Sures, Bernd; Knopf, Klaus; Taraschewski, Horst:

Development of Anguillicola crassus (Dracunculoidea, Anguillicolidae) in experimentally infected Balearic congers Ariosoma balearicum (Anguilloidea, Congridae).

In: Diseases of aquatic organisms : international journal., Jg. 39 (1999), S. 75-78
ISSN: 0177-5103
Zeitschriftenaufsatz / Fach: Biologie
The development of Anguillicola crassus in
experimentally infected Ariosoma balearicum (Anguilloidea,
Congridae) kept in seawater was studied in the laboratory. In
parallel trials the effect of water salinity on the development
of larval A. crassus in European eels Anguilla anguiUa was
also investigated using eels kept in seawater of a salinity of
34%. Both eel species were orally inoculated with Lj larvae of
A. crassus and then maintained for up to 3 mo at 18°C In
seawater. 110 d post infection, no adult but larval (Lj and L,)
stages of A. crassus were detected in the swimbladder wall of
Balearic congers, although this period of time was sufficient
for the parasites to develop to the adult stage in European
eel kept in seawater. The results presented suggest that the
definitive host specificity of A. crassus compnses species of
the family Angulllidae (i.e. the genus Anguilla), but not
members of the Congridae. Theoretically however, A. balearicum
might serve as a metaparatenic host. Factors determining
the definitive host range of A. crassus remain to be
elucidated. Water salinity does not seem to act as a factor
affecting definitive host specificity once the parasite has
become ingested by the eel.