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Titolo:
Ultrasound avoidance behaviour in the bushcricket Tettigonia viridissima (Orthoptera : Tettigoniidae)
Autore:
Schulze, W; Schul, J;
Indirizzi:
Univ Erlangen Nurnberg, Inst Zool 2, D-91058 Erlangen, Germany Univ Erlangen Nurnberg Erlangen Germany D-91058 -91058 Erlangen, Germany
Titolo Testata:
JOURNAL OF EXPERIMENTAL BIOLOGY
fascicolo: 4, volume: 204, anno: 2001,
pagine: 733 - 740
SICI:
0022-0949(200102)204:4<733:UABITB>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
ECHOLOCATION SIGNALS; PHONOTACTIC BEHAVIOR; ACOUSTIC STARTLE; SONG RECOGNITION; FLYING CRICKETS; NOCTUID MOTHS; BATS; SOUND; FLIGHT; FREQUENCIES;
Keywords:
bat/insect interaction; predator avoidance; hearing; negative phonotaxis; startle behaviour; bushcricket; Tettigonia viridissima;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Schul, J Univ Missouri, Div Biol Sci, 105 Tucker Hall, Columbia, MO 65211 USA Univ Missouri 105 Tucker Hall Columbia MO USA 65211 MO 65211 USA
Citazione:
W. Schulze e J. Schul, "Ultrasound avoidance behaviour in the bushcricket Tettigonia viridissima (Orthoptera : Tettigoniidae)", J EXP BIOL, 204(4), 2001, pp. 733-740

Abstract

The responses of female Tettigonia viridissima to simulated bat echolocation calls were examined during tethered flight. The insects responded with three distinct behaviours, which occurred at graded stimulus intensities. Atlow intensities (threshold 54 dB SPL), T. viridissima responded by steering away from the sound source (negative phonotaxis). At intensities approximately 10 dB higher, beating of the hindwing was interrupted, although the insect remained in the flight posture. A diving response (cessation of the wingbeat, closure of the forewings and alignment of the legs against the body) occurred with a threshold of 76 dB SPL. Considering these thresholds, weestimate that the diving response occurs at approximately the sound amplitude at which many aerial-hawking bats first receive echoes from the insect. The other behaviours probably occur before the bat detects the insect and should therefore be interpreted as early avoidance behaviours,The repertoire of startle responses in T, viridissima, with directional and non-directional components, is similar to those of crickets and moths, but quite different from those described for another bushcricket (Neoconocephalus ensiger), which shows only a non-directional response. This supports the conclusion that bat-evasive behaviours are not conserved within the Tettigoniidae, but instead are shaped by the ecological constraints of the insects.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 09:02:40