Abstract
Lack of suitable conditions for natural spawning is a limiting factor in brook trout production in waters in the Adirondack Mountains, New York. Presence of ground water or springs is considered a major requirement for successful spawning in this species. Two kinds of improved spawning areas have been offered: (1) replacement of unsuitable bottom material with gravel on or near known natural spawning areas; (2) piping and dispersing water through a gravel-filled box. Both types of improvements have been used by brook trout under some conditions. Further studies are required to determine factors responsible for acceptance or rejection of improved areas and to evaluate efficiency in the production of fry.
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