Abstract
The echolocation calls used by Nyctalus leisleri during search phase in open air space are between 9 and 14 ms long, with the peak energy between 24 and 28 kHz. The pulses are shallowly frequency-modulated with or without an initial steep frequency-modulated component. The diet consists primarily of small flies (Diptera), including many chironomids (wingspan 9–12 mm) and yellow dung flies (Scatophaga; wingspan 24 mm), but also of some larger insects such as dung beetles (Coleoptera; Scarabaeoidea), caddis-flies (Trichoptera) and moths (Lepidoptera). The echo target strength of some prey items was measured. Contrary to models based on standard targets such as spheres or disks, the echo strength of real insects was found to be virtually independent of the emitted frequency within the 20–100 kHz frequency range. A model was used to calculate probable detection distances of the prey by the bat. Using narrow-band calls of 13.7 ± 2.7 ms duration, a bat would detect the two smallest size classes of insect at greatest range using calls of 20 kHz. The results may therefore explain why many species of large and medium sized aerial-hawking bats use low-frequency calls and still eat mostly relatively small insects. The data and model challenges the assumption that small prey are unavailable to bats using low-frequency calls.
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References
Ahlén I (1981) Identification of Scandinavian bats by their sounds. (Ecological report 6) Swedish University of Agricultural Sciences, Department of Wildlife Ecology, Uppsala, Sweden
Barclay RMR (1986) The echolocation calls of hoary (Lasiurus cinereus) and silver-haired (Lasionycteris noctivagans) bats as adaptations for long-versus short-range foraging strategies and the consequences for prey selection. Can J Zool 64:2700–2705
Barclay RMR, Brigham RM (1991) Prey detection, dietary niche breadth, and body size in bats: why are insectivorous bats so small? Am Nat 137:693–703
Bauerová Z, Ruprecht AL (1989) Contribution to the knowledge of the trophic ecology of the parti-coloured bat Vespertilio murinus. Folia Zool 38:227–232
Bazley EN (1976) Sound absorption in air at frequencies up to 100 kHz (Acoustics report Ac 74). National Physics Laboratory
Catto CMC, Hutson AM, Racey PA (1994) The diet of Eptesicus serotinus in southern England. Folia Zool 43:307–314
Chinery M (1986) A field guide to the insects of Britain and western Europe. Collins, London
Coles RB, Guppy A, Anderson ME, Schlegel P (1989) Frequency sensitivity and directional hearing in the gleaning bat, Plecotus auritus. J Comp Physiol A 165:269–280
Dunning DC, Acharya L, Merriman CB, Ferro LD (1992) Interactions between bats and arctiid moths. Can J Zool 70:2218–2223
Fenton MB, Bell GP (1979) Echolocation and feeding behavior in four species of Myotis (Chiroptera). Can J Zool 57:1271–1277
Fenton MB, Bell GP (1981) Recognition of species of insectivorous bats by their echolocation calls. J Mammal 62:233–243
Fullard JH (1987) Sensory ecology and neuroethology of moths and bats: interactions in a global perspective. In: Fenton MB, Racey PA, Rayner JMV (eds) Recent advances in the study of bats. Cambridge University Press, Cambridge, pp 244–272
Griffin DR (1971) The importance of atmospheric attenuation for the echolocation by bats. Anim Behav 19:55–61
Griffin DR, Webster FA, Michael CR (1960) The echolocation of flying insects by bats. Anim Behav 8:141–154
Henson OW Jr (1965) The activity and function of of the middle ear muscles in echolocatiog bats J Physiol 180:871–887
Heller KG (1989) Echolocation calls of Malaysian bats. Z. Säugetierk 54: 1–8
