AGNR 301 Lecture Notes - Lecture 33: Short-Chain Fatty Acid, Epithelium, Limiting Factor
4 Dec 2017
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Document Summary
Benefits of normal microbiota: competitive exclusion- resistance to colonization by pathogenic and nonindigenous microbes, stimulate development of intestinal host defenses (antibodies, cytotoxic and helper. Costs of normal microflora: competition for nutrients and production of toxic amino acid catabolites, decreased fat digestibility, requirement for increased mucus secretion and gut epithelial cell turnover, 2009 aquaculture navigates through troubled waters. Industrialized aquaculture- world"s fastest growing animal food production system. Not using antibiotics could endanger wild populations in some cases such as salmon- the fish would be more exposed to unhealthy farm fish that could escape into the wild. Aquaculture has been cited as a way to reduce global reliance on seas in the future. Critics: aquaculture"s risks to ocean populations are more serious than potential gains- discharging excessive nutrients into estuaries: 2011 sustainability challenges of phosphorous and food- solutions from closing the human phosphorous cycle.
