Associations between duck harvest, hunting wing ratios and measures of reproductive output in Northern Europe

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http://hdl.handle.net/10138/309592

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Holopainen , S , Christensen , T K , Pöysä , H , Väänänen , V-M , Rintala , J & Fox , A D 2018 , ' Associations between duck harvest, hunting wing ratios and measures of reproductive output in Northern Europe ' , European Journal of Wildlife Research , vol. 64 , no. 6 , 72 . https://doi.org/10.1007/s10344-018-1227-5

Title: Associations between duck harvest, hunting wing ratios and measures of reproductive output in Northern Europe
Author: Holopainen, Sari; Christensen, Thomas Kjaer; Pöysä, Hannu; Väänänen, Veli-Matti; Rintala, Jukka; Fox, Anthony D.
Other contributor: University of Helsinki, Wetland Ecology Group
University of Helsinki, Wetland Ecology Group


Date: 2018-12
Language: eng
Number of pages: 8
Belongs to series: European Journal of Wildlife Research
ISSN: 1612-4642
DOI: https://doi.org/10.1007/s10344-018-1227-5
URI: http://hdl.handle.net/10138/309592
Abstract: Ducks are important game species, hunted in several countries throughout their annual cycle. We investigated whether the size of the annual duck harvest in Finland and Denmark reflected annual reproductive output in three common quarry duck species. Finland represents an important breeding area and Denmark important staging/wintering grounds for common teal (Anas crecca), Eurasian wigeon (Mareca penelope) and common goldeneye (Bucephala clangula). We assessed whether (i) annual duck harvest in these two countries correlated with variation in Finnish reproductive output or adult population size during 1990-2016 and (ii) variation in reproductive output of Finnish ducks was reflected in the juvenile ratios of birds harvested in Finland (2005-2007, 2014-2016) or Denmark (1990-2016). We hypothesised that variation in Finnish reproductive output would positively affect the size and juvenile ratio of the harvest, and that this effect would be stronger closer to the breeding grounds. Our data showed that the annual harvest of goldeneye in Finland was positively correlated with reproductive output, a desirable basis for applying sustainable management to this species. Teal and wigeon have much longer, more complex flyways, and their harvest did not mirror the annual production of young, although the wigeon harvest in Denmark increased with increasing juvenile ratio there. For these populations, we need to better define population units if we are to be able to assess harvest sustainability. We urgently need to monitor duck breeding success and harvest at larger spatial scales to support a comprehensive analysis of how well the harvest reflects reproductive output.
Subject: Sustainable harvest
Anas crecca
Mareca penelope
Bucephala clangula
Flyway
Wing samples
WIGEON ANAS-PENELOPE
SUSTAINABLE EXPLOITATION
WINTERING DISTRIBUTIONS
POPULATION-DYNAMICS
LIFE-HISTORY
SEX-RATIOS
LONG-TERM
SURVIVAL
MALLARDS
CLIMATE
1181 Ecology, evolutionary biology
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