Territory size and distribution of newly-emerged Atlantic salmon (Salmo salar)

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 velo...

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Bibliographic Details
Published in:Hydrobiologia 1990-10, Vol.206 (2), p.125-131
Main Authors: Gustafson-Greenwood, K.I. (Maine Univ., Orono, ME (USA). Dept. of Zoology), Moring, J.R
Format: Article
Language:English
Subjects:
CARGA GANADERA
COURS D'EAU
CURSOS DE AGUA
Freshwater
MAINE
MORTALIDAD
MORTALITE
MORTALITY
RIVERS
SALMO SALAR
STOCKING DENSITY
TAUX DE CHARGE
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Summary: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. 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. (DBO)
ISSN:0018-8158
1573-5117
DOI:10.1007/BF00018638