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Assessment of low value bycatch and its application for management of trawl fisheries

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Relation http://eprints.cmfri.org.in/10249/
 
Title Assessment of low value bycatch and
its application for management of trawl
fisheries
 
Creator Dineshbabu, A P
Thomas, Sujitha
Vivekanandan, E
 
Subject Fisheries Management
Marine Fisheries
 
Description The estimated annual average catch by trawlers operating from
Mangalore Fisheries Harbour (southwest coast of India) was
124,105 tonnes during 2008-2011. Of the total catch, 63.9% was
landed as high-value catch (HVC) for human consumption, 14.7%
as low-value bycatch (LVB), and 11.4% was discarded at sea.
However, during the four years, the contribution of LVB to the
trawl catch substantially increased from 2.5% to 24.6%; and the
discards reduced from 18.1% to 5.9%. As demand for raw material
from fish meal plants is increasing, trawlers are encouraged to
target LVB. Trawl bycatch consisted of 205 species/groups, of
which 147 were finfishes, 4 bivalves, 7 cephalopods, 21 crabs, 3
stomatopods, 3 lobsters and several miscellaneous groups. About
34% of the LVB by weight and 63% by number were juveniles of
45 commercially important species. Mapping spatio-temporal
abundances of juveniles of four important demersal fish species
showed that the distributions of juveniles occurred along vast
coastal stretches for several months in a year. Exploitation of large
quantities of juvenile and sub-adult fishes potentially contributes to
growth overfishing, reduced economic returns to fisheries and loss
of biodiversity; and therefore threatens the sustainable exploitation
of resources. A few potential management options such as the use
of bycatch reduction devices, spatial and temporal closures to
trawling and fisheries refugia are discussed. Assessing the net
economic value of benefits and losses due to LVB is required to
achieve sustainable management of trawl fisheries.
 
Publisher Marine Biological Association of India
 
Date 2014
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/10249/1/AP_Dineshbabu_JMBAI_56_2.pdf
Dineshbabu, A P and Thomas, Sujitha and Vivekanandan, E (2014) Assessment of low value bycatch and its application for management of trawl fisheries. Journal of the Marine Biological Association of India, 56 (1). pp. 103-108.