Growth-enhanced salmon modify stream ecosystem functioning.

Autor: Cucherousset J; Laboratoire Évolution and Diversité Biologique (EDB UMR 5174), Université de Toulouse, CNRS, ENFA, UPS, Toulouse, France., Sundt-Hansen LE; Norwegian Institute for Nature Research, Trondheim, Norway., Buoro M; Laboratoire Évolution and Diversité Biologique (EDB UMR 5174), Université de Toulouse, CNRS, ENFA, UPS, Toulouse, France.; ECOBIOP, Université de Pau et des Pays de l'Adour, E2S UPPA, INRAE, Saint-Pée-sur-Nivelle, France., Závorka L; Laboratoire Évolution and Diversité Biologique (EDB UMR 5174), Université de Toulouse, CNRS, ENFA, UPS, Toulouse, France., Lassus R; Laboratoire Évolution and Diversité Biologique (EDB UMR 5174), Université de Toulouse, CNRS, ENFA, UPS, Toulouse, France., Baekkelie KAE; Norwegian Institute for Nature Research, Trondheim, Norway., Fleming IA; Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada., Björnsson BT; Department of Biological & Environmental Sciences, University of Gothenburg, Gothenburg, Sweden., Johnsson JI; Department of Biological & Environmental Sciences, University of Gothenburg, Gothenburg, Sweden., Hindar K; Norwegian Institute for Nature Research, Trondheim, Norway.
Jazyk: angličtina
Zdroj: Journal of fish biology [J Fish Biol] 2021 Dec; Vol. 99 (6), pp. 1978-1989. Date of Electronic Publication: 2021 Oct 19.
DOI: 10.1111/jfb.14904
Abstrakt: Use of fast-growing domesticated and/or genetically modified strains of fish is becoming increasingly common in aquaculture, increasing the likelihood of deliberate or accidental introductions into the wild. To date, their ecological impacts on ecosystems remain to be quantified. Here, using a controlled phenotype manipulation by implanting growth hormone in juvenile Atlantic salmon (Salmo salar), we found that growth-enhanced fish display changes in several phenotypic traits known to be important for ecosystem functioning, such as habitat use, morphology and excretion rate. Furthermore, these phenotypic changes were associated with significant impacts on the invertebrate community and key stream ecosystem functions such as primary production and leaf-litter decomposition. These findings provide novel evidence that introductions of growth-enhanced fish into the wild can affect the functioning of natural ecosystems and represent a form of intraspecific invasion. Consequently, environmental impact assessments of growth-enhanced organisms need to explicitly consider ecosystem-level effects.
(© 2021 Fisheries Society of the British Isles.)
Databáze: MEDLINE
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