FT Vol.43(1)
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- ItemLength-Weight Relationship of Priacanthus hamrur (Forsskal) Inhabiting the Continental Slopes Beyond 300m Depth Along the West Coast of India(Society of Fisheries Technologists (India)Cochin, 2006)The length-weight relationship of Priacanthus hamrur inhabiting the continental slopes beyond 300m along the west coast of India was estimated. The length-weight relationship was analyzed using the formulae W= a Lb which was further logarithmically transformed into Ln W=Ln a+b Log L. A total of 295 fishes comprising of 105 females and 190 males with size groups ranging from 196 to 297mm(TL) were used. The length-weight relationship of P. hamrur can be represented by the equations. Females W=0.0097 L305 and Males W=0.025 L2 73. While comparing the 'b' values of male, female and combined P.hamrur, it was understood that there was no significant difference among them. The value of the exponent 'b' computed in the parabolic equation for females did not show much variation for the isometric value of 3 whereas the value of b in males was found to be less indicating a very slight negative allometric growth. This was also reflected on the length-weight relationship of the combined population of P. hamrur.
- ItemGrowth Pattern and Competitiveness of Indian Shrimp Export Trade(Society of Fisheries Technologists (India)Cochin, 2006)Shrimp is the world's most important commodity accounting for about 19 percent of international seafood trade in value terms. In India's export trade shrimp contributed about 29 percent in quantity and 67 percent in value in the year 2002-2003. The present study was an attempt to critically examine compound growth rate and competitiveness of Indian shrimp in international seafood market based on the data collected from FAO fisheries statistics database, MPEDA statistics and Globe fish commodity update. The results indicated that India has been quite competitive in the shrimp trade, although there is a decline in the competitiveness of Indian shrimp in recent years. On the other hand, Thailand has emerged as a strong contender recording an increased competitiveness over the years. Certain policy measures are suggested to sustain the competitiveness of Indian shrimp exports in international market
- ItemEnsilation of Shrimp Waste by Lactobacillus fermentum(Society of Fisheries Technologists (India)Cochin, 2006)Ensilation of shrimp .waste was carried out with of Lactobacillus fermentum at room temperature (30+loC). Formic acid (0.4%) was used to adjust the pH to 5.8 at the start of the experiment. The pH of the medium fell sharply from 5.8 at the beginning to around 4.5 by 2'ld day and was more or less stable during the remaining part of ensilation. The protein content of the residue showed a decrease with a proportional increase in chitin content. The ash and crude fat content registered a decrease. The data on biochemical composition of the slurry revealed that the protein content, a amino nitrogen and NPN increased substantially during fermentation. The TVBN value remained constant at about 0.07% on dry weight basis during the period of observation. Protein solubilization of the order of 60% obtained during the present study was independent of initial bacterial density and is within the range of acceptability indicating that L. fermentum is an ideal candidate for use in biofermentation of shrimp waste
- ItemEffect of Endosulfan and 2,4-Dichlorophenoxy Acetic Acid on the Growth and Gonadal Development of Freshwater Prawn Macrobrachium lamarrei(Society of Fisheries Technologists (India)Cochin, 2006)The freshwater prawn Macrobrachium lamarni was subjected to acute (96 hr) static bioassay toxicity test with the pesticide endosulfan and the herbicide, 2,4-dichlorophenoxy acetic acid and the LC g, values were 0.009 ppm and 0.5 ppm respectively. When prawns were exposed for 30 days, under static condition, to five sub-lethal concentrations, viz., 0.008, 0.007, 0.006, 0.005 and 0.004 ppm of endosulfan and 0.4, 0.3, 0.2, 0.1 and 0.05 ppm of 2,4- diclorophenoxy acetic acid, the growth and the gonado-somatic index (GSI) were found to decrease in direct relation to increase in the concentration of the toxicants. However, there was an increase in growth at lower concentrations of endosulfan and acceleration in gonadal development at low concentration of 2,4-dichlorophenoxy acetic acid
- ItemAntibiotic Resistance Patterns of Escherichia coli and Salmonella from Environmental Samples of Thoothukudi Coast(Society of Fisheries Technologists (India)Cochin, 2006)The incidence and antibiotic resistance pattern of E. coli and Salmonella from water, beach sand and fish collected from four fish landing centres of Thoothukudi were studied. Presence of £. coli was confirmed in 90%, 92% and 79% of water, beach sand and fish samples respectively, while Salmonella was detected in 25% of water and sand samples and 17% of fish samples. The isolates were tested against fifteen antibiotics by disc diffusion method. While all the E. coh' isolates were resistant to bacitracin, erythromycin and rifampicin, none of the isolates was resistant to ampicillin, chloramphenicol and sulphafurazole. Among Salmonella isolates, all were resistant to bacitracin and most were resistant to ampicillin, colistin, erythromycin and rifampicin. None of the Salmonella isolates was resistant to chloramphenicol, ciprofloxacin and norfloxacin. Multiple antibiotic resistance (MAR) index was higher than 0.2 in all strains of E. coli and Salmonella revealing that they might have originated from high-risk sources of contamination such as humans.