A Pheromone Hypothesis for Homeward Migration in Anadromous Salmonids
1977; Wiley; Volume: 28; Issue: 2/3 Linguagem: Inglês
10.2307/3543965
ISSN1600-0706
Autores Tópico(s)Aquatic Invertebrate Ecology and Behavior
Resumocommon for both the open sea navigation and the selection of the home river and area of origin within the river system. The seasonal migration schedules in the anadromous salmonids of the Salangen river system, North Norway are presented. The species are char Salmo alpinus L. (= Salvelinus alpinus (L.)), trout Salmo trutta L. and Atlantic salmon Salmo salar L. Based on their migration schedules, a pheromone hypothesis is proposed for the entire homeward navigation in anadromous salmonids. According to this hypothesis, homeward navigation is an inherited response to population-specific pheromone trails released from descending smolt. During the downstream migration in spring and summer the smolt descend almost continually into the sea. The pheromones are thought to be released from the skin mucus.
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