सागरी मत्स्यशोतीच्या साहाय्याने मत्स्योत्पादनात वाढ

In the past 3 years, open sea floating cage farming has been successfully demonstrated by CMFRI for seabass (Khajura), pompano, cobia (Sakla or Modosa) and lobsters (Shewand) in nearshore waters. The Institute has developed a cage farming hub at Karwar, where locally available fish varieties are being tried for open sea culture.With the success of demonstration Training manual on “Cage Culture of Marine Fin fish and Shell fish in Open Sea” 5 farms, the National Fisheries Development Board (NFDB) has come forward for funding cage farming in big way. In the case of small scale farmers, cage farming can be easily combined with their capture fisheries operations. A floating cage (3 m dia) can be used for rearing undersized commercial varieties of fish. Most of these varieties can be fed with low value bycatch netted by the fishermen and minimize the input costs. Red snapper and some of the perches (Acanthopagrus berda) grow to marketable size within 6-8 months which can enhance their income. In addition, once the fishermen practice rearing, conservation of fish resources which are already under threat from over-exploitation in coastal waters may become easier

केंद्रीय समुद्री मात्स्यिकी अनुसंधान संस्थान का मुम्बई अनुसंधान केंद्र

केंद्रीय समुद्री मात्स्यिकी अनुसंधान संस्थान का मुम्बई अनुसंधान केंद्

Some aspects of biology of Octopus defilippi Verany, 1851 from the northwest coast of India

‘Lilliput longarm octopus’, Octopus defilippi Verany, 1851 has been reported for the first time from Mumbai waters, northwest coast of India. This species was observed in trawl catches off Mumbai during March-June from 2007 onwards and the dorsal mantle length (DML) ranged between 52 and 99 mm. The left arm ratio is 3>2>4>1 and the right arm ratio is 2>4>1>3. Relationship between DML and total body weight (TBW) was TBW = 0.01361 * DML 1.83443. Fish formed the major food item with 93.3% and 70.6% of individuals in the samples in mature condition

Age and growth of Jhinga prawn Metapenaeus affinis Milne Edwards (Decapoda, Penaeidae) in Mumbai waters

The results of the studies on age and growth of Metapenaeus affinis, one of the dominant species of penaeid shrimps in the coastal waters off Maharashtra are presented. From monthly size-frequency data, the growth parameters for males and females were estimated employing modal progression and computer based FiSAT software package using ELEFAN program, Bhattacharya method, Gulland-Holt plot, Faben’s method, Appeldoorn’s method and von Bertalanffy plot. The estimates obtained by Bhattacharya analysis and Gulland-Holt plot were: L� = 162 mm, K = 2.25 for males and L� = 204 mm, K = 1.91 for females. Males and females were found to attain 145 mm and 174 mm at the end of one year and their life spans were 1.16 and 1.4 years respectively

Commercially exploited edible bivalves off Mumbai

Bivalves are benthic molluscs occurring in intertidal to subtidal areas. In the food chain they feed low, mainly on plankton and detritus, which are abundantly available in the natural waters circulated by the tides . . Many species of bivalves occur abundantly along the Indian coast of which at least 50 species are commercially important. Edible oysters, clams, cockles, mussels and scallops are the prime groups, which contribute towards the fishery in the marine, estuarine and freshwater habitats

Record of inarticulate Brachiopoda, Lingula sp. from mangrove areas in Ratnagiri, Maharashtra and its unusual commercial exploitation

The Brachiopoda or ‘lamp shells’ belong to an ancient phylum of filter feeding marine worms. They live inside a pair of shells much like the bivalve; however, brachiopods differ from bivalves in many ways. Their shells have a definite dorsal and ventral (upper and lower) half, while bivalves, which are molluscs, have left and right halves to their shells. The brachiopods are so different internally that they have been grouped under separate phylum. Lingula is a genus of brachiopods with about eleven species within the family lingulidae

Emergence of squid jigging in India

Cephalopods, locally known as 'Makul', have emerged in recent times as one of the prime foreign exchange earners in India. Trawl nets operating up to 100 m depth account for nearly 85% of the cephalopod landings in Indian marine waters. The introduction of high opening bottom trawl nets resulted in rapid increase in cephalopod productio

Potentially harmful advantage to athletes: a putative connection between UGT2B17 gene deletion polymorphism and renal disorders with prolonged use of anabolic androgenic steroids

ABSTRACT: BACKGROUND AND OBJECTIVE: With prolonged use of anabolic androgenic steroids (AAS), occasional incidents of renal disorders have been observed. Independently, it has also been established that there are considerable inter-individual and inter-ethnic differences, in particular with reference to the uridine diphosphate-glucuronosyltransferase 2B17 (UGT2B17) gene, in metabolising these compounds. This report postulates the association of deletion polymorphism in the UGT2B17 gene with the occurrence of renal disorders on chronic exposure to AAS. PRESENTATION OF THE HYPOTHESIS: The major deactivation and elimination pathway of AASs is through glucuronide conjugation, chiefly catalyzed by the UGT2B17 enzyme, followed by excretion in urine. Excretion of steroids is affected in individuals with a deletion mutation in the UGT2B17 gene. We hypothesize that UGT2B17 deficient individuals are more vulnerable to developing renal disorders with prolonged use of AAS owing to increases in body mass index and possible direct toxic effects of steroids on the kidneys. Elevated serum levels of biologically active steroids due to inadequate elimination can lead to prolonged muscle build up. An increase in body mass index may cause renal injuries due to sustained elevated glomerular pressure and flow rate. TESTING THE HYPOTHESIS: In the absence of controlled clinical trials in humans, observational studies can be carried out. Real time PCR with allelic discrimination should be employed to examine the prevalence of different UGT2B17 genotypes in patients with impaired renal function and AAS abuse. In individuals with the UGT2B17 deletion polymorphism, blood tests, biofluid analyses, urinalysis, and hair analyses following the administration of an anabolic steroid can be used to determine the fate of the substance once in the body. IMPLICATIONS OF THE HYPOTHESIS: If the hypothesis is upheld, anabolic steroid users with a deletion mutation in the UGT2B17 gene may be exposed to an increased risk of developing renal disorders. In the current detecting - sanctioning anti-doping system, athletes motivated by the potential to evade detection owing to their unique genetic make-up could subject themselves to a serious health consequence. More research on AAS metabolism in the presence of UGT2B17 gene deletion is required. Benefit - harm evaluations in therapeutic use of anabolic steroids should also consider this potential link between UGT2B17 gene deletion polymorphism and renal disorders

The non-penaeid prawn resources

The non-penaeid prawns, with the average catch of 57,000 tonnes, constitute one of the important marine resources in India. During 1979-'88 period, the catch of these prawns ranged from 36,303 - 71,985 tonnes, contributing 2.2 - 5% to the total marine fish production of the country. They form nearly 32% of the total prawn production. Although non-penaeid prawns are found all along the coastline, they form fisheries of commercial importance only along the northwest and the northeast coasts