92 research outputs found
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The culture of marine finfish in cages was successfully initiated in Japan in 1950s and
in South East Asia during 1970s. In the initial years of cage culture, fish seed for culture was
collected from the wild. Recent developments in hatchery technology and seed production of
commercially important marine finfish and shellfish have ensured the continuous supply of
seed for mariculture practices. The disease control and health management are important
issues for sustainable aquaculture. The disease occurrence causes major economic loss to
aquaculture farmers. Production costs often increase due to disease outbreaks and treatment
procedures followed to overcome death of fishes during culture. In natural aquatic
environments, disease problems are unnoticed as diseased/weak/stressed fishes are easily
removed by predators and very few occurrences of disease outbreaks are reported. Moreover
in natural environment fish are not crowded as in captive culture conditions, which ultimately
causes stress in fishes frequently
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Sea farming is a popular area of aquaculture practice throughout the world. In Asian
countries, it is rapidly growing to meet the increasing demand of high value marine fishes.
Although India has a tradition of aquaculture, sea farming ventures on commercial scale were
lacking. In this context, Central Marine Fisheries Research Institute started open sea floating
cage culture activities in 2006-07 with Department of Animal Husbandry, Dairying and
Fisheries (DAHD&F), Government of India assistance. Indigenous cage of 15 m diameter
was fabricated following Norwegian open sea floating cage design and launched at
Visakhapatnam. There was a technical setback with the design of cage, and consultation with
Indian Institute of Technology, West Bengal helped to overcome technical issues with the
cage structure. Open sea floating cage diameter was reduced to 6 m and 14 new open sea
floating cages were launched at Sutrapada (Gujarat), Vasai (Maharashtra), Mangalore
(Karnataka), Cochin (Kerala), Pulicat (Tamil Nadu), Nellore, Kakinada, Baruva (Andhra
Pradesh) and Balasore (Odisha) in participation with National Fisheries Development Board
(NFDB)
Health monitoring and disease management
The culture of marine finfish in cages was successfully initiated in Japan in 1950s and
in South East Asia during 1970s. In the initial years of cage culture, fish seed for culture was
collected from the wild. Recent developments in hatchery technology and seed production of
commercially important marine finfish and shellfish have ensured the continuous supply of
seed for mariculture practices. The disease control and health management are important
issues for sustainable aquaculture. The disease occurrence causes major economic loss to
aquaculture farmers. Production costs often increase due to disease outbreaks and treatment
procedures followed to overcome death of fishes during culture. In natural aquatic
environments, disease problems are unnoticed as diseased/weak/stressed fishes are easily
removed by predators and very few occurrences of disease outbreaks are reported. Moreover
in natural environment fish are not crowded as in captive culture conditions, which ultimately
causes stress in fishes frequently
Mass envenomation during Ganesh idol immersion at Girgaum-Chowpathy beach, Mumbai, Maharashtra
At the end of South-West monsoon along
Mumbai coast a swarm of the box jelly fish,
Chiropsoides buitendijki was observed during
Ganesh idol immersion at Girgaum-Chowpathy
beach, Mumbai on 10th September, 2013. The
occurrence of such large number of jelly fishes
coincided with Ganesh idol immersion, perhaps for
the first time in Mumbai waters. Several devotees
of Ganesh who congregated at Girgaum-Chowpathy
beach for immersion ritual of Ganesh idol were stung
by the jelly fish. According to the news paper
reports, the devotees moved with the idol in ankledeep
water for immersion and immediately thin
tentacle-like threads pierced legs and ankles causing
severe burning sensation
Assessment of biogeochemical processes of Ashtamudi Lake ecosystem in relation to clam fishery
The Ashtamudi Lake ecosystem in Kerala
(southwest coast of India) is well known for its clam
resources. This estuarine system contributes
approximately 80% of the total clam export trade of
India besides providing livelihoods for at least 3,000
local people. Among bivalves, clams are an important
source of meat for human consumption while its
shells are used in the cement industry
Cage culture in maharashtra: present and future prospects
Sea farming is a popular area of aquaculture practice throughout the world. In Asian
countries, it is rapidly growing to meet the increasing demand of high value marine fishes.
