Aarhus University Seal / Aarhus Universitets segl

Karsten Laursen

Allocation of body reserves during winter in eider Somataeria mollissima as preparation for spring migration and reproduction

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Allocation of body reserves during winter in eider Somataeria mollissima as preparation for spring migration and reproduction. / Laursen, Karsten; Møller, Anders Pape; Haugaard, Lars; Öst, Markus; Vainio, Jouni.

In: Journal of Sea Research, Vol. 144, No. February, 02.2019, p. 49-56.

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Laursen, Karsten ; Møller, Anders Pape ; Haugaard, Lars ; Öst, Markus ; Vainio, Jouni. / Allocation of body reserves during winter in eider Somataeria mollissima as preparation for spring migration and reproduction. In: Journal of Sea Research. 2019 ; Vol. 144, No. February. pp. 49-56.

Bibtex

@article{3e2ebbb0611c493c89145c68c08618be,
title = "Allocation of body reserves during winter in eider Somataeria mollissima as preparation for spring migration and reproduction",
abstract = "Capital breeders, such as the eider duck Somateria mollissima, accumulate resources before the start of breeding. Eiders preferentially feed on blue mussels Mytilus edulis to build up body condition during winter. We explored how body condition and gizzard mass of wintering eiders relate to mussel quality and quantity, winter climate and body condition of females at the breeding grounds. Body condition during winter (defined as scaled body mass index) of eiders increased during winter and the magnitude of the effect depended on age and mussel quality. Gizzard mass of eiders increased during winter with effects of mussel quality, mussel stocks and sex. Body condition in winter of adult females increased from the first half of January to the second half of February on average by 1.5{\%}, equal to c. 96 g. During the same period gizzard mass of adult females increased by 12.2{\%}, i.e., a nearly ten-fold increase compared to that observed in body condition in winter. Body condition of females at the breeding grounds in Finland (defined as body condition at hatching) was significantly positively correlated with gizzard mass in winter, but not significantly correlated with body condition in winter. Thus, eiders allocate body reserves to increase gizzard mass but less so to increase body condition in winter. This can be considered an adaptive migratory strategy of these eiders, whereby large winter (pre-migratory) gizzards increase food processing capacity, making it possible for eiders to arrive at the breeding grounds with superior body condition and a high reproductive potential.",
keywords = "Blue mussel, Body condition in winter, Gizzard mass, Mussel quality, Mussel stocks, Somateria mollissima, Winter climate",
author = "Karsten Laursen and M{\o}ller, {Anders Pape} and Lars Haugaard and Markus {\"O}st and Jouni Vainio",
year = "2019",
month = "2",
doi = "10.1016/j.seares.2018.11.005",
language = "English",
volume = "144",
pages = "49--56",
journal = "Journal of Sea Research",
issn = "1385-1101",
publisher = "Elsevier BV",
number = "February",

}

RIS

TY - JOUR

T1 - Allocation of body reserves during winter in eider Somataeria mollissima as preparation for spring migration and reproduction

AU - Laursen, Karsten

AU - Møller, Anders Pape

AU - Haugaard, Lars

AU - Öst, Markus

AU - Vainio, Jouni

PY - 2019/2

Y1 - 2019/2

N2 - Capital breeders, such as the eider duck Somateria mollissima, accumulate resources before the start of breeding. Eiders preferentially feed on blue mussels Mytilus edulis to build up body condition during winter. We explored how body condition and gizzard mass of wintering eiders relate to mussel quality and quantity, winter climate and body condition of females at the breeding grounds. Body condition during winter (defined as scaled body mass index) of eiders increased during winter and the magnitude of the effect depended on age and mussel quality. Gizzard mass of eiders increased during winter with effects of mussel quality, mussel stocks and sex. Body condition in winter of adult females increased from the first half of January to the second half of February on average by 1.5%, equal to c. 96 g. During the same period gizzard mass of adult females increased by 12.2%, i.e., a nearly ten-fold increase compared to that observed in body condition in winter. Body condition of females at the breeding grounds in Finland (defined as body condition at hatching) was significantly positively correlated with gizzard mass in winter, but not significantly correlated with body condition in winter. Thus, eiders allocate body reserves to increase gizzard mass but less so to increase body condition in winter. This can be considered an adaptive migratory strategy of these eiders, whereby large winter (pre-migratory) gizzards increase food processing capacity, making it possible for eiders to arrive at the breeding grounds with superior body condition and a high reproductive potential.

AB - Capital breeders, such as the eider duck Somateria mollissima, accumulate resources before the start of breeding. Eiders preferentially feed on blue mussels Mytilus edulis to build up body condition during winter. We explored how body condition and gizzard mass of wintering eiders relate to mussel quality and quantity, winter climate and body condition of females at the breeding grounds. Body condition during winter (defined as scaled body mass index) of eiders increased during winter and the magnitude of the effect depended on age and mussel quality. Gizzard mass of eiders increased during winter with effects of mussel quality, mussel stocks and sex. Body condition in winter of adult females increased from the first half of January to the second half of February on average by 1.5%, equal to c. 96 g. During the same period gizzard mass of adult females increased by 12.2%, i.e., a nearly ten-fold increase compared to that observed in body condition in winter. Body condition of females at the breeding grounds in Finland (defined as body condition at hatching) was significantly positively correlated with gizzard mass in winter, but not significantly correlated with body condition in winter. Thus, eiders allocate body reserves to increase gizzard mass but less so to increase body condition in winter. This can be considered an adaptive migratory strategy of these eiders, whereby large winter (pre-migratory) gizzards increase food processing capacity, making it possible for eiders to arrive at the breeding grounds with superior body condition and a high reproductive potential.

KW - Blue mussel

KW - Body condition in winter

KW - Gizzard mass

KW - Mussel quality

KW - Mussel stocks

KW - Somateria mollissima

KW - Winter climate

UR - http://www.scopus.com/inward/record.url?scp=85056855897&partnerID=8YFLogxK

U2 - 10.1016/j.seares.2018.11.005

DO - 10.1016/j.seares.2018.11.005

M3 - Journal article

AN - SCOPUS:85056855897

VL - 144

SP - 49

EP - 56

JO - Journal of Sea Research

JF - Journal of Sea Research

SN - 1385-1101

IS - February

ER -