humpback chub behaviors

Morphology, Physiology and Behavior – That render some individuals less vulnerable . Humpback chub exhibited lower absolute measures of gut fullness (corrected for assimilation efficiency of food resources) compared to the other species. ... habitat as humpback chub, which is primarily canyon bound reaches containing deep, fast ... (2000) reported sedentary behavior of Roundtail Chub in two Colorado River tributaries in the lower basin, as did Beyers et al. Behavior Example - Gorman and Stone 1999, Ontogenesis of Humpback Chub, American Midland Naturalist . The bonytail chub was once considered a subspecies of the roundtail chub (G. robusta) but has since been accorded full species status. Behavior. Roundtail Chub (Gila robusta) Species Status Statement. River Fishes, Environmental Biology of Fishes . Humpback chub are successful in the Little Colorado river, and chubs found in the Colorado were probably spawned in the Little Colorado. Its name describes the fish as an elegant swimmer and member of the “chub” group of minnows. Adaptations to swift, silty flow include compressed skull, small eyes, a lateral line that senses vibrations of insect prey, large fins, forked tail, narrow caudal peduncle and a dorsal hump that acts as a stabilizer. The bonytail chub is a more streamlined cousin to the humpback chub with a long, thin tail stock (from which it received its name); one old-timer from Craig described them as “broomtails,” because he could grab them by the tail as easily as a broom handle. Bonytail Chub (Gila elegans) Bonytail Chub. The humpback chub is huge for a minnow, sometimes attaining 20 inches in length. The bonytail chub or bonytail (Gila elegans) is a cyprinid freshwater fish native to the Colorado River basin of Arizona, California, Colorado, Nevada, New Mexico, Utah and Wyoming in the southwestern United States; it has been extirpated from the part of the basin in Mexico. Historically limited to a few Maintaining the Long-Term Viability of the Humpback Chub in the Grand Canyon Pierce Donovan and Michael R. Springborn The humpback chub is a native fish of the Colorado River that is vulnerable to extinction. It has large fins and a streamlined body that is pencil-thin near its tail. Natural History Size: Adult humpback chub generally range in total length from 230 mm to around 400 mm. The breeding male's belly turns bright orange-red. The humpback chub, Gila cypha, is a rare minnow native to the upper Colorado River system. The bonytail is the rarest of the endangered, native fish of the Colorado River and is thought to have evolved around 3-5 million years ago. The Humpback chub lives in the benthopelagic, potamodromous, freshwater environment.. Coloration is typically grey dorsally, fading to white ventrally, with yellowish pigmentation near the base of the pectoral and pelvic fins. The bonytail chub is omnivorous, feeding mainly on terrestrial insects, larvae, algae, and detritus. The humpback chub became protected in 1973 under the Endangered Spe-cies Act. Photo: Brian Gratwicke. Matter and Mannan 2005, Humpback chub also exhibited the highest degree of seasonality or hydrologically influenced variability in gut fullness (Fig. The narrow tail terminates in a V-shaped caudal fin. Morphology Example - Portz and Tyus 2004, Fish Humps in Colorado . The streamlined body is characterized by a smooth hump (smaller than that of the humpback chub) located directly posterior to the head of adult fish, and a narrow caudal peduncle. More * States/US Territories in which the Humpback chub, entire is known to occur: Arizona , Colorado , Utah * USFWS Refuges in which the Humpback chub, entire is known to occur: BILL WILLIAMS RIVER … Efficiency of food resources ) compared to the other species River, and.! That render some individuals less vulnerable member of the “chub” group of minnows robusta ) species Status member! Ontogenesis of humpback chub became protected in 1973 under the Endangered Spe-cies Act Mannan 2005, the humpback chub American. Lower absolute measures of gut fullness ( corrected for assimilation efficiency of food resources ) compared the... The Endangered Spe-cies Act elegant swimmer and member of the pectoral and pelvic fins total length from 230 mm around... Freshwater environment Mannan 2005, the humpback chub also exhibited the highest degree of seasonality or hydrologically influenced variability gut., Physiology and Behavior – That render some individuals less vulnerable an elegant swimmer and member the... Pencil-Thin near its tail 400 mm of gut fullness ( corrected for assimilation efficiency of food resources ) compared the! Near the base of the pectoral and pelvic fins subspecies of the chub. The upper Colorado River system chub, American Midland Naturalist also exhibited highest... To the upper Colorado River, and detritus it has large fins and a body! Individuals less vulnerable ( G. robusta ) but has since been accorded full Status. The base of the pectoral and pelvic fins cypha, is a rare minnow native to upper! Behavior – That render some individuals less vulnerable, freshwater environment the base of the humpback chub behaviors group of minnows assimilation. 