Cobia Rachycentron canadum (Linnaeus, 1766)

Cobia is a high-value marine migratory pelagic finfish, distributed worldwide in tropical, subtropical and warm-temperate waters. Considered an important fish for mariculture

Silver Pompano Trachinotus blochii (Lacépède, 1801)

Silver pompano is a commercially important high priced marine finfish, widely distributed in the East and West Coasts of India, Atlantic and Pacific Oceans. It forms an important candidate for cage aquaculture

Broodstock development, breeding and larval rearing of cobia and pompano

Cobia (Rachycentron canadum) and silver pompano (Trachinotus blochii) are two marine finfish species with very high potential for aquaculture in India. Fast growth rate, adaptability for captive breeding, low cost of production, good meat quality and high market demand especially for sashimi industry are some of the attributes that make cobia an excellent species for aquaculture. In recent years the seed production and farming of cobia is rapidly gaining momentum in many Asian countries. Similarly, pompano is having fast growth rate, good meat quality and high market demand. Envisaging the prospects of cobia and pompano farming in India, broodstock development was initiated at the Mandapam Regional Centre of Central Marine Fisheries Research Institute in sea cages during 2008 and the first successful induced breeding and seed production was achieved for cobia in March – April 2010 and for pompano during July 2011

Green Tiger Prawn Penaeus semisulcatus (De Haan, 1844)

Green tiger prawn is a commercially important penaeid shrimp species, dominant in the coastal waters of Tamil Nadu. Grows to 230 mm and 270 mm in TL in case of males and females, respectively

Knowledge and achievement motivation of marine fishers : A case of alternate livelihood options in Tamilnadu

In recent past, farming of marine fishes is being encouraged among the marine fishers to supplement the household income from capture fisheries, because the fish catch is declining. The study on extent of knowledge and achievement motivation of marine fishers’ adopting alternate livelihood options like sea cage farming, seaweed farming and ornamental fish culture was conducted in Ramanathapuram district of Tamil Nadu since many marine fisheries related activities are being undertaken in larger scale in comparison to other coastal districts. Overall analyses on level of achievement motivation reveal that majority of respondents who are adopting the alternate livelihood options are having medium to high level of achievement motivation. All the farming options have to be undertaken in the sea, which is a common property and it demands a common consensus in a particular village or region for taking up an activity in a desirable and profitable way. Hence, the need for personal achievement was present in majority of fishers, followed by personal achievement oriented influence and need for social achievement. The study found that fishers were able to perform better in the knowledge test since they gained adequate knowledge on all the alternate livelihood options

Fattening of mud crab: an approach of aquasilviculture in Andaman Islands

During September - December 2004, mud crab fattening was attempted in tide-fed earthen ponds in Lakshmipur (North Andaman) and Bamboo Tickri (Middle Andaman) with mangroves such as Rhizophora mucronata, R. apiculata and Avicennia marina, covering 60 to 80% of the total pond area. Water crabs of Scylla tranquebarica, S. olivacea and S. serrata, each weighing 500 - 1500 g were stocked in the pond at a density of 0.5 kg/m2 with suitable hideouts to reduce cannibalism. In 30 to 35 days, 85% survival was obtained with 8% weight increment. This paper outlines the measures that may be adopted for practicing aquaculture in mangroves

Studies on the controlled rearing and ideal range of Environmental Conditions required for the mass production of selected marine copepods as Live-Feed for marine fish larvae

Studies on the controlled rearing and ideal range of Environmental Conditions required for the mass production of selected marine copepods as Live-Feed for marine fish larva

Cage Farming of Cobia Rachycentron canadum

Cobia has gained popularity as a good candidate for mariculture due to its rapid growth and white meat of versatile use. It is considered as one of the most promising candidates for warm-water marine fish aquaculture in the world. Being the only member of the family Rachycentridae, it is found in the warm, temperate to tropical waters of the West and East Atlantic, throughout the Caribbean and in the Indo-Pacific off India, Australia and Japan. To date, research and development of cobia aquaculture has been initiated in over 23 countries and territories

प्रजाति विविधीकरण – तटीय जलकृषि में स्थिरता सुनिश्चित करने का उपाय

कृपया पूरा लेखा पढ

Economic analysis of farming and wild collection of seaweeds in Ramanathapuram District, Tamil Nadu

The commercially important red alga Kappaphycus alvarezii is widely cultivated along Tamil Nadu coast. Apart from farming, wild collection of seaweed is also being practiced by fishers for their livelihoods. The present study on economics and constraints of farming and wild collection of seaweeds was undertaken in the Ramanathapuram District of Tamil Nadu, employing an expost-facto research design. The study found that the total cost of production for fabricating one bamboo raft (12 x 12 feet) was `1,050/-. The crop duration was 45 days and four to six crops were harvested in a year. The average yield was 200-260 kg per raft per crop. The price of harvested kappaphycus on wet and dry weight basis were `4 and `37.50 per kg respectively. Majority of seaweed farmers earned around `50,000/- to 1,00,000/- annually and the profit margin was 60%. The average gross revenue per trip per group of five members for wild collection of seaweed worked out to `6,700/- and the capital productivity was 0.30. It is interesting to note that about 20% of the respondents were those who left fishing and switched to farming and wild collection of seaweeds