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Articles 391 - 420 of 566
Full-Text Articles in Environmental Policy
Wolf Population Dynamics, Todd K. Fuller, L. David Mech, Jean Fitts Cochrane
Wolf Population Dynamics, Todd K. Fuller, L. David Mech, Jean Fitts Cochrane
United States Geological Survey, Northern Prairie Wildlife Research Center: Publications
A LARGE, DARK WOLF poked his nose out of the pines in Yellowstone National Park as he thrust a broad foot deep into the snow and plowed ahead. Soon a second animal appeared, then another, and a fourth. A few minutes later, a pack of thirteen lanky wolves had filed out of the pines and onto the open hillside.
Wolf packs are the main social units of a wolf population. As numbers of wolves in packs change, so too, then, does the wolf population (Rausch 1967). Trying to understand the factors and mechanisms that affect these changes is what the …
Wolves: Behavior, Ecology, And Conservation: Photo Section Ii, Douglas W. Smith, L. David Mech, Isaac Babcock, Melissa Mccaw
Wolves: Behavior, Ecology, And Conservation: Photo Section Ii, Douglas W. Smith, L. David Mech, Isaac Babcock, Melissa Mccaw
United States Geological Survey, Northern Prairie Wildlife Research Center: Publications
Adult wolves are very attentive to the pups. Both parents feed and care for them. Any older siblings similarly participate in pup care and feeding. Kin selection is probably the best explanation for the latter behavior. Top: Photograph by Isaac Babcock. Bottom: Photograph by L. David Mech.
Wolf Interactions With Non-Prey, Warren B. Ballard, Ludwig N. Carbyn, Douglas W. Smith
Wolf Interactions With Non-Prey, Warren B. Ballard, Ludwig N. Carbyn, Douglas W. Smith
United States Geological Survey, Northern Prairie Wildlife Research Center: Publications
WOLVES SHARE THEIR ENVIRONMENT with many animals besides those that they prey on, and the nature of the interactions between wolves and these other creatures varies considerably. Some of these sympatric animals are fellow canids such as foxes, coyotes, and jackals. Others are large carnivores such as bears and cougars. In addition, ravens, eagles, wolverines, and a host of other birds and mammals interact with wolves, if only by feeding on the remains of their kills.
Conclusion, L. David Mech, Luigi Boitani
Conclusion, L. David Mech, Luigi Boitani
United States Geological Survey, Northern Prairie Wildlife Research Center: Publications
WOLVES CAN LIVE almost anywhere in the Northern Hemisphere, and almost everywhere they do, they are an issue. In the vast emptiness of the northern tundra or the Arabian desert, on the outskirts of a European town or in the safety of an American national park, in meager agricultural lands in India or mountains in rich Norway or Switzerland, wolves always attract people's attention. Wolves form a key part of many ecosystems, and they are considered charismatic creatures by most human cultures. Thus they polarize public opinion and make headlines year after year.
If we look back 6o years to …
Incidence Of Mink, Mustela Vison, And River Otter, Lutra Canadensis, In A Highly Urbanized Area, L. David Mech
Incidence Of Mink, Mustela Vison, And River Otter, Lutra Canadensis, In A Highly Urbanized Area, L. David Mech
United States Geological Survey, Northern Prairie Wildlife Research Center: Publications
Mink (Mustela vison) frequently inhabited or traversed a residential. business. and industrial part of the Twin Cities. Minnesota, with little water or natural vegetation. At least one River Otter (Lutra canadensis) also resided on a small pond on a golf course in the area for several winter months.
