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Title Impact of operational parameters on drag of trawl nets
 
Names Sayana, K.A.
Remesan, M.P.
Edwin, L.
Date Issued 2018 (iso8601)
Abstract Many of the world’s fisheries are facing multiple
challenges in the form of over capacity, resource
depletion and high investment, while rising fuel
prices is worsening the situation. Trawls are the
most energy intensive fishing systems consuming
more fuel than purse seining, long lining and
gillnetting (Gulbrandsen, 1986; Tyedmers et al.,
2005; Muir, 2015; Parker & Tyedmers, 2015; Parker
et al., 2015). Hence maximum scope for fuel
conservation among fishing sector exists in trawling.
During calm weather, large quantity of fuel is used
to overcome the trawl drag compared to that used
for vessel propulsion in trawlers. In trawling
operation, a sizeable time is also spent for towing
the gear and 10-20% fuel consumed is spent to
overcome the resistance (drag) during towing time
(Montgomerie, 2009). Hence it is understood that
gear has a large effect on fuel consumption during
towing because drag due to vessel is insignificant
at the time of towing when compared to drag due
to gear (Boopendranath, 2002) and a reduction in
drag can lead to a substantial reduction in fuel
consumption. Studies on drag and its influencing
factors will be helpful to those who are associated
with designing of trawl to effectively accommodate
the design and operational parameters for fuel
conservation. Impact of towing speed on drag and
fuel consumption of trawlers have been studied by
Priour (1999), Curtis et al. (2006), Khaled & Priour
(2010), Sala et al. (2011), Khaled et al. (2013) and
Balash & Sterling (2012). The present study was
conducted to assess the impact of operational
parameters on drag of trawl nets.
Genre Article
Identifier Fishery Technology 55(4):295-297