Subtidal Hydroids (Cnidaria) of Northumberland Strait, Atlantic Canada, with Observations on Their Life Cycles and Distributions
Hydroids were examined in collections from a biological survey of Northumberland Strait undertaken by Fisheries and Oceans Canada from June to August 1975. No investigations have been undertaken previously on hydroids of the study area. Forty-eight species referable to 12 families were present in th...
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2003
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Online Access: | https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/824 https://doi.org/10.22621/cfn.v117i4.824 |
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ftjcfn:oai:canadianfieldnaturalist.ca:article/824 2023-05-15T17:35:09+02:00 Subtidal Hydroids (Cnidaria) of Northumberland Strait, Atlantic Canada, with Observations on Their Life Cycles and Distributions Calder, Dale R. 2003-10-01 application/pdf https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/824 https://doi.org/10.22621/cfn.v117i4.824 eng eng The Ottawa Field-Naturalists' Club https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/824/824 https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/824 doi:10.22621/cfn.v117i4.824 The Canadian Field-Naturalist; Vol. 117 No. 4 (2003); 555-564 0008-3550 hydroids Cnidaria Hydrozoa Northumberland Strait Prince Edward Island Nova Scotia New Brunswick Gulf of St. Lawrence reproduction zoogeography info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2003 ftjcfn https://doi.org/10.22621/cfn.v117i4.824 2021-09-02T18:54:08Z Hydroids were examined in collections from a biological survey of Northumberland Strait undertaken by Fisheries and Oceans Canada from June to August 1975. No investigations have been undertaken previously on hydroids of the study area. Forty-eight species referable to 12 families were present in the samples, with Sertulariidae dominating in both numbers of species (12) and frequency. Gonophores were found in 30 of the species. As usual in hydroids of higher latitudes, a majority of those represented do not have a medusa stage in their life cycle. Gonophores in 42 of the 48 species are known to be fixed sporosacs while free medusae or medusoids occur in only six. Two major species groups were distinguished in a numerical analysis of hydroid species/station data. One of these groups included the three most ubiquitous species (Calycella syringa, Hydrallmania falcata, Sertularia latiuscula) together with 15 others most prevalent in samples from shallower (<20 m) and warmer stations. The second group included species occurring primarily in samples from stations in deeper (>20 m) and mostly colder waters. Two species (Lafoeina tenuis, Halecium lankesteri) are new to the Atlantic coast of North America. Eight others (Bougainvillia sp., Eudendrium dispar, Eudendrium ramosum, Cuspidella humilis, Opercularella pumila, Halecium scutum, Halecium sessile, Diphasia fallax) are reported in the southwestern Gulf of St. Lawrence for the first time. The subtidal hydroid fauna in open waters of Northumberland Strait is a cold-water assemblage typical of the boreal zone in the western North Atlantic, and no relict warm-temperate species were found. Article in Journal/Newspaper North Atlantic Prince Edward Island The Canadian Field-Naturalist (E-Journal) Canada Medusa ENVELOPE(157.417,157.417,-79.633,-79.633) The Canadian Field-Naturalist 117 4 555 |
institution |
Open Polar |
collection |
The Canadian Field-Naturalist (E-Journal) |
op_collection_id |
ftjcfn |
language |
English |
topic |
hydroids Cnidaria Hydrozoa Northumberland Strait Prince Edward Island Nova Scotia New Brunswick Gulf of St. Lawrence reproduction zoogeography |
spellingShingle |
hydroids Cnidaria Hydrozoa Northumberland Strait Prince Edward Island Nova Scotia New Brunswick Gulf of St. Lawrence reproduction zoogeography Calder, Dale R. Subtidal Hydroids (Cnidaria) of Northumberland Strait, Atlantic Canada, with Observations on Their Life Cycles and Distributions |
topic_facet |
hydroids Cnidaria Hydrozoa Northumberland Strait Prince Edward Island Nova Scotia New Brunswick Gulf of St. Lawrence reproduction zoogeography |
description |
Hydroids were examined in collections from a biological survey of Northumberland Strait undertaken by Fisheries and Oceans Canada from June to August 1975. No investigations have been undertaken previously on hydroids of the study area. Forty-eight species referable to 12 families were present in the samples, with Sertulariidae dominating in both numbers of species (12) and frequency. Gonophores were found in 30 of the species. As usual in hydroids of higher latitudes, a majority of those represented do not have a medusa stage in their life cycle. Gonophores in 42 of the 48 species are known to be fixed sporosacs while free medusae or medusoids occur in only six. Two major species groups were distinguished in a numerical analysis of hydroid species/station data. One of these groups included the three most ubiquitous species (Calycella syringa, Hydrallmania falcata, Sertularia latiuscula) together with 15 others most prevalent in samples from shallower (<20 m) and warmer stations. The second group included species occurring primarily in samples from stations in deeper (>20 m) and mostly colder waters. Two species (Lafoeina tenuis, Halecium lankesteri) are new to the Atlantic coast of North America. Eight others (Bougainvillia sp., Eudendrium dispar, Eudendrium ramosum, Cuspidella humilis, Opercularella pumila, Halecium scutum, Halecium sessile, Diphasia fallax) are reported in the southwestern Gulf of St. Lawrence for the first time. The subtidal hydroid fauna in open waters of Northumberland Strait is a cold-water assemblage typical of the boreal zone in the western North Atlantic, and no relict warm-temperate species were found. |
format |
Article in Journal/Newspaper |
author |
Calder, Dale R. |
author_facet |
Calder, Dale R. |
author_sort |
Calder, Dale R. |
title |
Subtidal Hydroids (Cnidaria) of Northumberland Strait, Atlantic Canada, with Observations on Their Life Cycles and Distributions |
title_short |
Subtidal Hydroids (Cnidaria) of Northumberland Strait, Atlantic Canada, with Observations on Their Life Cycles and Distributions |
title_full |
Subtidal Hydroids (Cnidaria) of Northumberland Strait, Atlantic Canada, with Observations on Their Life Cycles and Distributions |
title_fullStr |
Subtidal Hydroids (Cnidaria) of Northumberland Strait, Atlantic Canada, with Observations on Their Life Cycles and Distributions |
title_full_unstemmed |
Subtidal Hydroids (Cnidaria) of Northumberland Strait, Atlantic Canada, with Observations on Their Life Cycles and Distributions |
title_sort |
subtidal hydroids (cnidaria) of northumberland strait, atlantic canada, with observations on their life cycles and distributions |
publisher |
The Ottawa Field-Naturalists' Club |
publishDate |
2003 |
url |
https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/824 https://doi.org/10.22621/cfn.v117i4.824 |
long_lat |
ENVELOPE(157.417,157.417,-79.633,-79.633) |
geographic |
Canada Medusa |
geographic_facet |
Canada Medusa |
genre |
North Atlantic Prince Edward Island |
genre_facet |
North Atlantic Prince Edward Island |
op_source |
The Canadian Field-Naturalist; Vol. 117 No. 4 (2003); 555-564 0008-3550 |
op_relation |
https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/824/824 https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/824 doi:10.22621/cfn.v117i4.824 |
op_doi |
https://doi.org/10.22621/cfn.v117i4.824 |
container_title |
The Canadian Field-Naturalist |
container_volume |
117 |
container_issue |
4 |
container_start_page |
555 |
_version_ |
1766134216644362240 |