Life Span of Rio Grande Cutthroat Trout
Mature Rio Grande Cutthroat Trout live between six and eight years, about average for their species (Spaete, 2006). They are stream spawners, and their average age of sexual maturity is between five and seven years of age, with breeding occurring only once or twice during the lifespan (Spaete, 2006). In general, breeding season is between spring and early summer, with offspring in the 1000 to 2000 range (Spaete, 2006). Environmental factors including temperature and food availability will impact the breeding cycle as well as overall size of the individuals.
Habitat Management for Rio Grande Cutthroat Trout
The Rio Grande Cutthroat Trout is a subspecies of the cutthroat living primarily in the rivers of Colorado and New Mexico. In addition to the Rio Grande itself, the Pecos River and the Canadian River are its native habitats. The Rio Grande Cutthroat Trout thrives when it has access to a diverse geographic zone, because it needs different types of habitat for spawning, for rearing of the spawn, for general adult livelihood, and also for temporary refuge ("Rio Grande Cutthroat Trout Conservation Strategy," 2013).
In general, the species requires "clear, cold, highly oxygenated water," as well as "clean gravel substrates, a network of pools and runs, and an abundance of food," (United States Fish and Wildlife Service, 2014, p. 3). For spawning, the Rio Grande Cutthroat Trout requires clean gravel river bottoms with little to no fine sediment. The trout seek slightly higher water temperatures and lower water velocity...
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