Category : The Fish Environment

The final cocktail The final cocktail we call “water” is complex and, as we have seen, varies with atmospheric and local land conditions. In general, water from our tap will contain: major ions┬ásuch as sodium, potassium, magnesium, calcium, sulphates, chlorides and hydrogen carbonate. These are usually present in quantities of at least 1 mg/l. All ..

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Rain and Water Quality Pure natural water is formed mainly by evaporation from seas and lakes. As warm water vapour rises it meets cooler air and condenses into water droplets (just like hot water vapour rising from a bath and condensing into droplets on the cool bathroom walls). The water droplets begin to dissolve a ..

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Without osmoregulation fish will die Osmoregulation is the control of the concentration of body fluids. If a fish is unable to regulate the effects of osmosis it will die. Clearly, osmoregulation is a vital function affecting all aspects of fish health. Osmosis, diffusion and fish health If we look at the structure of the gill ..

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