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Freshwater fishes [Diversity] [Biogeography] [Hydrographic units] [Water masses] [Depth] [Sediments] [Wetlands] [Local richness] [Rarity] [Conservation status] [Diversity and conservation] |
Saltwater fishes [Diversity] [Biogeography] [Salinity gradient] [Aquatic physiographic units] [Distance from the shore] [Depth] [Sediments] [Local richness] [Rarity] [Conservation status] [Diversity and conservation] |
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| Freshwater fishes of the St. Lawrence: rarity |
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The analysis of the rarity of freshwater fishes shows five groups (with a 90% probability ellipse for the species in each group). A group of 30 abundant species can be separated from two other groups of common species (19 and 13 species) based on the number of fishing gear types used. In turn, these three abundant and common groups can be distinguished from two other groups characterized as rare (22 species) and extremely rare (18 species), based on the ranking of the best gear. Abundant species include yellow perch, suckers, northern pike, brown bullhead, channel catfish, walleyes, pumpkinseed, and lake sturgeon. Common species include the Atlantic sturgeon, lake whitefish, threespine stickleback, and several minnows. Rare species include the copper redhorse, redfin pickerel, freshwater drum and introduced species of Pacific salmon. Lastly, the yellow bullhead, slimy sculpin, striped bass and arctic char are extremely rare. Readers should note that this classification was carried out based on surveys done over decades and does not represent the current situation exactly.
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