The life-cycle of the flatfish nematode Cucullanus heterochrous
Abstract Mature specimens of Cucullanus heterochrous Rudolphi, 1802 (Nematoda: Cucullanidae) were obtained from the intestine of the flounder, Platichthys flesus , from Danish waters. Eggs embryonate in seawater but do not hatch. Fully developed larvae pressed out of eggs are 430 μm long with amphid...
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Online Access: | http://dx.doi.org/10.1017/s0022149x0070109x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022149X0070109X |
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crcambridgeupr:10.1017/s0022149x0070109x 2024-05-12T08:03:53+00:00 The life-cycle of the flatfish nematode Cucullanus heterochrous Køie, M. 2000 http://dx.doi.org/10.1017/s0022149x0070109x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022149X0070109X en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of Helminthology volume 74, issue 4, page 323-328 ISSN 0022-149X 1475-2697 Animal Science and Zoology General Medicine Parasitology journal-article 2000 crcambridgeupr https://doi.org/10.1017/s0022149x0070109x 2024-04-18T06:54:03Z Abstract Mature specimens of Cucullanus heterochrous Rudolphi, 1802 (Nematoda: Cucullanidae) were obtained from the intestine of the flounder, Platichthys flesus , from Danish waters. Eggs embryonate in seawater but do not hatch. Fully developed larvae pressed out of eggs are 430 μm long with amphids and dereids and enclosed within the cuticle of a previous larval stage. Infective larvae are believed to be in their third stage. Experimental studies showed that the polychaetes, Nereis spp., Scoloplos armiger , Brada villosa and Capitella sp., may act as intermediate hosts. In N. diversicolor the larvae increase their length to 1 mm within four weeks (15°C) without moulting. Experimental infections showed that larvated eggs are not infective to fish, whereas >550 μm long larvae from polychaetes survived in 4–24 cm long flounders and plaice, Pleuronectes platessa . Third-stage larvae 550 μm to 1.1 mm long were found in the submucosa of the intestine one week post infection. At a length of about 800 μm to 1.4 mm they moult to fourth-stage larvae. Fourth-stage larvae, immature and mature worms occur in the intestine and rectum. Fourth-stage larvae and adults survived experimental transfer from one flounder to another. Similar developmental stages survived for two weeks in the intestine of experimentally infected cod, Gadus morhua . Article in Journal/Newspaper Gadus morhua Cambridge University Press Journal of Helminthology 74 4 323 328 |
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Open Polar |
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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 Køie, M. The life-cycle of the flatfish nematode Cucullanus heterochrous |
topic_facet |
Animal Science and Zoology General Medicine Parasitology |
description |
Abstract Mature specimens of Cucullanus heterochrous Rudolphi, 1802 (Nematoda: Cucullanidae) were obtained from the intestine of the flounder, Platichthys flesus , from Danish waters. Eggs embryonate in seawater but do not hatch. Fully developed larvae pressed out of eggs are 430 μm long with amphids and dereids and enclosed within the cuticle of a previous larval stage. Infective larvae are believed to be in their third stage. Experimental studies showed that the polychaetes, Nereis spp., Scoloplos armiger , Brada villosa and Capitella sp., may act as intermediate hosts. In N. diversicolor the larvae increase their length to 1 mm within four weeks (15°C) without moulting. Experimental infections showed that larvated eggs are not infective to fish, whereas >550 μm long larvae from polychaetes survived in 4–24 cm long flounders and plaice, Pleuronectes platessa . Third-stage larvae 550 μm to 1.1 mm long were found in the submucosa of the intestine one week post infection. At a length of about 800 μm to 1.4 mm they moult to fourth-stage larvae. Fourth-stage larvae, immature and mature worms occur in the intestine and rectum. Fourth-stage larvae and adults survived experimental transfer from one flounder to another. Similar developmental stages survived for two weeks in the intestine of experimentally infected cod, Gadus morhua . |
format |
Article in Journal/Newspaper |
author |
Køie, M. |
author_facet |
Køie, M. |
author_sort |
Køie, M. |
title |
The life-cycle of the flatfish nematode Cucullanus heterochrous |
title_short |
The life-cycle of the flatfish nematode Cucullanus heterochrous |
title_full |
The life-cycle of the flatfish nematode Cucullanus heterochrous |
title_fullStr |
The life-cycle of the flatfish nematode Cucullanus heterochrous |
title_full_unstemmed |
The life-cycle of the flatfish nematode Cucullanus heterochrous |
title_sort |
life-cycle of the flatfish nematode cucullanus heterochrous |
publisher |
Cambridge University Press (CUP) |
publishDate |
2000 |
url |
http://dx.doi.org/10.1017/s0022149x0070109x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022149X0070109X |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Journal of Helminthology volume 74, issue 4, page 323-328 ISSN 0022-149X 1475-2697 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0022149x0070109x |
container_title |
Journal of Helminthology |
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74 |
container_issue |
4 |
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323 |
op_container_end_page |
328 |
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1798846018902556672 |