Some ectoparasitic trichodinids from Atlantic cod, Gadus morhua L., with a description of Trichodina cooperi n.sp.
Trichodina murmanica Polyanskiy, 1955 (= Trichodina domerguei subsp. saintjohnsi Lom and Laird, 1969) and Trichodina cooperi n.sp. were commonly encountered on skin and fins of Atlantic cod, Gadus morhua L., near Halifax, Nova Scotia, Canada. A third species of Trichodina, probably new, was recorded...
Published in: | Canadian Journal of Zoology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Canadian Science Publishing
1989
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Online Access: | http://dx.doi.org/10.1139/z89-256 http://www.nrcresearchpress.com/doi/pdf/10.1139/z89-256 |
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crcansciencepubl:10.1139/z89-256 2024-06-23T07:51:04+00:00 Some ectoparasitic trichodinids from Atlantic cod, Gadus morhua L., with a description of Trichodina cooperi n.sp. Poynton, S. L. Lom, J. 1989 http://dx.doi.org/10.1139/z89-256 http://www.nrcresearchpress.com/doi/pdf/10.1139/z89-256 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 67, issue 7, page 1793-1800 ISSN 0008-4301 1480-3283 journal-article 1989 crcansciencepubl https://doi.org/10.1139/z89-256 2024-05-24T13:05:54Z Trichodina murmanica Polyanskiy, 1955 (= Trichodina domerguei subsp. saintjohnsi Lom and Laird, 1969) and Trichodina cooperi n.sp. were commonly encountered on skin and fins of Atlantic cod, Gadus morhua L., near Halifax, Nova Scotia, Canada. A third species of Trichodina, probably new, was recorded from the skin of one fish. This is believed to be the first report of the genus Trichodina from the body surface of gadoid fish from eastern Canada, and the known geographic range of T. murmanica is extended. Trichodina cooperi n.sp. has an adoral ciliary spiral of 370–380° and is relatively large, the mean diameter of the body is 110 μm, of the adhesive disc (with dark center), 95 μm, and of the denticulate ring, 59 μm. The denticulate ring consists of 24–29 denticles (usually 27), with 7–9 radial pins per denticle. Each denticle has a broad blade, a large central part, and a slightly curved thorn of moderate to broad width, with a central rib when mature. The thorn is approximately twice the length of the blade. The horseshoe-shaped macronucleus has a diameter of 80.0 μm and the micronucleus is in the +y position. Trichodina spp. infected 26% of 39 wild fish 20 to < 60 cm long. Most wild fish yielded less than five ciliates per 24 × 50 mm smear. Article in Journal/Newspaper atlantic cod Gadus morhua Canadian Science Publishing Canada Laird ENVELOPE(162.450,162.450,-81.683,-81.683) The ''Y'' ENVELOPE(-112.453,-112.453,57.591,57.591) Canadian Journal of Zoology 67 7 1793 1800 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Trichodina murmanica Polyanskiy, 1955 (= Trichodina domerguei subsp. saintjohnsi Lom and Laird, 1969) and Trichodina cooperi n.sp. were commonly encountered on skin and fins of Atlantic cod, Gadus morhua L., near Halifax, Nova Scotia, Canada. A third species of Trichodina, probably new, was recorded from the skin of one fish. This is believed to be the first report of the genus Trichodina from the body surface of gadoid fish from eastern Canada, and the known geographic range of T. murmanica is extended. Trichodina cooperi n.sp. has an adoral ciliary spiral of 370–380° and is relatively large, the mean diameter of the body is 110 μm, of the adhesive disc (with dark center), 95 μm, and of the denticulate ring, 59 μm. The denticulate ring consists of 24–29 denticles (usually 27), with 7–9 radial pins per denticle. Each denticle has a broad blade, a large central part, and a slightly curved thorn of moderate to broad width, with a central rib when mature. The thorn is approximately twice the length of the blade. The horseshoe-shaped macronucleus has a diameter of 80.0 μm and the micronucleus is in the +y position. Trichodina spp. infected 26% of 39 wild fish 20 to < 60 cm long. Most wild fish yielded less than five ciliates per 24 × 50 mm smear. |
format |
Article in Journal/Newspaper |
author |
Poynton, S. L. Lom, J. |
spellingShingle |
Poynton, S. L. Lom, J. Some ectoparasitic trichodinids from Atlantic cod, Gadus morhua L., with a description of Trichodina cooperi n.sp. |
author_facet |
Poynton, S. L. Lom, J. |
author_sort |
Poynton, S. L. |
title |
Some ectoparasitic trichodinids from Atlantic cod, Gadus morhua L., with a description of Trichodina cooperi n.sp. |
title_short |
Some ectoparasitic trichodinids from Atlantic cod, Gadus morhua L., with a description of Trichodina cooperi n.sp. |
title_full |
Some ectoparasitic trichodinids from Atlantic cod, Gadus morhua L., with a description of Trichodina cooperi n.sp. |
title_fullStr |
Some ectoparasitic trichodinids from Atlantic cod, Gadus morhua L., with a description of Trichodina cooperi n.sp. |
title_full_unstemmed |
Some ectoparasitic trichodinids from Atlantic cod, Gadus morhua L., with a description of Trichodina cooperi n.sp. |
title_sort |
some ectoparasitic trichodinids from atlantic cod, gadus morhua l., with a description of trichodina cooperi n.sp. |
publisher |
Canadian Science Publishing |
publishDate |
1989 |
url |
http://dx.doi.org/10.1139/z89-256 http://www.nrcresearchpress.com/doi/pdf/10.1139/z89-256 |
long_lat |
ENVELOPE(162.450,162.450,-81.683,-81.683) ENVELOPE(-112.453,-112.453,57.591,57.591) |
geographic |
Canada Laird The ''Y'' |
geographic_facet |
Canada Laird The ''Y'' |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Canadian Journal of Zoology volume 67, issue 7, page 1793-1800 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z89-256 |
container_title |
Canadian Journal of Zoology |
container_volume |
67 |
container_issue |
7 |
container_start_page |
1793 |
op_container_end_page |
1800 |
_version_ |
1802642059834687488 |