appleby - Ethology 094\ 770*781 "0888# 0888 Blackwell...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Ethology 094\ 770*781 "0888# Þ 0888 Blackwell Wissenschafts!Verlag\ Berlin ISSN 9068Ð0502 Centre for Food and Animal Research \ A`riculture and A`ri!Food Canada \ Ottawa Vocal Communication in Pigs] Who are Nursing Piglets Screaming at< Michael C[ Appleby\ Daniel M[ Weary\ Allison A[ Taylor + Gudrun Illmann Appleby\ M[ C[\ Weary\ D[ M[\ Taylor\ A[ A[ + Illmann\ G[ 0888] Vocal communication in pigs] Who are nursing piglets screaming at< Ethology 094\ 770*781[ Abstract Vocalizations during competition among nursing piglets were studied to inves! tigate their possible e}ects\ functions and implications for welfare[ In Expt 0\ two experimental piglets in each of 03 litters were temporarily deprived of milk by covering their preferred teats on the sow|s udder[ These piglets spent more time away from their teats than two control piglets\ and vocalized frequently in the 1 min before milk ejection[ Frequency of vocalization showed no consistent change over time within nursings^ nor did it change in successive nursings despite the fact that hunger presumably increased[ In Expt 1\ tape recordings of intense vocalizations "screams# produced by piglets competing at the udder were played to 11 litters while they were nursing^ each litter was played its own recording\ a recording from another litter and silence as a control[ Of 40 nursings analysed\ 03 were terminated without milk ejection\ all during playbacks[ When the sow did nurse successfully during a playback\ nursing was shorter "027 s# than during the silent controls "068 s#[ Both these responses by the sow might be expected to advance the next nursing[ Piglets rarely showed any apparent response to screaming either from their littermates or from the loudspeaker[ These results suggest that the calls function mainly as a signal to the sow that some piglets are being excluded from the current nursing episode[ Corresponding author] M[ Appleby\ Institute of Ecology and Resource Ma! nagement\ University of Edinburgh\ West Mains Road\ Edinburgh EH8 2JG\ UK[ E!mail] mappleby Ý srv9[bio[ed[ac[uk Introduction Vocalization and other modes of auditory communication are frequent com! ponents of animal con~ict "Huntingford + Turner 0876^ Hauser 0885#[ Sounds made by animals may elicit the approach of competitors or potential competitors "Brzoska 0871# or prevent such approach "Marcellini 0867#[ They may allow competitors to assess each other and to avoid further con~ict "Clutton!Brock + U[ S[ Copyright Clearance Center Code Statement] 9068!0502:88:09409Ð9770,03[99:9
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
771 M[ C[ Appleby et al[ Albon 0868# or they may be important in escalated _ghting Ð either by inhibiting competitors "Schwartz 0863# or by recruiting assistance from a third party "Gou! zoules et al[ 0873#[ These functions often overlap] for example\ where vocalizations
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/17/2011 for the course PSC PSC 113 taught by Professor Schank during the Spring '08 term at UC Davis.

Page1 / 12

appleby - Ethology 094\ 770*781 "0888# 0888 Blackwell...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online