The growth and emigration of Hystherothylacium aduncum in laboratory-reared herring larvae Clupea harengus was studied. Experimental infections of 36-day-old herring larvae resulted in 126 hosts infected with 306 H. aduncum larvae. Regression analyses showed a significant worm emigration from the rectum to the head of the fish, accompanied by an increase in worm body length. The emigration was independent of worm intensity, which suggests an ontogenetic process. Some worms departed from this pattern by moving posteriorly or by penetrating into the muscle, and in 5 cases, the larvae were observed to leave living fish. This individual variation has not been observed in previous studies and might be explained by host signals related to condition or development stage. Indirect evidence suggested parasite-induced mortality in the tanks due to the emigrations because only 4 of the 126 infected fish survived 8 days postinfection; the emigration of H. aduncum affected vital organs, such as the heart and brain, and the larvae penetrating or leaving the host's tissues can cause extensive damage to the delicate herring larvae.
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December 2000
LIFE CYCLES-SURVEY|
December 01 2000
GROWTH AND EMIGRATION OF THIRD-STAGE LARVAE OF HYSTEROTHYLACIUM ADUNCUM (NEMATODA: ANISAKIDAE) IN LARVAL HERRING CLUPEA HARENGUS Available to Purchase
Juan Antonio Balbuena;
Juan Antonio Balbuena
Marine Zoology Unit, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Paterna Campus, P.O. Box 22085, 46071 Valencia, Spain
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Egil Karlsbakk;
Egil Karlsbakk
Marine Zoology Unit, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Paterna Campus, P.O. Box 22085, 46071 Valencia, Spain
*Department of Fisheries and Marine Biology, Fish Diseases Group, University of Bergen, High Technology Center, 5020 Bergen, Norway.
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Anne Mette Kvenseth;
Anne Mette Kvenseth
Marine Zoology Unit, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Paterna Campus, P.O. Box 22085, 46071 Valencia, Spain
*Department of Fisheries and Marine Biology, Fish Diseases Group, University of Bergen, High Technology Center, 5020 Bergen, Norway.
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Monica Saksvik;
Monica Saksvik
Marine Zoology Unit, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Paterna Campus, P.O. Box 22085, 46071 Valencia, Spain
*Department of Fisheries and Marine Biology, Fish Diseases Group, University of Bergen, High Technology Center, 5020 Bergen, Norway.
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Are Nylund
Are Nylund
Marine Zoology Unit, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Paterna Campus, P.O. Box 22085, 46071 Valencia, Spain
*Department of Fisheries and Marine Biology, Fish Diseases Group, University of Bergen, High Technology Center, 5020 Bergen, Norway.
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J Parasitol (2000) 86 (6): 1271–1275.
Citation
Juan Antonio Balbuena, Egil Karlsbakk, Anne Mette Kvenseth, Monica Saksvik, Are Nylund; GROWTH AND EMIGRATION OF THIRD-STAGE LARVAE OF HYSTEROTHYLACIUM ADUNCUM (NEMATODA: ANISAKIDAE) IN LARVAL HERRING CLUPEA HARENGUS. J Parasitol 1 December 2000; 86 (6): 1271–1275. doi: https://doi.org/10.1645/0022-3395(2000)086[1271:GAEOTS]2.0.CO;2
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