Large-Scale Synchrony in the Dynamics of Capercaillie, Black Grouse and Hazel Grouse Populations in Finland

Oikos ◽  
1996 ◽  
Vol 76 (2) ◽  
pp. 221 ◽  
Author(s):  
Jan Lindström ◽  
Esa Ranta ◽  
Harto Lindén ◽  
Jan Lindstrom ◽  
Harto Linden
Keyword(s):  
Large Scale ◽  
Black Grouse ◽  
Hazel Grouse

On Leucocytozoon in Swedish Capercaillie, Black Grouse and Hazel Grouse

1954 ◽  
Vol 18 (1) ◽  
pp. 142
Author(s):  
Arnold B. Erickson ◽  
Karl Borg
Keyword(s):  
Black Grouse ◽  
Hazel Grouse

scholarly journals Species structure of small game hunting in the Kirov region at the beginning of the XXI century

2021 ◽  
Vol 22 (4) ◽  
pp. 597-607
Author(s):  
Boris E. Zarubin ◽  
Vyacheslav V. Kolesnikov ◽  
Anna V. Kozlova ◽  
Maria S. Shevnina ◽  
Alexander V. Economov
Keyword(s):  
Species Structure ◽  
Total Production ◽  
Black Grouse ◽  
European Hare ◽  
Hunting Season ◽  
Small Game ◽  
Hazel Grouse ◽  
Bean Goose ◽  
Species Groups ◽  
Game Hunting

An assessment of the species structure and size of small game prey for the spring and autumn-winter hunting seasons on the territory of the Kirov region was made, using a questionnaire survey based on the analysis of the prey of 3220 individuals. Small game includes such species (groups of species) as mallard, Northern shoveler, pintail, teal-whistle, teal cracker (Garganey), Eurasian wigeon, diving ducks, white-fronted goose, bean goose, wood grouse, black grouse, hazel grouse, woodcock, double snipe, snipe, corncrake, wood pigeon, turtle doves, white hare, European hare. The average index of production by species and groups of species per 1 hunter, who went hunting in the spring and autumn-winter seasons, has been calculated. The size of game catch during the spring hunting was 135.8 thousand individuals, in the autumn-winter hunting season -470 thousand individuals. The summation of the results obtained made it possible to estimate the volume of the total (annual) catch of small game in the amount of almost 606 thousand individuals. The main species are the mallard, hazel grouse, white hare, woodcock, black grouse, Eurasian wigeon, teal cracker (Garganey), Northern shoveler, wood grouse, white-fronted goose, bean goose, teal-whistle, their total share is 94.88% of the annual production of small game. The first five species can be assessed as the most massive in production (or popular), the share of each of them is over 10% of the total production, and in total they amount to 70.4%.

scholarly journals 2. Remarks on a Hybrid between the Black Grouse and the Hazel Grouse.

2009 ◽  
Vol 44 (1) ◽  
pp. 345-347
Author(s):  
H. E. Dresser
Keyword(s):  
Black Grouse ◽  
Hazel Grouse

Size and spacing of grouse leks: comparing capercaillie (Tetrao urogallus) and black grouse (Tetrao tetrix) in two contrasting Eurasian boreal forest landscapes

2009 ◽  
Vol 87 (11) ◽  
pp. 1032-1043 ◽  
Author(s):  
Jørund Rolstad ◽  
Per Wegge ◽  
Andrey V. Sivkov ◽  
Olav Hjeljord ◽  
Ken Olaf Storaunet
Keyword(s):  
Forest Dynamics ◽  
Large Scale ◽  
Landscape Scale ◽  
Tetrao Urogallus ◽  
Black Grouse ◽  
Surrounding Area ◽  
Social Attraction ◽  
Tetrao Tetrix ◽  
Habitat Affinities

Capercaillie ( Tetrao urogallus L., 1758) and black grouse ( Tetrao tetrix L., 1758 (= Lyrurus tetrix (L., 1758))) are two sympatric Eurasian lekking grouse species that differ markedly in habitat affinities and social organization. We examined how size and spacing of leks in pristine (Russia) and managed (Norway) forests were related to habitat and social behavior. Leks of both species were larger and spaced farther apart in the pristine landscape. Capercaillie leks were regularly spaced at 2–3 km distance, increasing with lek size, which in turn was positively related to the amount of middle-aged and older forests in the surrounding area. Black grouse leks were irregularly distributed at shorter distances of 1–2 km, with lek size explained by the size of the open bog arena and the amount of open habitat in the surroundings. At the landscape scale, spatial distribution of open bogs and social attraction among male black grouse caused leks to be more aggregated, whereas mutual avoidance in male capercaillie caused leks to be spaced out. In the pristine landscape, large-scale and long-term changes in forest dynamics owing to wildfires, combined with an aggregated pattern of huge bog complexes, presumably provide both grouse species with enough time and space to build up bigger lek populations than in the managed landscape.

scholarly journals Transcriptome sequencing of black grouse ( Tetrao tetrix ) for immune gene discovery and microsatellite development

