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The importance of freshwater feeding in mature Pacific salmon: a reply to the comment by Armstrong on “Egg consumption in mature Pacific salmon (Oncorhynchus spp.)”

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Armstrong has questioned the biological relevance of the feeding observations that we presented in the study “Egg consumption in mature Pacific salmon (Oncorhynchusspp.)” (Can. J. Fish. Aquat. Sci. 66(9): 1546–1553). Here we discuss his arguments and show that feeding can provide substantial energetic gains, which would, for example, allow feeding salmon to maintain body condition for up to an additional 23days. Many consequences of feeding by mature Pacific salmon remain to be explored, but our study shows that these fish do feed in fresh water and that the benefits can be substantial.

Armstrong a remis en question la pertinence biologique des observations d'alimentation que nous avons présentées dans «Egg consumption in mature Pacific salmon (Oncorhynchusspp.)» (J.Can. Sci. Haleut. Aquat. 66(9): 1546–1553). Nous examinons ses arguments et démontrons que l'alimentation peut fournir des apports énergétiques substantiels, qui pourraient, par exemple, permettre aux saumons qui s'alimentent de maintenir leur condition corporelle jusqu'à 23 jours supplémentaires. Il reste de nombreuses conséquences de l'alimentation par les saumons du Pacifiques matures à explorer, mais notre étude montre que ces poissons s'alimentent de fait en eau douce et que les bénéfices peuvent être importants.

Document Type: Discussion

Publication date: 2010-12-01

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  • 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.
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