Global Journal of Science Frontier Research: D
Agriculture and Veterinary
Volume 16 Issue 1 Version 1.0 Year 2016
Type : Double Blind Peer Reviewed International Research Journal
Publisher: Global Journals Inc. (USA)
Online ISSN: 2249-4626 | Print ISSN: 0975-5896 | DOI: 10.17406
Large Pelagic Mechanised Gillnet Fishing Systems of Odisha
Coast, India
By P. S. Muhammed Sherief, Saly N. Thomas & Leela Edwin
Central Institute of Fisheries Technology, India
Abstract- Mechanisation brings about major developments in fishing systems. Main fishing gear
operated in Odisha state targeting large pelagics are drift gillnets. Odisha coast is an
ecologically sensitive area having one of the four significant arribada beaches of Olive Ridley
turtle, with three mass nesting beaches. Large mesh drift gillnets are reported to be the main
gear contributing to incidental catch of turtles. The gillnet fishing sector has undergone many
changes during the last few decades in terms of size of craft and gear, area of operation and trip
duration. This paper deals with design and general features of mechanised gillnet fishing system
operated in the coastal waters of Odisha. Presently mechanised gillnetters of 8-19 m LOA with 70
to 140 hp inboard engines go for voyage fishing of up to 30 days. Drift gillnets of the states are
made of Polyamide (PA) and High Density Polyethylene (HDPE) having mesh size ranging from
80-380 mm. Total fleet size of the net increased substantially over the years extending up to 9300
m. Drift gillnets targeting tuna, seerfish, bill fish and shark are operated mainly during night time
in waters up to a depth of 1200 m. In view of the increase in the size of the gear running several
kilometres, there are more chances of turtle kill which calls for monitoring and surveillance.
Keywords: large mesh drift gill net, HDPE, polyamide, large pelagic fishes, odisha.
GJSFR-D Classification : FOR Code: 070107, 070499
LargePelagicMechanisedGillnetFishingSystemsofOdishaCoastIndia
Strictly as per the compliance and regulations of :
© 2016. P. S. Muhammed Sherief, Saly N. Thomas & Leela Edwin. This is a research/review paper, distributed under the terms of
the Creative Commons Attribution-Noncommercial 3.0 Unported License http://creativecommons.org/licenses/by-nc/3.0/),
permitting all non commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Large Pelagic Mechanised Gillnet Fishing
Systems of Odisha Coast, India
Keywords: large mesh drift gill net, HDPE, polyamide,
large pelagic fishes, odisha.
I.
Introduction
G
illnetting is a highly selective fishing gear and
one of the predominant energy efficient fishing
methods spending fuel mainly for propulsion.
Drift netting is a type of gillnetting in which the net is
freely allowed to drift in the sea. Drift nets having fleet
length up to 15000 m are in operation in coastal and
deeper waters of India. Drift gillnet is mainly operated in
high seas to catch large pelagic species like seerfish
tuna, sailfish, sword fish and shark.
The gillnet fisheries of India are considered to
be the mainstay of the artisanal sector, comprising of
small scale localised operation (Thomas, 2010).The
gillnet fisheries of Odisha were the major gears
contributed towards the marine fish landings. Among
the major maritime States of India, Odisha stands 8th in
marine fish production (Kumar and Shivani,
2014).Successful introduction of large pelagic gillnets in
east coast of India was reported by Pajot, (1993).
Scariah et al., (1995), reported marine fisheries of
Odisha and production trends. Chaidee et al. (2007)
Author α σ ρ: Central Institute of Fisheries Technology, P. O. Matsyapuri,
CIFT Junction, Cochin, Kerala, India.
e-mail: sheriefmuhammed@gmail.com
effectively used drift gillnets in marine resource surveys
conducted in Bay of Bengal. Fishing crafts and gears
operated off Orissa reported by (Sivakami and
Kuriakose, 2009). Details of gillnet fishing systems of
Odisha coast were reported by (Edwin et al, 2014). In
the mechanised fishing system of Odisha 35% crafts are
gillnetters (Kumar and Shivani, 2014). Thomas (2005)
reported HDPE as a new material for gillnets along with
nylon multifilament which is used in north east and west
coast of India.
