Skip to main content

Competition among juvenile Atlantic salmon (Salmo salar) and steelhead (Oncorhynchus mykiss): relevance to invasion potential in British Columbia

Buy Article:

$50.00 plus tax (Refund Policy)

Abstract:

Atlantic salmon (Salmo salar) are routinely captured in both freshwater and marine environments of coastal British Columbia (Canada). Recent evidence suggests that this species is now naturally reproducing in Vancouver Island rivers. Our objective was to quantify the performance of each species in intra- and inter-specific competition by assessing the competitive ability of Atlantic salmon sympatric with native niche equivalent steelhead – rainbow trout (Oncorhynchus mykiss). Significant behavioural differences, particularly with respect to agonism, were observed between species; however, the status of an individual as resident or challenger was the best predictor of performance. Resident fish always outperformed challengers, regardless of species. Thus, we suggest that Atlantic salmon may be capable of colonizing and persisting in coastal British Columbia river systems that are underutilized by native species, such as the steelhead.

On capture couramment des saumons atlantiques (Salmo salar) dans des milieux marins ou dulcicoles du littoral de la Colombie-Britannique (Canada). Des données récentes permettent de penser que cette espèce se reproduit maintenant de façon naturelle dans les cours d'eau de l'île de Vancouver. Notre objectif était de quantifier la performance de chaque espèce dans la concurrence intra- et interspécifique en évaluant l'aptitude concurrentielle des saumons atlantiques sympatriques du saumon arc-en-ciel (Oncorhynchus mykiss) indigène, dont la niche est équivalente. Des différences de comportement significatives ont été notées, particulièrement sur le plan de l'agonisme, mais c'est le statut d'un individude résident ou de challengeur qui constituait le meilleur prédicteur de la performance. Les poisson résidents dépassaient toujours les challengeurs, quelle que soit l'espèce. Nous jugeons donc que le saumon atlantique est en mesure de coloniser et d'occuper de façon permanente les systèmes côtiers de Colombie-Britannique sous-utilisés par les espèces indigènes comme le saumon arc-en-ciel.[Traduit par la Rédaction]

Document Type: Research Article

Publication date: 2001-01-01

More about this publication?
  • Published continuously since 1901 (under various titles), this monthly journal is the primary publishing vehicle for the multidisciplinary field of aquatic sciences. It publishes perspectives (syntheses, critiques, and re-evaluations), discussions (comments and replies), articles, and rapid communications, relating to current research on cells, organisms, populations, ecosystems, or processes that affect aquatic systems. The journal seeks to amplify, modify, question, or redirect accumulated knowledge in the field of fisheries and aquatic science. Occasional supplements are dedicated to single topics or to proceedings of international symposia.
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Terms & Conditions
  • Sample Issue
  • Reprints & Permissions
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more