![]() Gills are filled with blood vessels which exchange oxygen and carbon dioxide as water passes over them. They can survive in warmer temperatures but do not thrive. Trout are most successful in water temperatures ranging from 0-20 degrees C. HIGHEST POTENTIAL JUMP: Rainbow trout can jump up to 5 times their body length.ĪDULT LENGTH: Cutthroat trout 8-24”, brook trout 5-18”, lake trout 16-40”īODY TEMPERATURE: Trout are cold-blooded their body temperature is the same as the environment. Males are often more brightly colored than females. Cutthroat trout turn deep orange and red on the belly, while brown and brook trout develop colorful spotting patterns along their sides. Spawning fish are typically more brightly colored. SEX RATIO: Typically 1:1 but can vary greatly.ĬOLORATION: Fish can change colors (darken or lighten) to blend in with the environment. ![]() OLDEST DOCUMENTED LAKE TROUT: 62 years (Canada)ĬAUSES OF MORTALITY: predation, disease, environmental factors OLDEST DOCUMENTED FISH IN YNP: Cutthroat trout: 16 years. SPECIES: Oncorhynchus clarki, Oncorhynchus mykiss, Salmo trutta, Salvelinus fontinalis,ĬOMMON NAMES: Cutthroat (native), rainbow, brown, brook, lake, charĬUTTHROAT TROUT: Named for the red slash along their jawĪVERAGE LIFE SPAN : Cutthroat/rainbow/brown/ brook trout: 6-12 years ![]()
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