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Researcher Selva, Muthu Kumaran P.
Advisor Antony, Cheryl
Source KrishiKosh-Indian National Agricultural Research System
Content type Text
Educational Degree Master of Science (M.Sc.)
Publisher Fisheries College and Research Institute
File Format PDF
Language English
Subject Domain (in DDC) Technology ♦ Chemical engineering ♦ Food technology
Subject Keyword Fish Processing Technology ♦ Longline Selectivity Studies On Seer Fishes of Thoothukudi Coast
Abstract A study was carried out on longline selectivity on seer fishery of Thoothukudi Coast, Tamilnadu on the basis of fishing pressure and length at first maturity. Data for the present study were collected twice a week. Scombrid fishes form good fishery in Thoothukudi coast. Only S.commerson was recorded from the longline catches during the period of study from June 2007 to May 2008. Data on species composition, catch and effort were recorded. Fishing pressure on the different length groups were estimated. Seasonal variations in the length composition of seer fishes were studied using FiSAT package (Fish stock Assessment Tool of FAO/ICLARM). The hook sizes for the commercial exploitation of seer fishes were standardized. The study showed that S. commerson only formed commercial fishery round the year. The peak season of this fishery was observed from June to August. The fishermen used three different sizes of Mustad ‘J’ hook numbering 7,8 and 9.for capturing seer fishes along Thoothukudi coast. In commercial fishery of S. commerson the hook No 9 may be discouraged since it was observed to capture more under sized fishes. The ideal hook for commercial catching of S. commerson were found to be number 7 and 8. Regarding baits, scad, sardine and squid tentacles or mantles, were observed to be used for capturing seer fishes. Among the baits used the squid recorded a higher catch rate. The baits attaching method to the hooks were found to be correct. The longline units operated by the fishermen did not have the components like sekiyama, swivel and snood wire. Therefore, the study suggests the need of improving gear design by adding the basic components to the long line units for improving the catching efficiency.
Educational Use Research
Education Level UG and PG
Learning Resource Type Thesis
Publisher Place Tamil Nadu ♦ Thoothukudi
Owner Rathnakumar, K. ♦ Sundaramoorthy, B.
Size (in Bytes) 567.53 kB