Endosymbiotic communities of two herbivorous labroid fishes, Odax cyanomelas and O. pullus

Clements, K.D. (1991) Endosymbiotic communities of two herbivorous labroid fishes, Odax cyanomelas and O. pullus. Marine Biology, 109 (2). pp. 223-229.

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Two herbivorous species of the temperate labroid fish family Odacidae were examined for the presence of gut endosymbionts. Odax cyanomelas (Richardson) from southern Australia and O. pullus Schneider from New Zealand both feed on macroalgae, yet appear to lack obvious morphological specializations for herbivory. Specimens of O. cyanomelas and O. pullus were collected in 1989 from Sydney, Australia, and Leigh, New Zealand, respectively. Both species were found to harbour dense concentrations of prokaryotic and eukaryotic microbes in their lower intestines. The various cell types present were examined by light microscopy, transmission electron microscopy and scanning electron microscopy. Epifluorescence microscope counts were used to quantify the distribution and abundance of the microbiota along the gut of O. cyanomelas. Major differences were observed in the composition of microbiota between the two species. O. cyanomelas contained spirilla, large rod-shaped bacteria, filamentous bacteria and two forms of trichomonad flagellates. O. pullus also harboured dense, large, rod-shaped bacterial populations, but lacked the other two large prokaryote categories found in O. cyanomelas, and contained diplomonad flagellates. The large rod-shaped bacteria found in both species resembled prokaryotes described from other herbivorous fish and termites.

Item ID: 33834
Item Type: Article (Research - C1)
ISSN: 1432-1793
Funders: James Cook University (JCU)
Date Deposited: 01 Jul 2014 06:31
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 100%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960808 Marine Flora, Fauna and Biodiversity @ 100%
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