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Learning from long time series of harvest and population data: Swedish lessons for European goose management

Liljebäck, Niklas and Bergqvist, Göran and Elmberg, Johan and Haas, Fredrik and Nilsson, Leif and Lindstrom, Ake and Månsson, Johan (2021). Learning from long time series of harvest and population data: Swedish lessons for European goose management. Wildlife Biology. 2021 , wlb.00733
[Research article]

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Abstract

Goose management in Europe is faced by multiple challenges, as some species are declining and in need of conservation actions, while other populations have become very abundant, resulting in calls for increased harvest. Sweden has long-term series of harvest data and counts of breeding and autumn-staging geese. We used national data (indices) for greylag goose, bean goose and Canada goose to study shifts in temporal trends and correlative patterns, and to infer possible causal links between harvest and population trends. Our study provides an opportunity to guide management given the data collected within the present monitoring, as well as to suggest improvements for future data collection. The populations of greylag and Canada geese increased in Sweden 1979-2018, but this long-term trend included a recent decrease in the latter species. Bean goose breeding index decreased, whilst staging numbers and harvest varied with no clear long-term trend. For Canada goose, our analysis suggests that harvest may affect population growth negatively. For bean goose and greylag goose we could not detect any effect of harvest on autumn counts the following year. We find that the present data and analysis of coherence may suffice as basis for decisions for the current management situation in Sweden with its rather unspecific goals for greylag (very abundant) and Canada goose (invasive species) populations. However, for management of bean geese, with international concerns of over harvest, data lack crucial information. For future management challenges, with more explicit goals, for all goose species we advocate information that is more precise. Data such as hunting effort, age-structure of goose populations and mark-recapture data to estimate survival and population size, is needed to feed predictive population models guiding future Swedish and European goose management.

Authors/Creators:Liljebäck, Niklas and Bergqvist, Göran and Elmberg, Johan and Haas, Fredrik and Nilsson, Leif and Lindstrom, Ake and Månsson, Johan
Title:Learning from long time series of harvest and population data: Swedish lessons for European goose management
Series Name/Journal:Wildlife Biology
Year of publishing :2021
Volume:2021
Article number:wlb.00733
Number of Pages:10
Publisher:WILDLIFE BIOLOGY
ISSN:0909-6396
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 405 Other Agricultural Sciences > Fish and Wildlife Management
Keywords:conservation, goose populations, harvest, management, monitoring programs, population trajectories, time series
URN:NBN:urn:nbn:se:slu:epsilon-p-113203
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-113203
Additional ID:
Type of IDID
DOI10.2981/wlb.00733
Web of Science (WoS)000672752300003
ID Code:25108
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
S - Faculty of Forest Sciences
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology

(S) > Southern Swedish Forest Research Centre
Deposited By: SLUpub Connector
Deposited On:30 Aug 2021 19:25
Metadata Last Modified:31 Aug 2021 05:01

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