Wildlife monitoring in Finland: online information for game administration, hunters, and the wider public

Helle, Pekka; Ikonen, Katja; Kantola, Anu

doi:10.1139/cjfr-2015-0454

Cited by 31 publications

(23 citation statements)

References 9 publications

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“…Tools for the remote capture, digital storing and processing of largescale data related to ungulate management (e.g. observations, harvest, mortality and recruitment rates) have become available and are commonly used in several European countries (Ueno et al 2014;Zaragozí et al 2015;Helle et al 2016;Bubnicki et al 2016). As accurate spatial data accumulates, it will provide valuable information for e.g.…”

Section: Ungulate Management Databasesmentioning

confidence: 99%

Challenges and science-based implications for modern management and conservation of European ungulate populations

et al. 2017

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Wildlife management systems face growing challenges to cope with increasingly complex interactions between wildlife populations, the environment and human activities. In this position statement, we address the most important issues characterising current ungulate conservation and management in Europe. We present some key points arising from ecological research that may be critical for a reassessment of ungulate management in the future.

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Section: Ungulate Management Databasesmentioning

confidence: 99%

Challenges and science-based implications for modern management and conservation of European ungulate populations

et al. 2017

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“…All values are z-scores (standardized). black grouse from Finland were from nationwide density estimates between 1964 and 2014 (Helle & Ikonen, 2015). From Norway we had snippets of density estimates of capercaillie in Vegårshei municipality between 1953-62 and 1967-76, together with harvest data from Hurdal municipality for both species in the periods 1953-75 and 2008-14 (only black grouse was culled in the latter period) (Sørensen, 1977a, b;Wegge & Grasaas, 1977;Statistics Norway, 2016).…”

Section: Datamentioning

confidence: 99%

Declining reproductive output in capercaillie and black grouse – 16 countries and 80 years

Jahren¹,

Storaas²,

Willebrand³

et al. 2016

Animal Biol

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Declines in populations of capercaillie (Tetrao urogallus) and black grouse (Lyrurus tetrix) have been reported from both Central Europe and the continuous boreal forests of Fennoscandia. While intensified land-use is assumed to be the underlying cause of these declines, the mechanisms are not yet understood. Predation is the proximate cause of mortality of eggs, chicks and adults throughout capercaillie and black grouse ranges, but the link between predation and habitat and/or climate change remains unclear. To investigate temporal trends in reproductive output of woodland grouse, we collated previously published and unpublished data of reproduction in capercaillie and black grouse throughout their ranges from 1930 to 2012. We show that, overall, reproductive success has decreased and stabilized at low levels in most regions whilst capercaillie reproductive output in Scotland is still declining. With today's net reproduction, capercaillie and black grouse adult survival is too low to compensate for reproduction declines. Consequently, populations are expected to further decline unless reproductive performances improve. We put our findings in the context of changes in land use, climate and generalist predator numbers. By critically reviewing how these factors limit reproductive success in capercaillie and black grouse, we hope to shed light on the underlying mechanisms causing the decline. Our results imply that measures should be undertaken to reduce mortality of capercaillie and black grouse chicks and eggs. We suggest that future studies should aim to better understand which predators limit capercaillie and black grouse populations and how predation rates are mediated by continuously changing habitat and climate.

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“…The 'triangle' itself is an equilateral triangle with each side measuring 4 km, adding up to form a 12-km long permanent inventory route. The route is checked twice a year (winter and summer), with the main purpose of providing information on the status of wildlife populations 12 . The summer counting is done in late-July or early-August, specifically to estimate the grouse numbers and the success of grouse breeding prior to deciding the length of, and possible restrictions to, the autumn´s grouse hunting season.…”

Section: Methodsmentioning

confidence: 99%

“…The numbers of the tundra population have been comparably stable compared to those of the forest populations, which in the south, saw heavy, apparently warming-induced declines already in the 1930s. These were followed by partial revivals, but since the 1960s, the populations across southern and central Finland have been declining rather continuously [11][12][13] . To a large extent, this latter, more widespread decline has been attributed to the draining and afforestation of peatlands (mires, bogs) -widespread across Finland between the 1950s and the 1980s, affecting up to 80-90% of the peatlands in areas of Southern and Central Finland 14 .…”

mentioning

confidence: 99%

Decline of the boreal willow grouse (Lagopus lagopus) has been accelerated by more frequent snow-free springs

Melin

Mehtätalo

Helle

et al. 2020

Sci Rep

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Climate change has influenced a range of species across the globe. Yet, to state a noted decline in the abundance of a given species as a consequence of a specific environmental change, for instance, spatially explicit long-term data are a prerequisite. This study assessed the extent to which prolonged snow-free periods in autumn and spring have contributed to the decline of the willow grouse, the only forest grouse changing into a white winter plumage. Time-series data of willow grouse numbers from summer surveys across the study area were integrated with local data on weather (snow cover), mammalian predator abundance and hunting intensity. Modelling was conducted with a hierarchical Bayesian Poisson model, acknowledging year-, area-and location-specific variability. The results show that while willow grouse numbers had decreased continuously across the study landscapes, the decrease was accelerated at the sites where, and during the years when the preceding April was the most snow-free. This indicates a mismatch between the change into a white winter plumage and the presence of snow, turning the bird into an ill-camouflaged prey. The results thus also confirm past hypotheses where local declines of the species have been attributed to prolonged snow-free periods. Across our study area, autumns and springs have become more snow-free, and the trend has been predicted to continue. Thus, in addition to conservation actions, the future of a species such as the willow grouse is also dependent on its ability to adapt to the changed environmental conditions.

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Wildlife monitoring in Finland: online information for game administration, hunters, and the wider public

Cited by 31 publications

References 9 publications

Challenges and science-based implications for modern management and conservation of European ungulate populations

Challenges and science-based implications for modern management and conservation of European ungulate populations

Declining reproductive output in capercaillie and black grouse – 16 countries and 80 years

Decline of the boreal willow grouse (Lagopus lagopus) has been accelerated by more frequent snow-free springs

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