FT Vol.44(1)
Permanent URI for this collection
Browse
Recent Submissions
1 - 5 of 12
- ItemToxicity Evaluation of Treated Refinery Effluent using brine Shrimp (Artemia salina) Egg and Larval Bioassay(Society of Fisheries Technologists (India)Cochin, 2007)A bioassay test using Artemia Salina egg and larvae is conducted to evaluate the aquatic toxicity treated refinery effluents. The brine shrimp (Artemia salina) has gained popularity as test organism for short-term toxicity testing because of its ease of culture, short generation time, cosmopolitan distribution and its commercial availability as dormant eggs. One year study has been carried out to assess toxicity of effluent samples collected from an oil refinery at Mangalore, (India) on the egg hatching and larval survival rate of A. salina. The chemical quality of the refinery effluent collected during Oct 2002 - Sep 2003 was found to be within the prescribed permissible limits. The mean EC50 for egg hatching rate using the effluent collected during the dry and wet seasons was 40.6% and 73.4% effluent (% by volume) respectively. The mean LC50 value for larval mortality using the effluent samples collected during the dry and wet seasons was 37.2% and 48% effluent respectively. The mean No Observed Effect Concentration (NOEC) for the effluent in the present study was 6.3%. The reported natural dilution available in the Arabian Sea near the marine outfall of the refinery is sufficient enough to dilute the effluent below the observed NOEC.
- ItemStudies on Long- Term Storage of Sperm of a Marine Ornamental Fish, Istiblennius edentulus (Perciformes: Blennidae(Society of Fisheries Technologists (India)Cochin, 2007)Detailed study was conducted on the effect of cryopreservation on spermatozoa of a marine ornamental fish of the family Blennidae. The long-term preservation of spermatozoa of Istiblennius edentulus was conducted with 5 different extenders in combination with 5%, 7.5% and 10% concentrations of DMSO, Methanol and Glycerol as cryoprotectants. The best post thaw motility was observed with Alsever's solution as extender and 5% Glycerol as cryoprotectant (88.12%motility and 89.19% viability).
- ItemStatus of Bottom Trawl Fishery In Kerala (South India)(Society of Fisheries Technologists (India)Cochin, 2007)The total number of bottom trawlers operated from 11 harbours in Kerala comprising 6 major and 5 minor harbours were enumerated during August 2000 to July 2001. A total of 4960 bottomtrawlers were found to operate during the study period. On an average, 1542 trawlers were landed per day in Aug-2000 while it was only 738 in Nov-00 being the lowest. 40-50'LOA size class vessels (38%) dominated among the trawlers operated in Kerala followed by 31-40' (30%). Total bottom trawl landings were quantified as 2,46,116 tonnes that accounts for 46% of the total marine fish landings and 87% under total mechanised sector during 2000-01. The annual average CPUE was estimated to be 891kg with a catch/hr of 53 kg. Highest share of the trawl landings was reckoned from 21-40 m depth contributing to 24.5% while highest CPUE from bottom trawl net was also recorded from the same depth
- ItemSensory, Microbiological and Biochemical Quality of black pomfrets (Pampus niger) stored in dry ice and ice(Society of Fisheries Technologists (India)Cochin, 2007)The sensory, microbiological and biochemical quality of black pomfrets (Pampus niger) stored in different ice packages was investigated. Pomfrets packed in dry ice at the ratio of 1:1 (w/w) were found to be sensorialy suitable for consumption when they were stored for 24 h without re-icing. Pomfrets stored in a combination of dry ice and ice at the ratio of 1:0.2:0.5 (w/w/w) and in ice at the ratio of 1:1 (w/w) (as control) were acceptable up to 18 h and 12 h, respectively. Total bacterial load ranged from 104 to 107 cfu/g, while total psychrophiles from 103 to 106 cfu/g. Total lactic acid bacteria varied from 103 to 105 cfu/g. TVB-N and TMA-N contents were within the permissible limit in pomfrets stored in dry ice. Hypoxanthine (Hx) contents ranged from 3.46 to 8.96 mg/lOOg and FFA content varied from 10.35 to 54.34% as oleic acid. Lowest temperature of -110C was recorded in pomfrets stored in dry ice. Packages I and II had 100% C02 inside after one hour of storage
- ItemFactors Responsible For Discriminating Between High and Low Adopter Categories of Shrimp Farmers(Society of Fisheries Technologists (India)Cochin, 2007)Shrimp farming on a commercial scale has come to be the main stay, of the coastal economy of the country. Scientific Shrimp farming is characterised by the adoption of improved technologies for getting a better yield both in terms of quantity and quality. Adoption of improved technologies is dependent upon a host of factors such as the perceived attributes of the technology, the cost of the technologies and the policy environment in which the technologies are adopted. Among these factors, certain factors help to discriminate between high and low adoption categories. These are vital from the point of view of technology development and refinement. In this study 60 shrimp farmers of Nellore district of Andhra Pradesh were studied for identifying the factors responsible for discriminating the high and low adoption categories of shrimp farmers. The findings revealed that, the variables such as attributes of shrimp culture technologies such as efficiency and feasibility of technologies had substantial importance in the classification of shrimp farmers into high adopter category and low adopter category. Further, it was observed that of the 60 shrimp farmers studied, 31 belonged to high adopter category and 29 belonged to the low adopter category.