Odisha State has the coastline of 480 km
among the maritime states of India. The continental shelf
up to 200m depth covers an area of 24,000 sq. km,
which is 4.5% of the total area of the country’s
continental shelf. It has 6 coastal districts viz. Ganjam,
Puri, Jagatsinghpur, Kendrapara, Bhadrak and
Balasore. The mechanised sector mostly uses trawl net
and gillnets. As per marine fisheries census conducted
by CMFRI, 2010 a total of 20257 mechanized gillnetters
are operated in the Indian waters. In Odisha coast, there
are 2248 mechanised fishing crafts in Odisha state; of
which781 are gillnetters (Fig.2) (CMFRI, 2010). These
vessels operate, gillnets made of Polyamide (PA) and
HDPE. Probably, Odisha is the only state in the country
to witness an increase in the traditional fishing vessels
along with modern fishing technology during the same
time. Therefore the aim of the study was to document
the design and structural details of mechanised
gillnetters and large mesh gillnets operated in the
Odisha coast.
II. Materials and Methods
The data was collected during January 20122013 from the selected fishing harbour and landing
centres of Odisha using structured questionnaire
covering details of the mechanised gillnet fisheries
sector in Odisha. The details crafts and gears were
recorded according to Fyson (1986), Sree Krishna &
Shenoy (2001), and Thomas & Hridayanathan, (2002).
Design details were depicted as per Nedelec
(1975).Representative samples of fishing vessels were
selected based on the most prevalent designs of the
region and the type of operation. Lines plan and
structural details of most widely used gillnetters were
collected during the survey. The details of the engine
power, fish hold capacity, number of crew, type of
fishing, average fuel consumption etc. were collected.
© 2016 Global Journals Inc. (US)
Year
fishing systems. Main fishing gear operated in Odisha state
targeting large pelagics are drift gillnets. Odisha coast is an
ecologically sensitive area having one of the four significant
arribada beaches of Olive Ridley turtle, with three mass nesting
beaches. Large mesh drift gillnets are reported to be the main
gear contributing to incidental catch of turtles. The gillnet
fishing sector has undergone many changes during the last
few decades in terms of size of craft and gear, area of
operation and trip duration. This paper deals with design and
general features of mechanised gillnet fishing system operated
in the coastal waters of Odisha. Presently mechanised
gillnetters of 8-19 m LOA with 70 to 140 hp inboard engines go
for voyage fishing of up to 30 days. Drift gillnets of the states
are made of Polyamide (PA) and High Density Polyethylene
(HDPE) having mesh size ranging from 80-380 mm. Total fleet
size of the net increased substantially over the years extending
up to 9300 m. Drift gillnets targeting tuna, seerfish, bill fish and
shark are operated mainly during night time in waters up to a
depth of 1200 m. In view of the increase in the size of the gear
running several kilometres, there are more chances of turtle kill
which calls for monitoring and surveillance.
271
Global Journal of Science Frontier Research ( D ) Volume XVI Issue I Version I
Abstract- Mechanisation brings about major developments in
2016
P. S. Muhammed Sherief α, Saly N. Thomas σ & Leela Edwin ρ
Large Pelagic Mechanised Gillnet Fishing Systems of Odisha Coast, India
common large mesh gillnets operated in different
coastal districts viz., details regarding the dimensions,
materials, accessories like floats, sinkers and
operational parameters of the gillnets were also
covered.
Year
2016
The scantling details of different parts such as hull, deck
and wheel house were measured and recorded.
Data on gillnet designs, fabrication, operation
and investment details were collected and recorded.
The structural, operational and design differences in the
Global Journal of Science Frontier Research ( D ) Volume XVI Issue I Version I
28
Fig. 1 : Coastal map of Odisha showing study area
III. Results and Discussion
a) Fishing vessel
The details of gillnetter operating from Odisha
are given in table 1 and the detailed specifications of
large mesh drift gillnets are given in Table 2. The design
of large mesh drift gill net are given in Fig.2-3.
Table 1
Type of gillnetter
Small gillnetters
Medium size gillnetters
Large gillnetters
LOA (m)
Horsepower
8 – 12
13- 18
18-22
70-97
97-110
106-140
The drift gillnets of India which was small-scale
in nature, till early 2000s, showed a clear shift to the
large scale operations, at least in certain pockets of the
country (Thomas, 2010).The change in the fishing
systems
from
subsistence-based
activities
to
commercial operations from simple, low-cost operations
to comparatively hi-tech, high-investment operations.
