An atypical brook charr (Salvelinus fontinalis) spawning area |
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Authors: | James M Fraser |
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Institution: | (1) Research Section, Fisheries Branch, Ontario Ministry of Natural Resources, Box 50, Maple, Ontario, L0J 1EO, Canada |
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Abstract: | Synopsis Brook charr (Salvelinus fontinalis) spawned successfully on a 0.3 m thick aggregation of waterlogged sticks, woodchips and debris overlying the soft ooze bottom of a small Precambrian Shield lake. Brook charr were apparently attracted to groundwater seeping up through the aggregation and utilized the tangle of various sized sticks as a spawning substrate. Eggs were deposited in late October and alevins emerged from the area in late March, periods that coincide with the conventional spawning of native brook charr on gravel areas in nearby lakes. Our observations support the contention that upwellin, water is more important than bottom type in stimulating brook charr to select a spawning site. |
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Keywords: | Salmonids Seepage Substrate Emergence Precambrian Shield lake |
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