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In situ growth of juvenile cockles, Cerastoderma edule, experimentally infected with larval trematodes (Himasthla interrupta) Wegeberg, A.M.; Jensen, K.T. (2003). In situ growth of juvenile cockles, Cerastoderma edule, experimentally infected with larval trematodes (Himasthla interrupta). J. Sea Res. 50(1): 37-43. http://dx.doi.org/10.1016/s1385-1101(03)00042-x In: Journal of Sea Research. Elsevier/Netherlands Institute for Sea Research: Amsterdam; Den Burg. ISSN 1385-1101; e-ISSN 1873-1414, meer

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Beschikbaar in	Auteurs
VLIZ: Open access 56730 [ download pdf ]

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Trefwoorden

ANE, Wadden Sea Availability > Food availability Body conditions Denmark Developmental stages > Juveniles Environmental conditions Interspecific relationships Parasites Parasites > Endoparasites Population functions > Growth Survival Cerastoderma edule (Linnaeus, 1758) [WoRMS]; Himasthla interrupta Loos-Frank, 1967 [WoRMS] Denmark [Marine Regions]; Waddenzee [Marine Regions] Marien/Kust

Author keywords

Cerastoderma edule; field experiment; growth; Himasthla interrupta;Metacercariae; Trematoda

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Auteurs		Top
Wegeberg, A.M. Jensen, K.T.

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Abstract

To examine the influence of larval trematodes (metacercariae) on survivorship and growth of bivalves, juvenile cockles were experimentally infected with Himasthla interrupta and afterwards deployed in enclosures on an intertidal flat at two different tidal levels for one month. The hypothesis is that the impact of such metacercariae varies with food availability and environmental conditions. The experimental cockles exhibited significantly different growth rates at the two study sites, but there was no discernible impact of the metacercariae on survivorship and shell-growth. Body condition, however, differed among infected and non-infected cockles at the site with the shortest immersion time. Both the experimentally infected and non-infected cockles lost body condition during their incubation in the laboratory because of starvation. Infected cockles, however, lost more flesh weight than the non-infected, and this difference was maintained for high-shore cockles during the in situ experiment, whereas both infected and non-infected low-shore cockles (living under more optimal food conditions) had regained their pre-experimental body condition. In conclusion, it seems that Himasthla interrupta metacercariae are non-exploitative and relatively harmless under moderate infection intensities and normal environmental conditions.

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