Proceedings Of The European Conference Black Grouse – Endangered Species Of Europe (September 8–12, 2003: Prague, Czech Republic), Petra Málková, Petr Procházka
Proceedings Of The European Conference Black Grouse – Endangered Species Of Europe (September 8–12, 2003: Prague, Czech Republic), Petra Málková, Petr Procházka
Galliformes Specialist Group and Affiliated Societies: Conference Proceedings
RSPB black grouse conservation work in north Scotland, Chris Donald and Dave O’Hara
Influences of habitat structure, climate, disturbances and predation on population dynamics of black grouse in the northern Ore Mountains, Sven Herzog and Torsten Krüger
Population fragmentation and genetic variability in European black grouse: A progress report, Jacob Höglund, David Baines, Jobs Karl Larsson, and Gernot Segelbacher
Black Grouse habitats in Poland, Robert Kamieniarz
Ecological requirements for black grouse: A case study in the Belgian Hautes-Fagnes, Christine Keulen, Yves Pieper, André Doyen, Olivier Charlet, Pascal Poncin, and Jean-Claude Ruwet
Climatic modelling of black grouse population dynamics: A game …
Clarifying The Status Of The Caucasian Black Grouse: Workshop Report, Ilse Storch
Clarifying The Status Of The Caucasian Black Grouse: Workshop Report, Ilse Storch
Galliformes Specialist Group and Affiliated Societies: Conference Proceedings
Clarifying the Status of the Caucasian Black Grouse: Workshop Report
Final version, October 2002
The GSG held a workshop on the Caucasian Black Grouse (CBG) on 21 August 2002 during the 9th International Grouse Symposium (IGS) in Beijing, China. The workshop’s objectives were:
· to bring together scientists from the CBG´s range countries, to enable them to meet with international grouse experts, and to strengthen their contacts with the GSG;
· to increase awareness and interest regarding the CBG in the international scientific community and among GSG members;
· to initiate concrete steps towards field surveys and research studies on …
Wpa News 69 (2002), World Pheasant Association
Wpa News 69 (2002), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (May 2002), number 69
Published by the World Pheasant Association
Tragopan: Newsletter Of The Wpa/Species Survival Commission/Birdlife Pheasant Specialist Group 16 (2002), World Pheasant Association, Birdlife International, Iucn Species Survival Commission Pheasant Specialist Group
Tragopan: Newsletter Of The Wpa/Species Survival Commission/Birdlife Pheasant Specialist Group 16 (2002), World Pheasant Association, Birdlife International, Iucn Species Survival Commission Pheasant Specialist Group
Galliformes Specialist Group and Affiliated Societies: Newsletters
Issue 16 (March 2002)
Editorial, Stuart Marsden
From the Chairman, Peter Garson
Cheer pheasant drawing, Dave Showler
Project roundup
News from PSG
Action Plan project review
Other news
Newly published
Research reports
Some notes on behaviour in golden pheasant Chrysolophus pictus, Liang Wei, Zheng Guangmei, Zhang Zhengwang, and Ding Changqing
Studies on habitat selection and home range of Reeves 's pheasant Syrmaticus reevesii using radiotracking techniques: Report on the progress of a WPA project, Zhang Zhengwang
Research on Sclater's monal in westem Yunnan, China: APA progress report, July to December 2001, Han Lianxian
The status and distribution of green peafowl …
Wpa News 70 (2002/2003), World Pheasant Association
Wpa News 70 (2002/2003), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (Winter 2002/2003), number 70
Published by the World Pheasant Association
Wpa News 68 (2002), World Pheasant Association
Wpa News 68 (2002), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (January 2002), number 68
Published by the World Pheasant Association
Annual Review Of The World Pheasant Association 2001/2002, World Pheasant Association
Annual Review Of The World Pheasant Association 2001/2002, World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Reports and Other Materials
Chairman of Trustees' report, Richard P. Howard
The way ahead, Dick Potts
Treasurer's report and accounts, Ian F. Hoggarth
Conservation activities in 2001/2002 (including South Asia Office), Philip J. K. McGowan and Rahul Kaul
Pheasant Specialist Group report, Peter J. Garson
Partridge, Quail and Francolin Specialist Group report, John P. Carroll
Grouse Specialist Group report, Ilse Storch
Megapode Specialist Grouse report, René W. R. J. Dekker
Cracid Specialist Group report, Daniel M. Brooks
Conservation Breeding Activities, Han Assink, John Corder, and Gary Robbins
Plight of prairie grouse in Kansas, R. J. Robel
Bruijn's brush-turkey observed in the wild for the …
Quail V: Proceedings Of The Fifth National Quail Symposium (January 23-27, 2002 : Corpus Christi, Texas), Stephen J. Demaso, William P. Kuvelsky Jr., Fidel Hernández, Michael E. Berger
Quail V: Proceedings Of The Fifth National Quail Symposium (January 23-27, 2002 : Corpus Christi, Texas), Stephen J. Demaso, William P. Kuvelsky Jr., Fidel Hernández, Michael E. Berger
Galliformes Specialist Group and Affiliated Societies: Conference Proceedings
PLENARY SESSION
Arizona Quail: Species in Jeopardy? Ron Engel-Wilson and William P. Kuvlesky, Jr.
