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Exploratory fishing by oceanic drift gillnetting and purse seining in the Lakshadweep

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Relation http://eprints.cmfri.org.in/2501/
 
Title Exploratory fishing by oceanic drift gillnetting and purse seining in the Lakshadweep
 
Creator Silas, E G
Pillai, P P
 
Subject Marine Fishing
Tuna fisheries
 
Description With a view to develop the oceanic pelagic fisheries,
it was planned as early as 1965 to conduct exploratory
fishing in the offshore and oceanic areas by drift
gillnetting and purse seining. During the cruises of
R. V. Varuna it was possible to plan out the operation
of drift gillnet fishing which was started in January
1965 and continued as and when possible upto the end
of January 1968. Purse seining for tunas was also
conducted by R. V. Varuna and M. V. Tuna of the erstwhile
Indo-Norwegian Project. Although during the
cruises scouting for tuna was conducted by sonar
(ASDIC) (horizontal range 1500 m) and echosounders,
it was found that visual scouting was more effective.
The characteristic sonic spires in the Deep scattering
layer between 300 and 450 metre were observed and it is
presumed that these could be due to the presence of
larger tunas such as bigeye and possibly billfishes at
that depth. A brief summary of the results of the
operations has been presented earlier (Silas 1969).
 
Publisher CMFRI
 
Contributor Silas, E G
 
Date 1985
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/2501/2/Article_20.pdf
Silas, E G and Pillai, P P (1985) Exploratory fishing by oceanic drift gillnetting and purse seining in the Lakshadweep. CMFRI Bulletin, 36. pp. 165-175.