Changes in bacterial flora during storage of selected aquaculture feed and feed ingredients.

Rajanna, M. R (2002) Changes in bacterial flora during storage of selected aquaculture feed and feed ingredients. Masters thesis, Central Institute of Fisheries Education.

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    Abstract

    The bacteriological changes in two shrimp feeds and three protein rich ingredients on short-term storage for 60 d was studied. Feed 1 w as a commercial shrimp 'grower' diet and Feed II was a cost effective diet for shrimp formulated at CMFRI, Kochi. The protein-rich feed ingredients used were fishmeal, groundnut oil cake and soybean flour. Sealed samples were stored under identical conditions at room temperature and were analysed for bacterial population at day 0. day 30 and day 60. The total plate count of feeds and feed ingredients was well within the reported non-degrading limit. G ram -positive cocci (42.8- 73 % ) were dominant in all the five samples. During storage gram -positive cocci showed slight reduction, while, gram-negative rods showed marginal increase. Five hundred isolates from feed and feed ingredients were used for further characterization and identification. The major genera identified were Micrococcus spp., Arthrobacter spp. and Bacillus spp. Besides enumeration of indicator bacteria such as Vibrio spp., faecal streptococci, Escherichia coli and Staphylococcus aureus were quantified in the feeds and feed ingredients. Feed II was devoid of all the above Indicator forms, except Vibrio spp., while, Feed I showed all the above groups in varying numbers. Short-term storage (up to 60 d ) d id not have much effect on bacterial load in feeds and feed Ingredients.

    Item Type: Thesis (Masters)
    Uncontrolled Keywords: Bacterial flora; Storage; Aquaculture feed; Feed ingredients
    Subjects: Dissertations
    Aquaculture > Aquafeed
    Food Chemistry
    Divisions: CMFRI-Kochi > Mariculture
    Subject Area > CMFRI > CMFRI-Kochi > Mariculture
    CMFRI-Kochi > Mariculture
    Subject Area > CMFRI-Kochi > Mariculture
    Depositing User: Users 17220 not found.
    Date Deposited: 17 Sep 2016 04:38
    Last Modified: 06 Oct 2016 10:44
    URI: http://eprints.cmfri.org.in/id/eprint/11111

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