The horned chub, or Semotilus atromaculatus, is a common freshwater fish in Quebec, often found in rivers, streams, and ponds. Although it is not a prized target for sport fishing due to its small size and low fighting ability, it is nevertheless interesting for beginner anglers or youth who wish to get familiar with fishing. Widely distributed in the watersheds of Quebec, the horned chub plays an important ecological role by serving as prey for many aquatic predators.

The horned chub has an elongated and slightly laterally compressed body, covered with cycloid scales. Its color varies from olive brown on the back, fading to a lighter shade on the sides and belly. A dark lateral band extends from the snout to the base of the tail, often more pronounced in young individuals. Its mouth is terminal, slightly oblique, with a small pair of barbels at the corner of the lips. The fins are generally translucent with yellowish reflections. Males, during spawning, develop nuptial tubercles or "horns" on their heads, hence their common name. Females are generally larger and rounder than males, especially when carrying eggs.

The horned chub is widely distributed throughout Quebec, particularly abundant in the rivers and streams of the St. Lawrence, Outaouais, and Baie-James watersheds. It is also found in small shallow lakes and ponds. It is absent from deep waters and saltwater. Due to its tolerance to a variety of environmental conditions, this species is well adapted to different regions of Quebec.

The horned chub prefers clear to slightly murky waters of streams, rivers, and ponds. It likes shallow areas with gravel or sandy bottoms, where it can easily find food. Structures such as rocks, roots, and aquatic plants provide shelter and are ideal spots to look for this fish. It is often observed near the shores, where it feeds and spawns. Although it can tolerate varied temperatures, it is more active in moderately warm waters, around 15 to 22 °C.

The spawning of the horned chub occurs in spring, when the water temperature reaches about 15 °C. Males build nests in shallow gravel areas and vigorously defend their territory against intruders. Females lay several hundred eggs in these nests, which hatch after about a week. The fry develop quickly and reach sexual maturity in one to two years. The longevity of the horned chub is generally 4 to 6 years.

Spring → Spawning → Summer → Growth → Fall → Preparation for winter → Winter → Slowed metabolism.

The horned chub is a social fish, often observed in small groups, especially outside of the spawning season. It is territorial during reproduction, with males becoming aggressive to protect their nest. This fish is relatively tolerant of noise and light changes, although it prefers less disturbed waters from wind and strong currents. It is more active at dusk and dawn when the light is soft.

The diet of the horned chub is varied. Young fish primarily feed on zooplankton and aquatic insects. As they grow, they add small crustaceans, insect larvae, and plant matter to their menu. Adults also consume small fish and fish eggs, making them opportunistic predators. In winter, their metabolism slows down, and they feed less frequently.

In spring, the horned chub is very active, especially during spawning. This is the best time to observe them in large numbers. In summer, they are more dispersed but remain active, especially early in the morning and late in the evening. Fall is a preparation period for winter, and the horned chub feeds intensively to build reserves. In winter, their activity decreases significantly, and they tend to stay in deeper waters where the temperature is more stable. Weather conditions like overcast skies or light rain can stimulate their activity, while strong winds and high pressure make them more discreet.

In clear waters, opt for lures in natural colors like brown or green that mimic local prey. In murky water, favor brighter colors, such as yellow or orange, to attract the horned chub's attention. On sunny days, lures with metallic reflections can be effective, while in overcast conditions, matte colors are preferable. In deeper waters, use lures that emit vibrations to compensate for low visibility.

For the horned chub, an ultralight fishing rod of 1.5 to 2.1 meters with a fast action is ideal. Pair it with a small open-faced reel. Use a line of 2 to 4 lb for a delicate presentation. Hooks size 8 to 12 are recommended, especially if you're using natural baits like worms. A fluorocarbon leader is advised for its invisibility in water.

Handle the horned chub with care, as its skin is delicate. Use wet hands to avoid damaging its protective mucus. For a successful release, ensure the fish is well-oxygenated before letting it go. For photos, avoid keeping it out of the water for too long and support it properly to prevent injury.

The horned chub is preyed upon by several aquatic predators such as pike and perch. Birds like herons and kingfishers also enjoy them. These predators play a crucial role in maintaining ecological balance.

The horned chub is not considered a threatened species in Quebec. Its population is stable due to its adaptability to various environments. It is subject to little regulation, but catch and release is encouraged to maintain local populations.