Dekker, Willem
- Rijksinstituut voor Visserijonderzoek (RIVO)
Sammanfattning
Dutch wild eels [Anguilla anguilla (L.)] and smelt [ Osmerus eperlanus (L.)] from freshwater and saltwater areas in the Netherlands were collected from 1986 to 1992 and their swimbladders were examined for Anguil/icola crassu.o; (Nematoda, Dracunculoidea) and for parasite-related pathological changes. Throughout the 6-year sampling period, young eels (up to 17 cm) showed severe pathological changes due to the parasite. The prevalence of Infection in larger eels (23-34 cm) showed the highest prevalence between 1987 and 1988, and the highest intensity (i.e. number of parasites per infected fish) between 1988-1989. After 1989 the prevalence of the parasite decreased, and the lesions became less severe. Larger eels (23-34 cm) from the Waddenzee (salt water), which is close to the !Jsselmeer, showed a high prevalence of the parasite from 1987 to 1990, although the intensity of infection decreased from 1987 onwards, as did the percentage of fibrotic swimbladders after 1988. Smel~ which is a paratenic host for larvae of A. crassu.o; and which is a prey for large eels, showed a sharp decrease In prevalence of the parasite shortly after 1988. Thereafter the prevalence stayed rather constant at about 40% of the smelt population. No pathological changes were found in the smelt.
Publicerad i
Aquaculture
1994, volym: 126, nummer: 3-4, sidor: 219-229
SLU författare
UKÄ forskningsämne
Fisk- och akvakulturforskning
Publikationens identifierare
- DOI: https://doi.org/10.1016/0044-8486(94)90038-8
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/40572