Observations on the life-cycle of the strigeoid trematode, Apatemon (Apatemon) gracilis (Rudolphi, 1819) Szidat, 1928

Abstract The life-cycle of Apatemon (A.) gracilis was completed in the laboratory. The snail host is Lymnaeaperegra (Müller). The cercaria is redescribed from a wide range of material. Metacercariae were found in naturally infected rainbow trout ( Salmo gairdneri Richardson), three-spined sticklebac...

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Published in:Journal of Helminthology
Main Author: Blair, David
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 1976
Subjects:
Online Access:http://dx.doi.org/10.1017/s0022149x00027607
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022149X00027607
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spelling crcambridgeupr:10.1017/s0022149x00027607 2024-05-12T08:05:54+00:00 Observations on the life-cycle of the strigeoid trematode, Apatemon (Apatemon) gracilis (Rudolphi, 1819) Szidat, 1928 Blair, David 1976 http://dx.doi.org/10.1017/s0022149x00027607 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022149X00027607 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of Helminthology volume 50, issue 2, page 125-132 ISSN 0022-149X 1475-2697 Animal Science and Zoology General Medicine Parasitology journal-article 1976 crcambridgeupr https://doi.org/10.1017/s0022149x00027607 2024-04-18T06:54:10Z Abstract The life-cycle of Apatemon (A.) gracilis was completed in the laboratory. The snail host is Lymnaeaperegra (Müller). The cercaria is redescribed from a wide range of material. Metacercariae were found in naturally infected rainbow trout ( Salmo gairdneri Richardson), three-spined sticklebacks ( Gasterosteus aculeatiis L.) and stone loach ( Nemacheilus barbatulus (L.)) from Scotland and in three-spined sticklebacks from Iceland. In trout, most metacercariae were found in the pericardial cavity, in sticklebacks, the eye, and in loach, the body cavity. In infection experiments, cercariae from naturally infected Scottish snails developed in threespined sticklebacks, rainbow trout and brown trout ( Salmo trutta L.). Under experimental conditions cercariae did not penetrate stone loach, although this species is naturally infected with A gracilis . The phenomenon of fish host specificity is briefly discussed. Development of the metacercaria is described. Excystation of metacercarial cysts with pepsin and trypsin solutions is unlike that reported for any other digenean; the contents of the cyst appear to be under pressure. In pepsin, layers of the cyst wall peel back from one end. When transferred to trypsin, one pole of the cyst ruptures and the worm is forcibly expelled. Article in Journal/Newspaper Iceland Cambridge University Press Journal of Helminthology 50 2 125 132
institution Open Polar
collection Cambridge University Press
op_collection_id crcambridgeupr
language English
topic Animal Science and Zoology
General Medicine
Parasitology
spellingShingle Animal Science and Zoology
General Medicine
Parasitology
Blair, David
Observations on the life-cycle of the strigeoid trematode, Apatemon (Apatemon) gracilis (Rudolphi, 1819) Szidat, 1928
topic_facet Animal Science and Zoology
General Medicine
Parasitology
description Abstract The life-cycle of Apatemon (A.) gracilis was completed in the laboratory. The snail host is Lymnaeaperegra (Müller). The cercaria is redescribed from a wide range of material. Metacercariae were found in naturally infected rainbow trout ( Salmo gairdneri Richardson), three-spined sticklebacks ( Gasterosteus aculeatiis L.) and stone loach ( Nemacheilus barbatulus (L.)) from Scotland and in three-spined sticklebacks from Iceland. In trout, most metacercariae were found in the pericardial cavity, in sticklebacks, the eye, and in loach, the body cavity. In infection experiments, cercariae from naturally infected Scottish snails developed in threespined sticklebacks, rainbow trout and brown trout ( Salmo trutta L.). Under experimental conditions cercariae did not penetrate stone loach, although this species is naturally infected with A gracilis . The phenomenon of fish host specificity is briefly discussed. Development of the metacercaria is described. Excystation of metacercarial cysts with pepsin and trypsin solutions is unlike that reported for any other digenean; the contents of the cyst appear to be under pressure. In pepsin, layers of the cyst wall peel back from one end. When transferred to trypsin, one pole of the cyst ruptures and the worm is forcibly expelled.
format Article in Journal/Newspaper
author Blair, David
author_facet Blair, David
author_sort Blair, David
title Observations on the life-cycle of the strigeoid trematode, Apatemon (Apatemon) gracilis (Rudolphi, 1819) Szidat, 1928
title_short Observations on the life-cycle of the strigeoid trematode, Apatemon (Apatemon) gracilis (Rudolphi, 1819) Szidat, 1928
title_full Observations on the life-cycle of the strigeoid trematode, Apatemon (Apatemon) gracilis (Rudolphi, 1819) Szidat, 1928
title_fullStr Observations on the life-cycle of the strigeoid trematode, Apatemon (Apatemon) gracilis (Rudolphi, 1819) Szidat, 1928
title_full_unstemmed Observations on the life-cycle of the strigeoid trematode, Apatemon (Apatemon) gracilis (Rudolphi, 1819) Szidat, 1928
title_sort observations on the life-cycle of the strigeoid trematode, apatemon (apatemon) gracilis (rudolphi, 1819) szidat, 1928
publisher Cambridge University Press (CUP)
publishDate 1976
url http://dx.doi.org/10.1017/s0022149x00027607
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022149X00027607
genre Iceland
genre_facet Iceland
op_source Journal of Helminthology
volume 50, issue 2, page 125-132
ISSN 0022-149X 1475-2697
op_rights https://www.cambridge.org/core/terms
op_doi https://doi.org/10.1017/s0022149x00027607
container_title Journal of Helminthology
container_volume 50
container_issue 2
container_start_page 125
op_container_end_page 132
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