Parasites of the grouper fish Epinephelus coioides (Serranidae) as potential environmental indicators in Indonesian coastal ecosystems

Autor: Kleinertz, Sonja; Palm, Harry W. 2015
In:

Journal of Helminthology

Bandangabe: 89
ISBN: 1475-2697
DOI: doi:10.1017/S0022149X1300062X
Seite: 86 - 99
Jahr: 2015

Einordung:
Institut: Professur Aquakultur und Sea-Ranching

Abstract:
A total of 195 Epinephelus coioides (Hamilton, 1822) were studied for fish
parasites from Javanese (Segara Anakan lagoon) and Balinese waters. Up to 25
different parasite species belonging to the following taxa: one Ciliata, one
Microsporea, five Digenea, one Monogenea, four Cestoda, four Nematoda, one
Acanthocephala, one Hirudinea and seven Crustacea were identified with four
new host and locality records. The dominant parasites included the monogenean
Pseudorhabdosynochus lantauensis (53.3–97.1%), the nematode Spirophilometra
endangae (23.3–42.9%), the digenean Didymodiclinus sp. (2.9–40.0%), the
nematodes Philometra sp. (22.6–34.3%) and Raphidascaris sp. (2.9–28.6%), and
the isopod Alcirona sp. (6.7–31.4%). Regional differences for E. coioides were
found in terms of endoparasite diversity, total diversity according to Shannon–
Wiener, Simpson index and Evenness. A comparison with published data from
Sumatera revealed highest endoparasite diversity (Shannon–Wiener: 1.86/1.67–
2.04) and lowest ectoparasite/endoparasite ratio (0.73/0.57–0.88) off the
Balinese coast, followed by Lampung Bay, Sumatera (1.84; 0.67), off the coast
of Segara Anakan lagoon (1.71; 0.71), and in the lagoon (0.30/0.19–0.66;
0.85/0.67–1.00). The presented data demonstrate the natural range of these
parameters and parasite prevalences according to habitat and region, allowing
adjustment of the scale that has been used in the visual integration of the parasite
parameters into a star graph. The parasite fauna of E. coioides in Segara Anakan
lagoon ‘improved’ from 2004 until 2008/09, possibly related to earlier oil spill
events in 2002 and 2004. The use of grouper fish parasites as an early warning
system for environmental change in Indonesian coastal ecosystems is discussed.

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