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Transmission of Cryptocotyle lingua cercariae in natural environments: a field experiment

1998; Wiley; Volume: 53; Issue: 4 Linguagem: Inglês

10.1111/j.1095-8649.1998.tb01840.x

1095-8649

Dag Atle Lysne, A. Skorping And, Willy Hemmingsen,

Parasites and Host Interactions

Atlantic cod were kept at two different depths in three cages placed at increasing distance from a rocky shore where natural infections of the digenean Cryptocotyle lingua occurred in the snail Littorina littorea . During a 6‐month period the fish kept at 0–2 m accumulated significantly more parasites than those kept at 2–4 m. Distance from the shore did not affect infection rates. We conclude that host location behaviour of cercariae influences the infection pattern under natural conditions, and that transmission from snail to fish can take place over large areas of coastal waters.