The brass minnow is a small freshwater fish that, while not a prized target for sport fishermen, plays a crucial role in the aquatic ecosystem of Quebec. Often used as bait for larger species, it is found in many rivers and lakes. This fish is highly valued for its ability to survive in varied conditions and contribute to the food chain by serving as prey for many predators. The brass minnow is widespread in several regions of Quebec, especially in the watersheds of southern province.

The brass minnow is distinguished by its fusiform and relatively slender body, typically reaching a length of 5 to 8 cm. Its color is a mix of silver tones with golden reflections, which gives it its name. It has a terminal mouth slightly oriented upwards, which is typical of fish that feed near the surface. Its fins are generally clear, with yellowish hues. The caudal fin is slightly forked, facilitating quick movements in the water. The scales are small and well-aligned, providing some protection against predators. The young are often paler than the adults, while the males may develop nuptial tubercles during the spawning period, distinguishing them from the females.

In Quebec, the brass minnow is mainly found in the southern part of the province, including the watersheds of the St. Lawrence River and the Ottawa River. It is less common in the north, where conditions are less favorable for its survival. This fish prefers clear and slightly flowing waters, although it can also be found in shallow lakes. Its presence is often a good indicator of the ecological health of a water body due to its moderate tolerance to changing conditions.

The brass minnow frequents the shallow waters of rivers and lakes, often near the shores where aquatic vegetation is abundant. It prefers areas where the current is moderate to low, allowing it to feed easily. This fish is generally found at depths of less than 2 meters, where the water temperature is higher and food is more abundant. Clear and well-oxygenated waters are ideal for it, although it can tolerate some turbidity, especially in areas where vegetation is dense.

The reproduction of the brass minnow begins in the spring when the water temperature reaches about 16 °C. The males then develop nuptial tubercles to attract females. Spawning occurs in shallow areas, often among aquatic vegetation, where the eggs can be safely deposited. The eggs hatch after about a week, and the fry quickly begin to feed on plankton. Growth is rapid, with sexual maturity reached in the first or second year. The lifespan of the brass minnow is relatively short, often between 3 and 5 years.

Spring → Spawning → Summer → Rapid growth → Autumn → Accumulation of reserves → Winter → Rest period

The brass minnow is a schooling fish, living in small shoals to protect itself from predators. Non-territorial, it willingly shares its space with other fish species. It is quite resilient to changing weather conditions and can adapt to variations in light and temperature. Although sensitive to loud noises, it is not particularly affected by winds or changes in atmospheric pressure.

The diet of the brass minnow varies throughout its life. Fry primarily feed on plankton, while adults consume a variety of aquatic invertebrates, algae, and organic debris. In summer, when food is abundant, they feed more intensively to accumulate reserves. In winter, their metabolism slows down and their consumption decreases, leading them to feed more opportunistically.

In spring, the brass minnow is more active during the day, taking advantage of warmer temperatures to feed and spawn. In summer, it stays in shaded or deeper areas during the hottest hours, becoming more active early in the morning and late in the afternoon. In autumn, it prepares for winter by increasing its food intake. In winter, it becomes less active, remaining in deeper waters with stable temperatures. Cloudy or rainy days do not bother it, and it is little affected by variations in atmospheric pressure.

For the brass minnow, lures are generally not used, as it is primarily a bait fish. However, if you are looking to attract it for observations or studies, small-sized lures in natural colors, such as brown or green, may stimulate its curiosity in clear waters. In murkier waters, slightly brighter colors like pale yellow can be effective.

To capture the brass minnow, an ultralight rod of 1.5 to 2 meters is ideal, with a fast action to feel the light bites. A light reel with a 2 to 4 lb line is sufficient, given the modest size of the fish. Use hooks size 10 to 14 to avoid damaging the fish. A leader line is generally not necessary, unless you are fishing in waters where predators might bite.

Handle the brass minnow with care, holding it gently to avoid damaging its scales. If you wish to release it back into the water, do so quickly to minimize stress. To take a photo, keep it near the water and ensure your hands are wet to protect its mucous layer.

Natural predators of the brass minnow include larger fish such as pike and walleye, as well as aquatic birds such as herons and diving ducks. These predators play an essential role in controlling minnow populations, ensuring ecological balance.

The brass minnow is not considered a threatened species in Quebec. Its population is stable, although habitat degradation may pose local risks. No specific regulations apply to its capture, but catch and release is encouraged to maintain local populations, especially in watersheds where it plays a crucial ecological role.