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Individual‐level analysis of pre‐ and post first‐feed growth and development in Atlantic salmon

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Abstract:

Atlantic salmon Salmo salar were followed from egg to smoltification using genetic analysis to identify individuals and to link observations from pre‐ and post first feeding. Egg size and hatch timing significantly influenced alevin size at first feed but neither egg size, hatch timing or alevin sizes were correlated to size, condition factor or smolt status post first feed. In a hatchery environment the potential advantage gained by early hatching, larger alevin does not persist after first feeding. Different physiological and genetic complexes appear to influence growth in these two distinct phases of the Atlantic salmon's life‐cycle.

Keywords: Atlantic salmon; egg size; endogenous growth; exogenous growth; hatch timing

Document Type: Regular Paper

DOI: http://dx.doi.org/10.1111/j.0022-1112.2005.00831.x

Affiliations: 1: Fisheries Research Services, Marine Laboratory, Victoria Road, Aberdeen, AB11 9DB, Scotland, U.K. and 2: University of Aberdeen, School of Biological Science, Department of Zoology, Tillydrone Avenue, Aberdeen, AB24 2TZ, Scotland, U.K.

Publication date: October 1, 2005

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