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Bioacoustic articles in Behaviour 146 no. 2 (February 2009) & no. 3 (Mar

To: "Bioacoustic-L" <>
Subject: Bioacoustic articles in Behaviour 146 no. 2 (February 2009) & no. 3 (March 2009)
From: "Frank Veit" <>
Date: Thu, 19 Feb 2009 22:53:49 +0100
Abstracts below

Behaviour 146 Vol. 2 (February)
http://www.ingentaconnect.com/content/brill/beh/2009/00000146/00000002

Ursprung, E, M Ringler & W Hodl (2009) Phonotactic approach pattern in the neotropical frog Allobates femoralis: A spatial and temporal analysis. Behaviour 146: 153-170.

Adams, DM, TJS Balsby & JW Bradbury (2009) The function of double chees in orange-fronted conures (Aratinga canicularis; Psittacidae). Behaviour 146: 171-188

Behaviour 146 Vol. 3 (March)
http://www.ingentaconnect.com/content/brill/beh/2009/00000146/00000003

Ramseyer, A, O Petit & B Thierry (2009) Decision-making in group departures of female domestic geese. Behaviour 146: 351-371.

Vanderhoff, EN & PK Eason (2009) The response of American robins (Turdus migratorius) to aerial alarms. Behaviour 146: 415-427.

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Abstracts:

Ursprung, E, M Ringler & W Hodl (2009) Phonotactic approach pattern in the neotropical frog Allobates femoralis: A spatial and temporal analysis. Behaviour 146: 153-170. Phonotactic approaches by 17 male Allobates femoralis were videotaped and analysed in terms of spatial and temporal patterns to assess this species' ability to localise sound. Jump angles of consecutive jumps and the straightness of paths were measured to quantify the accuracy of approach. The effect of interbout intervals on phonotactic approach was examined by comparing movement parameters of two tests, using a standard call with interbout intervals, and a continuous call without interbout intervals. Phonotactic approach occurred almost exclusively during calling bouts. Interbout intervals interrupted movement and did not alter the accuracy of approach. Our results suggest that only the calling bouts, but not the silent interbout intervals, play a crucial role for male phonotaxis in this species. Furthermore, anuran phonotactic approach is not strictly axis-alternated and, thus, not appropriately described by the generally used term 'zig-zagging'.


Adams, DM, TJS Balsby & JW Bradbury (2009) The function of double chees in orange-fronted conures (Aratinga canicularis; Psittacidae). Behaviour 146: 171-188 Orange-fronted conures use individually distinctive contact calls (chees) to mediate social interactions. During vocal exchanges, individuals are known to imitate each other's contact calls. Chees are most often given singularly, but also occur in doublets, known as double chees. We used interactive playback to assess the function of double chees in imitative contexts. By using stimuli with varying levels of similarity between the chees within a double chee, we found that wild-caught conures held for short periods in an aviary imitate the second chee of the double chee more than the first chee. This suggests that the more relevant information in mediating the exchange is contained in the second chee, and the first serves some alternative function. Double chees do not increase the overall intensity of an interaction, nor do they improve the overall accuracy of imitation. However, double chees may serve a role in signaling and directing changes during chee exchanges.

Ramseyer, A, O Petit & B Thierry (2009) Decision-making in group departures of female domestic geese. Behaviour 146: 351-371. Group-living animals have to make trade-offs to reach consensus and travel together. We investigated the recruitment processes underpinning decision-making at departure in a group of 20 female domestic geese (Anser domesticus) kept in semi-free-range conditions. Two observers continuously videotaped the behaviours of the birds. Data were analyzed using multiple regression analyses. We found that decision-making was a continuous and distributed process. Departure was preceded by an increase in the arousal state of group members and their initial orientation influenced recruitment. Patterns of group movement could be predicted from the behaviours of individuals before departure. Individuals' locations, moves and signals could act as passive or communicative cues. A higher number of vocalisations and arousal behaviours led to a larger number of individuals recruited. Some individuals were more efficient than others in recruiting followers but any geese could initiate a movement. First movers recruited a higher number of mates when they had a greater number of neighbours. Not only the first mover but also the behaviours of the second and third movers prompted further individuals to follow. There was no evidence that geese were able to intentionally recruit others, rather they synchronized and adjusted each other's motives until reaching a consensus.

Vanderhoff, EN & PK Eason (2009) The response of American robins (Turdus migratorius) to aerial alarms. Behaviour 146: 415-427. Alarm calls are important signals that allow individuals to convey information about both predator type and risk level. How individuals respond to these calls may depend on both the intensity of the call as well as the age of the responder. We investigated an aerial alarm call of the American robin and specifically examined how call rate (reflecting intensity) and age affect the anti-predator behaviors of responders. Both juveniles and adults significantly altered their behavior upon hearing playbacks of seet calls; they foraged less and increased vigilance and other anti-predator behaviors. Adult robins were also able to distinguish between low intensity and high intensity calls; skygazing, an important behaviour that allows robins to scan for raptors, increased with call rate. Juveniles, on the other hand, skygazed less and there was a trend for juveniles to spend more time alert than adults suggesting that some learning may be involved.

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