Parasites of commercially important fish species from the southern Java coast, Indonesia, including the distribution pattern of trypanorhynch cestodes

Autor: Jacob, E.; Palm, Harry W.
In:

Verhandlungen der Gesellschaft für Ichthyologie

Bandangabe: 5
Gesamttitelundnr1: Parasites of commercially important fish species from the southern Java coast, Indonesia, including the distribution pattern of trypanorhynch cestodes
Seite: 165 - 191
Jahr: 2007

Einordung:
Institut: Professur Aquakultur und Sea-Ranching

Abstract:
A total of 118 commercially important fish species from the southern Java coast, Indonesia,
were studied for the parasite fauna. The fish belonged to the oceanic families Gempylidae
(Gempylus serpens, Thyrsitoides marleyi), Trichiuridae (Trichiurus lepturus) and Bramidae (Brama dussumieri).
In addition, a single specimen of the deep-sea fish species Alepisaurus ferox and the pelagic
Tylosurus crocodilus crocodilus were studied for comparison. A total of 38 parasite species was found,
and 23 new host records could be established. The most diverse component community was found
in T. lepturus and G. serpens with 17 and 16 species/taxa, respectively. The infracommunity was
highest in G. serpens and T. marleyi with a mean of 9.1 and 6.5 species. The cestode order Trypanorhyncha
recorded as extraintestinal larval stages was the most diverse taxon with 13 different
species, followed by the Crustacea (8), Nematoda (5), Digenea (5) and Acanthocephala (3). The
trypanorhynch Mixonybelinia lepturi was the parasite with the highest intensity of infestation, and
was recorded from G. serpens, T. marleyi, T. lepturus, B. dussumieri and A. ferox at a prevalence of 10-
100% and an intensity of 1-243. The host specificity of the tentaculariid trypanorhynchs was low,
with 4 species infesting 2 up to 5 of the studied host fish species. The overlapping infestation
pattern in fish from entirely different families underlines the low specificity of trypanorhynchs in
their second intermediate hosts, and their ability to infest various fishes without respect to their
host phylogeny. The helminths Nybelinia africana, Mixonybelinia lepturi, Tentacularia coryphaenae, Scolex
pleuronectis, Anisakis sp. and Gorgorhynchus cf. robertdollfusi are characteristic for the studied fish species
within the oceanic, into the deep-sea reaching environment along the tropical outer continental
shelf region off the Java coast. A high prevalence of infestation of 97-100% with the zoonotic
Anisakis sp. demonstrates a high risk of predatory fish to get infested. T. lepturus as an economically
important fish species within the region as well as other oceanic and pelagic fish from the southern
Java coast should be cooked well before consumption or deep frozen before further processing to
prevent any risk of the Anisakis-infection in humans, locally as well as on the international market.

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