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The co-distribution of Arctic cod and its seabird predators across the marginal ice zone in Baffin Bay

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The co-distribution of Arctic cod and its seabird predators across the marginal ice zone in Baffin Bay. / LeBlanc, Mathieu; Gauthier, Stéphane; Garbus, Svend Erik; Mosbech, Anders; Fortier, Louis .

I: Elementa: Science of the Anthropocene, Bind 7, 02.01.2019.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

LeBlanc, M, Gauthier, S, Garbus, SE, Mosbech, A & Fortier, L 2019, 'The co-distribution of Arctic cod and its seabird predators across the marginal ice zone in Baffin Bay', Elementa: Science of the Anthropocene, bind 7. https://doi.org/10.1525/elementa.339

APA

LeBlanc, M., Gauthier, S., Garbus, S. E., Mosbech, A., & Fortier, L. (2019). The co-distribution of Arctic cod and its seabird predators across the marginal ice zone in Baffin Bay. Elementa: Science of the Anthropocene, 7. https://doi.org/10.1525/elementa.339

CBE

MLA

Vancouver

LeBlanc M, Gauthier S, Garbus SE, Mosbech A, Fortier L. The co-distribution of Arctic cod and its seabird predators across the marginal ice zone in Baffin Bay. Elementa: Science of the Anthropocene. 2019 jan 2;7. https://doi.org/10.1525/elementa.339

Author

LeBlanc, Mathieu ; Gauthier, Stéphane ; Garbus, Svend Erik ; Mosbech, Anders ; Fortier, Louis . / The co-distribution of Arctic cod and its seabird predators across the marginal ice zone in Baffin Bay. I: Elementa: Science of the Anthropocene. 2019 ; Bind 7.

Bibtex

@article{4e6eb067623146fba3848fa7ce9c64b2,
title = "The co-distribution of Arctic cod and its seabird predators across the marginal ice zone in Baffin Bay",
abstract = "Arctic cod (Boreogadus saida) is the dominant pelagic fish in Arctic seas and a staple food of many arctic predators including several seabird species. Marginal ice zones are known as important feeding locations for seabirds. The hypothesis that thick-billed murre (Uria lomvia), northern fulmar (Fulmarus glacialis) and black-legged kittiwake (Rissa tridactyla) congregate in areas of high Arctic cod food resource and low ice concentration was tested at different spatial scales. Arctic cod biomass was estimated by hydroacoustics as a resource proxy, and seabirds were counted and sampled for stomach analysis along eight longitudinal transects across the marginal ice zone in southern Baffin Bay in June-July 2016. With increasing length, the epipelagic age-0 Arctic cod migrated from open waters to ice-covered areas. Subsequently, age-1 and age-2 Arctic cod tended to concentrate in a subsurface layer (40-100 m) within the epipelagic layer. Arctic cod 5.7-16.1 cm long (late age-0 to age-5) were the main fish prey of the three seabird species, which preferentially captured age-1 cod (6-11.5 cm). At large spatial scale (western versus eastern Baffin Bay), thick-billed murre, northern fulmar and their Arctic cod resource proxy were generally more abundant on the western ice-covered side of Baffin Bay. No clear spatial match was found, however, when comparing seabird abundances and their food-resource proxy in different ice concentrations across the marginal ice zone or at small scale (5 km). At medium scale (12.5 km), only murre density was influenced positively by its Arctic cod resource. A lack of schooling behavior and a successful strategy to avoid predation by hiding under the ice could explain the absence of any strong spatial match between Arctic cod and its seabird predators at these different scales.",
keywords = "boreogadus saida, arctic seabirds, Predator-prey interactions, spatial distribution, ontogenic migraton, MARGINAL ICE-ZONE",
author = "Mathieu LeBlanc and St{\'e}phane Gauthier and Garbus, {Svend Erik} and Anders Mosbech and Louis Fortier",
year = "2019",
month = jan,
day = "2",
doi = "10.1525/elementa.339",
language = "English",
volume = "7",
journal = "Elementa: Science of the Anthropocene",
issn = "2325-1026",
publisher = "BioOne",

