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Date: Wed, 19 Mar 2003 03:54:53 EST<br>
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Subject: Bioacoustics papers in Behav Ecol Sociobiol<br>
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Bioacoustics papers in <i>Behavioral Ecology and Sociobiology<br>
<br>
</i>Volume <b>53</b> Number 4 (March 2003)<br>
<br>
* <font color="ffff,0000,0000">Michael J. Smith and J. Dale Roberts <br>
Call structure may affect male mating success in the quacking frog<br>
<i>Crinia georgiana</i> (Anura: Myobatrachidae) <br>
Behav Ecol Sociobiol (2003) 53: 221-22. <br>
<br>
</font><b>Abstract</b> We investigated the relationship between mating
success,<br>
male size and variation in the advertisement call in the frog Crinia<br>
georgiana under field conditions. Mating success in 91 males was<br>
determined by following 32 females as they moved through the<br>
chorus. Our analyses indicated that successful males had a higher<br>
number of pulses in the first note and/or called at a higher rate.<br>
However, we did not detect a significant relationship between mating<br>
success and dominant frequency, the property that varied most<br>
strongly with body size, suggesting that size is not an important<br>
influence on mate choice in this species. Even so, smaller males were<br>
more successful if they called at a higher rate whereas larger males<br>
were more successful if they had more pulses in their first note.<br>
Accordingly, males of different size may use different calling tactics to<br>
attract females. These results provide a framework for further<br>
experimental studies aimed at investigating the independent impacts of<br>
both inter- and intra-sexual selection on the advertisement call and<br>
body size of C. georgiana.<br>
<br>
_________<br>
<br>
* <font color="ffff,0000,0000">Susanne Shultz, Charlotte Faurie and Ronald Noë
<br>
Behavioural responses of Diana monkeys to male long-distance calls:<br>
changes in ranging, association patterns and activity <br>
Behav Ecol Sociobiol (2003) 53: 238-245.<br>
<br>
</font><b>Abstract</b> Although much is known about the relationship
between<br>
vigilance, group size and predation risk, behavioural responses to<br>
predation risk and their resultant costs are less clear. We investigated<br>
the response of Diana monkeys to increased predation risk by looking<br>
at behavioural changes associated with male long-distance calls,<br>
which are reliably given to certain predators. After male long-distance<br>
calls, group spread and nearest-neighbour distance decreased whilst<br>
travel and association rates for the group increased. The average<br>
height and exposure level of individuals in the group did not change<br>
after calls. Individual Diana monkeys changed their behaviour and<br>
were more likely to be vigilant or travel and less likely to engage in<br>
social or resting behaviours after long-distance calls. In addition,<br>
movement rates increased with the number of species the Diana<br>
monkeys were associated with. Diana monkey long-distance calls<br>
facilitate the joining of groups of other species. Black and white<br>
colobus and lesser spot-nosed monkeys were more likely to be in an<br>
association following a long-distance call than before. Behavioural<br>
responses, such as increased travel or association rates, that reduce<br>
foraging efficiency are interpreted as evidence of a non-lethal impact<br>
of increased predation risk.<br>
<br>
<br>
<br>
__________________________________________________________________________<br>
Jérôme SUEUR<br>
Ecole Pratique des Hautes Etudes, Biologie et Evolution des Insectes<br>
Muséum national d'Histoire naturelle, 45 rue Buffon, 75005 Paris - France<br>
Ph. 00 33 1 40 79 31 57 / Fx. 00 33 1 40 79 36 99 / Ml. [EMAIL PROTECTED]<br>
__________________________________________________________________________<br>
<br>
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