Conference paper (QAM)

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Browsing Conference paper (QAM) by Author "Badonia, R."

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    Accessory DNA elements as biodiversity markers
    (Fisheries Survey of India, 1998) Sen, Arnab; Zynudheen, A.A.; Ashok Kumar, K.; Ravishankar, C.N.; Badonia, R.; Solanki, K.K.
    Accessory DNA elements whether they be virus, plasmids or transposable elements have in common the ability to over-replicate the DNA, with respect to their hosts. The sophisticated bio-chemical and regulatory mechanisms of many accessory elements suggest that they are the products of long term selection. Bacterial euchromosomal genes are generally co-adapted complexes, so any genetic inter change is mostly deleterious. Accessory genes on the other hand are transferable among the different strains or species of bacteria and are selected to function successfully in all of them. Accessory DNA could serve as mapping zones of biodiversity and could reflect on the nature of survival and adaptation of bacteria in an ever changing environment.
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    Monitoring of cadmium accumulation in cephalopods processed in gujarat coast
    (Asian Fisheries Society, 2009) Murthy, L.N.; Panda, S.K.; Khasim, D.I.; Badonia, R.
    Heavy metal accumulation in cephalopods has been one of the intricate issues in seafood export scenario in India. In recent years, many export consignments of cephalopods processed in Gujarat region were rejected on account of high levels of cadmium. To elucidate this problem, cephalopods landed at different landing centres and processed by various processing units were monitored during the period 2006-07. Among commercial samples of cephalopods, cuttlefish tentacles (0.52±0.08 ppm), squid tentacles (0.28±0.02 ppm) and frozen octopus (0.59±0.1 ppm) recorded highest accumulation of Cadmium. Organ-specific analysis revealed highest accumulation of Cd in the gut of Sepiella inermis (3.34±0.43 ppm) and Squid Uroteuthis (Photololigo) duvauceli (5.31±0.43 ppm). Similarly, in the Purpleback flying squid Sthenoteuthis oualaniensis, which is now a days landed by multiday fishing trawlers, highest residue level of Cd was observed in the liver (568.5 ±15 ppm), followed by gills, eyes and tentacles. Among different species of Octopus, highest accumulation was recorded in Octopus macropus (2.28± 1.11 ppm), followed by O. membranaceus (1.86 ±0.35 ppm) and O. defilippi (1.72 ±0.82 ppm). In order to find out the source of Cd, simulation studies were carried out by soaking squid muscle in ink, signifying the fact that poor post harvest handing and consequent rupture of ink sac, followed by soaking in ink-mixed water could be a reason behind high levels of Cd accumulation in cephalopods landed in Gujarat coast.