PhD Theses (SACON)
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Item Levels of metal contamination in various species of birds in select states in India.(SACON, 2019) Kirubhanandhini, V.; Murlidharan, S.In India, studies on metal contamination on birds are a few. There is a growing concern to examine metal contamination in birds and interpret their levels; thereby appropriate measures may be taken to conserve the species. Metal levels in tissues can serve as an indication of the potential effects for alerting managers and the public to mitigating ecological problems. The presence of metal contaminants in tissues of birds is a problem that has not been fully resolved, given the ethical and legal impediments associated with the hunting and killing of bird species. The use of body feathers for studying metal contamination is another possible solution to this problem, as removal of these feathers does not injure the birds. In reference of seabirds, breast feathers are especially useful for establishing spatio and temporal patterns in bird populations and for evaluating metal contamination in species that are threatened or in danger of extinction. The present study was conducted with objective to document the levels of accumulalion of metals such as Cd, Pb, Cr, Ni , Cu and Zn in different species of birds in select states of India.Item Levels of organic contaminates and select biomarkers in the birds of Gujarat and Tamil Nadu, India(SACON, 2009) Dhananjayan, V.; Murlidharan, S.There has been an ongoing concern about the presence of different types of contaminants in the environment and their ill effects on wildlife, particularly birds. While substantial information is available on such in effects on birds elsewhere in the world , very limited data exist in India, A study was initiated to document the environmental residue levels of certain persistent organic contaminants, chemicals responsible for incidences of mortality of birds and, generate information on the levels of cholinesterase in brain and blood plasma of birds. The major objectives were to understand tissue specific accumulation of contaminants, namely organochlorine pesticides (OCPs), polychlorinated biphenyls (PCBs) and polycyclic a romatic hydrocarbons (PAHs) in birds, examine the variation in accumulation pattern between sexes and feeding habits, identify normal or reference levels of biomarkers, namely acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) to explain mortality of birds. Two representative cities, namely Ahmedabad, Gujarat in the west and Coimbatore, Tamil Nadu in the south were selected as study locations