The Razorback Sucker

The Razorback Sucker


prohibited all year

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The Razorback Sucker belongs to the Catostomidae family. It is a relatively large catostomidae, reaching more than 91 cm in length and weighing 5 to 6 kg. It has a lifespan of 50 years. It nests from January to June. It cannot be fished because of its status as an endangered species.
Razorback suckers are similar to other Catostomidae, with the exception of two main characteristics. The most characteristic features of the razorback sucker are a pronounced edge made of neural and internal bone that extends from the head to the dorsal fins, as well as elongated filaments on the gills. Females have a lower keel. Well-developed filaments are made for zooplankton feeding. It has a long snout, a long rounded head that is ventrally compressed and a ventral mouth with a split lower lip. There is 12 to 15 rays on the dorsal fin and the anal fin has 7 rays. Pelvic and anal fins are longer in males. It has an almost straight lateral line with 68 to 87 scales.

The Razorback Sucker lifestyle

The larvae eat mainly phytoplankton and zooplankton. Adults feed on planktonic crustaceans, diatoms, filamentous algae and detritus.
Spawning can happen in a variety of environments, including main currents, river-influenced impoundments and wave-washed impoundments, mainly on a coarse sand substrate. The temperature associated with the best percentage of razor eggs hatching is 20 degrees Celsius. Spawning period is when razorback suckers are most active and can travel from 0 to 112.7 km. When fish reach their spawning grounds, they are near the bottom, in large aggregates. When the females are ready to mate, they leave the group, followed by one or more males, and move downwards. After spawning, which lasts up to three minutes, the fish return to the group. Females can spawn repeatedly for one hour and/or several days.

The Razorback Sucker habitat

Historically found in the Colorado River Drainage, this fish has become very rare over the Grand Canyon. In Colorado, recent specimens have only been collected from the lower Colorado, Gunnison, Yampa and Green rivers.
It is an important river species that is not found in major tributaries and rivers. Found in water at a depth of 121 to 304 cm, adults are associated with strong current areas and return waters. Many specimens collected in recent years come from reservoirs and reservoirs located downstream of rivers. The miller eats invertebrates and algae. Mature adults were observed in Colorado at several locations in late May and early June, although the exact habitat requirements for successful spawning are unknown.

The Razorback Sucker angling

The Razorback sucker is an endangered species. The fishing is therefore prohibited.

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