24 research outputs found
Kerala Dheevara Mahasabha - a success story
To an extent we could accomplish solid waste management by removal of plastic wastes
from coastal waters. In 2nd October 2017, our organization members had actively
involved in the Kayal cleaning programme of Vembanad Lake, Marine drive, Kochi,
removing the buried and floating marine debris form the lake.
We have also provided the women of employment guarantee programme, involved
in solid waste management activities with hats and jerseys and also actively involved
with them in the cleaning programmes in Nayarambalam
Socio-economic analysis of finfish culture in cages in coastal waters of Kerala, southwest coast of India
Cage culture of finfish is becoming a popular alternate source of
livelihood in Vembanad Lake in Kerala, India. A study was conducted
during November to December, 2016 to assess the socio-economic
status of the farmers practicing cage culture in Kerala and the
resultant economic benefits. Data on demographic features, farming
activities, specific culture and farm management practices, economics
and problems related to cage farming were collected from 36 active
farmers of the Ernakulam District. Etroplus suratensis (Pearl spot),
Lates calcarifer (Asian sea bass), and Genetically Improved Farm
Tilapia (GIFT) were the major species culture
Report on occurrence of Yellow Sea Snake Hydrophis spiralis off Kerala coast
Sea snakes play an important role in the marine
food web and studies on their diversity and
distribution are very limited in India. Globally, 70
species of sea snakes have been reported under the
family Elapidae which is divided into two subfamilies
(i) Laticaudinae and (ii) Hydrophiinae. Sea snakes
belonging to the subfamily Hydrophiinae are
considered as ‘true sea snakes’ with 62 species
which are viviparous (give birth to live young at
sea). Laticaudinae sea snakes called the ‘sea kraits’
have 8 species and are oviparous. They come to the
land for mating and to lay eggs
Marine mammal strandings along the Indian coast mapped
The stranding locations of marine mammals
namely blue whale (Balaenoptera musculus),
Bryde’s whale (Balaenoptera edeni), fin whale
(Balaenoptera physalus), humpback whale
(Megaptera novaeangliae) and minke whale
(Balaenoptera acutorostrata) along the Indian coast
were mapped (Fig. 1) using passive method. The
data was collected for the period 1874 to 2016
Geospatial Technology: An Effective tool for marine mammal conservation
Geospatial Technology: An Effective tool for marine mammal conservatio
Mulching brown seaweed Sargassum wightii during transplant on the growth and yield of paddy
Seaweeds gain importance recently in agriculture as several studies have shown that chemicals extracted from seaweeds are used as soil amendments to increase crop yield. We report here the positive effects of brown seaweed Sargassum wightii on paddy when applied as mulch during transplantation trials carried out in a progressive farmer’s field
Report on the deep sea swarming crab
Deep sea swarming crab Charybdis
(Goniohellenus) smithii MacLeay, is found in the
depth range between 60 to 356 m in the Arabian
Sea and Bay of Bengal and believed to play a
significant role in the marine food web.
Observations from a trawl survey aboard F V Silver
Pompano at 40 m depth that was made on 17th
October, 2017 is reported. The trawl was operated
in the afternoon for one hour, from 09° 57’55" to
10° 00’ 03" North and 75° 55’ 37" to 75° 53’ 50"
East coordinates at a speed of 3.5 knots/hour
Water quality management in aquaculture
In aquaculture, water quality is one of the prime factors that
determines the success of that particular culture. Primarily
the water quality parameters are divided into three major
categories, physical, chemical and biological. But a slight change
in some of the parameters especially pH,temperature,DO will
lead to stress in the organism and it may be of physiological
or behavioral. Deteriorated or changed water quality will affect
growth,reproductive capacity. Susceptibility to diseases is also
more in such environment. Water qualitymanagement measures
aim at improving water quality. Aquaculture entrepreneurs should
know the basics of water quality management measures in
aquaculture to reduce the problems related with water quality
so as to utilize the of water body with viable profit as well as
environmental sustainabilit
Eco-friendly bags - an alternative to plastic carry bags
Fishery Environment and Management Division of CMFRI is always focussing on
environment concern issues apart from Research on Marine Environment .One
of the major threats the ecosystem faces in the present world is the impact
due to non-degradable wastes especially plastics. Enumerable numbers of
Plastics in the form of carry bags enter in to our houses and it has become an
inevitable item in the daily life. But the improper waste disposal due to poor waste
management facilities available in our society causes the accumulation of these
non-degradable plastic materials on the road sides and open grounds there by
polluting the ecosystem
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 ‘aged’,
‘recent’, ‘healthy’ and ‘degraded’ mangroves of the selected
species and ‘control’ 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 ‘healthy’ 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