The effect of hunger and cestode parasitism on the shoaling decisions of small freshwater fish

I. Barber*, F. A. Huntingford, W. T. Crompton

*Awdur cyfatebol y gwaith hwn

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid


Individual minnowsPhoxinus phoxinusand three-spined sticklebacksGasterosteus aculeatuswere provided with a mutually exclusive choice between joining a shoal of conspecifics and foraging alone in a maze. The shoaling decisions and foraging behaviour of individual fish were studied when the fish were satiated and after 24- and 48-h periods of food deprivation. Hunger level was found to have a significant effect on shoaling behaviour. When satiated, fish of both species spent a greater proportion of time within one body length of the shoal and spent less time out of visual contact with the shoal than after periods of food deprivation. The effect of the cestode parasiteSchistocephalus soliduson the shoaling behaviour of stickleback hosts was complex. When satiated, infected fish spent less time than uninfected fish within one body length of the shoal, preferring to remain outside the shoal, yet within visual contact, although when food deprived there was no difference in the proportion of time spent by infected and uninfected fish close to the shoal. The possible ecological significance of this change in behaviour is discussed with reference to the manipulation hypothesis of host-parasite interactions.

Iaith wreiddiolSaesneg
Tudalennau (o-i)524-536
Nifer y tudalennau13
CyfnodolynJournal of Fish Biology
Rhif cyhoeddi3
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - Medi 1995

Ôl bys

Gweld gwybodaeth am bynciau ymchwil 'The effect of hunger and cestode parasitism on the shoaling decisions of small freshwater fish'. Gyda’i gilydd, maen nhw’n ffurfio ôl bys unigryw.

Dyfynnu hyn