NOPR Collection: http://nopr.niscpr.res.in/handle/123456789/37469 2026-10-09T00:54:00Z 2026-10-09T00:54:00Z Upwelling and fish mortality, in the northern Gulf of Aden Alsayed, A Ghaddaf, M http://nopr.niscpr.res.in/handle/123456789/37937 2016-11-30T12:08:56Z 1993-12-01T00:00:00Z Title: Upwelling and fish mortality, in the northern Gulf of Aden Authors: Alsayed, A; Ghaddaf, M Abstract: An attempt was made to investigate the annual fish mortality and the influence of upwelling process during southwest monsoon. The sharp change in the temperature, salinity and variation in the topography of oxygen minimum layer have strong effect on fish mortality in the northern part Gulf of Aden. Page(s): 305-307 1993-12-01T00:00:00Z Responses of shrimp Penaeus indicus post larvae to luminous bacteria Vibrio harveyi Pillai, Devika Jayabalan, N http://nopr.niscpr.res.in/handle/123456789/37936 2016-11-30T12:06:14Z 1993-12-01T00:00:00Z Title: Responses of shrimp Penaeus indicus post larvae to luminous bacteria Vibrio harveyi Authors: Pillai, Devika; Jayabalan, N Abstract: Advanced post larvae;of Penaeus indicus challenged with Vibrio harveyi inoculum levels of 10(3), 10(4) and 10(5) CFU.ml(-1) for 96 h did not show luminescence or other clinical signs of luminous vibriosis. Though the exposed larvae were normal, accepted feed, and were active till the termination of experiment, the isolation of bacteria from haemolymph suggests their opportunistic pathogenicity: It appears that virulence of the strains, and susceptibility of hosts are Important factors leading to mortality of prawn larvae in hatcheries. Page(s): 303-304 1993-12-01T00:00:00Z β-Glucosidase activity in Micrococcus sp. from the retting ground Dhevendaran, K Radha, S Natarajan, P http://nopr.niscpr.res.in/handle/123456789/37935 2016-11-30T12:02:27Z 1993-12-01T00:00:00Z Title: β-Glucosidase activity in Micrococcus sp. from the retting ground Authors: Dhevendaran, K; Radha, S; Natarajan, P Abstract: Water, sediment and husk samples collected from the retting ground of Anchuthengu region, Kerala, for beta-glucosidase producing microorganisms showed wide variations. Screening of 12 bacterial strains for beta-glucosidase activity and growth exhibited narrow ranges. Sodium chloride, sodium sulfide and threonine were essential for growth and synthesis of beta-glucosidase. Page(s): 300-302 1993-12-01T00:00:00Z Effect of different media for isolation, growth and maintenance of actinomycetes from mangrove sediments Kala, R Ratha Chandrika, V http://nopr.niscpr.res.in/handle/123456789/37934 2016-11-30T11:58:37Z 1993-12-01T00:00:00Z Title: Effect of different media for isolation, growth and maintenance of actinomycetes from mangrove sediments Authors: Kala, R Ratha; Chandrika, V Abstract: Out of many recommended media for selective isolation of actinomycetes from soil; glucose asparagine agar, Grein and Meyer's agar, oat meal agar and Kuster's agar were found suitable for isolation of actinomycetes from mangrove sediments. The best media allowing good development of actinomycetes, while suppressing bacterial growth, were those containing starch or glucose as the carbon source with casein, and asparagine or nitrate as the nitrogen source. Seawater-agar was also tried for isolation and maintenance and found extremely good as a maintenance medium. Bacteriostatic and fungistatic compounds such as calcium carbonate, phenol, lactic acid and acetic acid were used for selective isolation of actinomycetes, Page(s): 297-299 1993-12-01T00:00:00Z