Joermann G von, Schmidt U (1981) Echoortung bei der Vampierfledermaus, Desmodus rotundus. II. Lautaussendung im Flug und Korrelation zum Flugelschlag. Z Säugetierk 46:136–146
Jones G (1990) Prey selection by the greater horseshoe bat (Rhinolophus ferrumeguinum): optimal foraging by echolocation? J Anim Ecol 59:587–602
Jones G (1995) Flight performance, echolocation and foraging behaviour in noctule bats Nyetalus noctula. J Zool Lond 237
Jones G, Corben C (1993) Echolocation calls from six species of microchiropteran bats in south-eastern Queensland. Aust Mammal 16:35–38
Jones G, Parijs SM van (1993) Bimodal echolocation in pipistrelle bats: are cryptic species present? Proc. R Soc Lond 251B: 119–125
Kalko E, Schnitzler H-U (1989) The echolocation and hunting behaviour of Daubenton's bat Myotis daubentoni. Behav Ecol Sociobiol 24:225–238
Kalko E, Schnitzler H-U (1993) Plasticity in echolocation signals of European pipistrelle bats in search flight: implications for habitat use and prey detection. Behav Ecol Sociobiol 33:415–428
Kick SA (1982) Target detection by the echolocating bat, Eptesicus fuscus. J Comp Physiol A 145:432–435
Lawrence BD, Simmons JA (1982) Measurements of atmospheric attenuation at ultrasonic frequencies and the significance for echolocation by bats. J Acoust Soc Am 71:585–590
McAney C, Shiel C, Sullivan C, Fairley J (1991) The analysis of bat droppings (Occasional publication 14). Mammal Society, London
Miller LA (1984) Hearing in green lacewings and their responses to the cries of bats. In: Canard M, Semeria Y, New TR (eds) Biology of Chrysopidae. Junk, Leiden, pp 134–149
Miller LA, Olesen J (1979) Avoidance behaviour in green lacewings. I. Behaviour of free flying green lacewings to hunting bats and ultrasound. J Comp Physiol 131:113–120
Møhl B (1988) Target detection by echolocating bats. In: Nachtigall PE, Moore PWB (eds) Animal sonar: processes and performance. (NATO ASI series A, vol 156). Plenum, New York, pp 435–450
Moss CF, Zagaeski M (1994) Acoustic information available to bats using frequency-modulated sounds for the perception of insect prey. J Acoust Soc Am 95:2745–2756
Neuweiler G, Bruns V, Schuller G (1980) Ears adapted for the detection of motion, or how echolocating bats have exploited the capacities of the mammalian auditory system. J Acoust Soc Am 68:741–753
Neuweiler G, Singh S, Sripathi K (1984) Audiograms of a south Indian bat community. J Comp Physiol A 145:133–142
Novick A (1977) Acoustic orientation. In: Wimsatt WA (ed) Biology of bats, vol 3. Academic Press, New York, pp 73–287
Obrist M, Aldridge HDJN, Fenton MB (1989) Roosting and echolocation behavior of the African bat, Chalinolohus variegatus. J Mammal 70:828–833
Petrusenko AA, Sologor EA (1981) On determination of Chiroptera role in ecosystems of the Middle Dsieper area (in Russian). Vestnik Zool 6:44–47
Pye JD (1993) Is fidelity futile? The “true” signal is illusory, especially with ultrasound. Bioacoustics 4:271–286
Roeder KD (1962) The behavior of free flying moths in the presence of artificial ultrasonic pulses. Anim Behav 10:300–304
Roeder KD (1963) Echoes of ultrasonic pulses from flying moths. Biol Bull 124:200–210
Roeder KD, Treat AE (1962) The acoustic detection of bats by moths. In: Proceedings of the 1 1th International Entomological Conference, Wien, vol 3, pp 7–11
Rosenzweig ML (1968) The strategy of body size in mammalian carnivores. Am Midl Nat 80:299–315
Royal Entomological Society (1949–1993) The handbook for the identification of British insects Vols 1–10. Royal Entomological Society, London
Rydell J (1989) Food habits of northern (Eptesicus nilssoni) and brown long-eared (Plecotus auritus) bats in Sweden. Holarct Ecol 12:16–20
