explain the following fresh water fish excrete ammonia
Answers
Nitrogenous wastes in the body tend to form toxic ammonia, which must be excreted. Mammals such as humans excrete urea, while birds, reptiles, and some terrestrial invertebrates produce uric acid as waste. Uricothelic organisms tend to excrete uric acid waste in the form of a white paste or powder.
They come in the water from your fish store and in the waste the fish produce. The waste which supplies these good bacteria is the reason why the bacteria are so necessary. Fish produce ammonia in their solid waste and excrete it through their gills. Over time, the ammonia builds up to toxic levels.
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Excretion of ammonia by freshwater fish is explained below:
Answer:
1. Fishes living in freshwater are generally amonotelic. This means that these fishes excretes only ammonia. Whereas the fishes living in marine ecosystem excretes urea and hence they are regarded as ureotelic.
2. The freshwater fish excretes ammonia through their gills or across their gills. If ammonia is not excreted through their body, ammonia can get accumulated inside the body of fish leading to damage of internal organs and gills of fish and may even lead to death.
3. The symptoms that can be seen in fishes if the level of ammonia is increased in them are: loss of appetite may occur in them, they may feel lethargic, inflammation may occur in their gills, fins and eyes, colour of body also darkens.
4. The fishes of fresh water are hypertonic with respect to their surroundings. This indicates that concentration of water in their blood is in low level in comparison to their surroundings.
5. So, they have to remove the extra amount of water from their blood. This is done by their kidney and by gills.
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