Meso-scale variations in diet composition of little auk chicks in north-west Spitsbergen
Colonial seabirds from neighbouring breeding aggregations may share foraging grounds or utilize different areas in order to decrease the competition over food resources. In our study, we present the meso-scale variations in the diet composition of zooplanktivorous little auk chicks (Alle alle), base...
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Norwegian Polar Institute
2017
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Online Access: | https://doi.org/10.1080/17518369.2017.1409585 https://doaj.org/article/591acfadd32044199a826cf1e6425cc4 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:591acfadd32044199a826cf1e6425cc4 2023-05-15T13:16:15+02:00 Meso-scale variations in diet composition of little auk chicks in north-west Spitsbergen Rafał Boehnke Kaja Balazy Dariusz Jakubas Katarzyna Wojczulanis-Jakubas Katarzyna Błachowiak-Samołyk 2017-01-01 https://doi.org/10.1080/17518369.2017.1409585 https://doaj.org/article/591acfadd32044199a826cf1e6425cc4 en eng Norwegian Polar Institute 1751-8369 doi:10.1080/17518369.2017.1409585 https://doaj.org/article/591acfadd32044199a826cf1e6425cc4 undefined Polar Research, Vol 36, Iss 1 (2017) Dovekie Svalbard colony zooplankton diet composition Alle alle envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2017 fttriple https://doi.org/10.1080/17518369.2017.1409585 2023-01-22T18:15:46Z Colonial seabirds from neighbouring breeding aggregations may share foraging grounds or utilize different areas in order to decrease the competition over food resources. In our study, we present the meso-scale variations in the diet composition of zooplanktivorous little auk chicks (Alle alle), based on samples collected over two years in two neighbouring colonies (Aasefjellet and Magdalenefjorden) located in north-west Spitsbergen, Svalbard. Although the colonies are situated only 10 km apart, they differ in geographical features (in-fjord vs. coastal). The main findings of our study were significant inter-colony and inter-year differences in the total abundance of diet items and in abundance of particular components. The open-sea species Themisto abyssorum was more abundant in the diet of chicks from Aasefjellet, situated in the outer coast. Another open-sea species, Calanus hyperboreus was also characteristic for this colony but only in the first year of study. On the other hand, the ice-associated amphipod Apherusa glacialis was regularly observed in the diet of little auk chicks from the Magdalenefjorden colony, which is located closer to the marginal ice zone. The differences observed in the diet composition of birds from the two neighbouring sites may indicate that two colonies of birds have at least partly separate foraging areas. Our results could also suggest flexibility in the little auk’s foraging behaviour that enables it to adapt to local feeding conditions. Thus, our study significantly contributes to the deeper understanding of little auks’ feeding strategies in the changing environment of northern Spitsbergen. Article in Journal/Newspaper Alle alle Calanus hyperboreus Dovekie little auk Magdalenefjord* Polar Research Svalbard Themisto abyssorum Spitsbergen Unknown Aasefjellet ENVELOPE(10.833,10.833,79.550,79.550) Magdalenefjorden ENVELOPE(11.010,11.010,79.569,79.569) Svalbard Polar Research 36 1 1409585 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Dovekie Svalbard colony zooplankton diet composition Alle alle envir geo |
spellingShingle |
Dovekie Svalbard colony zooplankton diet composition Alle alle envir geo Rafał Boehnke Kaja Balazy Dariusz Jakubas Katarzyna Wojczulanis-Jakubas Katarzyna Błachowiak-Samołyk Meso-scale variations in diet composition of little auk chicks in north-west Spitsbergen |
topic_facet |
Dovekie Svalbard colony zooplankton diet composition Alle alle envir geo |
description |
Colonial seabirds from neighbouring breeding aggregations may share foraging grounds or utilize different areas in order to decrease the competition over food resources. In our study, we present the meso-scale variations in the diet composition of zooplanktivorous little auk chicks (Alle alle), based on samples collected over two years in two neighbouring colonies (Aasefjellet and Magdalenefjorden) located in north-west Spitsbergen, Svalbard. Although the colonies are situated only 10 km apart, they differ in geographical features (in-fjord vs. coastal). The main findings of our study were significant inter-colony and inter-year differences in the total abundance of diet items and in abundance of particular components. The open-sea species Themisto abyssorum was more abundant in the diet of chicks from Aasefjellet, situated in the outer coast. Another open-sea species, Calanus hyperboreus was also characteristic for this colony but only in the first year of study. On the other hand, the ice-associated amphipod Apherusa glacialis was regularly observed in the diet of little auk chicks from the Magdalenefjorden colony, which is located closer to the marginal ice zone. The differences observed in the diet composition of birds from the two neighbouring sites may indicate that two colonies of birds have at least partly separate foraging areas. Our results could also suggest flexibility in the little auk’s foraging behaviour that enables it to adapt to local feeding conditions. Thus, our study significantly contributes to the deeper understanding of little auks’ feeding strategies in the changing environment of northern Spitsbergen. |
format |
Article in Journal/Newspaper |
author |
Rafał Boehnke Kaja Balazy Dariusz Jakubas Katarzyna Wojczulanis-Jakubas Katarzyna Błachowiak-Samołyk |
author_facet |
Rafał Boehnke Kaja Balazy Dariusz Jakubas Katarzyna Wojczulanis-Jakubas Katarzyna Błachowiak-Samołyk |
author_sort |
Rafał Boehnke |
title |
Meso-scale variations in diet composition of little auk chicks in north-west Spitsbergen |
title_short |
Meso-scale variations in diet composition of little auk chicks in north-west Spitsbergen |
title_full |
Meso-scale variations in diet composition of little auk chicks in north-west Spitsbergen |
title_fullStr |
Meso-scale variations in diet composition of little auk chicks in north-west Spitsbergen |
title_full_unstemmed |
Meso-scale variations in diet composition of little auk chicks in north-west Spitsbergen |
title_sort |
meso-scale variations in diet composition of little auk chicks in north-west spitsbergen |
publisher |
Norwegian Polar Institute |
publishDate |
2017 |
url |
https://doi.org/10.1080/17518369.2017.1409585 https://doaj.org/article/591acfadd32044199a826cf1e6425cc4 |
long_lat |
ENVELOPE(10.833,10.833,79.550,79.550) ENVELOPE(11.010,11.010,79.569,79.569) |
geographic |
Aasefjellet Magdalenefjorden Svalbard |
geographic_facet |
Aasefjellet Magdalenefjorden Svalbard |
genre |
Alle alle Calanus hyperboreus Dovekie little auk Magdalenefjord* Polar Research Svalbard Themisto abyssorum Spitsbergen |
genre_facet |
Alle alle Calanus hyperboreus Dovekie little auk Magdalenefjord* Polar Research Svalbard Themisto abyssorum Spitsbergen |
op_source |
Polar Research, Vol 36, Iss 1 (2017) |
op_relation |
1751-8369 doi:10.1080/17518369.2017.1409585 https://doaj.org/article/591acfadd32044199a826cf1e6425cc4 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1080/17518369.2017.1409585 |
container_title |
Polar Research |
container_volume |
36 |
container_issue |
1 |
container_start_page |
1409585 |
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1766273208549376000 |