Earlier the gear is deployed from mechanised boats (10
m) in the inshore waters within 10-15 km from the
foreshore (Pati and Pati,1982). Among the different
types of crafts used in mechanized sector of Odisha,
35% are gillnetters (Kumar and Shivani, 2014).
Total
781
Puri
2
Jagatsinghpur
190
Bhadrak
111
Balasore
478
0
200
400
600
800
1000
Fig.(2) : Distribution of gillnetters along coastal districts in Odisha (Source of data: CMFRI, 2012a)
© 2016 Global Journals Inc. (US)
The LOA of medium size gillnetters range from
13 m to 18 m. Vessels are constructed of either wood or
fibre glass. These types of gillnetters are installed with
Indian made engines with power ranging from 97 to
110hp.Box type of steering systems is used in medium
size trawlers. Diesel is stored in 1-3 tanks, with a total
capacity of 3,000 to 5,000 litres. Ice storage capacity of
this type of vessels ranges from 10-15 m3.Fishing is
normally multiday and it extends from 8 to12 days. The
vessel has a crew complement of 7-10.View of atypical
mechanised gillnetter from Odisha and its profile and
deck layout are given in Fig. 2, 3 and 4.
Year
Previously mechanised Pablo boats ranging 10
to 20 m LOA with drift gillnet is operated for harvesting
large pelagic fishes of Odisha coast (Silas and Pillai,
1985., Pravin et al, 2008). Presently small gillnetters
operating in Odisha have range of 8 m to 12.0 m LOA and
they are constructed of wood. These vessels are fitted
with Indian made engines with engine power in the
range of 70-97hp. Box type of steering are usually used
in these fishing vessels. Electronic equipments such as
GPS and echosounder are used for monitoring the
depth of operation, nature of fishing ground, safety,
navigation and location of fishing grounds. Most of the
vessels are dry docked once in a year. The number of
crew onboard is 4-6 including serang and engine driver.
2016
Large Pelagic Mechanised Gillnet Fishing Systems of Odisha Coast, India
Fig. 2 and 3 : A view of typical mechanised gillnetters operated from Odisha
The size of large gillnetters exceeds 18 m LOA.
Wood and fibre glass are the main construction material
used in this type of vessels and the vessels are well
equipped for multiday deep sea fishing. Large
gillnettersare installed with engines of 106-140hp. The
fish hold with made with wood and fibre and can store
400 kg to 10 tonnes of fish. Generally2-4 diesel tanks
are provided with a total capacity of 3,000-7,000 litres.
The steering used is of box type. Large gillnetters
undertake multiday fishing extending from 10 to 17 days
with crew complement of 8-12 fishermen.
Fig.4 : Profile and deck layout of a typical gillnetter from Odisha
© 2016 Global Journals Inc. (US)
Global Journal of Science Frontier Research ( D ) Volume XVI Issue I Version I
29
1
Year
2016
Large Pelagic Mechanised Gillnet Fishing Systems of Odisha Coast, India
The engine used in Odisha by mechanized is
Indian made marine diesel engines. Large sized
mechanized prefer high power Indian made diesel
engine. Diesel cost forms the major share in the
operational expenditure of the gillnetters. The diesel
consumption per hour varied from 6 to 20 litre h-1,
depending on the size, installed engine horse power
and displacement of the vessel, location of the fishing
ground and duration of the fishing trip.
Almost all mechanized gillnetters in the Odisha
are equipped with modern electronic equipment such as
GPS, echosounder and VHF transceiver. Mobile phones
are also used for shore communication.The wheel
house is constructed on the middle of the main deck
Table. 3 : Investment for gillnetter, gear and accessories
LOA (m)
30
Global Journal of Science Frontier Research ( D ) Volume XVI Issue I Version I
and an awning is provided behind the wheel house.
Even in multiday fishing vessels toilet facilities are not
provided. In medium size and large gillnetters food is
prepared onboard. Berth facilities for crew are provided
in all medium size and large gillnetters.
