FT Vol.47(1)
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- ItemProtective Effect of Fish Oil on 4-Nitroquinoline-1- Oxide (4NQO)-Induced Oral Carcinogenesis in Rats(Society of Fisheries Technologists (India)Cochin, 2010)The present investigation was carried out to study the chemo-preventive potential of fish oil against oxidative stress in 4-nitroquinoline-1-oxide (4NQO) induced oral carcinogenesis by measuring the levels of lipid peroxidation markers, antioxidants, and various serum enzyme activities. Fish oil was administered for 15 days, and changes in the levels of lipid peroxidation markers viz. malonaldehyde (MDA) and conjugated dienes (CD) and antioxidants like superoxide dismutase, catalase, reduced glutathione, glutathione-Stransferase and glutathione peroxidase were evaluated. The serum enzyme activities like alanine transaminase, aspartate transaminase, lactate dehydrogenase, creatine phosphokinase and alkaline phosphatase were also examined in normal and 4NQO-administered rats. A significant increase in the activities of antioxidants and a decrease in the formation of MDA and conjugated dienes were observed in oral tissues on treatment with fish oil. The administration of fish oil also significantly reduced the serum enzyme activities. The antioxidant effect of fish oil might be due to the incorporation of eicosapentaenoic acid which is the major component of fish oil, into the membrane phospholipids of oral tissue, thus protecting the cells from the oxidative stress induced by 4NQO
- ItemLength-weight Relationship and Relative Condition Factor of Puntius carnaticus (Jerdon, 1849)(Society of Fisheries Technologists (India)Cochin, 2010)The length-weight relationship of Puntius carnaticus (Jerdon, 1849) was calculated for males, females and indeterminates. The relationship was analyzed using the formula W = aLb which was further transformed into Log W = a+ b log L. A total of 882 specimens comprising 262 males, 150 females and 470 indeterminates with size groups ranging from 52 to 472 mm total length(TL) were used. The equation obtained for males was: log W = - 4.1567 + 2.7148 log L; for females: log W = - 4.5089 + 2.8618 log L; and for indeterminates: log W = - 0.9611+1.4243 log L. The regression coefficients between males and females did not show any significant difference while significant difference could be noticed between males and indeterminates and between females and indeterminates (p<0.01). Studies on relative condition factor (Kn) of P.carnaticus revealed that the fluctuations in ‘Kn’ values can be attributed to spawning cycle as well as feeding intensity
- ItemEnergy Analysis of the Stake Net Operations, in Vembanad Lake, Kerala, India(Society of Fisheries Technologists (India)Cochin, 2010)Boopendranath & Hameed (2009) has determined GER per tonne of fish landed by non-motorised gill netting operations as 0.61. GER value per tonne of fish landed by stake net operations (5.19 GJ) was higher than nonmotorised gill netting operations by a factor of 8.5. The predominance of juveniles in the stake net landings has been reported by Mammen (1984), Kurup et al. George et al. (1998), (1993), Thomas et al. (1999), Vijayan et al. (2000), Thomas et al. 2007) and others. The stake net operations in the Vembanad lake need to be strictly regulated in view of the high GER of the stake net operations and predominance of juveniles in the landings
- ItemBiochemical Changes during Gonadal Maturation in Portunus pelagicus (Linnaeus, 1758)(Society of Fisheries Technologists (India)Cochin, 2010)The analysis of biochemical constituents during different maturity stages of P. pelagicus showed changes in the accumulation of organic reserves in the ovary, hepatopancreas and haemolymph. Considerable reduction was noticed in the moisture content, which could be due to the continuous deposition of organic matter in hepatic and ovarian tissuesduring maturation. The increase of the biochemical constituents in the haemolymph with the progress of vitellogenesis, indicates its role as a carrier of nutrients between different tissues. The mobilization of protein from the hepatopancreas to the ovary during maturation was demonstrated by a steady decrease of the same in the hepatopancreas. There was a gradual increase of protein in the ovary which reached the maximum at the mature stage
- ItemAwareness of Fisherfolk on Fisheries Resource Management Issues: A Case Study(Society of Fisheries Technologists (India)Cochin, 2010)The low level of awareness of fishermen on pollution problems and their reluctance to follow and adopt the hygienic practices could be reduced by conducting sufficient onshore pollution abatement programmes and training and demonstration on onboard hygienic handling. Once the fishermen are assured of getting higher prices for their fish catch they will readily come forward to adopt any practices even if they have to incur additional costs. This is more evident by the large scale adoption of Global Positioning System by the present generation fishermen. Hence it is imperative of all other stakeholders to encourage fishermen to change their attitude towardsfisheries resources and development measures to the present trend