Larval parasites found include the nematodes Cosmocephalus obvelatus (Creplin), Paracuaria adunca (Creplin) and Contracaecum sp.
Mummichogs in brackish EP91 and EP92, and freshwater MP91 were infected by the spirurid nematodes Cosmocephalus obvelatus and Paracuaria adunca, the anisakid nematode Contracaecum sp.
Cosmocephalus obvelatus was the most common of the three nematodes in EP91-92 mummichogs, whereas Paracuaria adunca was more common in mummichogs from MP91.
In all ponds ninespine sticklebacks were infected by Cosmocephalus obvelatus, Paracuaria [TABULAR DATA FOR TABLE 1 OMITTED] adunca, Contracaecum sp.
As in mummichogs, Cosmocephalus obvelatus was the most common nematode in ninespine sticklebacks in EP92.
On Sable Island, Cosmocephalus obvelatus, Paracuaria adunca, Contracaecum sp.
Cosmocephalus obvelatus, Paracuaria adunca, Neoechinorhynchus cylindratus and Thersitina gasterostei, were more common in brackish East Pond than in the freshwater ponds.
The temporal variation observed in Lily Pond was due to fluctuations in abundance of Cosmocephalus obvelatus.
For example, the parasites using benthic crustaceans as intermediate hosts, Cosmocephalus obvelatus, Paracuaria adunca and Neoechinorhynchus cylindratus (Ward, 1940; Anderson and Wong, 1982; Wong and Anderson, 1982; Marcogliese, 1992c), were more common in brackish EP91-92 than in freshwater MP91.
pungitii and Thersitina gasterostei, and possibly indirectly on Cosmocephalus obvelatus, Paracuaria adunca and Neoechinorhynchus cylindratus by influencing the species composition of the invertebrate fauna.