51 research outputs found
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No full textNot AvailableMini-trawls are operated by the artisanal fishermen from small wooden non-motorised canoes. Shrimp, fish and crab trawls with head rope length ranging from 3.5-8 m, made of Polyethylene monofilament (PE) twisted and Polyamide multifilament (PA) rigged to 6-7 kg flat rectangular wooden otter boards are common in the lower reaches of Kariangode and Chandragiri rivers. Since the trawling speed is less, catch is dominated by crustaceans. Less scope ratio also may be affecting the catching efficiency of the gear. This paper deals with the design, operation and economics of mini trawling carried out by a group of fishermen in the above rivers of Kasargod district, Kerala state.Not Availabl
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No full textNot AvailableResult of the study on traditional traps in the inland waters of three northern districts viz, Kasargod, Kannur and Kozhikode in Kerala state during 2003-2004 is presented. Mainly six types of traps are found in operation. Chempally koode is a rectangular bamboo trap with "D" shape in cross section operated without bait in some rivers of Kannur and Kasargod. Bamboo screen barriers are almost completely replaced with durable HDPE net screen to make handling easy. Thottil vala is a unique aerial trap operated from the dam in Pazhassi reservoir during monsoon to catch big fishes jumping against flowing water. Therakkal using filler trap is a primitive fishing method seen in the backwaters of Kuppam river. Due to the scarcity of resources and profileration of other gears operation of fish traps has declined. The design, fabrication, mode of operation and economics of important traps used in the region are discussed along with conservation aspects.Not Availabl
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No full textNot AvailableResults of the study on fishing gear conducted along the inland waters of Kozhikode, Kannur and Kasargod districts of North Kerala during 2003-2004 are reported. The salient features and operational aspects of different types of gill nets in operation are discussed. Most of the gill nets were found to be fabricated with polymide (PA) monofilament of 0.16 mm dia. Gill nets for fish, prawn and crab with mesh size ranging from 12 mm to 220 mm were in use. Trammel nets made of PA mono and multifilament were in operation in some places.Not Availabl
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No full textNot AvailableCodend selectivity of Thryssa dussumieri, an important trawl resource along Gujarat coast was studied using covered codend method. The selectivity estimates were worked out for 40 mm diamond and square mesh codends by staked haul method to account variation associated with multiple hauls considered for deriving the selectivity. The length at 50% retention of the species for the 40 mm diamond and square mesh codends were worked out as 8.84±0.16 and 10.20±0.12 cm respectively. The selection range, selection factor and selection ratio for the diamond mesh codend was 7.96±0.42 cm, 2.21 and 0.9 respectively and for the 40 mm square mesh codend these values were 3.76±0.19 cm, 2.55 and 0.37 respectively. Considering the length at first maturity of the species as 125 mm, the optimum mesh size for 40 mm diamond mesh and square mesh codend were worked out as 56.6 and 49 mm respectively for conservation of the species.Not Availabl
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No full textNot AvailableEconomic viability or economic
efficiency is equally an important aspect in fishing
industry in addition to technical efficiency. Even if a
fishing unit is technically efficient but economically
not viable, it is not considered suitable for long
running. Reduction in fleet size of mechanised
trawlers since 2000 might be associated with the
decreased economic viability of trawl units which
would be resulted in termination of the units. An
estimation of capital investment and annual
expenditure, details of elements of each type of cost
and a comparison of all these among different size
category are the results described. Role of fuel cost in
operational cost is also portrayed.Through the study, it
is proved that capital cost and other annual
expenditure are in linear relationship with the size of
trawler. The capital investment of mechanised
trawlers in Kerala found to be ranged from 0.45 to
13.74 million rupees depending on the size.
Comparing the components of capital investment of
wooden and steel trawlers, cost of vessel is the major
contributor in steel vessels but in wooden trawlers, it
is contributing less compared to trawl nets and
accessories. Annual fixed cost of mechanised trawlers
in Kerala ranged from 0.3 to 2.5 million rupees. It is
higher in large and very large trawlers and decreasing
with respect to size of the trawler. The contribution of
trawlers towards insurance found to be negligible as
Matsyafed is giving insurance to fishing vessels at a
very low cost ranging from 250 to 350 rupees.
Operational cost, which is the most significant
economic factor in case of trawlers found to
increasing with size of trawlers depending on the rate
of fuel consumption. Annual operational cost of
trawlers in Kerala ranged from 1.21 to 14.52 million
rupees during the study period. Among the
components of operational cost, fuel cost found to be
major contributor followed by fishermen share, repair
and maintenance cost and other remaining costs.
Operational cost found to be the major contributor in
total annual cost of mechanised trawlers contributing
73 to 85% depending on their size.Not Availabl
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