Digestion of Herring by Indigenous Bacteria in the Minke Whale Forestomach
Northeastern Atlantic minke whales (Balaenoptera acutorostrata) have a multichambered stomach system which includes a nonglandular forestomach resembling that of ruminants. Bacteria from the forestomachs of herring-eating whales were enumerated and isolated in an anaerobic rumen-like culture medium...
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ftpubmed:oai:pubmedcentral.nih.gov:202004 2023-05-15T15:36:10+02:00 Digestion of Herring by Indigenous Bacteria in the Minke Whale Forestomach Olsen, Monica A. Aagnes, Tove H. Mathiesen, Svein D. 1994-12 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC202004 http://www.ncbi.nlm.nih.gov/pubmed/16349460 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC202004 http://www.ncbi.nlm.nih.gov/pubmed/16349460 Copyright © 1994, American Society for Microbiology General Microbial Ecology Text 1994 ftpubmed 2013-08-29T14:12:47Z Northeastern Atlantic minke whales (Balaenoptera acutorostrata) have a multichambered stomach system which includes a nonglandular forestomach resembling that of ruminants. Bacteria from the forestomachs of herring-eating whales were enumerated and isolated in an anaerobic rumen-like culture medium (M8W medium). The total viable population of anaerobic bacteria ranged from 73 × 107 to 145 × 108/ml of forestomach fluid (n = 4). Lactobacillus spp. (19.7%), Streptococcus spp. (35.9%), and Ruminococcus spp. (12.8%) were the most common of the bacterial strains (n = 117) isolated by use of M8W medium from the forestomach fluid population of two minke whales. Most of the isolates stained gram positive (93.2%), 62.4% were cocci, and all strains were strictly anaerobic. The population of lipolytic bacteria in one animal, enumerated by use of a selective lipid medium, constituted 89.7% of the viable population. The total viable population of anaerobic bacteria in freshly caught and homogenized herring (Clupea harengus) ranged from 56.7 to 95.0 cells per gram of homogenized prey (n = 3) when M8W medium was used. Pediococcus spp. (30.6%) and Aerococcus spp. (25.0%) were most common of the bacterial strains (n = 72) isolated from the homogenized herring. Most of the bacterial strains were gram positive (80.6%), and 70.8% were cocci. Unlike the forestomach bacterial population, as many as 61.1% of the strains from the herring were facultatively anaerobic. All bacterial strains isolated from the prey had phenotypic patterns different from those of strains isolated from the dominant bacterial population in the forestomach, indicating that the forestomach microbiota is indigenous. Scanning electron microscopic examinations revealed large numbers of bacteria, surrounded by a glycocalyx, attached to partly digested food particles in the forestomach. These data support the hypothesis that symbiotic microbial digestion occurs in the forestomach and that the bacteria are indigenous to minke whales. Text Balaenoptera acutorostrata minke whale PubMed Central (PMC) |
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language |
English |
topic |
General Microbial Ecology |
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General Microbial Ecology Olsen, Monica A. Aagnes, Tove H. Mathiesen, Svein D. Digestion of Herring by Indigenous Bacteria in the Minke Whale Forestomach |
topic_facet |
General Microbial Ecology |
description |
Northeastern Atlantic minke whales (Balaenoptera acutorostrata) have a multichambered stomach system which includes a nonglandular forestomach resembling that of ruminants. Bacteria from the forestomachs of herring-eating whales were enumerated and isolated in an anaerobic rumen-like culture medium (M8W medium). The total viable population of anaerobic bacteria ranged from 73 × 107 to 145 × 108/ml of forestomach fluid (n = 4). Lactobacillus spp. (19.7%), Streptococcus spp. (35.9%), and Ruminococcus spp. (12.8%) were the most common of the bacterial strains (n = 117) isolated by use of M8W medium from the forestomach fluid population of two minke whales. Most of the isolates stained gram positive (93.2%), 62.4% were cocci, and all strains were strictly anaerobic. The population of lipolytic bacteria in one animal, enumerated by use of a selective lipid medium, constituted 89.7% of the viable population. The total viable population of anaerobic bacteria in freshly caught and homogenized herring (Clupea harengus) ranged from 56.7 to 95.0 cells per gram of homogenized prey (n = 3) when M8W medium was used. Pediococcus spp. (30.6%) and Aerococcus spp. (25.0%) were most common of the bacterial strains (n = 72) isolated from the homogenized herring. Most of the bacterial strains were gram positive (80.6%), and 70.8% were cocci. Unlike the forestomach bacterial population, as many as 61.1% of the strains from the herring were facultatively anaerobic. All bacterial strains isolated from the prey had phenotypic patterns different from those of strains isolated from the dominant bacterial population in the forestomach, indicating that the forestomach microbiota is indigenous. Scanning electron microscopic examinations revealed large numbers of bacteria, surrounded by a glycocalyx, attached to partly digested food particles in the forestomach. These data support the hypothesis that symbiotic microbial digestion occurs in the forestomach and that the bacteria are indigenous to minke whales. |
format |
Text |
author |
Olsen, Monica A. Aagnes, Tove H. Mathiesen, Svein D. |
author_facet |
Olsen, Monica A. Aagnes, Tove H. Mathiesen, Svein D. |
author_sort |
Olsen, Monica A. |
title |
Digestion of Herring by Indigenous Bacteria in the Minke Whale Forestomach |
title_short |
Digestion of Herring by Indigenous Bacteria in the Minke Whale Forestomach |
title_full |
Digestion of Herring by Indigenous Bacteria in the Minke Whale Forestomach |
title_fullStr |
Digestion of Herring by Indigenous Bacteria in the Minke Whale Forestomach |
title_full_unstemmed |
Digestion of Herring by Indigenous Bacteria in the Minke Whale Forestomach |
title_sort |
digestion of herring by indigenous bacteria in the minke whale forestomach |
publishDate |
1994 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC202004 http://www.ncbi.nlm.nih.gov/pubmed/16349460 |
genre |
Balaenoptera acutorostrata minke whale |
genre_facet |
Balaenoptera acutorostrata minke whale |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC202004 http://www.ncbi.nlm.nih.gov/pubmed/16349460 |
op_rights |
Copyright © 1994, American Society for Microbiology |
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1766366505459515392 |