Causes of Global Warming Essay

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About 13.5% of known causes of global warming come from Agriculture (PCC 2007) and the contribution from aquaculture production as a result of excess and undigested nutrients is sizeable and should be checked.
Fish when fed use the nutrient given for maintance, growth and for production purposes but beyond the need of the fish, the excess nutrients are voided, depleting water quality parameters, increasing cost of production, ammonia concentration and invariably have ecological consequences.
Fish obtain energy from protein and non protein sources but the use of protein energy is wasteful from nutritional, economic, and ecological points of view (Manjappa et al 2002). Energy utilization and metabolism from carbohydrate or lipid sources in
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On the other hand, high protein content will increase feed cost, growth rate and the feed conversion efficiency among others (Lovel 1989).
Fish enzyme cocktail both digestive and metabolic, nutrient digestibility and carcass composition have been used to evaluate the efficiency of nutrients supplied to animals (Xiong et al 2010, Melo et al 2012) and invariably growth performance.
By studying the digestion and assimilation of specific dietary components, we could identify the animals preferred prey and those that they are best equipped to digest in relation to the enzyme cocktail within the fish.
Digestive enzyme activities studies could be an effective tool for identifying particular components of an animal’s diet; in that the nature of enzymes secreted is related to the meal the animal can assimilate and its biochemical capability at optimizing the diet (Sua´rez et al., 1995, Zeng and Cohen, 2000, Torres and Boyd, 2009). High proteolytic activity is an indication of a diet high in protein, high carbohydrase activity reflects probably a diet high in starch or cellulose, and high lipase activities could reflect a diet high in fat (Johnston, 2003). Therefore the measurement of specific activities like the proteases, carbohydrases and lipases may provide information about the whole digestive capacity and the efficiency of species reared to use

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