Sharp-tailed Grouse Breeding Success, Survival, and Site Selection in Relation to Habitat Measured at Multiple Scales PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Sharp-tailed Grouse Breeding Success, Survival, and Site Selection in Relation to Habitat Measured at Multiple Scales PDF full book. Access full book title Sharp-tailed Grouse Breeding Success, Survival, and Site Selection in Relation to Habitat Measured at Multiple Scales by Douglas Lee Manzer. Download full books in PDF and EPUB format.
Author: Douglas Lee Manzer
Publisher: Library and Archives Canada = Bibliothèque et Archives Canada
ISBN:
Category : Sharp-tailed grouse
Languages : en
Pages : 180
Get Book Here
Book Description
Author: Douglas Lee Manzer
Publisher: Library and Archives Canada = Bibliothèque et Archives Canada
ISBN:
Category : Sharp-tailed grouse
Languages : en
Pages : 180
Get Book Here
Book Description
Author: Brett K. Sandercock
Publisher: Univ of California Press
ISBN: 0520950577
Category : Science
Languages : en
Pages : 746
Get Book Here
Book Description
Grouse—an ecologically important group of birds that include capercaillie, prairie chickens, and ptarmigan—are distributed throughout the forests, grasslands, and tundra of Europe, Asia, and North America. Today, many grouse populations are in decline, and the conservation and management of these charismatic birds is becoming a global concern. This volume summarizes current knowledge of grouse biology in 25 chapters contributed by 80 researchers from field studies around the world. Organized in four sections—Spatial Ecology, Habitat Relationships, Population Biology, and Conservation and Management—the chapters offer important insights into spatial requirements, movements, and demography of grouse. Much of the research employs emerging tools in ecology that span biogeochemistry, molecular genetics, endocrinology, radio-telemetry, and remote sensing. The chapters explore topics including the impacts of climate change, energy development, and harvest, and give new evidence for life-history changes in response to human activities.
Author: Federation of Alberta Naturalists
Publisher: Nature Alberta
ISBN: 9780969613473
Category : Nature
Languages : en
Pages : 444
Get Book Here
Book Description
Author: Bart L. Prose
Publisher:
ISBN:
Category : Sharp-tailed grouse
Languages : en
Pages : 144
Get Book Here
Book Description
Selection of nesting habitat in relation to vegetation heterogeneity and spatial scale of analysis was studied for plains sharp-tailed grouse (Tympanuchus phasianellus jamesi) in the Nebraska Sandhills to test the nesting component of a Habitat Suitability Index model. I tested the validity of estimating nesting suitability from mean effective height (MEH) (height to which a graduated pole is completely obstructed) of dried herbage in early spring, without regard to spatial heterogeneity in MEH. New Local Variance (NLV), a blocked-quadrat method for estimating mean patch size, was more effective than Two-Term Local Quadrat Variance and coefficient of variation for quantifying vegetation heterogeneity. Smoothing transect data with a compound data smoother prior to NLV analyses facilitated interpretation of results and clarified MEH patchiness in plots of the data. MEH pattern was apparently influenced by topography, snow compaction, rodent burrowing,and grazing and trampling by cattle.
Author: Jeffrey S. Marks
Publisher:
ISBN:
Category : Birds
Languages : en
Pages : 144
Get Book Here
Book Description
Author: Kourtney Faith Stonehouse
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Richard Patrick Whitney
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author: Joël Potié
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
"The reproductive phenology and habitat requirements of sharp-tailed grouse (Tympanuchus phasianellus) are not well understood. Northern populations of sharp-tailed grouse (STGR) belonging to the Tympanuchus phasianellus caurus subspecies are particularly under-studied. Although the caurus subspecies is thought to be stable, beyond anecdotal sightings, little is known regarding STGR status or habitat requirements and tolerance to disturbance in the northern parts of its range. The present study focuses on a STGR population located in North-Central Yukon in and around the Klondike Goldfields. Female STGR were fitted with radio transmitters and monitored during the reproductive period over three study years (2015-2017) to quantify habitat use around identified lek sites during the nesting and brood-rearing periods, analyze the habitat selection of nesting and brood-rearing hens, and assess habitat effects on hatching and fledgling success. Among 41 radio-collared hens, nearly all attempted to nest (96.4% ± 2.5) and clutch size averaged 8.3 ± 2.1. Overall apparent nest success for all nests was 76.4% ± 1.9 (n = 39). Nest sites were situated where a shrub layer provided vertical cover and abundant bunchgrass understory provided horizontal cover. Survival was higher for early hatching nests in sites with fewer hummocks than later hatch nests with many hummocks. Brood rearing hens selected for habitats with mesic vegetation such as scrub birch and sedges, but also showed a