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Changing winter diet of thick-billed murres (Uria lomvia) in Southwest Greenland, 1990s versus 2010s

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Changing winter diet of thick-billed murres (Uria lomvia) in Southwest Greenland, 1990s versus 2010s. / Merkel, Flemming Ravn; Linnebjerg, Jannie Fries; Andersen, Ole Gorm Norden; Huffeldt, Nicholas Per; Jansen, Teunis; Hedeholm, Rasmus; Frederiksen, Morten.

In: Canadian Journal of Zoology, Vol. 99, No. 12, 12.2021, p. 1080-1088.

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@article{23ed87c750ff4df7a2bdac78297a827f,
title = "Changing winter diet of thick-billed murres (Uria lomvia) in Southwest Greenland, 1990s versus 2010s",
abstract = "Southwest Greenland constitutes an internationally important wintering area for seabirds, including Thick-billed Murres (Uria lomvia (Linnaeus, 1758)), but their prey may be affected by the general warming of this sub-Arctic region. We compared murre diet collected in winter in the 1990s and in the 2010s around Nuuk, Greenland. Fish made up 36% of the diet (wet mass) and crustaceans 63% in the 1990s, changing to 22% and 78% in the 2010s, respectively. Capelin (Mallotus villosus (M€uller, 1776)) was the dominant fish species, and the smaller contribution in the 2010s coincided with declining densities of capelin around Nuuk. The crustaceans were dominated by two krill species (Meganyctiphanes norvegica (M. Sars, 1857) and Thysanoessa inermis (Kr{\o}yer, 1846)). However, M. norvegica was only important in the 2010s (51% wet mass), while T. inermis was dominating the 1990s with 62% wet mass and only 23% in the 2010s. The dominance of M. norvegica in the 2010s confirmed our expectations of a gradual “borealization” of this region due to the generally warming sub-Arctic. The smaller contribution of fish in the diet may also support the hypothesis of deteriorating winter conditions for murres. Apart from the diet, plastic was found in 15% of the birds and 53% had parasitic nematodes.",
keywords = "Borealization, Capelin, Krill, Mallotus villosus, Seabird winter diet, Southwest Greenland, Thick-billed Murre, Uria lomvia",
author = "Merkel, {Flemming Ravn} and Linnebjerg, {Jannie Fries} and Andersen, {Ole Gorm Norden} and Huffeldt, {Nicholas Per} and Teunis Jansen and Rasmus Hedeholm and Morten Frederiksen",
year = "2021",
month = dec,
doi = "10.1139/cjz-2021-0120",
language = "English",
volume = "99",
pages = "1080--1088",
journal = "Canadian Journal of Zoology",
issn = "0008-4301",
publisher = "N R C Research Press",
number = "12",

}

RIS

TY - JOUR

T1 - Changing winter diet of thick-billed murres (Uria lomvia) in Southwest Greenland, 1990s versus 2010s

AU - Merkel, Flemming Ravn

AU - Linnebjerg, Jannie Fries

AU - Andersen, Ole Gorm Norden

AU - Huffeldt, Nicholas Per

AU - Jansen, Teunis

AU - Hedeholm, Rasmus

AU - Frederiksen, Morten

PY - 2021/12

Y1 - 2021/12

N2 - Southwest Greenland constitutes an internationally important wintering area for seabirds, including Thick-billed Murres (Uria lomvia (Linnaeus, 1758)), but their prey may be affected by the general warming of this sub-Arctic region. We compared murre diet collected in winter in the 1990s and in the 2010s around Nuuk, Greenland. Fish made up 36% of the diet (wet mass) and crustaceans 63% in the 1990s, changing to 22% and 78% in the 2010s, respectively. Capelin (Mallotus villosus (M€uller, 1776)) was the dominant fish species, and the smaller contribution in the 2010s coincided with declining densities of capelin around Nuuk. The crustaceans were dominated by two krill species (Meganyctiphanes norvegica (M. Sars, 1857) and Thysanoessa inermis (Krøyer, 1846)). However, M. norvegica was only important in the 2010s (51% wet mass), while T. inermis was dominating the 1990s with 62% wet mass and only 23% in the 2010s. The dominance of M. norvegica in the 2010s confirmed our expectations of a gradual “borealization” of this region due to the generally warming sub-Arctic. The smaller contribution of fish in the diet may also support the hypothesis of deteriorating winter conditions for murres. Apart from the diet, plastic was found in 15% of the birds and 53% had parasitic nematodes.

AB - Southwest Greenland constitutes an internationally important wintering area for seabirds, including Thick-billed Murres (Uria lomvia (Linnaeus, 1758)), but their prey may be affected by the general warming of this sub-Arctic region. We compared murre diet collected in winter in the 1990s and in the 2010s around Nuuk, Greenland. Fish made up 36% of the diet (wet mass) and crustaceans 63% in the 1990s, changing to 22% and 78% in the 2010s, respectively. Capelin (Mallotus villosus (M€uller, 1776)) was the dominant fish species, and the smaller contribution in the 2010s coincided with declining densities of capelin around Nuuk. The crustaceans were dominated by two krill species (Meganyctiphanes norvegica (M. Sars, 1857) and Thysanoessa inermis (Krøyer, 1846)). However, M. norvegica was only important in the 2010s (51% wet mass), while T. inermis was dominating the 1990s with 62% wet mass and only 23% in the 2010s. The dominance of M. norvegica in the 2010s confirmed our expectations of a gradual “borealization” of this region due to the generally warming sub-Arctic. The smaller contribution of fish in the diet may also support the hypothesis of deteriorating winter conditions for murres. Apart from the diet, plastic was found in 15% of the birds and 53% had parasitic nematodes.

KW - Borealization

KW - Capelin

KW - Krill

KW - Mallotus villosus

KW - Seabird winter diet

KW - Southwest Greenland

KW - Thick-billed Murre

KW - Uria lomvia

UR - http://www.scopus.com/inward/record.url?scp=85119518045&partnerID=8YFLogxK

U2 - 10.1139/cjz-2021-0120

DO - 10.1139/cjz-2021-0120

M3 - Journal article

AN - SCOPUS:85119518045

VL - 99

SP - 1080

EP - 1088

JO - Canadian Journal of Zoology

JF - Canadian Journal of Zoology

SN - 0008-4301

IS - 12

ER -