Illumination of the aquatic environment to a large extent determines the motor and nutritional activity of fish, and color vision is used by them to recognize aquatic and plant organisms by their color. In some fish, color vision serves to reflexively change color for protective purposes.
Daily changes in the intensity of illumination are the cause of daily vertical migrations of fish. For each fish species, there is a certain limit to solar radiation, above which the conditions for them become unfavorable, and then they sink to a depth or take shelter in shaded places and stop eating. This is confirmed by the behavior of fish in cloudy weather – they remain active throughout the daylight hours. By the way, invertebrates, crustaceans, leading a bottom or bottom lifestyle, do not tolerate direct sunlight. Continue reading
How to catch winter crucian on a shallow career
Catching crucian carp in winter is very entertaining, but requires great patience.
Fishing is all the more interesting because there are a lot of quarries around modern cities. For example, peat shallow careers. These bodies of water usually have a flat bottom, covered with a layer of bottom sludge. There crucian wintering, burying themselves in soft soil.
There is enough food in such a quarry for crucian carp, but in cold water, if there is deep silt at the bottom, the fish completely loses activity. Any need for food for crucian carp in a peat quarry disappears in the fall. Continue reading
For fishermen-athletes, the most interesting are salmon and trout, which are caught on sports equipment. These fish willingly grab baubles and other artificial baits, but are very stubborn when fishing them after being caught on a fishing rod.
Salmon-semga reaches 1.5 meters in length and 40 kilograms in weight. It spawns from late August to October, in areas with a fast flow and soil of gravel and small pebble. On the Kola Peninsula, in the Kola, Tuloma and Niva rivers, salmon enter in spring H in mid-May, in summer H in mid-June and in August. Salmon enter the Neva, Luga, Narova and other smaller rivers flowing into the Gulf of Finland from July 10–12 until the end of the month, and then from mid-August to mid-September. Continue reading