FT Vol.22(1)
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- ItemTHE EFFECT OF SALINITY ON SOME ENDOCOMMENSALIC CLIMATES FROM SHIP WORMS(Society of Fisheries Technologists (India) Cochin, 1985)The ciliates, Nucleocorbula adherens, Boveria teredinidi, Trichodina balakrishnia, Thingmozoon fencheli and Nyctothereus marina, live inside the mantle cavity of the shipworms in the estuaries and backwaters of the south-west coast of India. Seasonal incidence and relative abundance of these ciliates showed that they were more abundant during the low saline than the high saline periods. Eventhough these ciliates can endure higher salinities through gradual acclimatization of their habitat it was found that they prefer low salinity for active growth and healthy existence.
- ItemSTUDIES ON THE PROBABLE SOURCES OF FUNGAL INFECTION AND THE CONTROL MEASURES IN A FISH SEED FARM(Society of Fisheries Technologists (India) Cochin, 1985)The causes of mortality of fry of cultivable fishes in a fish seed farm were investigated. The mortality was due to fungal infection and the pathogen was Saprolegnia sp. The sources of infection were unhygienic breeding hapas, spawnery hapas in the cemented ponds, hatching jars and excess feeding. Application of one kg slaked lime foHowed by 75g of CuSo4 (l-0.5 p.p.m.) and 150g of KMno4 (2-1 p.p.m.) per each nursery (]_58m3 water) controlled the pathogen.
- ItemSTUDIES ON THE OCCURRENCE OF ENTERIC BACTERIA IN THE ESTUARINE WATERS ALONG MANGALORE COAST(Society of Fisheries Technologists (India) Cochin, 1985)Occurrence of enteric bacteria in water, sediment and shellfishes of Mulki, Pavanje, Gurpur and Netravathi estuaries of the Mangalore coast is reported. 70 water samples, 71 sediment samples and 37 shellfish samples were analysed in 18 months. Total bacterial load in sediment and shellfishes was found to be more than that in water samples. The total bacterial load was not very high. However, enterococci, particularly coliforms in sediments, water and shellfishes were found to be quite high, indicative of faecal pollution. The incidence of Salmonella spp. was recorded in all the estuaries except the M ulki Estuary
- ItemRAPAPPORT'S BROTH , A BETTER ENRICHMENT MEDIUM IN THE IDENTIFICATION OF SALMONELLA FROM PROCESSED FROG LEGS(Society of Fisheries Technologists (India) Cochin, 1985)Salmonella serotypes recovered from processed frog legs were compared on three enrichment media,Selenite cystine broth (SC),Tetrachionate broth (TT) and Rapapports broth (RB) 25/37°C after pre-enrichment in lactose broth. The studies indicate that enrichment media RB 25/37°C is superior to SC broth as well as TT broth. TT broth facilitated more of Salmonella serotypes to grow, where as SC broth enabled different groups of salmonella serotypes to grow.
- ItemA RE-DESCRIPTION OF THE LITTLE KNOWN RABBIT FISH SIGANUS LINEATUS(CUVIER AND VALENCIENNES)(PISCESSIGANIDAE)WITH NOTES ON SIGANID FISHES OF THE VEMBANAD LAKE(Society of Fisheries Technologists (India) Cochin, 1985)Siganus lineatus (Cuv. and Val) is reported from the coast of peninsular India for the first time and a detailed description of it is given based on morphology and meristic characters. It differs from the other allied species of the genus Siganus Forskal in having an oval body without spots and having fifteen parallel longitudinal golden yellow bands, relatively larger last dorsal spine, maxillary position far below the level of the orbit and cheek with distinct rows of scales. S. javus (Linnaeus) and S. canaliculatus (Park) were also obtained from the Vembanad Lake. Short notes on the habitat, occurrence, abundance, seasonal and geographic distribution in relation to fluctuating hydrological conditions of the Vembanad Lake are incorporated together with a key for their identification