Open Biology ◽  
2012 ◽  
Vol 2 (4) ◽  
pp. 120054 ◽  
Author(s):  
Biao Wang ◽  
Robert Ekblom ◽  
Todd A. Castoe ◽  
Eleanor P. Jones ◽  
Radoslav Kozma ◽  
...  
Keyword(s):  
Large Scale ◽  
Expressed Sequence Tag ◽  
Gene Discovery ◽  
Bird Species ◽  
Preliminary Test ◽  
Immune Gene ◽  
Large Set ◽  
Black Grouse ◽  
Immune Genes ◽  
Tetrao Tetrix

The black grouse ( Tetrao tetrix ) is a galliform bird species that is important for both ecological studies and conservation genetics. Here, we report the sequencing of the spleen transcriptome of black grouse using 454 GS FLX Titanium sequencing. We performed a large-scale gene discovery analysis with a focus on genes that might be related to fitness in this species and also identified a large set of microsatellites. In total, we obtained 182 179 quality-filtered sequencing reads that we assembled into 9035 contigs. Using these contigs and 15 794 length-filtered (greater than 200 bp) singletons, we identified 7762 transcripts that appear to be homologues of chicken genes. A specific BLAST search with an emphasis on immune genes found 308 homologous chicken genes that have immune function, including ten major histocompatibility complex-related genes located on chicken chromosome 16. We also identified 1300 expressed sequence tag microsatellites and were able to design suitable flanking primers for 526 of these. A preliminary test of the polymorphism of the microsatellites found 10 polymorphic microsatellites of the 102 tested. Genomic resources generated in this study should greatly benefit future ecological, evolutionary and conservation genetic studies on this species.

Habitat separation by sympatric forest grouse in Fennoscandia in relation to boreal forest succession

1993 ◽  
Vol 71 (7) ◽  
pp. 1303-1310 ◽  
Author(s):  
Jon E. Swenson ◽  
Per Angelstam
Keyword(s):  
Forest Succession ◽  
Deciduous Trees ◽  
Black Grouse ◽  
Forest Stands ◽  
Old Growth ◽  
Successional Stage ◽  
Hazel Grouse ◽  
Bonasa Bonasia ◽  
Successional Stages ◽  
Intensively Managed

Sympatric forest grouse in intensively managed conifer-dominated forests of the southern boreal zone in Sweden occupied different forest successional stages. Black grouse (Tetrao tetrix) selected forest stands 0 – 20 years old, hazel grouse (Bonasa bonasia) selected those 20 – 50 years old, and capercaillie (Tetrao urogallus) selected those ≥90 years old. Moreover, hazel grouse also selected stands with 1 – 10% deciduous trees, whereas capercaillie selected stands with no deciduous trees. The relative numbers of each grouse species were similar in two areas of intensively managed industrial forest, but differed in an area where forestry was less intensive and where forests had old-growth characteristics, i.e., they were old and multi-layered. Black grouse dominated in the intensively managed areas, whereas hazel grouse dominated in the less intensively managed area. We suggest that under natural conditions, black grouse inhabited the early-successional stages of forest following burns, hazel grouse inhabited the next, denser, successional stage and also old-growth spruce-dominated forests in fire refugia, and capercaillie inhabited stands of open, old, pine-dominated forest maintained by forest fire. The black grouse appears to be preadapted to the modern system of clearcut forest management. However, this system is clearly detrimental to the hazel grouse and capercaillie. To maintain all three species in a managed landscape, forest managers must strive to mimic more closely the natural variation in types and sizes of forest stands.

Reproductive Output, Population Structure and Cyclic Dynamics in Capercaillie, Black Grouse and Hazel Grouse

1997 ◽  
Vol 28 (1) ◽  
pp. 1 ◽  
Author(s):  
Jan Lindstrom ◽  
Esa Ranta ◽  
Mats Linden ◽  
Harto Linden
Keyword(s):  
Population Structure ◽  
Reproductive Output ◽  
Black Grouse ◽  
Hazel Grouse ◽  
Cyclic Dynamics

Some comments about observations and image processing of comet 29P/Schwassmann-Wachmann 1

1999 ◽  
Vol 173 ◽  
pp. 243-248
Author(s):  
D. Kubáček ◽  
A. Galád ◽  
A. Pravda
Keyword(s):  
Image Processing ◽  
Large Scale ◽  
Harvard College ◽  
Oak Ridge ◽  
Large Scale Structures ◽  
Short Period Comet ◽  
Short Period ◽  
Scale Structures ◽  
Harvard College Observatory ◽  
Period Comet

AbstractUnusual short-period comet 29P/Schwassmann-Wachmann 1 inspired many observers to explain its unpredictable outbursts. In this paper large scale structures and features from the inner part of the coma in time periods around outbursts are studied. CCD images were taken at Whipple Observatory, Mt. Hopkins, in 1989 and at Astronomical Observatory, Modra, from 1995 to 1998. Photographic plates of the comet were taken at Harvard College Observatory, Oak Ridge, from 1974 to 1982. The latter were digitized at first to apply the same techniques of image processing for optimizing the visibility of features in the coma during outbursts. Outbursts and coma structures show various shapes.

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