Bacterial microflora in the gastro-intestinal tract of Dover sole (Solea solea L.), with emphasis on the possible role of bacteria in the nutrition of the host

N. L. MacDonald, J. R. Stark, B. Austin

    Research output: Contribution to journalArticle

    Abstract

    There was a progressive increase in the size of the aerobic heterotrophic bacterial populations along the gastro-intestinal tract of farmed Dover sole. Moreover, higher counts were recorded in juvenile than in adult animals. Thus, in juvenile fish, 5.2 x 105, 8.0 x 105 and 9.8 x 106 aerobic heterotrophs/g were recovered from the stomach/foregut, midgut and hindgut/rectum, respectively. In adult fish, comparative samples revealed the presence of only 3.0 x 104, 7.0 x 104 and 2.3 x 105 bacteria/g, respectively. These bacteria were equated with Acinetobacter, Alcaligenes, Enterobacteriaceae representatives, Flavobacterium, Micrococcus, Photobacterium, Staphylococcus and Vibrio. Of the compounds tested, many isolates, particularly those recovered from the hindgut/rectum, degraded p-nitrophenyl-ß-N-acetylglucosamide, chitin and collagen. Consequently, it is likely that such organisms may contribute to nutritional processes within Dover sole.

    Original languageEnglish
    Pages (from-to)107-111
    Number of pages5
    JournalFEMS Microbiology Letters
    Volume35
    Issue number1
    Publication statusPublished - 1986

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