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Studies on shrimp harvesting Techniques In aquaculture (TH 115)

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Relation http://eprints.cmfri.org.in/7168/
 
Title Studies on shrimp harvesting
Techniques
In aquaculture (TH 115)
 
Creator Pravin, P
 
Subject Aquaculture
Theses
Fishery Technology
 
Description Shrimp harvesting techniques playa major role in the efficient
and profitable operation of traditional shrimp farms. It is a labour intensive
operation. However, there is a paucity of information of harvesting
techniques in the traditional sector of shrimp culture in India. Problems are
encountered in harvesting cultured shrimps especially in the farms, which are
not fully drainable. Various harvesting techniques such as sluice net
operation, cast netting, gill netting, complete draining of the farms and hand
picking are deployed at different stages to harvest the shrimp from the farms.
Six seasonal and six perennial farms located at Vypeen Island
(Ernakulam District, Kerala) were selected for the study. Different harvesting
techniques deployed for harvesting shrimps in the traditional shrimp farms,
both seasonal and perennial, were studied in detail with respect to design,
construction details and methods of operation. Sluice nets are the principal
gear system operated in both the seasonal and perennial farms. Harvesting
using other gears such as gill net, cast net and hand picking are done
periodically and also during the final harvest. The Intensity of operation of
different gears and details on the production of shrimp from these fishing
techniques have been worked out separately for seasonal and perennial
farms. The species composition, length statistics, sex ratio and total weight
of different species of shrimps landed in the different harvesting systems
have been discussed. The catching efficiency of gill nets and cast nets, and
selectivity of gill nets have also been studied. Major factors influencing the
efficiency of shrimp harvest from traditional shrimp farms, such as lunar
phases, tide, flow rate of water and intensity of light at sluice gates, have
been investigated in detail. Economic aspects of seasonal and perennial
farms with special emphasis on the harvesting issues have been analysed.
 
Date 2003
 
Type Thesis
NonPeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/7168/1/TH-115.pdf
Pravin, P (2003) Studies on shrimp harvesting Techniques In aquaculture (TH 115). ["eprint_fieldopt_thesis_type_phd" not defined] thesis, Central Institute of Fisheries Education, Versova.