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On Predicting the Yield from Brook Trout Populations
Author(s) -
Béland Pierre
Publication year - 1974
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(1974)103<353:optyfb>2.0.co;2
Subject(s) - yield (engineering) , extinction (optical mineralogy) , population , trout , demography , ecology , geography , biology , mathematics , statistics , fishery , fish <actinopterygii> , physics , sociology , paleontology , thermodynamics
Corrections are made to an earlier paper by Jensen (1971). The predicted yield from an unstable population is compared to that from a stable population. It is shown that an unstable population will reach a stable structure, following which the yield will not fluctuate but go steadily down. Data from the population indicate that it is on its way towards extinction, even without additional mortality imposed on any age group.