The portunid crab Charybdis (charybdis) feriatus - An emerging fishery resource of Mangalore coast

The marine crab fishery by mechanised trawlers along the Mangalore coast is mainly supported by those belonging to the genera Portunus and Charybdis of the family Portunidae

New crustacean resources in the trawl fishery off Mangalore coast

Since trawling operation started during the sixties, penaeid shrimps, crabs and stomatopods formed the major part of the crustacean fishery, in trawl catches off Mangalore coast with non-penaeids and lobsters to a minor extent

Potential new resources of penaeid prawns of the Mangalore coast

Penaeid prawns belonging to the genera Parapenaeopsis, Penaeus and Metapenaeus of the family Penaeidae exploited by mechanised trawlers support a fishery of considerable magnitude along the Mangalore coast. Among the penaeid prawns exploited Metapenaeus dobsoni, M. Monoceros, M. qffinis, Parapenaeopsis stylifera, Penaeus indicus and P. monodon are important and contribute upto 90-99 % of the prawn catch along this coas

Impact of heavy metals on water, fish (Cyprinus carpio) and sediments from a water tank at Tumkur, India

This study was carried out to assess the concentrations of various heavy metals and their distribution in a hyper-eutrophic urban Tumkur tank system, which is being polluted from industrial, domestic and sewage effluents. Samples of water, fish and soil sediment were analyzed for the concentration of seven heavy metals (iron, zinc, copper, nickel, chromium, lead and cadmium) using atomic absorption spectrophotometry. The water-soluble (bioavailable) fractions of heavy metals correlated positively with their total concentration, exhibiting the following sequence of bioavailability: Zn > Cd > Ni > Pb > Cu > Cr > Fe. Cyprinus carpio exhibited a maximum bioaccumulation factor for copper (5500). The mean values of all types of collected samples were correlated with the corresponding mean values in a control tank (Teetha tank). The sequence of the order of the concentration of the metals in water, fish and sediment samples exhibiting higher values than those observed in the control tank was as follows: Cr > Pb > Cu ≈ Ni > Fe > Cd > Zn, Cr > Cd > Cu ≈ Zn > Pb > Fe ≈ Ni and Fe > Pb > Cr > Cu > Ni > Zn > Cd, respectively. The geoaccumulation indices of the heavy metals revealed that the tank is moderately to strongly contaminated. As Cyprinus carpio is extensively used for human consumption, there is a growing health risk that these metals could find their way into the human food chain

Unprecedented heavy landings of juvenile Kiddy shrimp, Parapenaeopsis stylifera along Karnataka coast

Parapenaeopsis stylifera is one of the most abundant and highly valued shrimp species in India. It forms about 20% of the penaeid shrimp catch of Karnataka with the period from January to June contributing the majority of the catch. In general, the post-monsoon months of August to December is considered as a lean period for P. stylifera. During this period single day fishing trawlers land catch of a mixture of fish, prawns, stomatopods and other crustaceans. The contribution of prawns in the catch is around 10 to 20%

Juvenile polyposis syndrome with extraintestinal anomalies: report of a rare case with review of literature

Juvenile polyposis coli is a rare condition in children with neoplastic potential having an incidence of about 1 in 1,00,000 population. A minority of such patients have extraintestinal abnormalities like cardiac and pulmonary arteriovenous malformations. Juvenile polyposis is a disorder of hamartomatous polyposis syndrome having a malignant potential. The progression of hamartomatous polyp to carcinoma is still elucidated when compared to the understanding of transformation of an adenomatous polyp into a carcinoma via a gatekeeper defect. Here is the report of a rare case of Juvenile polyposis in a 7 year old boy who presented with bleeding per rectum and prolapsed rectum showing multiple polyps. Patient had undergone surgery for closure of ventricular septal defect and pulmonary valvotomy 3 years back. Proctocolectomy was done and the resected colon showed 40 polyps. Histologically polyps contained benign glandular tissue and one of the larger polyps showed low grade epithelial dysplasia. In this case, there was no positive family history and extraintestinal congenital defects are said to be more common in such sporadic cases

Unusual occurrence of oil sardine along Uchila and Ullal beach on 21st and 28th July 2000

In an unusual instance, live oil sardine in very good numbers were handpicked from the beach at Uchila and Ullal, near Someshwara 20 km south of Mangalore. The beach at Someshwara is very steep and the sea is very rough especially during the monsoon months

कर्नाटक तट का गहराई मापन और चिंगटों का मौसमिक वितरण

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Catfish reappeared in Dakshina Kannada Coast

After a gap of several years catfish reappeared in Malpe during September, 1994. Three purse seiners together landed three tonnes of catfish Tachysurus serratus (90 per cent) and T. dussumieri (10 per cent

'Marinefish-famine'(?) In Karnataka with particular reference to Udupi district during 1998-'99

'Marinefish-famine' is an issue often raised by the fishermen of Karnataka over the past several years whenever, they are affected monetarily and there is a failure of major fisheries of the region like mackerel and oil sardine and the high-value resources like cuttlefishes, squids and prawnsThe production of 1,64,710 t in 1998 is less by 12.3%(23,048 t) compared to 1997 but, higher than the average production of 1.59,567 t for 1993-'97. Therefore, this marginal decrease in production in 1998 cannot be considered as anyfishfamine condition in the marine fishery sectorof the state during 1998. As far as the fishery situation during 1998-99 in the Udupi district is concerned, the study on the fish landing at the largest landing centre of the district i.e., Malpe Fisheries Harbour shows that the production during 1998-'99 was normal compared to the past several years but, when compared to the previous year (which was one of the two most productive years since the commssioning of the MFH in 1986-'87 with a record landing of 50,558 t), the landing declined by 31.4% (15,897 t). Short-term, long-term and cyclic fluctuations in marine fish landings are common features and are governed by a complex of biotic and abiotic factors and the exact causes for these variations are largely unknown. Therefore, the decrease of 12.8 and 31.4% in the marine fish landings of the state and Udupi district with reference to Malpe Fisheries Harbour respectively during 1998-'99 can be treated as one such short-term fluctuations and hence, the year cannot be considered as fish famin