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Fleet optimization of trawl fishery along southwest coast of India using surplus production model

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Title Fleet optimization of trawl fishery along
southwest coast of India using surplus
production model
Not Available
 
Creator Zacharia,P U
Sathianandan,T V
Najmudeen,T M
 
Subject Catch per hour
Genetic algorithm
MSY
Surplus
production model
Trawl fishery
 
Description Not Available
The impact of trawl fisheries on the multi-species fishery
resources, along the southwest coast of India, was studied by
applying surplus production model and genetic algorithm
approach using 23 years of time series data on catch and fishing
effort during the period 1990-2012. The annual trawl landings
varied from 0.282 million tonnes (t) in 1990 to 0.570 million t
in 2012 with average annual landing of 0.357 million t. Though
the effort in number of fishing units has been reduced from
0.756 million units in 1990 to 0.408 million in 2012, the effort
in actual fishing hours has increased substantially (142%) during
the last two decades. The catch rate of high value groups such
as large pelagics, penaeid prawns and cephalopods have
gradually declined whereas low value groups such as small
pelagics and miscellaneous groups have been caught in higher
rate. The average biomass, yield, fishing mortality and fishing
effort of the resources harvested by trawlers during the last
three years were compared with the maximum sustainable yield
(MSY), biomass at MSY level (BMSY), fishing mortality at MSY
level (FMSY) and fishing effort corresponding to MSY (fMSY),
which are estimated using genetic algorithm approach based on
Schaefer’s non-linear surplus production model. Assuming the
last three years fishing effort as the current level of effort, the
optimum level of exploitation was found marginally lower (99%)
than the current level of exploitation to keep the annual average
yields just below MSY.
Not Available
 
Date 2021-09-17T04:07:12Z
2021-09-17T04:07:12Z
2014
 
Type Article
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/63516
 
Language English
 
Relation Not Available
 
Publisher Marine Biological Association of India