Production of Certain Hydrolytic Enzymes by Psychrophilic Bacteria from the Antarctic Krill, Zooplankton and Seawater.

Access URI: 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.

Brief Description (Abstract):

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

Status: Completed

Purpose: 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.

Presentation Format: Documentdigital

Distribution Format: unknown

Distribution Format Version: unknown

Supplemental Information:

TableDigital

Keyword(s): Earth Science-Oceans,

Place/Location(s): Antarctic, Southern Ocean,

Project: Production of Certain Hydrolytic Enzymes by Psychrophilic Bacteria from the Antarctic Krill,

Topic Category(s): Oceans,

Date(s): 2020-09-09 (Creation),

Resource Contact(s):
1. Name : Dr. N Ramaiah
    Role : PrincipalInvestigator
    Phone : 8322525515
    E-Mail : ictd [ at ] ncpor.res.in
    Organization Name : National Centre for Polar and Ocean Research (NCPOR)
    Address : Headland Sada, Vasco da Gama, Goa 403804
    City : Vasco-da-Gama
    State : Goa
    Postal Code : 403804
    Country : IND

Distributor Contact(s):
1. Name : Mr. Sakthivel Samy V
    Role : Distributor
    Phone : +91-832-2525515
    E-Mail : vssamy [ at ] ncpor.res.in
    Organization Name : National Centre for Polar and Ocean Research (NCPOR)
    Address : Headland Sada, Vasco da Gama, Goa 403804
    City : Vasco-da-Gama
    State : Goa
    Postal Code : 403804
    Country : IND

Metadata Contact(s):
1. Name : Mr. Sakthivel Samy V
    Role : PointOfContact
    Phone : +91-832-2525515
    E-Mail : vssamy [ at ] ncpor.res.in
    Organization Name : National Centre for Polar and Ocean Research (NCPOR)
    Address : Headland Sada, Vasco da Gama, Goa 403804
    City : Vasco-da-Gama
    State : Goa
    Postal Code : 403804
    Country : IND

Extent:
Start Date : 1989-01-01
End Date   : 1990-12-31