An interim harvest strategy for Taiga Bean geese
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Abstract
In 2016 the AEWA European Goose Management International Working Group (EGM
IWG) adopted document AEWA/EGM IWG 1.8 (Johnson et al. 2016), which contained initial
elements of an Adaptive Harvest Management programme for Taiga Bean Geese. This report
addresses a number of limitations with the population model presented in that document, and
provides up-to-date population projections for the Central Management Unit under a range of
constant harvest rates. Based on simulations for the 2017-2025 timeframe, median population
size was near the median goal of 70,000 in 2019, 2020, and 2021 for harvest rates of birds aged
one year or more of 0.00, 0.02, and 0.04, respectively. Simulated population sizes generally
increased over the timeframe, albeit with a lot of variation and with the degree of uncertainty
increasing over time. With a harvest rate of 0.02, harvests averaged 1,848 (95% CI: 1,403 – 2,492) over the timeframe; a harvest rate of 0.04 produced an average harvest of 3,484 (95% CI: 2,617 – 4,884). Future work for the Central Management Unit will involve development of a dynamic harvest strategy by employing a Markov decision process, in which multiple, possibly competing, management objectives can be addressed.
Suggested Citation
Johnson, F.A., Alhainen, M., Fox, A.D., Madsen, J., 2018, An interim harvest strategy for Taiga Bean geese, in 2nd meeting of the AEWA European Goose Management International Working Group, Copenhagen, Denmark, June 15-16, 2017, 12 p.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | An interim harvest strategy for Taiga Bean geese |
| Year Published | 2018 |
| Language | English |
| Publisher | Danish Ministry of Environment and Food, Environmental Protection Agency |
| Contributing office(s) | Wetland and Aquatic Research Center |
| Description | 12 p. |
| Larger Work Type | Book |
| Larger Work Subtype | Conference publication |
| Larger Work Title | 2nd meeting of the AEWA European Goose Management International Working Group |
| Conference Title | 2nd meeting of the AEWA European Goose Management International Working Group |
| Conference Location | Copenhagen, Denmark |
| Conference Date | June 15-16, 2017 |