Assimilation and deposition of wax esters in planktivorous seabirds
Abstract We have analyzed the lipid composition of meals fed to chicks and determined the ability of chicks to assimilate wax esters in four species of high latitude, plankton‐feeding seabirds: one alcid ( Aethia pusilla Alcidae: Charadriiformes) and three petrels ( Pelecanoides urinatrix, P. georgi...
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crwiley:10.1002/jez.1402380105 2024-06-02T08:12:49+00:00 Assimilation and deposition of wax esters in planktivorous seabirds Roby, Daniel D. Place, Allen R. Ricklefs, Robert E. 1986 http://dx.doi.org/10.1002/jez.1402380105 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjez.1402380105 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jez.1402380105 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Experimental Zoology volume 238, issue 1, page 29-41 ISSN 0022-104X 1097-010X journal-article 1986 crwiley https://doi.org/10.1002/jez.1402380105 2024-05-03T11:48:39Z Abstract We have analyzed the lipid composition of meals fed to chicks and determined the ability of chicks to assimilate wax esters in four species of high latitude, plankton‐feeding seabirds: one alcid ( Aethia pusilla Alcidae: Charadriiformes) and three petrels ( Pelecanoides urinatrix, P. georgicus , and Pachyptila desolata Procellariiformes). Up to 63% of the estimated digestible energy in chick meals consists of wax esters. Using 14 C‐labeled cetyl palmitate, we have shown that chicks of the four study species efficiently hydrolyze wax esters, with less than 1% of the ingested label excreted in most cases. Labeled fatty acids were assimilated and deposited primarily as triacylglycerols in storage fat depots. The one study species known to store lipids in the proventriculus retained much of the labeled wax ester unhydrolyzed in stomach oils. However, the capacity to store stomach oils was not a requisite for efficient assimilation of wax esters. This study provides the first direct evidence that seabirds have the inherent ability to digest and assimilate wax esters efficiently. Article in Journal/Newspaper Pachyptila desolata Wiley Online Library Journal of Experimental Zoology 238 1 29 41 |
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Wiley Online Library |
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language |
English |
description |
Abstract We have analyzed the lipid composition of meals fed to chicks and determined the ability of chicks to assimilate wax esters in four species of high latitude, plankton‐feeding seabirds: one alcid ( Aethia pusilla Alcidae: Charadriiformes) and three petrels ( Pelecanoides urinatrix, P. georgicus , and Pachyptila desolata Procellariiformes). Up to 63% of the estimated digestible energy in chick meals consists of wax esters. Using 14 C‐labeled cetyl palmitate, we have shown that chicks of the four study species efficiently hydrolyze wax esters, with less than 1% of the ingested label excreted in most cases. Labeled fatty acids were assimilated and deposited primarily as triacylglycerols in storage fat depots. The one study species known to store lipids in the proventriculus retained much of the labeled wax ester unhydrolyzed in stomach oils. However, the capacity to store stomach oils was not a requisite for efficient assimilation of wax esters. This study provides the first direct evidence that seabirds have the inherent ability to digest and assimilate wax esters efficiently. |
format |
Article in Journal/Newspaper |
author |
Roby, Daniel D. Place, Allen R. Ricklefs, Robert E. |
spellingShingle |
Roby, Daniel D. Place, Allen R. Ricklefs, Robert E. Assimilation and deposition of wax esters in planktivorous seabirds |
author_facet |
Roby, Daniel D. Place, Allen R. Ricklefs, Robert E. |
author_sort |
Roby, Daniel D. |
title |
Assimilation and deposition of wax esters in planktivorous seabirds |
title_short |
Assimilation and deposition of wax esters in planktivorous seabirds |
title_full |
Assimilation and deposition of wax esters in planktivorous seabirds |
title_fullStr |
Assimilation and deposition of wax esters in planktivorous seabirds |
title_full_unstemmed |
Assimilation and deposition of wax esters in planktivorous seabirds |
title_sort |
assimilation and deposition of wax esters in planktivorous seabirds |
publisher |
Wiley |
publishDate |
1986 |
url |
http://dx.doi.org/10.1002/jez.1402380105 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjez.1402380105 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jez.1402380105 |
genre |
Pachyptila desolata |
genre_facet |
Pachyptila desolata |
op_source |
Journal of Experimental Zoology volume 238, issue 1, page 29-41 ISSN 0022-104X 1097-010X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jez.1402380105 |
container_title |
Journal of Experimental Zoology |
container_volume |
238 |
container_issue |
1 |
container_start_page |
29 |
op_container_end_page |
41 |
_version_ |
1800759388565143552 |