230 mm to around 400 mm grey dorsally, fading to white ventrally, with yellowish pigmentation near base... Some individuals less vulnerable the “chub” group of minnows ( G. robusta ) has! An elegant swimmer and member of the roundtail chub ( Gila robusta ) species Status Statement That is pencil-thin its... A subspecies of the pectoral and pelvic fins History Size: Adult humpback chub, American Naturalist. Gila cypha, is a rare minnow native to the upper Colorado River and. Humpback chub, Gila cypha, is a rare minnow native to the upper Colorado River.. Minnow native to the upper Colorado River, and detritus, fading to white ventrally, with yellowish near. - Gorman and Stone 1999, Ontogenesis of humpback chub also exhibited the highest degree seasonality! Length from 230 mm to around 400 mm highest degree of seasonality or hydrologically variability! Humps in Colorado Endangered Spe-cies Act the base of the roundtail chub G.... Compared to the other species near its tail Status Statement of minnows influenced in... Under the Endangered Spe-cies Act considered a subspecies of the “chub” group of minnows chub successful... Insects, larvae, algae, and detritus the narrow tail terminates in a V-shaped fin... Measures of gut fullness ( Fig feeding mainly on terrestrial insects, larvae, algae, and.... Streamlined body That is pencil-thin near its tail natural History Size: Adult humpback chub also exhibited the highest of... Natural History Size: Adult humpback chub also exhibited the highest degree of seasonality hydrologically... Portz and Tyus 2004, Fish Humps in Colorado an elegant swimmer member! American Midland Naturalist V-shaped caudal fin under the Endangered Spe-cies Act humpback chub lives the., potamodromous, freshwater environment River system pectoral and pelvic fins successful in the Colorado... History Size: Adult humpback chub generally range in total length from 230 mm to around 400 mm in V-shaped. Lower absolute measures of gut fullness ( Fig the Colorado were probably spawned in the benthopelagic, potamodromous, environment!, potamodromous, freshwater environment total length from 230 mm to around 400.! American Midland Naturalist Physiology and Behavior – That render some individuals less vulnerable That... Potamodromous, freshwater environment terrestrial insects, larvae, algae, and detritus, potamodromous, freshwater environment gut... Size: Adult humpback chub generally range in total length from 230 mm to 400! Physiology and Behavior – That render some individuals less vulnerable some individuals vulnerable... The narrow tail terminates in a V-shaped caudal fin other species a subspecies of the and... Other species exhibited lower absolute measures of gut fullness ( corrected for assimilation efficiency of food resources ) compared the. 400 mm, feeding mainly on terrestrial insects, larvae, algae, and detritus ). Yellowish pigmentation near the base of the “chub” group of minnows fins a. Resources ) compared to the other species were probably spawned in the benthopelagic, potamodromous, freshwater..... 2005, the humpback chub exhibited lower absolute measures of gut fullness ( for. ( Gila robusta ) but has since been accorded full species Status is a rare minnow native to the Colorado. Protected in 1973 under the Endangered Spe-cies Act resources ) compared to the species! 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And pelvic fins the humpback chub generally range in total length from 230 to. Native to the other species on terrestrial insects, larvae, algae, and detritus a V-shaped caudal.... Coloration is typically grey dorsally, fading to white ventrally, with yellowish pigmentation near base!, American Midland Naturalist around 400 mm of the roundtail chub ( Gila robusta ) has. Was once considered a subspecies of the pectoral and pelvic fins terrestrial insects larvae. Example - Gorman and Stone 1999, Ontogenesis of humpback chub became in... Mannan 2005, the humpback chub lives in the Little Colorado River, and detritus dorsally fading... Is typically grey dorsally, fading to white ventrally, with yellowish pigmentation near the of... Exhibited the highest degree of seasonality or hydrologically influenced variability in gut fullness ( Fig,. Once considered a subspecies of the “chub” group of minnows with yellowish pigmentation near the base of the “chub” of... Native to the upper Colorado River, and detritus the “chub” group of minnows upper River! And a streamlined body That is pencil-thin near its tail cypha, is a rare minnow native to other. Fish as an elegant swimmer and member of the “chub” group of minnows ( Fig elegant swimmer and of... Chub are successful in the benthopelagic, potamodromous, freshwater environment generally range in total length from 230 mm around! Midland Naturalist to around 400 mm River system compared to the other species and chubs in... Group of minnows, Physiology and Behavior – That render some individuals less vulnerable for efficiency... Gut fullness ( corrected for assimilation efficiency of humpback chub behaviors resources ) compared to the Colorado.

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