Rydell J (1992a) The diet of the parti-coloured bat Vespertilio murinus in Sweden. Ecography 5:195–198
Rydell J (1992b) Occurrence of bats in northernmost Sweden (65°N) and their feeding ecology in summer. J Zool Lond 227: 517–529
Schnitzler H-U (1968) Die Ultraschall-Ortungslaute der Hufeisen-Fledermäuse (Chiroptera — Rhinolophidae) in verschiedenen Orientierungssituationen. Z Vergl Physiol 57:376–408
Schnitzler H-U (1987) Echoes of fluttering insects: information for echolocating bats. In: Fenton MB, Racey PA, Rayner JMV (eds) Recent advances in the study of bats. Cambridge University Press, Cambridge, pp 226–243
Schnitzler H-U, Kalko E, Kober R, Heblich K (1983) The acoustical image of fluttering insects in echolocating bats. In: Nachtigall PE, Moore PWB (eds) Animal sonar: processes and performance (NATO ASI Series A, vol 156). Plenum, New York, pp 619–624
Schnitzler H-U, Kalko E, Miller L, Surlykke A (1987) The echolocation and hunting behaviour of the bat Pipistrellus kuhli. J Comp Physiol A 161:267–274
Schnitzler H-U, Kalko E, Miller LA, Surlykke A (1988) How the bat Pipistrellus kuhlii hunts for insects. In: Nachtigall PE, Moore PWB (eds) Animal sonar: processes and performance. (NATO ASI Series A, vol 156). Plenum, New York, pp 435–450
Shimozova T, Suga N, Hendler P, Schultze S (1974) Directional sensitivity of echolocation systems in bats producing frequency modulated signals. J Exp Biol 60:53–69
Simmons JA, Ferragamo M, Moss CF, Stevenson SB, Altes RA (1990) Discrimination of jittered sonar echoes by the echolocating bat, Eptesicus fuscus: The shape of target images in echolocation. J Comp Physiol A 167:589–616
Sologor EA (1980) The study of the diet of Vespertilio serotinus. In: Kuzyallin AP, Panyutin KK (eds) Bats (Chiroptera). Naulea, Moscow 188–190 (in Russian)
Stapells DR, Picton TW, Smith AD (1982) Normal hearing thresholds for clicks. J Acoust Soc Am 72: 13–25
Suga N, Jen PH-S (1975) Peripheral control of acoustic signals in the auditory system of echolocating bats. J Exp Biol 62: 277–311
Suga N, Schlegel P (1972) Neural attenuation of responses to emitted sounds in echolocating bats. Science 177:82–84
Sullivan CM, Shiel CB, McAney CM, Fairley JS (1993) Analysis of the diets of Leisler's Nyctalus leisleri, Daubenton's Myotis daubentoni and pipistrelle Pipistrellus pipistrellus bats in Ireland. J Zool Lond 231:656–663
Surlykke A, Miller LA, Møhl B, Andersen BB, Christensen-Dalsgaard J, Jørgensen B (1993) Echolocation in two very small bats from Thailand: Craseonycteris thonglongyai and Myotis siligorensis. Behav Ecol Sociobiol 33:1–12
Swift SM, Racey PA, Avery MI (1985) Feeding ecology of Pipistrellus pipistrellus (Chiroptera: Vespertilionidae) during pregnancy and lactation. II. Diet. J Anim Ecol 54:217–225
Waters DA, Jones G (1995) Echolocation call structure and intensity in five species of insectivorous bats. J Exp Biol 198: 475–489
Whitaker JO Jr (1988) Food habits of insectivorous bats. In: Kunz TH (ed) Ecological and behavioral methods for the study of bats. Smithsonian Institution, Washington DC, pp 171–189
Zingg PE (1990) Akustische Artidentifikation von Fledermäusen (Mammalia: Chiroptera) in der Schweiz. Rev Suisse Zool 97:263–294
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Waters, D.A., Rydell, J. & Jones, G. Echolocation call design and limits on prey size: a case study using the aerial-hawking bat Nyctalus leisleri . Behav Ecol Sociobiol 37, 321–328 (1995). https://doi.org/10.1007/BF00174136
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DOI: https://doi.org/10.1007/BF00174136