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Incubation Discharge and Aspects of Brown Trout Population Dynamics
Author(s) -
Spina Anthony P.
Publication year - 2001
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(2001)130<0322:idaaob>2.0.co;2
Subject(s) - salmo , brown trout , incubation , trout , population , biology , population density , incubation period , ecology , fishery , zoology , demography , fish <actinopterygii> , biochemistry , sociology
Data from an 11‐year study of a population of brown trout Salmo trutta showed that peak discharge at the time of incubation was inversely related to year‐class strength (density of young of the year estimated in fall), which suggests that scouring of nests is a source of temporal variation in the density of young of the year. Relationships between cohort (individuals spawned the same year) age‐groups provide a clue that discharge‐related year‐class strength might influence the population dynamics of a year‐class over time.