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Territorial and foraging behaviour of juvenile salmonids in
Icelandic streams   Territoriality and foraging behaviour can
play a major role in determining the abundance and distribution
of mobile animals. To date, territorial behaviour of young-of-
the-year (YOY) salmonids is typically described for sit-and-wait
individuals that defend territories from a single foraging
station, but ignored for individuals that are more mobile or use
several foraging stations. In this study, I describe the
territorial and foraging behaviour of 61 YOY Arctic charr (31)
and brown trout (30), in relation to key ecological factors in
six rivers (three rivers per species) in NW-Iceland. Individual
territory size was estimated, irrespective of mobility, based on
locations of all observed foraging and aggressive acts over 40
minutes. Territories were generally larger for Arctic charr than
for brown trout, which co