BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Colony defense by post-reproductive adults and young nymphs in a s
 ocial aphid - Keigo Uematsu. Department of General Systems Studies\, Unive
 rsity of Tokyo.
DTSTART:20110930T120000Z
DTEND:20110930T130000Z
UID:TALK33250@talks.cam.ac.uk
CONTACT:Dr. Belinda Gallardo
DESCRIPTION:Eusociality involves a reproductive division of labor among th
 e members of a society. In social insects\, much attention has been paid t
 o life-long sterile castes. However\, altruistic behavior of post-reproduc
 tive sterile individuals has not been well documented\, although recently 
 been suggested in humans and whales. Here I show the post-reproductive alt
 ruism in a social aphid. The aphid Quadrartus yoshinomiyai forms galls on 
 its host plant. Wingless adults of this species experience a long post-rep
 roductive life span. These\npost-reproductive adults self-sacrificingly de
 fend the colony by sticking themselves to intruding predators with waxy se
 cretion. In addition\, first-instar nymphs also perform altruistic colony 
 defense. I will discuss the ecological factors and life-history traits fav
 oring\nsuch a novel social system.
LOCATION:Part II Lecture Theatre\, Department of Zoology \, Downing Street
 \, CB2 3EJ
END:VEVENT
END:VCALENDAR