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Territory size and distribution of newly-emerged Atlantic salmon (Salmo salar)
Authors:Karla I Gustafson-Greenwood  John R Moring
Institution:(1) U.S. Fish and Wildlife Service, Maine Cooperative Fish and Wildlife Research Unite, Department of Zoology, University of Maine, 04469 Orono, Maine, USA;(2) Present address: 1225 Marvin Avenue, 29407 Charleston, South Carolina, USA
Abstract:Newly emerged Atlantic salmon (Salmo salar) were observed from May to August 1981 at six isolated redds in Washington County, Maine, USA. Territorial size and distribution were measured. At the end of the emergence period (12 to 28 May), fish maintained positions (stations) at redds where water velocity did not exceed 52 cm s–1 By 12 June, most salmon (80–96%) had moved off the redds of origin and had established territories 1 to 5 m from the redd. The area defended increased substantially after mid-June, but territorial aggression diminished by 15 July, and the fry dispersed downstream. All fish observed were territorial, and the percentage of time during which stations were held decreased from 89 in mid-May to as low as 40% in mid-June.Cooperators are the Maine Department of Inland Fisheries and Wildlife, University of Maine, U.S. Fish and Wildlife Service, and the Wildlife Management Institute
Keywords:Atlantic salmon  New England  territory  juveniles  streams  habitat use
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