Ultrastructural distribution of morphology of the mammary gland with observations on the size fat droplets in milk of the Weddell seal Leptonychotes weddelli (Pinnipedia)
Ultrastructural observations were made of the non‐lactating and lactating mammary gland of the Weddell seal, and measurements of several cell components were compared with those in other species to determine whether there are any morphological modifications within the gland to explain the unusual mi...
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1983
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Online Access: | https://espace.library.uq.edu.au/view/UQ:406560 |
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:406560 2023-05-15T17:07:43+02:00 Ultrastructural distribution of morphology of the mammary gland with observations on the size fat droplets in milk of the Weddell seal Leptonychotes weddelli (Pinnipedia) Tedman R.A. 1983-01-01 https://espace.library.uq.edu.au/view/UQ:406560 eng eng Wiley doi:10.1111/j.1469-7998.1983.tb06113.x issn:1469-7998 Animal Science and Zoology Ecology Evolution Behavior and Systematics 1103 Clinical Sciences 1105 Dentistry Journal Article 1983 ftunivqespace https://doi.org/10.1111/j.1469-7998.1983.tb06113.x 2020-08-05T21:58:54Z Ultrastructural observations were made of the non‐lactating and lactating mammary gland of the Weddell seal, and measurements of several cell components were compared with those in other species to determine whether there are any morphological modifications within the gland to explain the unusual milk composition and very rapid growth of sucking young in this species. The mammary parenchyma in non‐lactating and lactating Weddell seals is almost identical morphologically to that found in other mammals. Although the relative volumes of most organelles are similar to those in other eutherians, the relative volume of rough endoplasmic reticulum (RER) is reduced in the Weddell seal. In addition, the absolute and relative volumes of Golgi vacuoles are smaller in the Weddell seal, probably associated with the low lactose and water content of the milk. The synthesis and secretion of milkspecific proteins and fat droplets by mammary secretory cells in the Weddell seal appear to be identical to other eutherians. Relatively small numbers of fat droplets less than 1 μm diameter are present in epithelial cells, alveolar lumina and milk samples, and there is a far greater contribution by large fat droplets to the total fat volume of Weddell seal milk than milk from other mammals. Copyright Article in Journal/Newspaper Leptonychotes weddelli Weddell Seal Weddell Seals The University of Queensland: UQ eSpace Weddell Journal of Zoology 200 1 131 141 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Animal Science and Zoology Ecology Evolution Behavior and Systematics 1103 Clinical Sciences 1105 Dentistry |
spellingShingle |
Animal Science and Zoology Ecology Evolution Behavior and Systematics 1103 Clinical Sciences 1105 Dentistry Tedman R.A. Ultrastructural distribution of morphology of the mammary gland with observations on the size fat droplets in milk of the Weddell seal Leptonychotes weddelli (Pinnipedia) |
topic_facet |
Animal Science and Zoology Ecology Evolution Behavior and Systematics 1103 Clinical Sciences 1105 Dentistry |
description |
Ultrastructural observations were made of the non‐lactating and lactating mammary gland of the Weddell seal, and measurements of several cell components were compared with those in other species to determine whether there are any morphological modifications within the gland to explain the unusual milk composition and very rapid growth of sucking young in this species. The mammary parenchyma in non‐lactating and lactating Weddell seals is almost identical morphologically to that found in other mammals. Although the relative volumes of most organelles are similar to those in other eutherians, the relative volume of rough endoplasmic reticulum (RER) is reduced in the Weddell seal. In addition, the absolute and relative volumes of Golgi vacuoles are smaller in the Weddell seal, probably associated with the low lactose and water content of the milk. The synthesis and secretion of milkspecific proteins and fat droplets by mammary secretory cells in the Weddell seal appear to be identical to other eutherians. Relatively small numbers of fat droplets less than 1 μm diameter are present in epithelial cells, alveolar lumina and milk samples, and there is a far greater contribution by large fat droplets to the total fat volume of Weddell seal milk than milk from other mammals. Copyright |
format |
Article in Journal/Newspaper |
author |
Tedman R.A. |
author_facet |
Tedman R.A. |
author_sort |
Tedman R.A. |
title |
Ultrastructural distribution of morphology of the mammary gland with observations on the size fat droplets in milk of the Weddell seal Leptonychotes weddelli (Pinnipedia) |
title_short |
Ultrastructural distribution of morphology of the mammary gland with observations on the size fat droplets in milk of the Weddell seal Leptonychotes weddelli (Pinnipedia) |
title_full |
Ultrastructural distribution of morphology of the mammary gland with observations on the size fat droplets in milk of the Weddell seal Leptonychotes weddelli (Pinnipedia) |
title_fullStr |
Ultrastructural distribution of morphology of the mammary gland with observations on the size fat droplets in milk of the Weddell seal Leptonychotes weddelli (Pinnipedia) |
title_full_unstemmed |
Ultrastructural distribution of morphology of the mammary gland with observations on the size fat droplets in milk of the Weddell seal Leptonychotes weddelli (Pinnipedia) |
title_sort |
ultrastructural distribution of morphology of the mammary gland with observations on the size fat droplets in milk of the weddell seal leptonychotes weddelli (pinnipedia) |
publisher |
Wiley |
publishDate |
1983 |
url |
https://espace.library.uq.edu.au/view/UQ:406560 |
geographic |
Weddell |
geographic_facet |
Weddell |
genre |
Leptonychotes weddelli Weddell Seal Weddell Seals |
genre_facet |
Leptonychotes weddelli Weddell Seal Weddell Seals |
op_relation |
doi:10.1111/j.1469-7998.1983.tb06113.x issn:1469-7998 |
op_doi |
https://doi.org/10.1111/j.1469-7998.1983.tb06113.x |
container_title |
Journal of Zoology |
container_volume |
200 |
container_issue |
1 |
container_start_page |
131 |
op_container_end_page |
141 |
_version_ |
1766063216268410880 |