preference for sites classified as dry rather than wet. Brood failure occurred less often within low elevation, sloping sites with abundant deadfall cover and more often within sites on south and east facing slopes with less deadfall. During both the nesting and brood rearing periods, hens did not select for shrub dominated sites equally; those with shrubs less than 2m in height were preferred over taller shrubs and avoidance increased as the successional stage progressed to maturing forest. Home range sizes (163.0 ± 52.9 ha, using 95% kernel density) were larger and distances traveled from the nest site to brood rearing habitat (1119.2 ± 187.9 m) were longer than previously described for STGR and other prairie grouse. Hen survival in the Klondike Goldfields during the reproductive period was 64.2% ± 6.2 (n = 70), with most mortality occurring during egg laying and incubation. The current research has helped advance our understanding of the phenological events, space use and habitat selection of an isolated populations of a lekking bird species in a resource development region, and characterize the importance, scale, and inter-relatedness of three major impacts - mining activity, fire history, and predators – on STGR survival and reproductive success in the Klondike Goldfields"--
Author:
Publisher:
ISBN:
Category : Grouse
Languages : en
Pages : 40
Get Book Here
Book Description
S2The Appalachian Cooperative Grouse Research Project (ACGRP) was a Multistate cooperative effort initiated in 1996 to investigate the apparent decline of ruffed grouse (Bonus umbellus) and improve management throughout the central and southern Appalachian region (i.e., parts of Ohio, Pennsylvania, Rhode Island, Kentucky, West Virginia, Virginia, and North Carolina, USA). Researchers have offered several hypotheses to explain the low abundance of ruffed grouse in the region, including low availability of early-successional forests due to changes in land use, additive harvest mortality, low productivity and recruitment, and nutritional stress. As part of the ACGRP, we investigated ruffed grouse population ecology. Our objectives were to estimate reproductive rates, estimate survival and cause-specific mortality rates, examine if ruffed grouse harvest in the Appalachian region is compensatory, and estimate ruffed grouse finite population growth. We trapped >3,000 ruffed grouse in autumn (Sep-Nov) and spring (Feb-Mar) from 1996 to September 2002 on 12 study areas. We determined the age and gender of each bird and fitted them with necklace-style radiotransmitters and released them at the trap site. We tracked ruffed grouse >- 2 times per week using handheld radiotelemetry equipment and gathered data on reproduction, recruitment, survival, and mortality. Ruffed grouse population dynamics in the Appalachian region differed from the central portion of the species' range (i.e., northern United States and Canada). Ruffed grouse in the Appalachian region had lower productivity and recruitment, but higher survival than reported for populations in the Great Lakes region and southern Canada. Population dynamics differed between oak (Quercus spp.)-hickory (Carya spp.) and mixed-mesophytic forest associations within the southern and central Appalachian region. Productivity and recruitment were lower in oak-hickory forests, but adult survival was higher than in mixed-mesophytic forests. Furthermore, ruffed grouse productivity and recruitment were more strongly related to hard mast (i.e., acorn) production in oak-hickory forests than in mixed-mesophytic forests. The leading cause of ruffed grouse mortality was avian predation (44% of known mortalities). Harvest mortality accounted for 12% of all known mortalities and appeared to be compensatory. Population models indicated ruffed grouse populations in the Appalachian region are declining ([lambda] = 0.78-0.95), but differences in model estimates highlighted the need for improved understanding of annual productivity and recruitment. We posit ruffed grouse in the Appalachian region exhibit a clinal population structure characterized by changes in life-history strategies. Changes in life history strategies are in response to gradual changes in forest structure, quality of food resources, snowfall and accumulation patterns, and predator communities. Management efforts should focus on creating a mosaic of forest stand ages across the landscape to intersperse habitat resources including nesting and brood cover, adult escape cover, roosting sites, and, most importantly, food resources. Land managers can intersperse habitat resources through a combination of?c1earcutting, shelterwood harvest, group selection, and timber stand improvement including various thinnings and prescribed fire). Managers should maintain current ruffed grouse harvest rates while providing high quality hunting opportunities. We define high quality hunting as low hunting pressure, low vehicle traffic, and high flush rates. Managers can provide high quality hunting opportunities through use of road closures in conjunction with habitat management.S3.
Author: Bart L. Prose
Publisher:
ISBN:
Category : Columbian sharp-tailed grouse
Languages : en
Pages : 48
Get Book Here
Book Description
