SENSORY MECHANISMS OF HOMING IN SALMONID FISH I. INTRODUCTORY EXPERIMENTS ON THE OLFACTORY SENSE IN GRILSE OF BALTIC SALMON (SALMO SALAR) by GUNNAR BERTMAR and ROLF TOFT 1) (Department of, Biology, Section of Ecological Zoology, University of UmeÅ, UmeÅ, Sweden) (With 2 Figures) (Rec. 4-VI-1969) INTRODUCTION The homing of salmons have been studied for some time and from . Migrating or displaced Pacific and Atlantic salmons generally return to the home river (GERKING, 1959). Tagging experiments with Baltic Salmon of River Indalsalven and other Baltic rivers have shown the same (PETERSON, 1957-60). The sensory basis for homing in fishes is of great theoretical, practical and economic interest and some accounts have been published in this field BRETT et al., 1963; HASLER, 1966; KLEEREKOPER, 1967; GROOT, 1965). No observations have, however, been reported on the sen- sory mechanisms of homing in the Baltic salmon or any other Scandinavian salmonids. A project for ecological, ethological and structural investigations on the mechanisms initiating and guiding the homing behaviour in these fishes has therefore been ?started by BERTMAR, It represents a continuation and widening of his studies on the snout in fishes and tetrapods (BERTMAR, 1969). 1) We thank Prof. A. LINDROTH
Behaviour – Brill
Published: Jan 1, 1969
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