ORIGINAL ARTICLE: Life-history traits and energetic status in relation to vulnerability to angling in an experimentally selected teleost fish
Autor: | Steven J. Cooke, Robert Arlinghaus, Tara Redpath, David P. Philipp, David H. Wahl |
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Rok vydání: | 2009 |
Předmět: |
0106 biological sciences
education.field_of_study Truncation selection Ecology 010604 marine biology & hydrobiology Fishing Population Micropterus 04 agricultural and veterinary sciences Biology biology.organism_classification 01 natural sciences Life history theory Gonadosomatic Index 040102 fisheries Genetics 0401 agriculture forestry and fisheries 14. Life underwater Fisheries management General Agricultural and Biological Sciences education Population dynamics of fisheries Ecology Evolution Behavior and Systematics |
Zdroj: | Evolutionary Applications. 2:312-323 |
ISSN: | 1752-4571 |
Popis: | In recreational fisheries, a correlation has been established between fishing-induced selection pressures and the metabolic traits of individual fish. This study used a population of largemouth bass (Micropterus salmoides) with lines of low vulnerability fish (LVF) and high vulnerability fish (HVF) that were previously established through artificial truncation selection experiments. The main objective was to evaluate if differential vulnerability to angling was correlated with growth, energetics and nutritional condition during the sub-adult stage. Absolute growth rate was found to be between 9% and 17% higher for LVF compared with HVF over a 6-month period in three experimental ponds. The gonadosomatic index in females was lower for LVF compared with HVF in one experimental pond. No significant differences in energy stores (measured using body constituent analysis) were observed between LVF and HVF. In addition, both groups were consuming the same prey items as evidenced by stomach content analysis. The inherent reasons behind differential vulnerability to angling are complex, and selection for these opposing phenotypes appears to select for differing growth rates, although the driving factors remain unclear. These traits are important from a life-history perspective, and alterations to their frequency as a result of fishing-induced selection could alter fish population structure. These findings further emphasize the need to incorporate evolutionary principles into fisheries management activities. |
Databáze: | OpenAIRE |
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