Save The Fish

Effects on Fish By Water Pollution

Research Question

What would be the impact on fish if water was preserved and not polluted?

Types of Water Pollution

There are many types of pollution that could infect many different fish in different ways. So I gave a few examples to tell about what they might do to the little fish.
Putrecible organic materials are considered a domestic and industrial waste where oxygen is needed for decomposition of organic matter. The measure of the oxygen requirement is referred to as the biochemical oxygen demand or BOD for short. The larger the BOD gets, due to a greater amount of organic load, or a considerable mixing of the water, a condition of abnormally low hypoxia (dissolved oxygen) occurs. It is this hypoxia that effects the fish in the body of water.

Toxic Chemicals also produces hypoxia and are the most important types of water pollution that affect fish. There are about 65,000 industrial chemicals used, and every day they add 3 to 5 new ones into the mix. Lucky for us, only a small percentage of these chemicals enter the waterways, but the possibilities are endless. The major classes of toxic chemicals that affect fish are: metals, chlorine, cyanides, ammonia, detergents, acids, pesticides, polychlorinated biphenyls, petroleum hydrocarbons, pulpmill effluents, and many others.

Effects on the Fish

There are also many different ways the fish could be effected. So I listed out a few to show you.

Pollution affects the health of a fish in many different ways. Many fish kills are caused from the contamination of the waterways by pesticides. The low levels of discharge might result in the accumulation of the pollutants in aquatic organisms. Some end results include immunosuppression, reduced metabolism, and damage to gills. Many studies have indicated that there is a greater proportion of diseased fish in polluted waters than in non-polluted waters.

Pollution also affects the behaviour of many fish. Out of 19 studies, 11 found a change in the behaviour of a fish. Also studies of parental care have found a decrease of nest-building activity, a decrease of offspring defence, and different changes in the division of parental care between the two genders. The many links between pollution and behaviour suggests that there are impacts on reproduction, genetic changes in the populations, and population sizes.

My Answer

I think that if we preserve the water instead of polluting it we would have a better marine life. There would be a lower percentage of endangering fish and not to mention more water for us to use. But not use too much, that's a different story. More studies could be conducted upon the marine life because there would be a life to study. If we keep polluting the waters, in time there would be no marine life.

Where Did I Find This

(Heath, Alan G. "Google Books." Google Books. N.p., n.d. Web. 05 Jan. 2014.)(B, Austin. "Result Filters." National Center for Biotechnology Information. U.S. National Library of Medicine, 1998. Web. 08 Jan. 2014.)
(Jones, Jackie C., and John D. Reynolds. "Effects of Pollution on Reproductive Behaviour of Fishes - Springer." Effects of Pollution on Reproductive Behaviour of Fishes - Springer. N.p., 10 Jan. 1997. Web. 10 Jan. 2014.)