Structure of an air-breathing organ and the swim bladder in the Alaska blackfish, Dallia pectoralis Bean
Specimens of the Alaska blackfish, Dallia pectoralis Bean, were examined for an air-breathing organ. The swim bladder is modified for gas secretion, with rete mirabile and gas gland. However, the swim bladder lacks epithelial capillaries, as found in the mudminnows (Umbra). Further examination of th...
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Language: | English |
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Canadian Science Publishing
1974
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Online Access: | http://dx.doi.org/10.1139/z74-162 http://www.nrcresearchpress.com/doi/pdf/10.1139/z74-162 |
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crcansciencepubl:10.1139/z74-162 2024-09-15T17:35:31+00:00 Structure of an air-breathing organ and the swim bladder in the Alaska blackfish, Dallia pectoralis Bean Crawford, R. H. 1974 http://dx.doi.org/10.1139/z74-162 http://www.nrcresearchpress.com/doi/pdf/10.1139/z74-162 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 52, issue 10, page 1221-1225 ISSN 0008-4301 1480-3283 journal-article 1974 crcansciencepubl https://doi.org/10.1139/z74-162 2024-07-25T04:10:07Z Specimens of the Alaska blackfish, Dallia pectoralis Bean, were examined for an air-breathing organ. The swim bladder is modified for gas secretion, with rete mirabile and gas gland. However, the swim bladder lacks epithelial capillaries, as found in the mudminnows (Umbra). Further examination of the digestive tract has shown that the oesophagus is modified as an accessory respiratory organ. There is a sphincter between the oesophagus and stomach. Blood supply is from a branch of the coeliac artery, and venous blood from the oesophagus enters the anterior sections of the postcardinal veins. The blood vessels extend to the oesophageal epithelium, with an extensive arrangement of epithelial capillaries in the respiratory section of the oesophagus. The muscularis externa of the oesophagus is well developed, consisting of an outer transverse layer of striated muscle and inner longitudinal muscle bundles. Article in Journal/Newspaper Alaska blackfish Dallia pectoralis Alaska Canadian Science Publishing Canadian Journal of Zoology 52 10 1221 1225 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Specimens of the Alaska blackfish, Dallia pectoralis Bean, were examined for an air-breathing organ. The swim bladder is modified for gas secretion, with rete mirabile and gas gland. However, the swim bladder lacks epithelial capillaries, as found in the mudminnows (Umbra). Further examination of the digestive tract has shown that the oesophagus is modified as an accessory respiratory organ. There is a sphincter between the oesophagus and stomach. Blood supply is from a branch of the coeliac artery, and venous blood from the oesophagus enters the anterior sections of the postcardinal veins. The blood vessels extend to the oesophageal epithelium, with an extensive arrangement of epithelial capillaries in the respiratory section of the oesophagus. The muscularis externa of the oesophagus is well developed, consisting of an outer transverse layer of striated muscle and inner longitudinal muscle bundles. |
format |
Article in Journal/Newspaper |
author |
Crawford, R. H. |
spellingShingle |
Crawford, R. H. Structure of an air-breathing organ and the swim bladder in the Alaska blackfish, Dallia pectoralis Bean |
author_facet |
Crawford, R. H. |
author_sort |
Crawford, R. H. |
title |
Structure of an air-breathing organ and the swim bladder in the Alaska blackfish, Dallia pectoralis Bean |
title_short |
Structure of an air-breathing organ and the swim bladder in the Alaska blackfish, Dallia pectoralis Bean |
title_full |
Structure of an air-breathing organ and the swim bladder in the Alaska blackfish, Dallia pectoralis Bean |
title_fullStr |
Structure of an air-breathing organ and the swim bladder in the Alaska blackfish, Dallia pectoralis Bean |
title_full_unstemmed |
Structure of an air-breathing organ and the swim bladder in the Alaska blackfish, Dallia pectoralis Bean |
title_sort |
structure of an air-breathing organ and the swim bladder in the alaska blackfish, dallia pectoralis bean |
publisher |
Canadian Science Publishing |
publishDate |
1974 |
url |
http://dx.doi.org/10.1139/z74-162 http://www.nrcresearchpress.com/doi/pdf/10.1139/z74-162 |
genre |
Alaska blackfish Dallia pectoralis Alaska |
genre_facet |
Alaska blackfish Dallia pectoralis Alaska |
op_source |
Canadian Journal of Zoology volume 52, issue 10, page 1221-1225 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z74-162 |
container_title |
Canadian Journal of Zoology |
container_volume |
52 |
container_issue |
10 |
container_start_page |
1221 |
op_container_end_page |
1225 |
_version_ |
1810464810858446848 |