3/28/2023 0 Comments Define fishing in the dark![]() And in warmer water the dissolved oxygen level is at its lowest yet a fish's metabolic rate is at its highest - the fish requires the greatest amount of oxygen when the least amount of dissolved oxygen is available. It is interesting to note the paradox that in cold water the dissolved oxygen level is at its highest yet the fish’s metabolic rate is at its lowest - the fish requires the least amount of oxygen when the most dissolved oxygen is available. Each fish species therefor has a minimum water temperature below which it will not feed due to a low metabolic rate and a maximum water temperature above which it will not feed due to a lack of oxygen. The colder the water is the more dissolved oxygen it can hold and the warmer the water is the less dissolved oxygen it can hold. ![]() It enters the water in two ways - when aquatic plants engage in the process of photosynthesis and when air becomes trapped in water via the action of rapids, breaking waves or rainfall. Dissolved oxygen is a free roaming oxygen atom found in water that is not attached to a pair of hydrogen atoms. Fish do not use their gills to break down water molecules to extract oxygen but instead use their gills to extract dissolved oxygen from the surrounding water. In warm water fish are more inclined to feed as their metabolism and energy requirements are significantly higher.įish also require oxygen in order to live and, regardless of how high their metabolic rate is, will not feed if they are having difficulty breathing. ![]() In contrast, the warmer the water is the faster a fish's metabolism rate and the more active they are. A slow metabolism makes fish less inclined to feed as they require fewer calories to maintain their slower bodily functions. Fish are cold blooded creatures and unable to regulate their body temperature meaning the colder the water the slower the fish's metabolism is and the more torpid they are. Water temperature can either positively or negatively impact the quality of fishing because it affects the fish's willingness to feed. The purpose of this article is to examine in depth the question of exactly how various factors affect fishing by examining each aspect of the weather and how it affects the fish's behavior. In fact, most fishermen do not truly understand just how different a fish's environment is from our own and because they have a drastically different anatomy from Humans, atmospheric conditions and even the lunar cycle that have little direct effect on Humans can actually have a huge effect on fish. However, the answer to why fish don't bite on any given day is likely dependent on several variables ranging from water temperature, to barometric pressure, to turbidity, to wind speed and direction. Fish have to eat just like people do and if they refuse to feed on any given day there must be a reason for it. How many times have you had the experience where you have chosen what seemed to be the perfect day for going fishing only to have the fish completely ignore your bait, lure, or fly seemingly without reason? You’ve gone to the trouble of sourcing a variety of fresh baits or lures, the sun is setting, the water is calm, it’s a beautiful day but you don’t get a touch and end up leaving for home wondering why the fish weren’t biting.
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