Deakin University
Browse

File(s) not publicly available

Individual variation in foraging movements in a lake population of young-of-the-year brook charr (Salvelinus fontinalis)

journal contribution
posted on 1995-01-01, 00:00 authored by Peter BiroPeter Biro, M Ridgway
We examined the variation in foraging movements in a population of young-of-the-year (YOY) brook charr living in the near-shore littoral zone of a lake. By repeating the methodology of an earlier stream study, we made direct comparisons between data from lake and stream populations. In general, the pattern of variation in foraging movements was similar between the two sites with greater variability and activity observed in the lake population. The dichotomous nature of the proportion of time spent moving in the stream was also observed in the lake population but in a reversal of the stream pattern. Charr that moved constantly while foraging represented the largest movement category in the lake. In general, variation in foraging movements were more strongly related to the rate of prey rejection, whereas environmental factors, such as distance from shore, submerged objects, and the amount of overhead riparian cover, were more strongly related to prey ingestion. This last finding directly contrasts with that found in the stream literature for YOY charr in still water where ingestion rate, as estimated using feeding attempt rate, increases with the mobility of YOY charr.

History

Journal

Behaviour

Volume

132

Issue

1

Pagination

57 - 74

Publisher

Brill

Location

Leiden, The Netherlands

ISSN

0005-7959

eISSN

1568-539X

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal