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Concept of Aquatic Weeds in Fish Culture: Weeds are unwanted plants that grow where they are not wanted. Aquatic weeds are plants that grow in the pond where they are not wanted. These weeds, even though are not wanted in the pond by the farmer because of their effect mainly, some of them are essential parts of natural systems and form the basis of water body’s health and productivity. The habitat for aquatic weeds involve various proportions of water and soil, including intermittently wet ditches, ditches which always hold standing water, streams, stock ponds, farm ponds, lakes, ornamental ponds, and intermediate habitats.

Wetlands perform numerous valuable functions such as recycle nutrients, purify water, attenuate floods, maintain stream flow, recharge ground water, and also serve in providing drinking water source, fish, fodder, fuel, recreation to the society. The interaction of man with wetlands during the last few decades has been a concern largely due to land loss – accompanied by intensified industrial, commercial, and residential development further leading to pollution of wetlands by domestic, industrial sewage, and agricultural runoffs- as fertilizers, insecticides. The fact that wetland values are overlooked has resulted in threat to the source of these benefits South Indian wetlands are being lost on account of various anthropogenic activities .

Fish is a animal source protein. It is one of the neglected areas because of unawareness among farming community, unfavorable government policies and high inputs involved in fish farming. Fish being rich in nutrients can help to alleviate the malnutrition of the local population. Fish plays an important role in the diet of the people of developing nations. In India, fish and fishing contribute immensely to the national economy by providing high animal food protein and generating employment, which is a means of poverty alleviation. Most importantly, it is the source of livelihood for a large section of economically backward population of the country. Integrated livestock farming will be novel approach for profitable and rumerative fish production. Poultry droppings can be a good source of nutrients for enhancing the productivity of aquatic production systems.

Millions of years created water in symbiosis with the biota. For several hundred years a man has been trying to unravel her secrets. Can not. Uses it, just as a working body. It is a mobile very complex solvent and a supplier of substances to each object, living creatures and plants on Earth. The path of its transformation in the circuit: soil – flora and fauna – evaporation – the atmosphere is the soil. In each of these links it changes its properties, appearance, structure. Man for his development and comfort shortens this path. We deprive her of her main destiny in advancing through food and vegetable channels. We destroyed the biota with arable land, reservoirs, dumps, asphalt. This territory has become more than 60 percent of the land inhabited by the area and every day it grows.

Human immunodeficiency virus infection and acquired immune deficiency syndrome (HIV/AIDS) is a spectrum of conditions caused by infection with the human immunodeficiency virus (HIV). Following initial infection, a person may not notice any symptoms or may experience a brief period of influenza-like illness. Typically, this is followed by a prolonged period with no symptoms. As the infection progresses, it interferes more with the immune system, increasing the risk of common infections like tuberculosis, as well as other opportunistic infections, and tumors that rarely affect people who have working immune systems. These late symptoms of infection are referred to as AIDS. This stage is often also associated with weight loss. HIV is spread primarily by unprotected sex (including anal and oral sex), contaminated blood transfusions, hypodermic needles, and from mother to child during pregnancy, delivery, or breastfeeding. Some bodily fluids, such as saliva and tears, do not transmit HIV.

Minerals play an important role in bulls as they function to form mucles of and maintain the quality of sperm. Zn mineral in the diet will also affect the levels of calcium and phosphorus in the blood. The objective of this study was to determine the effect of Zn supplementation on the levels of calcium and phosphate serum in Friesian Holstein bulls. This study used ten Friesian Holstein bulls, 16-18 months old and divided into two groups, consisting of five bulls each, i.e. with no added Zn (control) and 60 ppm of Zn supplementation, respectively. Zinc was administered daily for four months. Blood samples were taken before treatment and after the four- month treatment for the examination of calcium and phosphate levels. The result showed that 60 ppm Zn supplementation was not significantly different (p>0.05) on the blood calcium and phosphate levels. However, the calcium level tends to increase while that of phosphate tends to decrease.