}

RIS

TY - JOUR

T1 - The co-distribution of Arctic cod and its seabird predators across the marginal ice zone in Baffin Bay

AU - LeBlanc, Mathieu

AU - Gauthier, Stéphane

AU - Garbus, Svend Erik

AU - Mosbech, Anders

AU - Fortier, Louis

PY - 2019/1/2

Y1 - 2019/1/2

N2 - Arctic cod (Boreogadus saida) is the dominant pelagic fish in Arctic seas and a staple food of many arctic predators including several seabird species. Marginal ice zones are known as important feeding locations for seabirds. The hypothesis that thick-billed murre (Uria lomvia), northern fulmar (Fulmarus glacialis) and black-legged kittiwake (Rissa tridactyla) congregate in areas of high Arctic cod food resource and low ice concentration was tested at different spatial scales. Arctic cod biomass was estimated by hydroacoustics as a resource proxy, and seabirds were counted and sampled for stomach analysis along eight longitudinal transects across the marginal ice zone in southern Baffin Bay in June-July 2016. With increasing length, the epipelagic age-0 Arctic cod migrated from open waters to ice-covered areas. Subsequently, age-1 and age-2 Arctic cod tended to concentrate in a subsurface layer (40-100 m) within the epipelagic layer. Arctic cod 5.7-16.1 cm long (late age-0 to age-5) were the main fish prey of the three seabird species, which preferentially captured age-1 cod (6-11.5 cm). At large spatial scale (western versus eastern Baffin Bay), thick-billed murre, northern fulmar and their Arctic cod resource proxy were generally more abundant on the western ice-covered side of Baffin Bay. No clear spatial match was found, however, when comparing seabird abundances and their food-resource proxy in different ice concentrations across the marginal ice zone or at small scale (5 km). At medium scale (12.5 km), only murre density was influenced positively by its Arctic cod resource. A lack of schooling behavior and a successful strategy to avoid predation by hiding under the ice could explain the absence of any strong spatial match between Arctic cod and its seabird predators at these different scales.

AB - Arctic cod (Boreogadus saida) is the dominant pelagic fish in Arctic seas and a staple food of many arctic predators including several seabird species. Marginal ice zones are known as important feeding locations for seabirds. The hypothesis that thick-billed murre (Uria lomvia), northern fulmar (Fulmarus glacialis) and black-legged kittiwake (Rissa tridactyla) congregate in areas of high Arctic cod food resource and low ice concentration was tested at different spatial scales. Arctic cod biomass was estimated by hydroacoustics as a resource proxy, and seabirds were counted and sampled for stomach analysis along eight longitudinal transects across the marginal ice zone in southern Baffin Bay in June-July 2016. With increasing length, the epipelagic age-0 Arctic cod migrated from open waters to ice-covered areas. Subsequently, age-1 and age-2 Arctic cod tended to concentrate in a subsurface layer (40-100 m) within the epipelagic layer. Arctic cod 5.7-16.1 cm long (late age-0 to age-5) were the main fish prey of the three seabird species, which preferentially captured age-1 cod (6-11.5 cm). At large spatial scale (western versus eastern Baffin Bay), thick-billed murre, northern fulmar and their Arctic cod resource proxy were generally more abundant on the western ice-covered side of Baffin Bay. No clear spatial match was found, however, when comparing seabird abundances and their food-resource proxy in different ice concentrations across the marginal ice zone or at small scale (5 km). At medium scale (12.5 km), only murre density was influenced positively by its Arctic cod resource. A lack of schooling behavior and a successful strategy to avoid predation by hiding under the ice could explain the absence of any strong spatial match between Arctic cod and its seabird predators at these different scales.

KW - boreogadus saida

KW - arctic seabirds

KW - Predator-prey interactions

KW - spatial distribution

KW - ontogenic migraton

KW - MARGINAL ICE-ZONE

U2 - 10.1525/elementa.339

DO - 10.1525/elementa.339

M3 - Journal article

VL - 7

JO - Elementa: Science of the Anthropocene

JF - Elementa: Science of the Anthropocene

SN - 2325-1026

ER -