As the initial investment for a fishing vessel is
high, most of the fishing vessels are of multiple
ownership. Fishing vessels are built by order of the
investor and construction
takes 3-4 months. Total
investment including engine, gear and accessories
range from 1.75 million for small wooden gillnetter (8.712.0m LOA), Rs. 4.6 million for large steel gillnetter
(>16.0m LOA), to Rs. 5.7 million for medium size FRP
gillnetter (12.1- 16.0 m LOA) (Table 3).
8.0-12.0
13.- 18.0
>18.0
Type of
trawler
Horsepower
Wooden
Wood FRP
Wood FRP
07-97
97-110
106- 140
Vessel
15
30
45
Fishing Gear
Polyamide monofilament and multifilament
netting are used for making gill net in Odisha. Large
meshed (100 mm) and very large meshed (150-200mm)
are very common types of gillnets operated along the
b)
Investment, Rs. x 105
Engine
Gear and
accessories
7
12
18
Total
5
5
7
27
47
70
coast (Pillai et al., 2000).Gill nets and lines are used all
along the coast, but have different specifications in the
north and south of Orissa (www.uaaodisha.org).Details
of drift gillnets used for fishing operations from
mechanized gillnetters from Odisha are given Table 4.
Table 4 : Details of drift gillnets operated from Mechanized gillnetters from Odisha
Vernacular name
Mesh sizes,
mm
Fleet
length, m
Depth, m
Target species
Bhetki
Bahaljaal
Phasijalo
Nakundajalo
chandijalo
85
95
100
110
80
10,000
12,000
8000
6,500
1,500
18
16
15
15
15
Hilsa
Pomfrets,Hilsa
Tuna ,sword,dolphin fish
Seerfishes,tunas
Seerfishes
i. Design details Gill nets for large pelagic fishes
Gill nets for seerfishes and tunas are operated
as drifting gear at the surface or in the column waters.
Gillnet is generally held vertically by a buoyant float line
at the top of the net and a lead line at the bottom.
However, the large mesh polyamide (PA) multifilament
twines were used drift gill nets for seerfishes and tunas
operated from the mechanized boat are free of sinker
line or even footrope. These are operated in column or
surface depending on the swimming layer of the fish
during different seasons. At times the float line is rigged
in such a way that it remains below the surface by
adjusting the buoy lines which are attached to the float
line at regular intervals. Drift nets are usually operated
during night-time. Large mesh sized gillnets, meant
mainly for Hilsa and pomfrets, are used in the northern
side of Odisha coast (Edwin, 2014).
PA monofilament and multifilament twines were
used throughout the Odisha coast for Hilsa, seerfish and
tuna gill nets. Coloured multifilament yarns were used as
© 2016 Global Journals Inc. (US)
netting material throughout the coast.Green and red
colours were commonly used. Yarn having specification
of 210d×2×3 to 210d×12×3 were most commonly
used according to the mesh size. PA monofilament of
mesh size 0.50 to 1 mm diameter and selvedge meshes
of PE of 1 to 4 mm diameter is used gillnets for shark.
During December-January months, when comparatively
larger specimens of seerfish occurred in the fishery, PA
2l0dx9x3 (Rtex 683) and 2l0dxl2x3 (Rtex 911) were used.
The use of 210d ×2×3, 2l0dx4x3 and 2l0dxl2x3 was
observed at different coastal belts of Odisha. The mesh
size ranged between 90 and 200 mm, however the most
common are 90 and 160 mm. The fleet lengths of net
ranged between 3900-9300m. PA multifilament twines
were used throughout the coast for seer fish and tuna
nets. The operation of large mesh drift gill nets, for high
sea pelagic species is at 100-1200 m depth zones. The
hanging coefficient of the gear varied between 0.45 and
0.6 in different regions. The net is free of footrope or
sinkers for effective entangling. The hung depth of the
c) Operational details
Mechanised vessels operating from Odisha
operated deeper than their motorized counterparts. The
depth of operation of mechanized crafts ranged
between 100 and 1000 m and similar observations were
reported by Akhilesh et al. (2012). Previously the
operations of large mesh gillnets were limited to 100 m
depth (Thomas, 2001). Larger vessels, with higher
engine power and ice storage facilityconducted
operations in distant and deeper waters.The drift gillnets
are operated by fishermen from inboard engine fitted
vessels with of 12-18 m LOA and having navigational and
fish finding electronic
instruments like GPS,
Echosounder and VHF transceivers are used for
navigation and fishing in the high seas of Odisha .
