How to choose fishing position when fishing in summer meets windy weather? Will dissolved oxygen be high when the temperature is low?
Fishing proverb says, "If a fish catches the loaf about, it is necessary to catch the wind and waves." Under normal circumstances, when fishing in windy weather, the fishing position should be chosen against the wind. This is because in some natural waters, natural food is very limited, and fish can't find food without water, so they can only rely on the sky to supplement it. Every time after a strong wind, some insects and leafy plants are blown into the water.
where there is wind, there are waves, which are beneficial to dissolve oxygen in water. There is plenty of oxygen and plenty of food. At this time, it is the time when the fish are full of food, and the bait is welcome. In addition, under the action of wind, the flowing water in the lower layer of water body is generally opposite to the wind direction, which coincides with the habit of benthic fish going upstream. As long as the water temperature is right and the wind speed is not very strong, crucian carp, carp and other fish will gather from all directions to the windward shore and swim for food. Naturally, the fish rate is quite high here. It's better to fish in the bright water area than in the water grass area when it's windy
Fish in summer never like calm weather, but in some windy days, it's better to fish in rainy days. In these days, the water temperature will be lowered, the dissolved oxygen in the water will be higher, and the food on the shore will be scraped into the water. At this time, the fish will swim from the grass to the tuyere to find food (because it is hard to get a pile of food here, otherwise it will be eaten by other fish). Therefore, when it is windy, it is better to catch bright water areas than water grass areas.
The water source with low temperature and high dissolved oxygen continuously flows into the water body. Because of the large proportion of low temperature water, it is directly replenished to the bottom of the water body, resulting in the water bottom having more dissolved oxygen than the water surface. However, in the fishing point selection, it is "the place where living water flows in, bringing oxygen and food", not the water depth and the large amount of cold dissolved oxygen. Because it is far from the water inlet, the water body will return to equilibrium under the action of diffusion and the action of aquatic organisms. Further away, the dissolved oxygen on the water surface is large.
Many tiny oxygen bubbles (or gas bubbles) are made at the bottom of the water. The gas inside these bubbles has an interface just like the water outside the bubbles, which is equivalent to adding an interface at the bottom of the water. At this time, because the oxygen has a high dissolution rate in low-temperature and high-pressure water, the dissolved oxygen at the bottom of the water will be greater than the water surface. The purpose of fine bubbles is to increase the interface area and promote the rapid integration of oxygen into the water. Such conditions cannot be found in natural waters. When the temperature is too high
, the solubility of oxygen in water decreases with the increase of temperature. For example, when the water temperature rises from 1 to 35 at atmospheric pressure, the solubility of oxygen in the air rises from 11.27mg/ L to 6.93mg/ L, which will lead to the decrease of dissolved oxygen at high temperature. In addition, the oxygen consumption of fish at high temperature is increased due to the increase of eating and exercise, which is also the key reason for the lack of dissolved oxygen. Inorganic oxidation
Hydrogen sulfide and sodium nitrite existing in the water and sludge of aquaculture ponds are oxidized, which consumes a lot of dissolved oxygen. Degradation of organic matter
The decomposition of a large number of organic matter (such as the feces of pigs, ducks, chickens, pigeons and other livestock fed by the pond head together) consumes a lot of oxygen in the water body, resulting in hypoxia.