Mariculture of Kappaphycus alvarezii in the coastal waters of Palk Bay: crisis due to climate change or carrying capacity?

Gradual expansion in the cultivation of carrageenan yielding red alga, Kappaphycus alvarezii in the Palk Bay from the year 1996 reached its peak in 2012. Large scale introduction of numerous rafts bearing propagules of this marine alga within the bay area registered tremendous decline in the production due to decay of thallus and poor growth since August 2013. At present more than 50% of the rafts were abandoned in the shore due to drastic reduction in yield and for want of sufficient seed material required for subsequent crop. Analysis of data on SST and nutrient profile of seawater from Palk Bay area demands need for urgent carrying capacity studies for optimum biomass production. It is advisable to restrict the number of rafts (3 x 3 m size) to 225 and seed quantity of 5.4 to 6.0 tonnes per hectare

Wealth from waste-utilisation of fish waste for production of biogas

A biogas unit was installed in the premises of Mangalore Research Centre of CMFRI during November, 2016 in order to utilize the fish waste generated from the biological analysis done in the lab. This biogas unit installed is first of its kind in the state to utilize fish waste. A unit was installed gainfully utilizing the fish waste generated after the biological analysis of fish. Disposal of the fish waste generated periodically at the Research Centre during sampling made for biological studies was becoming difficult. However, with the installation of the biogas unit- designed and supplied by private manufacturer in Kerala, solved the disposal problem of fish waste

Samarasya-National workshop on Harmonizing Coastal Industrialization with Marine Ecosystem Health

Sāmarasya, the Souvenir released on the occasion of National Workshop, HCIMEH, 2017 at Mangaluru, commemorating the Platinum Jubilee of ICAR- Central Marine Fisheries Research Institute (National workshop on Harmonizing Coastal Industrialization with Marine Ecosystem Health

Marine Fisheries Policy Series-5; Management Plans for the Marine Fisheries of Karnataka

Management Plans for the Marine Fisheries of Karnatak

Seasonal trend of potential toxic elements in seawater and sediments from Tuticorin coast

Potential toxic elements (PTEs) concentration was analyzed seasonally in seawater and sediment samplesfromTuticorincoast,India.TheextentofPTEs contamination in Tuticorin coast has been revealed by measuring the concentrations of iron (Fe), nickel (Ni), zinc (Zn), copper (Cu), cadmium (Cd), and lead (Pb) using inductively coupled plasma mass spectrophotometer (ICP-MS) seasonally. The concentration of all the PTEs in seawater samples was higher in summer and least in spring. The concentration of all the PTEs was significantly different within and among the season except for Zn and Cu. The concentration of PTEs in sediment samples was higher in winter and least in summer seasons. Exceptionally, the concentration of Cd was not significant among and within the seasons. TheconcentrationofthePTEsinseawaterandsediment samples exceeded the WHO-recommended limits. The contamination factor (CF) and geoaccumulation index (Igeo) values indicated significant contamination of PTEs in the sediment samples collected in different seasons. Variations in the concentration of PTEs could be due to changes in levels of pollution discharge over time, availability of PTEs for adsorption, as well as variations in the sampling season. The presence of a number of industries surrounding the Tuticorin coast and the release of the effluents from both industries and domestic sources are the main source of pollution at Tuticorin coast and are the prime reasons for the loss of existing diverse ecosystem