scholarly journals Habitat selection of Capercaillie (Tetrao urogallus) displaying males: Case from Rila Mountain, Bulgaria

2019 ◽  
Vol 2 ◽  
Author(s):  
Dimitar Plachiyski ◽  
Georgi Popgeorgiev ◽  
Stefan Avramov ◽  
Yurii Kornilev
Keyword(s):  
Habitat Selection ◽  
Home Range ◽  
Scots Pine ◽  
Vegetation Cover ◽  
Habitat Management ◽  
Categorical Variables ◽  
Tetrao Urogallus ◽  
Adult Males ◽  
Convex Polygons ◽  
Selection Of

Current habitat management of the peripheral, regionally unique, and isolated Balkan capercaillie Tetrao urogallus rudolfi Dombrowski, 1912 meta-population in Bulgaria is based on obsolete knowledge of the spatial requirements of the species. Thus, we studied the habitat availability and the patterns of use by Capercaillie adult males, at the home range scale to inform and contribute to the conservation-oriented management of the threatened subspecies and its habitats. The field study was conducted during 2014–2015 in the northeastern part of Rila Mtn., Southwestern Bulgaria. Using GPS tags (“Bird 2A”, e-obs Digital Telemetry, Grünwald, Germany), a total of 38,640 GPS fixes from 3 displaying males, associated with one lek were gained. On this basis, we calculated annual and seasonal Minimum Convex Polygons (MCP), traditionally used as a measure of the maximum area of activity. Capercaillie habitat preference was computed using Manly’s habitat selection ratios (w), design III, combined with 90% Bonferroni simultaneous confidence intervals. To calculate habitat selection, we determined surface (Steepness and Exposure), forest stand succession and vegetation cover categorical variables. The habitat and surface layers was rasterized into 8 m square pixels. At the home range (MCP) scale, tagged roosters used vegetation cover non-randomly (annual: Khi2L=5738.89, df=14, p<0.001; winter: Khi2L=3773.28, df=13, p<0.001; summer: Khi2L=3646.32, df=14, p<0.001), and preferred forests dominated by Scots pine and Macedonian pine, such as the annual selection of Scots pine and summer selection of Macedonian pine are significantly different. In terms of forest stage succession, roosters used forest stages non-randomly (annual: Khi2L=3492.57, df=8, p<0.001; winter: Khi2L=2075.18, df=8, p<0.001; summer: Khi2L=1670.1, df=6, p<0.001), and demonstrated clear avoidance of forests stands in age classes: “0 to 40” and “41 to 80” years within the summer and annual ranges. The roosters demonstrated significant preference for southeastern exposure during the winter and annually, and significant overall avoidance of northern exposure, as well as avoidance of north-eastern aspect during the winter and south aspect during the summer (annual: Khi2L=4671.87, df=18, p<0.001; winter: Khi2L=3909.04, df=16, p<0.001; summer: hi2L=3095.84, df=18, p<0.001). The slope class “63.1 to 73o” was not used. In the summer, Capercaillie males significantly preferred slopes within the class “27.1 to 36o” and avoided the classes “0 to 9o”, “9.1 to 18o” and “54.1 to 63o”. The birds also demonstrated significant avoidance of flat terrains within the “0 to 9o” class annually (annual: Khi2L=608.24, df=17, p<0.001; winter: Khi2L=1148.37, df=16, p<0.001; summer: Khi2L=906.54, df=17, p<0.001).

scholarly journals Investigating Home Range, Movement Pattern, and Habitat Selection of Bar-headed Geese during Breeding Season at Qinghai Lake, China

Animals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 182 ◽  
Author(s):  
Ruobing Zheng ◽  
Lacy Smith ◽  
Diann Prosser ◽  
John Takekawa ◽  
Scott Newman ◽  
...  
Keyword(s):  
Habitat Selection ◽  
Home Range ◽  
Breeding Season ◽  
Movement Ecology ◽  
Movement Pattern ◽  
Qinghai Lake ◽  
Important Species ◽  
Central Asian ◽  
Anser Indicus ◽  
Selection Of

The Bar-headed Goose is the only true goose species or Anserinae to migrate solely within the Central Asian Flyway, and thus, it is an ideal species for observing the effects of both land use and climate change throughout the flyway. In this paper, we investigate the home range, movement pattern, and habitat selection of Bar-headed Geese (Anser indicus) during the breeding season at Qinghai Lake, which is one of their largest breeding areas and a major migration staging area in the flyway. We identified several areas used by the geese during the breeding season along the shoreline of Qinghai Lake and found that most geese had more than one core use area and daily movements that provided insight into their breeding activity. We also observed the intensive use of specific wetlands and habitats near Qinghai Lake. These data provide interesting insights into the movement ecology of this important species and also provide critical information for managers seeking to understand and respond to conservation concerns threatening Bar-headed Geese, such as landscape and habitat changes.

scholarly journals Selection of foraging habitat and diet of the Hoopoe Upupa epops in the mosaic-like cultural landscape of Goričko (NE Slovenia)

Acrocephalus ◽  
2015 ◽  
Vol 36 (166-167) ◽  
pp. 109-132
Author(s):  
Mojca Podletnik ◽  
Damijan Denac
Keyword(s):  
Home Range ◽  
Agricultural Landscape ◽  
Population Decline ◽  
Home Range Size ◽  
Range Size ◽  
Foraging Habitat ◽  
Convex Polygons ◽  
Upupa Epops ◽  
Mole Crickets ◽  
Selection Of

