq, fmax and fmin (Gelfand & McCracken, 1986;Jones et al, 1991;Scherrer & Wilkinson, 1993), as was measured in the present work in M. myotis and in E. serotinus.…”

Section: Discussionsupporting

confidence: 58%

“…A presupposition for acoustic recognition of individuals is the high variability of their calls. Individual specific frequency structures of isolation calls were recognized in the colonial bats Antrozous pallidus (Brown, 1976), Desmodus rotundus (Schmidt, Joermann & Schmidt, 1981), Myotis myotis (Kolb, 1981), M. lucifugus (Thomson, Fenton & Barclay, 1985), Phyllostomus discolor (Rother & Schmidt, 1985), Plecotus auritus (De Fanis & Jones, 1995), T. brasiliensis mexicana (Balcombe, 1990), Pipistrellus pipistrellus s. l. (Jones et al, 1991) and in Nycticeius humeralis (Scherrer & Wilkinson, 1993).…”

Section: Introductionmentioning

confidence: 99%

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Structure and variability of bat social calls: implications for specificity and individual recognition

2003

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Communication sounds or 'social calls' of 16 European bat species (Chiroptera, Vespertilionidae) were recorded at a range of roost and foraging sites. A comparative analysis of more than 5400 individual calls for general structures and for inter-as well as intraspecific variability resulted in 50 types of calls, which differed by their specific structure and by the calling species. These types could be grouped into four different general types of calls, according to the kind and complexity of their structure, independent of the calling species. Distinct types of calls seem to have similar functions in different bat species. One general type may be used predominantly in female-infant interactions as an isolation or direction call, which serves as mutual recognition. This type of social call was also used in 'tandem flights' of pairs of bats, which might increase individual knowledge of roost sites and foraging success. A second type was used in mate attraction, and a further one in an aggressive context. The fourth one was used by hindered or distressed bats. The group of 'aggressive' calls is least variable, but the complex mating calls and isolation calls are very diverse. Species-specific sound structures were identified, which allowed a computational species distinction. The measured inter-individual variability of social calls should be significant for their functions in individual recognition. So, beyond common features concerning the frequency structure of bat social calls, interspecific differences, as well as the intraspecific variability of details of sonagraphic parameters, should elucidate the specific functions of the calls.

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Section: Discussionsupporting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Structure and variability of bat social calls: implications for specificity and individual recognition

2003

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“…DNA fingerprinting confirmed the assumption that suckling is discriminate in Myotis lucifugus (Thomson et al 1985), because the percentage band-sharing of DNA fingerprints from pairwise comparisons of presumed mother to young was significantly higher than all other groups. This finding is expected because mammals producing a single offspring usually nurse selectively (Packer et al 1992).…”

Section: Discussionsupporting

confidence: 59%

DNA fingerprinting provides evidence of discriminate suckling and non‐random mating in little brown bats Myotis lucifugus

Watt

Fenton

1995

Molecular Ecology

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Recent advances in DNA extraction and fingerprinting techniques allowed examination of genetic similarity of groups of Myotis lucifugus at maternity roosts. Mean percentage band-sharing between young was significantly higher than between mothers, suggesting fertilization success skewed for individual males or male lineages. Mean percentage band-sharing between presumed mothers and young was significantly higher than band-sharing between all other groups, suggesting that Myotis lucifugus preferentially suckle their own young.

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“…twin pairs; [55]). Various studies tested the significance of vocal signatures for mother-offspring recognition through playback experiments, in which previously recorded isolation calls from different pups were broadcast to their respective mothers [5], [56], [57].…”

Section: Discussionmentioning

confidence: 99%

Different Auditory Feedback Control for Echolocation and Communication in Horseshoe Bats

2013

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Auditory feedback from the animal's own voice is essential during bat echolocation: to optimize signal detection, bats continuously adjust various call parameters in response to changing echo signals. Auditory feedback seems also necessary for controlling many bat communication calls, although it remains unclear how auditory feedback control differs in echolocation and communication. We tackled this question by analyzing echolocation and communication in greater horseshoe bats, whose echolocation pulses are dominated by a constant frequency component that matches the frequency range they hear best. To maintain echoes within this “auditory fovea”, horseshoe bats constantly adjust their echolocation call frequency depending on the frequency of the returning echo signal. This Doppler-shift compensation (DSC) behavior represents one of the most precise forms of sensory-motor feedback known. We examined the variability of echolocation pulses emitted at rest (resting frequencies, RFs) and one type of communication signal which resembles an echolocation pulse but is much shorter (short constant frequency communication calls, SCFs) and produced only during social interactions. We found that while RFs varied from day to day, corroborating earlier studies in other constant frequency bats, SCF-frequencies remained unchanged. In addition, RFs overlapped for some bats whereas SCF-frequencies were always distinctly different. This indicates that auditory feedback during echolocation changed with varying RFs but remained constant or may have been absent during emission of SCF calls for communication. This fundamentally different feedback mechanism for echolocation and communication may have enabled these bats to use SCF calls for individual recognition whereas they adjusted RF calls to accommodate the daily shifts of their auditory fovea.

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The role of infant isolation calls in mother–infant reunions in the little brown bat, Myotis lucifugus (Chiroptera: Vespertilionidae)

Cited by 39 publications

References 0 publications

Structure and variability of bat social calls: implications for specificity and individual recognition

Structure and variability of bat social calls: implications for specificity and individual recognition

DNA fingerprinting provides evidence of discriminate suckling and non‐random mating in little brown bats Myotis lucifugus

Different Auditory Feedback Control for Echolocation and Communication in Horseshoe Bats

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