During operation nets were freely allowed to
drift along with the boat for 4-6 h during night time and
one end of the net is tied to the vessel after shooting the
net. Hauling is done manually. Indicator flag lights are
attached to the two ends of the net during night
operation. It helps fishermen to avoid heavy losses
because their nets are damaged or cut loose by passing
ships or other larger vessels (Pajot, 1980). After hauling
the net, the catch is sorted species wise. In late 1990’s
one to two weeks multi voyage fishing started for gillnet
fishing (Thomas, 2001). Now this trip duration is
increased changed and they are going for 20-30 day
long trip to for high sea fishing in Odisha coast.
Year
nets ranged from 10 to 18 m. Regional variations exists
in hung depth of the gear.
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Large Pelagic Mechanised Gillnet Fishing Systems of Odisha Coast, India
Global Journal of Science Frontier Research ( D ) Volume XVI Issue I Version I
311
Fig. 5 : Design of a typical of a typical HDPE drift gillnet operated in Odisha
© 2016 Global Journals Inc. (US)
Year
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Large Pelagic Mechanised Gillnet Fishing Systems of Odisha Coast, India
Global Journal of Science Frontier Research ( D ) Volume XVI Issue I Version I
32
Fig. 6 : Design detail of typical PA multifilament drift gillnet operated in Odisha
d) Species composition
The main targeted species are tuna Euthynnus
affinis, seerfish (Scomberomorouscommerson andS.
guttatus), Rays (Himantura bleekeri, H.uarnak)and shark
(Carcharinus sorrah and Sphyrna lewini) and billfish
Istiophorousplatypeterus,
Barracudas,Sphyraena
barracudaand other fishes like
Ilisha elongata,
Epinephelus chlorostigma, Pampus argentus, P.
chinensis,
Tenualos
ailisha,
Eleutheronema
© 2016 Global Journals Inc. (US)
tetradactylum. Studies with the large mesh gillnets
showed that, it is the effective fishing method for
exploiting large pelagic fish species found in the high
seas, which are not being caught by other fishing gears
(Pravin et al., 2002). The main fishing season was from
January to Marchand peak catch was observed during
January.Pati and pati (1982), reported drift gillnets are
the principal gear used in the coastal waters of Odish to
catch hilsa, pomfrets, seerfish, marine catfishes, silver-
IV. Acknowledgment
The authors gratefully acknowledge the support
from the National Agricultural Science Fund (NASF), for
funding this study. They also thank Dr. C. N
Ravishankar, Director, CIFT for the facilities provided
and for his kind encouragement and guidance during
the course of the study. Help and technical assistance
from shri.V.Pradhan, Technical staff, of CIFT greatly
acknowledged.
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Global Journal of Science Frontier Research ( D ) Volume XVI Issue I Version I
bars and sharks and minor quantity of horse mackerel,
long-finned herring, shad, Indian salmon, serranids and
sciaenids
Polyamide multifilament is widely used for the
fabrication of gillnets in India, which is gradually being
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2002). Even though motorization of country crafts took
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Clearly, the marine fisheries sector in Odisha
deserves a special research attention for several
reasons. First, it is a sector that provides employment to
a large number of people, even if at a subsistence level.
Second, the sector has witnessed a remarkable growth
that need to be explained further. Thirdly, the sector has
witnessed a remarkable technological advancement
although substantial sections of the people drawing a
living from it are still doing that with traditional and nonmechanised methods of capture. It is in this context that
we seek to observe the labour market outcomes in the
sector in Odisha. The information on design, structural
parameters and operation of mechanised gillnetter and
large mesh pelagic drift gillnets would serve as baseline
data which would help future study.
2016
Large Pelagic Mechanised Gillnet Fishing Systems of Odisha Coast, India
Year
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Large Pelagic Mechanised Gillnet Fishing Systems of Odisha Coast, India
Global Journal of Science Frontier Research ( D ) Volume XVI Issue I Version I
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