Emerging Trends in Midwest Bobwhite Culture, Thomas V. Dailey
Quail Management: Issues, Concerns, and Solutions for Public and Private Lands: A Southeastern Perspective, L. Wes Burger
Rangewide Trends in Landuse and Northern Bobwhite Abundance: An Exploratory Analysis, Markus J. Peterson, X. Ben Wu, and Paikho Rho
Keynote Address: Ideas, Landscapes, and Conservation's New Frontier, Shane P. Mahoney
Banquet Remarks: Sustaining the 'Quail Wave' in the Southern Great Plains, Dale Rollins
IMPACTS OF DEPREDATION ON QUAIL
Coyotes: Friend or Foe of Northern Bobwhite in Southern Texas, Scott …
Wpa News 65 [66] (2001), World Pheasant Association
Wpa News 65 [66] (2001), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (November 2001), number 65 [66]
Published by the World Pheasant Association
Winter Severity And Wolf Predation On A Formerly Wolf-Free Elk Herd, L. David Mech, Douglas W. Smith, Kerry M. Murphy, Daniel R. Macnulty
Winter Severity And Wolf Predation On A Formerly Wolf-Free Elk Herd, L. David Mech, Douglas W. Smith, Kerry M. Murphy, Daniel R. Macnulty
United States Geological Survey, Northern Prairie Wildlife Research Center: Publications
We studied wolf (Canis lupus) predation on elk (Cervus elaphus) in Yellowstone National Park from 17 March to 15 April 1997 (severe winter conditions) and from 2 to 31 March 1998 (mild winter conditions) 2-3 years after wolves were reintroduced to the park. Elk composed 91% of 117 kills. Data comparisons for 1997 versus 1998 were: hunting success rate, 26% versus 15%; kill rate, 17.1 kg/wolf/day versus 6.1; percent of kill consumed in first day, 7 versus 86; percent femur marrow fat of adult kills, 27 versus 70; calf:adult ratios of kills, 2:33 versus 17:23; sex …
Wpa News 65 (2001), World Pheasant Association
Wpa News 65 (2001), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (May 2001), number 65
Published by the World Pheasant Association
Wpa News 64 (2001), World Pheasant Association
Wpa News 64 (2001), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (February 2001), number 64
Published by the World Pheasant Association
Grouse News 21-30 (2001-2005), World Pheasant Association International, Birdlife International, Species Survival Commission, Grouse Specialist Group
Grouse News 21-30 (2001-2005), World Pheasant Association International, Birdlife International, Species Survival Commission, Grouse Specialist Group
Galliformes Specialist Group and Affiliated Societies: Newsletters
Issue 21 (2001)
Chairman's column, Ilse Storch
Present distribution and numbers of black grouse in the Czech Republc, I. Malkova Petra, Stastny Karel, and Bejcek Vladimir
Capercaillie in the Czech Republic, Malkova Petra, Stastny Karel, and Bejcek Vladimir
Avalanche prevention causes disturbance of grouse around French ski stations, Emmanuel Menoni
New fencing material tested in France, Emmanuel Menoni
The fate of the black grouse, Ing. Roelof Heringa
Co Co Co Cocks, Michele Loneux
Update of number of capercaillie in the Vosges Mountains, Jean Poirot and Francoise Preiss
Use of Sandsage habitat by lesser prairie-chickens in Southwestern Kansas, Cristian Hagen. James …
Managing Minnesota's Recovered Wolves, L. David Mech
Managing Minnesota's Recovered Wolves, L. David Mech
United States Geological Survey, Northern Prairie Wildlife Research Center: Publications
The Minnesota wolf (Canis lupus) population was estimated by the Minnesota Department of Natural Resources at 2,450 during winter 1997-1998 and had increased at an average annual rate of 4.5°% since winter 1988-1989. The population may be removed from the federal endangered species list by 2002, and management would then return to the state. A federal recovery team recommended a population goal of 1,250-1,400 wolves for Minnesota, with none in the agricultural region. A plan approved by the Minnesota legislature, however, continues the protection of wolves, except for pet and livestock depredation control, for at least 5 years …
Boletín De El Iucn/Birdlife/Wpa Grupo De Especialistas En Crácidos 12-16 (2001-2003), Iucn, Birdlife International, Wpa Cracid Specialist Group
Boletín De El Iucn/Birdlife/Wpa Grupo De Especialistas En Crácidos 12-16 (2001-2003), Iucn, Birdlife International, Wpa Cracid Specialist Group
Galliformes Specialist Group and Affiliated Societies: Newsletters
Volume 12 (March 2001)
Recientes registros de crácidos de Tikal, Petén, Guatemala, con notas sobre su conservacion, Thomas M. Donegan
