Production studies on the young stages of Atlantic salmon (Salmo salar L.) in an experimental area of Indian River, Notre Dame Bay, Newfoundland

Sturge, Cecil Calvin (1968) Production studies on the young stages of Atlantic salmon (Salmo salar L.) in an experimental area of Indian River, Notre Dame Bay, Newfoundland. Masters thesis, Memorial University of Newfoundland.

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Abstract

A preliminary assessment was made of the effect of a controlled flow spawning channel on Atlantic salmon parr production in Indian River, Newfoundland. -- Fry production, in the channel, was compared with that in the river, under natural conditions, and found to be substantially higher. Post-hatching migration of fry was restricted to within two miles of the channel. Underyearling density is higher in the area of direct channel influence than in any part of the river where fry are provided solely on the basis of natural production. Underyearling to yearling survival in the area of direct channel influence was 9.7 percent, compared with 85.9 to nearly 100 percent in other areas. Parr density in the same area was 13 per unit compared with 19 per unit for the river as a whole. Parr densities ranged from 8.0 to 35.6 per unit. Parr production was correlated with predominant bottom type. Highest densities occurred in areas where large stones and boulders predominated. -- Evidence is presented to show that the controlled flow spawning channel at Indian River can be best used for salmon management, if fry produced there are distributed to areas of the river which offer an abundance of good parr rearing area.

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