In 2012 and 2013, the selection of foraging habitats and the diet of the Hoopoe Upupa epops were studied in the Goričko area, where a significant population decline of the species has been recorded in the past 15 years. Goričko is an area with a well-preserved traditional mosaic-like agricultural landscape very rich in biodiversity which, however, is disappearing. The diet was determined using automatic camera recordings of prey brought to chicks by parents. Mole crickets Gryllotalpa gryllotalpa were the most dominant prey (35.4% frequency and 81.3% biomass of prey), followed by Scarab beetles larvae Scarabaeidae, caterpillars Lepidoptera larvae and True flies Diptera. Feeding frequency was highest in the period of most intensive chick growth (between 8 and 21 days of age). Selection of foraging habitat was researched by observation of birds during foraging. Hoopoes foraged mostly in mown meadows and grassy courtyards and, to a lesser extent, on sandy cart tracks and road edges. These habitats were characterized by low vegetation and patches of bare ground that enabled Hoopoes to forage efficiently. Home range size was determined using minimum convex polygons. The maximum home range size was between 42.9 and 57.7 ha, while the percentage of foraging habitats within the home range did not exceed 18%. Based on our results, we propose the following measures for effective Hoopoe conservation in the area: maintaining the present range of existing unimproved meadows, stopping the conversion of meadows into fields, restoring fields to meadows, prohibiting the use of pesticides targeting Mole crickets.

Breeding-Season Survival, Home-Range Size, and Habitat Selection of Female Bachman's Sparrows

2021 ◽  
Vol 20 (1) ◽  
Author(s):  
Daniel Y. Choi ◽  
Alexander C. Fish ◽  
Christopher E. Moorman ◽  
Christopher S. DePerno ◽  
Jessica M. Schillaci
Keyword(s):  
Habitat Selection ◽  
Home Range ◽  
Breeding Season ◽  
Home Range Size ◽  
Range Size ◽  
Selection Of

Home range and habitat selection of female mountain nyalas (Tragelaphus buxtoni) in the human-dominated landscape of the Ethiopian Highlands

2022 ◽  
Author(s):  
Anagaw Atickem ◽  
Matthias Klapproth ◽  
Martha Fischer ◽  
Dietmar Zinner ◽  
Leif Egil Loe
Keyword(s):  
Habitat Selection ◽  
Home Range ◽  
Ethiopian Highlands ◽  
Selection Of

Anadromous Sturgeons: Habitats, Threats, and Management

2007 ◽  
Keyword(s):  
Habitat Selection ◽  
Home Range ◽  
Atlantic Sturgeon ◽  
Lawrence Estuary ◽  
Early Juvenile ◽  
Salt Wedge ◽  
Sandy Substrate ◽  
Core Areas ◽  
St Lawrence Estuary ◽  
Selection Of

<em>Abstract</em>.—Space use and habitat selection of early juvenile Atlantic sturgeon <em>Acipenser oxyrinchus</em> have been little studied and remain largely unknown throughout the species’ range. In 2000–2002, survey trawling, ultrasonic telemetry, benthos sampling, and hydrodynamic modeling were used to determine the summer movement patterns, home range size, and habitat use and selection of early juvenile Atlantic sturgeon in the St. Lawrence estuary. Sonic-tagged Atlantic sturgeon, assumed to be age 2 based on their size, used a global area estimated at 76 km2 that included two main core areas. Individual summer home range sizes varied from 1 to 8 km2, but core areas were generally smaller than 1 km2. The mean daily distance traveled ranged from 0.4 to 13.5 km/d and was significantly related to sturgeon size. Fish were located mostly in freshwater relatively close to the salt wedge boundary and far from the shore, intertidal zones, and islands. They mostly used the 6–10-m depth range relatively close to a channel, in areas with low bottom current velocities, and over silt–clay substrates. Salinity and distance from the salt wedge were the two most important variables explaining their habitat selection. Age-0 Atlantic sturgeon used similar depth ranges, bottom salinities, and current velocities, but occupied mainly sandy substrate. Management implications of these results are discussed in relation to the impact of dredging and sediment disposal operations in the St. Lawrence estuary.

Home range and habitat selection of pampas deer

2008 ◽  
Vol 276 (1) ◽  
pp. 95-102 ◽  
Author(s):  
A. R. Vila ◽  
M. S. Beade ◽  
D. Barrios Lamunière
Keyword(s):  
Habitat Selection ◽  
Home Range ◽  
Selection Of

scholarly journals Distribution and Habitat Selection of Grey Francolin (Francolinus Pondicerianus) in Swegali Game Reserve District Swat, Khyber Pakhtunkhwa, Pakistan

2020 ◽  
Vol 7 (4) ◽  
pp. 27-32
Author(s):  
FAZAL BAQI
Keyword(s):  
Habitat Selection ◽  
Habitat Management ◽  
Marginal Lands ◽  
Policy Makers ◽  
Management Interventions ◽  
Game Reserve ◽  
Chi Squared ◽  
Line Transects ◽  
Selection Of ◽  
Study Species

Animals use some habitats and quit others. It is essential to examine resource which is of great interest to the animal for its survival. Distribution and habitat selection of Grey Francolin was examined in Swegali game reserve during June 2007. Twelve line transects 200 meters wide and average 3.73 kilometers long were laid down randomly for collection of data from 06h00-20h00 and observed 58 Grey francolins singly or in pairs. Distributed of Grey francolin was observed in three of the available six habitat types including woody ravines, shrub land and agricultural fields. Chi-squared test showed that Grey francolin displayed significant habitat selection and highly significant preference for woody ravines, northerly aspects and foraged in the morning and evening, a slight drag to the afternoon was also observed. The study can contribute to planning of management interventions for the study species and its preferred habitats. It might assist policy makers to devise policies pertaining to agriculture, study species and their habitats to mitigate encroachment into marginal lands for agriculture, human settlements, use of pesticides and unregulated hunting, assessment of the effects of resource use on wild populations, planning and policy decisions for habitat management and harvest levels.

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