5ee6a81d-3ece-49bb-8d95-53289bd209fc eng utf8 dataset pointOfContact National Centre for Polar and Ocean Research (NCPOR) +91-832-2525515 voice Headland Sada, Vasco da Gama, Goa 403804 Vasco-da-Gama Goa 403804 IND vssamy@ncpor.res.in Mr. Sakthivel Samy V 2021-01-29T00:00:00 creation ISO 19115-1 Geographic information - Metadata - Part 1: Fundamentals ISO 19115-1:2014 Production of Certain Hydrolytic Enzymes by Psychrophilic Bacteria from the Antarctic Krill, Zooplankton and Seawater. 2020-09-09T00:00:00 creation Document digital Psychrophilic bacteria isolated from krill, zooplankton and water samples collected in the Indian Ocean Sector of Southern Ocean during the Ninth Indian Expedition were enumerated and several strains subjected to various biochemical tests. Presence of different enzymes was examined from about 500 of these strains. Bacterial numbers were the highest in the krill gut samples moderate on zooplankton surfaces and low in water and the ice. Pseudomonas, Vibrio. Chromobacterium, Aeromonas, Acinetobacter and Moraxella were the genera among the Gramnegative organisms. Nearly 8% of the isolates were Gram-positive and over 15% were unidentifiable. Notably, the bacterial strains collected from zooplankton were found to possess large number of hydrolytic enzymes compared to those strains collected either from water or krill. Based on these results, the functional role of bacterial enzymes in relation to trophodynamics of euphausiids and their role in the postharvest technology of krill is discussed Our understanding of bacterial processes in the Southern Ocean has radically changed over the last few decades. The contentions of earlier investigators were that bacteria would strongly be inhibited by low temperatures and that oxidation of dissolved organic matter would be extremely low. However, recent application of new enumeration and assay techniques in the Southern Ocean ecological studies has highlighted the presence of various, highly active and abundant bacterial communities in all the available ecological niches (Hanson et al., 1983) and microbial heterotrophy is now recognised as an important pathway of. Carbon and energy transfer (Hempel, 1985 Holm-Hansen, 1985 and Tanner, 1985). Although there can be no doubt that krill pervades the foodweb of the maritime Antarctic ecosystem, the trophic structure of marine communities in this system appears to be more complex (Hopkins, 1985 and Vincent, 1988) than earlier views would suggest. completed principalInvestigator National Centre for Polar and Ocean Research (NCPOR) 8322525515 voice Headland Sada, Vasco da Gama, Goa 403804 Vasco-da-Gama Goa 403804 IND ictd@ncpor.res.in Dr. N Ramaiah oceans 20.0 140.0 -90.0 30.0 1989-01-01 1990-12-31 Earth Science-Oceans Theme Antarctic Southern Ocean Place Production of Certain Hydrolytic Enzymes by Psychrophilic Bacteria from the Antarctic Krill Project eng TableDigital unknown unknown unknown distributor National Centre for Polar and Ocean Research (NCPOR) +91-832-2525515 voice Headland Sada, Vasco da Gama, Goa 403804 Vasco-da-Gama Goa 403804 IND vssamy@ncpor.res.in Mr. Sakthivel Samy V http://npdc.ncaor.gov.in/npdc/search_mf_data.action?search=freeText&expedition_type=all&parameter=MF1184815620&userType=user&freeTextValue=Production+of+Certain+Hydrolytic+Enzymes+by+Psychrophilic+Bacteria+from+the+Antarctic+Krill%2C+Zooplankton+and+Seawater.