The kidney of Leptonychotes weddelli (Pinnipedia: Phocidae) with some observations on the kidneys of two other southern phocid seals
Abstract The structure of the kidney of Leptonychotes weddelli was examined using corrosion casts, India ink injection, and histological methods. Some observations were made on the kidney of the crabeater seal (Lobodon carcinophagus) and the elephant seal (Mirounga leonina) . The kidneys in all thre...
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crwiley:10.1002/jmor.1051670103 2024-06-23T07:52:13+00:00 The kidney of Leptonychotes weddelli (Pinnipedia: Phocidae) with some observations on the kidneys of two other southern phocid seals Vardy, P. H. Bryden, M. M. 1981 http://dx.doi.org/10.1002/jmor.1051670103 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjmor.1051670103 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jmor.1051670103 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Morphology volume 167, issue 1, page 13-34 ISSN 0362-2525 1097-4687 journal-article 1981 crwiley https://doi.org/10.1002/jmor.1051670103 2024-06-13T04:25:24Z Abstract The structure of the kidney of Leptonychotes weddelli was examined using corrosion casts, India ink injection, and histological methods. Some observations were made on the kidney of the crabeater seal (Lobodon carcinophagus) and the elephant seal (Mirounga leonina) . The kidneys in all three species are reniculate, as in many other marine mammalian species. Features that have not been described previously in a phocid seal are a peripyramidal muscle, and venous drainage characterized by a large extrinsic system and a small intrinsic system. Examination of specialized fornices, relative medullary thickness, and the volumes of juxtamedullary relative to peripheral glomeruli (all of which relate to urine concentrating ability) revealed that each reniculus of Leptonychotes is similar to the unilobar kidney of a small mammal that produces only moderately concentrated urine. The high glomerular volume to cortical volume ratio may be related to high glomerular filtration rates after feeding observed in marine mammals. It is concluded that reniculation is more likely to be related to the large size of most marine mammals than to some factor related directly to the marine environment. Article in Journal/Newspaper Crabeater Seal Elephant Seal Leptonychotes weddelli Lobodon carcinophagus Mirounga leonina Wiley Online Library Journal of Morphology 167 1 13 34 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The structure of the kidney of Leptonychotes weddelli was examined using corrosion casts, India ink injection, and histological methods. Some observations were made on the kidney of the crabeater seal (Lobodon carcinophagus) and the elephant seal (Mirounga leonina) . The kidneys in all three species are reniculate, as in many other marine mammalian species. Features that have not been described previously in a phocid seal are a peripyramidal muscle, and venous drainage characterized by a large extrinsic system and a small intrinsic system. Examination of specialized fornices, relative medullary thickness, and the volumes of juxtamedullary relative to peripheral glomeruli (all of which relate to urine concentrating ability) revealed that each reniculus of Leptonychotes is similar to the unilobar kidney of a small mammal that produces only moderately concentrated urine. The high glomerular volume to cortical volume ratio may be related to high glomerular filtration rates after feeding observed in marine mammals. It is concluded that reniculation is more likely to be related to the large size of most marine mammals than to some factor related directly to the marine environment. |
format |
Article in Journal/Newspaper |
author |
Vardy, P. H. Bryden, M. M. |
spellingShingle |
Vardy, P. H. Bryden, M. M. The kidney of Leptonychotes weddelli (Pinnipedia: Phocidae) with some observations on the kidneys of two other southern phocid seals |
author_facet |
Vardy, P. H. Bryden, M. M. |
author_sort |
Vardy, P. H. |
title |
The kidney of Leptonychotes weddelli (Pinnipedia: Phocidae) with some observations on the kidneys of two other southern phocid seals |
title_short |
The kidney of Leptonychotes weddelli (Pinnipedia: Phocidae) with some observations on the kidneys of two other southern phocid seals |
title_full |
The kidney of Leptonychotes weddelli (Pinnipedia: Phocidae) with some observations on the kidneys of two other southern phocid seals |
title_fullStr |
The kidney of Leptonychotes weddelli (Pinnipedia: Phocidae) with some observations on the kidneys of two other southern phocid seals |
title_full_unstemmed |
The kidney of Leptonychotes weddelli (Pinnipedia: Phocidae) with some observations on the kidneys of two other southern phocid seals |
title_sort |
kidney of leptonychotes weddelli (pinnipedia: phocidae) with some observations on the kidneys of two other southern phocid seals |
publisher |
Wiley |
publishDate |
1981 |
url |
http://dx.doi.org/10.1002/jmor.1051670103 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjmor.1051670103 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jmor.1051670103 |
genre |
Crabeater Seal Elephant Seal Leptonychotes weddelli Lobodon carcinophagus Mirounga leonina |
genre_facet |
Crabeater Seal Elephant Seal Leptonychotes weddelli Lobodon carcinophagus Mirounga leonina |
op_source |
Journal of Morphology volume 167, issue 1, page 13-34 ISSN 0362-2525 1097-4687 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jmor.1051670103 |
container_title |
Journal of Morphology |
container_volume |
167 |
container_issue |
1 |
container_start_page |
13 |
op_container_end_page |
34 |
_version_ |
1802643466160701440 |