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CATEGORIES:Ecology Lunchtime Series
SUMMARY:Parasite-induced swarming behaviour in Artemia spp
 . - Nicolas Rode\, Center for Evolutionary and Fun
 ctional Ecology\, Montpellier\, France
DTSTART;TZID=Europe/London:20121004T130000
DTEND;TZID=Europe/London:20121004T140000
UID:TALK39654AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/39654
DESCRIPTION:Grouping behaviours (e.g. schooling\, shoaling and
  swarming) are commonly explicated through adaptiv
 e hypotheses such as protection against predation\
 , access to mates or improved foraging. However\, 
 the hypothesis that aggregation can result from ma
 nipulation by parasites to increase their transmis
 sion has never been demonstrated. We tested this h
 ypothesis using natural populations of two crustac
 ean hosts (_Artemia franciscana_ and _Artemia part
 henogenetica_) infected with one cestode and two m
 icrosporidian parasites. We found that the cestode
  parasite modified both the swarming behaviour and
  the red colour of its host\, which likely results
  in increased parasite transmission to its final a
 vian host. Furthermore\, we found that the microsp
 oridian parasites modified both the swarming and t
 he surfacing behaviours of its host. We demonstrat
 ed with experimental infections in the laboratory\
 , that these concurrent manipulations result in in
 creased spore transmission to new hosts. Hence\, t
 his study suggests that parasites might play a pro
 minent role in host grouping behaviours.
LOCATION:Part II Lecture Theatre\, Department of Zoology\, 
 Downing Street\, Cambridge CB2 3EJ
CONTACT:Jessica C. Walsh
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