Although India has a tradition of aquaculture, sea farming ventures on commercial scale were
lacking. In this context, Central Marine Fisheries Research Institute started open sea floating
cage culture activities in 2006-07 with Department of Animal Husbandry, Dairying and
Fisheries (DAHD&F), Government of India assistance. Indigenous cage of 15 m diameter
was fabricated following Norwegian open sea floating cage design and launched at
Visakhapatnam. There was a technical setback with the design of cage, and consultation with
Indian Institute of Technology, West Bengal helped to overcome technical issues with the
cage structure. Open sea floating cage diameter was reduced to 6 m and 14 new open sea
floating cages were launched at Sutrapada (Gujarat), Vasai (Maharashtra), Mangalore
(Karnataka), Cochin (Kerala), Pulicat (Tamil Nadu), Nellore, Kakinada, Baruva (Andhra
Pradesh) and Balasore (Odisha) in participation with National Fisheries Development Board
(NFDB)
Sediment blue carbon stock of Avicennia officinalis in Vembanad Lake ecosystem, Kerala, India
Stock assessment of the blue carbon pool of selected patches of
mangrove sediment in the Vembanad Lake was done using the
standard protocols on a per ha basis and multiplied with the
estimated area to derive the blue carbon stock of the particular
fragmented mangrove stands of the species Avicennia officinalis
(Indian Mangrove), twice (in the post and pre-monsoon) during
October 2017-March 2018. The treatments included тАШagedтАЩ,
тАШrecentтАЩ, тАШhealthyтАЩ and тАШdegradedтАЩ mangroves of the selected
species and тАШcontrolтАЩ without mangroves. The overall mean
carbon stock in the A. officinalis sediments in selected locations
of the Vembanad Lake area was 136.09 Mg C/ha (Mg=mega
gram=1 tonne). This value is far low compared to the mean
global soil organic carbon stock in the mangrove ecosystem
(386 Mg C/ha). This finding suggests ample opportunity for
more carbon sequestration in the selected mangrove ecosystems
in Vembanad Lake, toward climate change mitigation measures.
The treatments differed significantly in the cumulative stock of
blue carbon and layer-wise blue carbon density in sediment
(p<0.05), the highest seen in тАШhealthyтАЩ mangroves in both
seasons. The overall range of layer-wise blue carbon density in
sediment was found to be 0.003 to 0.56 Mg/m3. Spatial maps
prepared for layer-wise blue carbon density in the sediment
revealed its depth-wise increase. Layer wise blue carbon stock in
sediment had a significant correlation with total organic carbon
and organic matter (p<0.01) and with the C/N ratio of the
sediment (p < 0.05). Based on the results, this study suggests
total organic carbon and the C/N ratio of sediment as possible
predictive indicators of sediment blue carbon
Status of India's Exploited Marine Fishery Resources in 2013
The Central Marine Fisheries Research Institute
start collected and estimation of marine fish
landings for the peninsular coast of India since its
inception in 1947, based on a stratified multistage
random sampling technique. This which continues
to date, and provides knowledge-base for many
research, planning and policy initiatives in the
marine fisheries sector
Design, Performance, and Calibration of the CMS Hadron-Outer Calorimeter
The CMS hadron calorimeter is a sampling calorimeter with brass absorber and plastic scintillator tiles with wavelength shifting fibres for carrying the light to the readout device. The barrel hadron calorimeter is complemented with an outer calorimeter to ensure high energy shower containment in the calorimeter. Fabrication, testing and calibration of the outer hadron calorimeter are carried out keeping in mind its importance in the energy measurement of jets in view of linearity and resolution. It will provide a net improvement in missing \et measurements at LHC energies. The outer hadron calorimeter will also be used for the muon trigger in coincidence with other muon chambers in CMS
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