Raptors are still affected by environmental pollutants

Greenlandic Peregrines will not have normal eggshell thickness until 2034

Knud Falk, Søren Møller, Frank F Rigét, Peter B. Sørensen, Katrin Vorkamp

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    Resumé

    The DDT-induced effects, eggshell thinning and breeding failure in Peregrine Falcon populations, were reverted with restrictions on the use of the compound from the 1970’ies, and in most studied populations the eggshell thickness is back to normal. In Greenland, a previous study of eggshell thinning in Peregrines found that shells had not yet reached pre-DDT levels. In this study, we extend the time series and reinterpret shell thinning data for 196 clutches covering a 45-year time span (1972-2017). There was a significant (P<0.001) increase in the eggshell thickness of 0.23% per year. This corresponds to a change in eggshell thinning from 14.5% to 5.4% in 2017 compared to the pre-DDT mean. With the current rate of change, pre-DDT shell thickness is predicted to be reached around the year 2034. However, a few clutches are still below the critical limit. The relatively slower recovery of the shell thickness in the Greenland population is likely indicative of the slower phasing out of DDT in the Greenlandic Peregrines’ wintering grounds in Latin America. The shell thinning in the Greenlandic population probably never crossed the 17% threshold associated with population declines, contrary to the populations in many other parts of the world.
    OriginalsprogEngelsk
    TidsskriftOrnis Hungarica
    Vol/bind26
    Udgave nummer2
    Sider (fra-til)171-176
    Antal sider6
    ISSN1215-1610
    DOI
    StatusUdgivet - 1 feb. 2019

    Citer dette

    Falk, Knud ; Møller, Søren ; Rigét, Frank F ; Sørensen, Peter B. ; Vorkamp, Katrin. / Raptors are still affected by environmental pollutants : Greenlandic Peregrines will not have normal eggshell thickness until 2034. I: Ornis Hungarica. 2019 ; Bind 26, Nr. 2. s. 171-176.
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    abstract = "The DDT-induced effects, eggshell thinning and breeding failure in Peregrine Falcon populations, were reverted with restrictions on the use of the compound from the 1970’ies, and in most studied populations the eggshell thickness is back to normal. In Greenland, a previous study of eggshell thinning in Peregrines found that shells had not yet reached pre-DDT levels. In this study, we extend the time series and reinterpret shell thinning data for 196 clutches covering a 45-year time span (1972-2017). There was a significant (P<0.001) increase in the eggshell thickness of 0.23{\%} per year. This corresponds to a change in eggshell thinning from 14.5{\%} to 5.4{\%} in 2017 compared to the pre-DDT mean. With the current rate of change, pre-DDT shell thickness is predicted to be reached around the year 2034. However, a few clutches are still below the critical limit. The relatively slower recovery of the shell thickness in the Greenland population is likely indicative of the slower phasing out of DDT in the Greenlandic Peregrines’ wintering grounds in Latin America. The shell thinning in the Greenlandic population probably never crossed the 17{\%} threshold associated with population declines, contrary to the populations in many other parts of the world.",
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    author = "Knud Falk and S{\o}ren M{\o}ller and Rig{\'e}t, {Frank F} and S{\o}rensen, {Peter B.} and Katrin Vorkamp",
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    Raptors are still affected by environmental pollutants : Greenlandic Peregrines will not have normal eggshell thickness until 2034. / Falk, Knud; Møller, Søren; Rigét, Frank F; Sørensen, Peter B.; Vorkamp, Katrin.

    I: Ornis Hungarica, Bind 26, Nr. 2, 01.02.2019, s. 171-176.

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    TY - JOUR

    T1 - Raptors are still affected by environmental pollutants

    T2 - Greenlandic Peregrines will not have normal eggshell thickness until 2034

    AU - Falk, Knud

    AU - Møller, Søren

    AU - Rigét, Frank F

    AU - Sørensen, Peter B.

    AU - Vorkamp, Katrin

    PY - 2019/2/1

    Y1 - 2019/2/1

    N2 - The DDT-induced effects, eggshell thinning and breeding failure in Peregrine Falcon populations, were reverted with restrictions on the use of the compound from the 1970’ies, and in most studied populations the eggshell thickness is back to normal. In Greenland, a previous study of eggshell thinning in Peregrines found that shells had not yet reached pre-DDT levels. In this study, we extend the time series and reinterpret shell thinning data for 196 clutches covering a 45-year time span (1972-2017). There was a significant (P<0.001) increase in the eggshell thickness of 0.23% per year. This corresponds to a change in eggshell thinning from 14.5% to 5.4% in 2017 compared to the pre-DDT mean. With the current rate of change, pre-DDT shell thickness is predicted to be reached around the year 2034. However, a few clutches are still below the critical limit. The relatively slower recovery of the shell thickness in the Greenland population is likely indicative of the slower phasing out of DDT in the Greenlandic Peregrines’ wintering grounds in Latin America. The shell thinning in the Greenlandic population probably never crossed the 17% threshold associated with population declines, contrary to the populations in many other parts of the world.

    AB - The DDT-induced effects, eggshell thinning and breeding failure in Peregrine Falcon populations, were reverted with restrictions on the use of the compound from the 1970’ies, and in most studied populations the eggshell thickness is back to normal. In Greenland, a previous study of eggshell thinning in Peregrines found that shells had not yet reached pre-DDT levels. In this study, we extend the time series and reinterpret shell thinning data for 196 clutches covering a 45-year time span (1972-2017). There was a significant (P<0.001) increase in the eggshell thickness of 0.23% per year. This corresponds to a change in eggshell thinning from 14.5% to 5.4% in 2017 compared to the pre-DDT mean. With the current rate of change, pre-DDT shell thickness is predicted to be reached around the year 2034. However, a few clutches are still below the critical limit. The relatively slower recovery of the shell thickness in the Greenland population is likely indicative of the slower phasing out of DDT in the Greenlandic Peregrines’ wintering grounds in Latin America. The shell thinning in the Greenlandic population probably never crossed the 17% threshold associated with population declines, contrary to the populations in many other parts of the world.

    KW - Arctic

    KW - Greenland

    KW - DDT

    KW - pollutants

    KW - egg

    KW - shell thinning

    KW - Monitoring

    U2 - 10.1515/orhu-2018-0026

    DO - 10.1515/orhu-2018-0026

    M3 - Journal article

    VL - 26

    SP - 171

    EP - 176

    JO - Ornis Hungarica

    JF - Ornis Hungarica

    SN - 1215-1610

    IS - 2

    ER -