Microbial Diversity and Parasitic Load in Tropical Fish of Different Environmental Conditions

Autor:
Hennersdorf, P.; Kleinertz, S.; Theisen, S.; Abdul-Aziz, M.A.; Mrotzek, G.; Palm, H.W.; Saluz, H.P.
In:

PLOS One

Bandangabe: 11
Auflage: 3
Ergaenzung: e0151594
ISBN: 1932-6203
DOI: DOI:10.1371/journal.pone.0151594
Seite: 1 - 18
Jahr: 2016

Einordung:
Institut: Professur Aquakultur und Sea-Ranching

Abstract:
In this study we analysed fecal bacterial communities and parasites of three important Indonesian
fish species, Epinephelus fuscoguttatus, Epinephelus sexfasciatus and Atule mate.
We then compared the biodiversity of bacterial communities and parasites of these three
fish species collected in highly polluted Jakarta Bay with those collected in less polluted
Indonesian areas of Cilacap (E. sexfasciatus, A. mate) and Thousand Islands (E. fuscoguttatus).
In addition, E. fuscoguttatus from net cages in an open water mariculture facility was
compared with free living E. fuscoguttatus from its surroundings. Both core and shared
microbiomes were investigated. Our results reveal that, while the core microbiomes of all
three fish species were composed of fairly the same classes of bacteria, the proportions of
these bacterial classes strongly varied. The microbial composition of phylogenetically distant
fish species, i.e. A. mate and E. sexfasciatus from Jakarta Bay and Cilacap were more
closely related than the microbial composition of more phylogentically closer species, i.e. E.
fuscoguttatus, E. sexfasciatus from Jakarta Bay, Cilacap and Thousand Islands. In addition,
we detected a weak negative correlation between the load of selected bacterial pathogens,
i.e. Vibrio sp. and Photobacterium sp. and the number of endoparasites. In the case of Flavobacterium
sp. the opposite was observed, i.e. a weak positive correlation. Of the three
recorded pathogenic bacterial genera, Vibrio sp. was commonly found in E. fuscoguttatus from mariculture, and lessly in the vicinity of the net cages and rarely in the fishes from the
heavily polluted waters from Jakarta Bay. Flavobacterium sp. showed higher counts in mariculture
fish and Photobacteria sp. was the most prominent in fish inside and close to the net
cages.

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Letzte Änderung des Eintrages: 27.01.2017

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