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Bibliography of the Maurice Lamontagne Institute

J.A. ROBITAILLE

BELZILE, L., J.A. ROBITAILLE, G. SHOONER, 1990. Synthèse des connaissances relatives à la biologie post-fraye du saumon atlantique (Salmo salar) en Ungava. Rapp. tech. can. sci. halieut. aquat., 1738, 29 p .

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In each of the rivers of Ungava where Atlantic salmon populations exist, kelts and reconditioned salmons are found in proportions that vary annually. In the kiksoak River, the salmon population has been intensively studied during recent years. During the period between descending as smolts and attaining sexual maturity, salmon can complete their growth in the estuary, in the ocean, or partially in both places. For fish that have adopted each of these growth types, a capacity for reconditioning in fresh water, near the spawning grounds, has been observed. This seems to constitute an adaptation to the severe climatic and hydrological conditions of Ungava. Salmon completing their growth in the estuary can also recuperate from spawning by descending to the estuary to feed for a few weeks then ascending to reproduce again, all within only one year. A conservative interpretation of the frequency of spawning marks on the scales of fish sampled permits the deduction that survival is at least three times highe for fish reconditioned in the estuary than for those that return to sea. This report gathers under a few themes the information gleaned from scientific documentation on the characteristics of the kelts of Ungava and their reconditioning.