Regurgitation of the koilin layer in chinstrap penguins (Pygoscelis antarcticus) and its association with gastric parasites
The koilin membrane, formed by the secretions of the ventricular and pyloric glands, functions as a protective layer in the gizzards of most bird species. However, the ecological functions of koilin have never been studied in free-ranging penguins. During the two austral summers from 2012 to 2014, w...
Published in: | Polar Research |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Norwegian Polar Institute
2016
|
Subjects: | |
Online Access: | https://doi.org/10.3402/polar.v35.25966 https://doaj.org/article/612ffb0229f24f0b9038d24a159ec506 |
id |
ftdoajarticles:oai:doaj.org/article:612ffb0229f24f0b9038d24a159ec506 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:612ffb0229f24f0b9038d24a159ec506 2023-05-15T13:48:16+02:00 Regurgitation of the koilin layer in chinstrap penguins (Pygoscelis antarcticus) and its association with gastric parasites Han-Kyu Kim Chang-Yong Choi Min-Su Jeong Hwa-Yeon Kang Woo-Shin Lee 2016-06-01T00:00:00Z https://doi.org/10.3402/polar.v35.25966 https://doaj.org/article/612ffb0229f24f0b9038d24a159ec506 EN eng Norwegian Polar Institute http://www.polarresearch.net/index.php/polar/article/view/25966/47261 https://doaj.org/toc/1751-8369 1751-8369 doi:10.3402/polar.v35.25966 https://doaj.org/article/612ffb0229f24f0b9038d24a159ec506 Polar Research, Vol 35, Iss 0, Pp 1-5 (2016) Cuticula gastris host-parasite interaction nematodes parasitic load regurgitation Stegophorus macronectes Environmental sciences GE1-350 Oceanography GC1-1581 article 2016 ftdoajarticles https://doi.org/10.3402/polar.v35.25966 2022-12-31T04:55:43Z The koilin membrane, formed by the secretions of the ventricular and pyloric glands, functions as a protective layer in the gizzards of most bird species. However, the ecological functions of koilin have never been studied in free-ranging penguins. During the two austral summers from 2012 to 2014, we observed the regurgitated koilins of chinstrap penguins (Pygoscelis antarcticus) at Narębski Point on King George Island, South Shetland Islands, and we detected a significant difference in the daily accumulation of regurgitated koilins between the pre-hatching and post-hatching periods in the rookery. We also found 233 gastrointestinal parasites, all Stegophorus macronectes (Nematoda, Acuariidae), from 26 out of 45 koilins freshly regurgitated by chinstrap penguins. We suggest that the regurgitation of koilins may benefit adult chinstrap penguins in the wild by reducing parasitic loads when they fast during incubation; it may also help decrease the risk of parasite transmission to chicks. Our results present the first observations of regurgitated koilins among breeding chinstrap penguins. How koilin regurgitation functions in penguins requires further study. Among the gentoo penguins (P. papua) co-occurring at the study site, we observed no regurgitated koilin layers. Article in Journal/Newspaper Antarc* antarcticus King George Island Polar Research South Shetland Islands Directory of Open Access Journals: DOAJ Articles Austral King George Island South Shetland Islands Polar Research 35 1 25966 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Cuticula gastris host-parasite interaction nematodes parasitic load regurgitation Stegophorus macronectes Environmental sciences GE1-350 Oceanography GC1-1581 |
spellingShingle |
Cuticula gastris host-parasite interaction nematodes parasitic load regurgitation Stegophorus macronectes Environmental sciences GE1-350 Oceanography GC1-1581 Han-Kyu Kim Chang-Yong Choi Min-Su Jeong Hwa-Yeon Kang Woo-Shin Lee Regurgitation of the koilin layer in chinstrap penguins (Pygoscelis antarcticus) and its association with gastric parasites |
topic_facet |
Cuticula gastris host-parasite interaction nematodes parasitic load regurgitation Stegophorus macronectes Environmental sciences GE1-350 Oceanography GC1-1581 |
description |
The koilin membrane, formed by the secretions of the ventricular and pyloric glands, functions as a protective layer in the gizzards of most bird species. However, the ecological functions of koilin have never been studied in free-ranging penguins. During the two austral summers from 2012 to 2014, we observed the regurgitated koilins of chinstrap penguins (Pygoscelis antarcticus) at Narębski Point on King George Island, South Shetland Islands, and we detected a significant difference in the daily accumulation of regurgitated koilins between the pre-hatching and post-hatching periods in the rookery. We also found 233 gastrointestinal parasites, all Stegophorus macronectes (Nematoda, Acuariidae), from 26 out of 45 koilins freshly regurgitated by chinstrap penguins. We suggest that the regurgitation of koilins may benefit adult chinstrap penguins in the wild by reducing parasitic loads when they fast during incubation; it may also help decrease the risk of parasite transmission to chicks. Our results present the first observations of regurgitated koilins among breeding chinstrap penguins. How koilin regurgitation functions in penguins requires further study. Among the gentoo penguins (P. papua) co-occurring at the study site, we observed no regurgitated koilin layers. |
format |
Article in Journal/Newspaper |
author |
Han-Kyu Kim Chang-Yong Choi Min-Su Jeong Hwa-Yeon Kang Woo-Shin Lee |
author_facet |
Han-Kyu Kim Chang-Yong Choi Min-Su Jeong Hwa-Yeon Kang Woo-Shin Lee |
author_sort |
Han-Kyu Kim |
title |
Regurgitation of the koilin layer in chinstrap penguins (Pygoscelis antarcticus) and its association with gastric parasites |
title_short |
Regurgitation of the koilin layer in chinstrap penguins (Pygoscelis antarcticus) and its association with gastric parasites |
title_full |
Regurgitation of the koilin layer in chinstrap penguins (Pygoscelis antarcticus) and its association with gastric parasites |
title_fullStr |
Regurgitation of the koilin layer in chinstrap penguins (Pygoscelis antarcticus) and its association with gastric parasites |
title_full_unstemmed |
Regurgitation of the koilin layer in chinstrap penguins (Pygoscelis antarcticus) and its association with gastric parasites |
title_sort |
regurgitation of the koilin layer in chinstrap penguins (pygoscelis antarcticus) and its association with gastric parasites |
publisher |
Norwegian Polar Institute |
publishDate |
2016 |
url |
https://doi.org/10.3402/polar.v35.25966 https://doaj.org/article/612ffb0229f24f0b9038d24a159ec506 |
geographic |
Austral King George Island South Shetland Islands |
geographic_facet |
Austral King George Island South Shetland Islands |
genre |
Antarc* antarcticus King George Island Polar Research South Shetland Islands |
genre_facet |
Antarc* antarcticus King George Island Polar Research South Shetland Islands |
op_source |
Polar Research, Vol 35, Iss 0, Pp 1-5 (2016) |
op_relation |
http://www.polarresearch.net/index.php/polar/article/view/25966/47261 https://doaj.org/toc/1751-8369 1751-8369 doi:10.3402/polar.v35.25966 https://doaj.org/article/612ffb0229f24f0b9038d24a159ec506 |
op_doi |
https://doi.org/10.3402/polar.v35.25966 |
container_title |
Polar Research |
container_volume |
35 |
container_issue |
1 |
container_start_page |
25966 |
_version_ |
1766249051008794624 |