356 research outputs found
Landing of Neophocaena phocaenoides at Rameswaram
Porpoise along Palk Bay coast and Mandapam. Report gives details of morphometric characters of Neophocaena phocaenoides
Landings of porpoise,Neophocaena phocaenoides at Rameswaram.
Paper is reporting the morphometric measurements of female porpoise, Neophocaena phocaenoides caught by gill net, operated off Rameswaram at a depth of 16m
Current Status of Crab Fishery in the Artisanal Sector along Gulf of Mannar and Palk bay Coasts
Among the exploited crustacean fishery resources, portunid crabs constitute a significant proportion in the landings along both the east and west coasts of India. From 4% in 1966 the composition of crabs gradually increased and reached 12% in 2006 showing an upward trend from year
to year (Rao et al., 1973; Manissery and Radhakrishnan, 2003). This steady increase in the landings of crabs is mainly attributed to the intensification of fishing operation using different types of modern gears
and also due to the exploration of new fishing grounds in deeper waters targeting crabs in order to meet the ever increasing demand for the processed crab meats in the domestic as well as in the international markets
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Need to regulate the thalluvalai fishery along Palk Bay, southeast coast of India
Along the coast of Palk Bay the juveniles of the green tiger prawn Penaeus semisulcatus are indiscriminately exploited from the nursery ground by the artisanal gear thalluvalai round-the-year except during the 45-day ban period. Studies on the thalluvalai fishery from one of the fishing villages namely, Thirupalaikudi was carried out during the years 2006-08. The fishing ground where the
net is operated comprise mostly of seagrass and seaweed beds, dominated by the seagrass Cymodocea serrulata, serving as a potential nursery ground for the juveniles of P. semisulcatus. The estimated monthly landings of P. semisulcatus by thalluvalai at Thirupalaikudi landing centre fluctuated with an average of 3.4 t, the maximum of 10.0 t observed in March 2007. It was found that a large number of females constituting a significant proportion were exploited before the first spawning. The total
number of immature females was estimated at 3.9 million constituting on an average 85.4% of the total number of females landed by thalluvalai. Juvenile females measuring less than 100 mm in total length contributed 39.1% of the total landings of females. The size composition of P. semisulcatus landed by thalluvalai was compared with that landed by trawlers and gillnets operated in the Palk Bay
Electrophysiological responses of banana pseudostem weevil, Odoiporus longicollis Olivier (Coleoptera: Curculionidae) to methyl jasmonate, 1-hexanol and host plant extract
53-57The banana pseudostem weevil (BSW), Odoiporus longicollis Olivier (Coleoptera: Curculionidae) is one of the most destructive pests of banana and plantains. Our laboratory bioassay studies showed that out of 50 host plants related volatile chemicals screened against BSW, only methyl jasmonate (MeJA) and 1-hexanol was electrophysiologically and behaviourally active. Here, we investigated the influence of host plant extract (HPE) on two semiochemicals, namely methyl jasmonate (MeJA) and 1-hexanol, both independently and in combination, in the electroantennogram (EAG) response in BSW. The results showed that HPE alone elicited greater EAG response only in males suggesting that males involved predominantly in the host plant selection. Addition of HPE to MeJA increased significantly higher EAG response in females and the response was insignificant in males. Similarly, the addition of HPE to 1-hexanol evoked higher response in females but decreased antennal activity was recorded in males compared to HPE alone. The HPE showed additive effect on MeJA and 1-hexanol in their EAG responses only in female BSW. The result also revealed that 1-hexanol+HPE blend exhibited enhanced EAG response compared to 1-hexanol alone in both sexes
Assessment of Farm Financial Literacy among Jasmine Growers in Tamilnadu, India
The unique nature of farm financial management calls for farmer to act as an entrepreneur. Being an farm entrepreneur the farmer should have enough financial literacy for effective financial management. Apart from training on production, post-harvest and marketing NAIP had given some information on farm financial management. A study was conducted to assess the financial literacy of jasmine farmers. Standardized knowledge test was employed to assess the financial literacy of farmers. For that, 100 farmers from Erode and 100 famers from Madurai district was surveyed. The collected data were analyzed using percentage analysis, multiple regression and factor analysis. It was concluded that, Erode farmers has high financial literacy than Madurai farmers. The results revealed that, age, education, experience, farm income, years of relationship with the bank, size of landholding, frequency of bank visit and bank account were significantly influenced the financial literacy of farmer. Key words: Financial literacy, NAIP, knowledge test and factor analysi
An unusual bumber catch of white prawn, Penaeus indicus from Kovalam bay near Madras
In the history of the fishing village, namely, Kovalam (lat. 12┬░47'N long. 80┬░15'E), formerly known as Covelong, situated 35 km south of Madras City, heavy landings of the Indian white prawn, Penaeus indicus caught with gill net have occurred for the firsi time during 16th-20th December, 1984. Recent mark-recapture experiments on P. indicus have also established the fact that a longer migration of tagged white prawns took place from Cochin, (place of release) to Ovari - Manappad fishing villages on the southeast coast (Tinnaveli coast), covering a distance of 330-380 km in 68 to 103 days at a rate of 3.5 to 5.5 km/day. The southward migration of white prawns during the present study was in conjunction with the prevailing southerly current along the coast
Effect of lower salinities on growth and survival of early juveniles of the King prawn Penaeus latisulcatus Kishinouye under laboratory conditions
Early juveniles of the King prawn Penaeus latisukalus reared in 34.12 ppt tolerated lower salinities
of 10 to 25 ppt without acclimatisation, whereas cent percent mortality was recorded in 0 ppt and 40% in
5 ppt. In the case of prawns acclimatised to salinities on 5, 10, 15, 20 and 25 ppt, the percentage of survival
during one month rearing was 6.7, 40.0, 73.3, 93.3 and 86.7 respectively. In terms of growth per month,
the prawns reared in 15-25 ppt salinities recorded a higher growth of 7.7 to 9.5 mm as against 4.1 to 5.7
mm in 5-10 ppt. The significance of these experimental results in the context of farming of this species is
briefly discussed
The induced maturation and larval rearing of the King prawn Penaeus latisulcatus Kishinouye under controlled conditions
The King prawn Penaeus latisulcatus Kishinouye, one of the large-sized penaeid prawns are seen in Indian coastal backwaters. Reports shows some captive controlled rearing of these prawns in Japan and China. An experimental work was conducted on induced maturation by eye stalk ablation and larval production at Kovalam laboratory, Madras. This is the first time in India that an experiment conducted on the maturation and larval production of Penaeus latisulcatus under controlled conditions has yielded fruitful results
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