818 research outputs found
Heavy landings of yellowfin tuna Thunnus albacares (Bonnaterre, 1788) by hooks and line off Chennai coast
Tunas are commercially important fish and
widely but sparsely distributed throughout the oceans
of the world, generally in tropical and temperate
waters. They are grouped taxonomically in the family
Scombridae, which includes about 50 species. The
most important of these in commercial and
recreational fisheries are yellowfin (Thunnus
albacares) (Fig. 1), skipjack (Katsuwonus pelamis),
bluefin tuna (T. tonggol), frigate tuna (Auxis thazard)
mackerel tuna (Euthynnus affinis) and striped bonito
(T. orientalis). They are exploited mainly by hooks
and line, mechanised gillnets and trawlnets in India
Heavy landing of juvenile seerfish Scomberomorus commerson (Lacepede, 1800) along Chennai coast
After the fishing ban (15th April - 30th May, 2011),
heavy landings of juvenile seerfish Scomberomorus
commerson (Lacepede, 1800) was observed along
Chennai coast. During the period from April to August
2011, young ones of S. commerson were landed
continuously by gillnet (Pannuvalai). The nets were
operated near the shore in 5-10 m depth. The average
catch per boat was 15-50 kg dail
рдмрдВрдЧрд╛рд▓ рдХреА рдЦрд╛рдбреА рдореЗрдВ рдЪреЗрдиреНрдирдИ рддрдЯ рдкрд░ рдкреЛрдореНрдкрд╛рдиреЛ рдбреЛрд▓реНрдлрд┐рди, рдХреЛрд░рд┐рдлрд╛рдЗрдирд╛ рдЗрдХреНрд╡рд┐рд╕реЗрд▓рд┐рд╕ (рд▓рд┐рдиреНрдирд╕, 1758) рдХреА рдкрд╣рд▓реА рд░рд┐рдХреЛрд░реНрдб
рдХреГрдкрдпрд╛ рдкреВрд░рд╛ рд▓реЗрдЦрд╛ рдкрдв
First record of pompano dolphinfish, Coryphaena equiselis (Linnaeus, 1758) off Chennai coast in Bay of Bengal
On 5.9.2009, a catch comprising 15 specimens
of pompano dolphinfish, Coryphaena equiselis
(Linnaeus, 1758) was landed at Chennai Fisheries
Harbour by mechanised gillnet. The mechanised
gillnets operated usually at a depth between 30 and
50 m at a distance of 30-40 km north of Chennai
towards Andhra Pradesh. Since, trawlnets and
mechanised gillnets are the main fishing gears
operated off Chennai coast, fishes belonging to the
family Coryphaenidae formed part of regular
landings by these two gears. Normally common
dolphinfish, Coryphaena hippurus formed regular
fishery along this coast
рдЪреЗрдиреНрдирдИ рддрдЯ рдореЗрдВ рдХрд╛рдБрдЯрд╛ рдбреЛрд░рд┐рдпреЛрдВ рджреНрд╡рд╛рд░рд╛ рдкреАрдд рдкрдЦ рдЯреВрдпреВрдирд╛ рдердиреНрдирд╕ рдЕрд▓реНрдмрд╛рдХрд╛рд░реЗрд╕ (рдмреЛрдиреНрдирд╛рдЯреЗрд░реЗ, 1788) рдХрд╛ рднрд╛рд░реА рдЕрд╡рд░рдг
рдХреГрдкрдпрд╛ рдкреВрд░рд╛ рд▓реЗрдЦрд╛ рдкрдв
Occurrence of a rare species of red crab, Ranina ranina (Linnaeus 1758) along Chennai coast
The red frog crab otherwise called spanner crab
is a coastal water species and single representative
of genus Ranina under family Raninidea. They prefer
to inhabit in bare sandy areas of intertidal and
coastal waters of more than 100m depth. Distribution
of this crab is confined to tropical and sub topical
coastal waters of Indian and Pacific oceans, from
the coast of South Africa to Hawaii and the Great
Barrier Reef. Occurrence of this species is very sparse
in Indian waters and has been recorded once in Gulf
of Mannar (Kasinathan et al., 2007)
Rare occurrence of deepsea snake mackerel off Nagapattinam coast in the Bay of Bengal
Lepidocybium flavobrunneum (Smith, 1843) has
a wide distribution in tropical and temperate seas of
the world. The species is considered to be
benthopelagic in occurrence between 200 and
1000 m, depth, and probably not reported to occur
in the northern Indian Ocean. Balasubramanian
(2007) reported on the occurrence of this species
during 2004-06 in the landings of large meshed
gillnets operated off Tuticorin coast in the Gulf of
Mannar. A catch of 4 specimens of Lepidocybium
flavobrunneum (Fig. 1) belonging to the family
Gempylidae (snake mackerels) were observed at
Chennai Fisheries Harbour on 5.3.2009
Installation of fishing net tracking buoys in deep sea multiday tuna drift gillnetters at Chennai
The deep sea multiday tuna drift gillnetters face
many risks while they engage in fishing. The cutting
and stealing of nets by fishermen of other boats
or damage of the nets by the ships is common. As
the total length of a net when set is around 5 to 6
nautical miles (nmi) and the fishing is carried out
during night, quite often the fishermen come to
know about the loss only at the time of hauling
the net. Another serious issue is the possibility of
collision with an approaching ship as sometimes
the fishing ground can be on the same track of a
ship and fishermen notice it only when the ship is
too near to them. Installation of fishing net tracking
buoy can effectively avoid these risks and enable a
hassle free fishing trip
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