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Movement of northern pike from the Grand River in Kitchener, Ontario, Canada to spawning areas in tributary creeks is directly related to reproductive success and production. Limited populations

Smolts require access to the fishway (i.e., the fishway must be open and operational) during their downstream migration. In our professional opinion, the Maple Hill Dam fishway, Saugeen River, Ontario, should remain open to allow downstream passage of smolts in July/August, particularly as water temperature decreases in the autumn. It is beneficial to close the fishway to prevent accumulation of debris very early in the spring; however, the fishway should be opened as soon as possible each year, and remain open for as long as possible (i.e., until December)

Attraction and passage efficiency was reviewed and compared from 19 monitoring studies that produced data for evaluations of pool-and-weir, Denil, vertical-slot and nature-like fishways. Data from 26 species of anadromous and potamodromous fishes from 6 countries were separated by year and taxonomic family into a matrix with 101 records.