748 research outputs found
Gill net fishery off Veraval during 1982-1990
The fishery resources off Veraval are exploited intensively mainly by two gears, viz., trawl and gill nets. The gill net fishery has undergone changes by way of introduction of many out-board motorised canoes. Two types of crafts, wooden and FRP dugout canoes (with out-board engine) and plankbuilt boats are used for gill net fishing. Effort has remained almost constant during the 9 years. Fishes belonging to 10 groups formed about
98% of the gill net fishery
Status of fisheries of Lakshadweep
The Union Territory of Lakshadweep (08
00'N and 12 30'N latitudes and 71 00'E and
74 00'E longitudes), consisting of eleven
inhabited and 25 uninhabited islands, is
scattered in the Arabian Sea at about 200-
400 km from the Malabar Coast.Lakshadweep sea is rich in fishery resources such as the tunas, billfishes
Mar. Fish. Infor. Serv., T&E Ser., No. 187, 2006 2
pelagic sharks etc., and the other groups
of food fishes, live baits and ornamental
fishes.The estimated marine fishery
resources potential in the Lakshadweep
waters are about 63,000 to 1,40,000 tonnes
of various groups of fish, whereas the
present annual production is around 10,000
t (10% of the potential)
Ring seine fishery of Kerala: An overview
Among the various fishing gears employed for
pelagic schooling fishes along the Kerala coast,
seines are the most efficient. Contribution of ring
seine to total marine fish landings of Kerala has
steadily increased since its introduction during the
early eighties. It was 21.4 % in the nineties rising to
36.7 % during the period 2000-2004 and contributing
more than 50 % since then. In recent years, about
90 % of the oil sardine and about 60 % of the
mackerel landed in Kerala were caught in ring
seines. Ring seines were introduced during the early
eighties by traditional fishers of Alappuzha District
which became highly successful
Huntington disease-like phenotype in a patient with ANO3 mutation
A 71-year-old previously well white British female developed progressive involuntary tongue movements over one year, resulting in eating difficulty and 10 kg weight loss. She had also noted involuntary perioral, facial and distal limb movements beginning 18 months earlier. These had progressively worsened. In the 3 years prior to presentation, she reported subjective memory decline, word finding difficulty and depressed mood, which improved with mirtazapine 30 mg once daily. She had no history of neuroleptic exposure. Her brother had died aged 40 years, following years of mental illness and substance abuse. She was estranged from her father, who was said to have had ‘behavioural problems’. Her paternal grandmother and maternal aunt had Parkinson's disease
Indian tuna fishery - production trend during yesteryears and scope for the future
Fishery for tuna and tuna like fishes in the country has been in vogue from time immemorial and presently involves fishery
by coastal based fleets of varying specifications with different craft-gear combinations and longline fishery by large oceanic
fishing vessels. The former undertakes short duration fishing trips and exploit mainly surface tunas in the outer shelf and
adjacent oceanic waters. The tuna landings though nominal during 1950-2005, registered a continuous increase over the
years from a minimum of 848 t (1951) to 46,334 t (2000). With the introduction of targeted fishing for oceanic tunas during
2005-‘06, the landings improved and reached the maximum of 129,801 t in 2008. The fishery was supported by nine species,
five coastal/neritic species and four oceanic species. Coastal tunas formed 57% of the tuna catch during 2006-’10 and was
represented by the little tuna (Euthynnus affinis), frigate tuna (Auxis thazard), bullet tuna (Auxis rochei), longtail tuna (Thunnus
tonggol) and bonito (Sarda orientalis). The oceanic species, which formed 43% of tuna catch, were yellowfin tuna (Thunnus
albacares), skipjack tuna (Katsuwonus pelamis), dogtooth tuna (Gymnosarda unicolor) and bigeye tuna (Thunnus obesus).
Information collected from different sources suggested that longliners operating in Indian EEZ and adjacent international
waters caught around 87,000 t of tuna annually during 2006-'10. Catch was supported by three species dominated by
yellowfin tuna and small proportion of big-eye and dogtooth tuna. Since fishery by coastal based units restricted to small
areas and share of the catch by longliners from EEZ are not clearly known, systematic assessment of tuna stock in Indian
EEZ is very difficult. However, the evaluation of the fishery scenario indicated only limited scope for improving tuna
production from certain areas of coastal waters; whereas enormous scope remain for increasing tuna production from the
oceanic waters of EEZ. However, since tunas being straddling resources shared by several nations, exploitation at one area
will influence the fishery in other areas
Who is exposed to smoke at home? A population-based cross-sectional survey in central Vietnam
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Fishery, biology and stock structure of skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758) exploited from Indian waters
Global catches of skipjack tuna have been steadily
increasing since 1951, reaching a peak in 2009 at 25, 99,681 t
(Fig.1). Most of the catches were reported from the fishing
areas 71, 51, 61 and 34 (FA0, 2011). Globally skipjack
tuna is caught at the surface, mostly with purse seines and
pole and lines and to a small extent by gillnets, troll lines
and longlines. Gears like purse-seine and very long gillnets
enabled few nations to augment their production, whereas
traditional pole and line nations suffered heavily
Reproductive biology, diet and feeding pattern of longtail tuna Thunnus tonggol (Bleeker, 1851) in the north-eastern Arabian Sea off Gujarat, India
Longtail tuna Thunnus tonggol (Bleeker, 1851) is the major tuna resource in the neritic realms of the northern Arabian Sea and forms considerable fishery in the coastal nations in the region. Gujarat, on the north-west coast is the major province landing longtail tuna in India. The paper attempts to add to the hitherto sparse knowledge base on biology of the longtail tuna fished along the north-west coast of India, through a study spanning from 2011 to 2015. Reproductive biology, spawning, food and feeding dynamisms of the species were investigated. Sex ratio of the species was estimated as 1:2.1 and depicted an increase in male preponderance as the size increased. The fish attains maturity at 607 mm and it spawns during summer months starting from May. The fish is typically a non-selective feeder and over 22 taxa comprising of fishes, cephalopods and crustaceans formed the diet at varying rates over the year. Variation in feeding intensity at different reproductive stages is discussed besides the constraint posed by the large presence of unidentifiable, partially digested gut content
Fishery, biology and dynamics of dogtooth tuna, Gymnosarda unicolor (Rüppell, 1838) exploited from Indian seas
Dogtooth tuna, Gymnosarda unicolor (Rüppell, 1838)
(Fig. 1) is a pelagic tuna preferring waters of temperature
between 21 and 26 oC. It is one of the principal species
exploited by hook and line (recreational as well as
commercial fishery) operated in the oceanic region. Meat
of dogtooth tuna is white and so it has great demand and
fetch high price (IUCN, 2011). However, occasional
ciguatera fish poisoning in humans has been reported on
consumption of dogtooth tuna. It is exported in fresh and
frozen state and is used for the production of sashimi,
canned tuna, and pouch products. Most of the world
landings of dogtooth tuna during 1963 -2006 was from the
Indian Ocean. Small scale tuna long lines for the species
operating in the Indian Ocean belong to Taiwan, Srilanka,
Maldives, Japan or Pakista
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