Recent records of cracids from Tikal, Petèn, Guatemala, with notes on their conservation, Thomas M. Donegan
El muitú (Crax fasciolata) como emblema de una actividad de ecoturismo en el norte Argentino, Emilio E. White
O mutum-penacho (Crax fasciolata) como símbolo de uma atividade de ecoturismo no norte da Argentina, Emilio E. White
The bare-faced curassow (Crax fasciolata) as an emblem of ecotourism activity in northern Argentina, Emilio E. White
Grants, Research opportunities, Interested in signing up? …
Annual Review Of The World Pheasant Association 2000/2001, World Pheasant Association
Annual Review Of The World Pheasant Association 2000/2001, World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Reports and Other Materials
President's message, Keith C. R. Howman
Chairman of Trustees' report, Richard P. Howard
Treasurer's annual report and accounts, Ian F. Hoggarth
Conservation Committee report, Philip J. K. McGowan
Strategic Development Committee report
Chapters and Affiliate reports
Pheasant Specialist Group report, Peter J. Garson
Partridge, Quail and Francolin Specialist Group report, John P. Carroll
Grouse Specialist Group report, Ilse Storch
Megapode Specialist Group report, René W. R. J. Dekker and Darryl N. Jones
Cracid Specialist Group report, Daniel M. Brooks
The new Conservation Breeding and Aviculture Group for WPA in the United Kingdom, Garry Robbins, Mike Cook, and Keith Chalmers-Watson
Frontal …
Wpa News 63 (2000), World Pheasant Association
Wpa News 63 (2000), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (November 2000), number 63
Published by the World Pheasant Association
Wpa News 62 (2000), World Pheasant Association
Wpa News 62 (2000), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (May 2000), number 62
Published by the World Pheasant Association
Air Quality And Shelterbelts: Odor Mitigation And Livestock Production, A Literature Review, John Tyndall, Joe Colletti
Air Quality And Shelterbelts: Odor Mitigation And Livestock Production, A Literature Review, John Tyndall, Joe Colletti
United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications
This literature review is focused on the potential for innovative use of trees and other vegetation to reduce the odor associated with livestock production. The goal is to examine available evidence to assess if trees and shelterbelts may: 1) be able to help control odor through physical and biological means, and 2) be an economically feasible technology for livestock producers as well as surrounding communities.
Wpa News 61 (2000), World Pheasant Association
Wpa News 61 (2000), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (February 2000), number 61
Published by the World Pheasant Association
Leadership In Wolf, Canis Lupus, Packs, L. David Mech
Leadership In Wolf, Canis Lupus, Packs, L. David Mech
United States Geological Survey, Northern Prairie Wildlife Research Center: Publications
I examine leadership in Wolf (Callis lupus) packs based on published observations and data gathered during summers from 1986 to 1998 studying a free-ranging pack of Wolves on Ellesmere Island that were habituated to my presence. The breeding male tended to initiate activities associated with foraging and travel, and the breeding female to initiate, and predominate in, pup care and protection. However, there was considerable overlap and interaction during these activities such that leadership could be considered a joint function. In packs with multiple breeders, quantitative information about leadership is needed.
Do Wolves Affect White-Tailed Buck Harvest In Northeastern Minnesota?, L. David Mech, Michael E. Nelson
Do Wolves Affect White-Tailed Buck Harvest In Northeastern Minnesota?, L. David Mech, Michael E. Nelson
United States Geological Survey, Northern Prairie Wildlife Research Center: Publications
We used simple linear regression to analyze 8-23 years of data on a wolf (Canis lupus) population and human harvest of white-tailed deer (Odocoileus virginianus) bucks in northeastern Minnesota to determine any effects of wolves on buck harvesting. Over the long term, wolves accounted for at least 14-22% inter-year variation in buck harvest in the region, but an unknown amount of variation in hunter effort have obscured any more precise estimate. For part of the area with poorest habitat, we found strong relationships (r2 = 0.66-0.84) between annual wolf numbers and buck harvests from 1988 …
Partridges, Quails, Francolins, Snowcocks, Guineafowl, And Turkeys Status Survey And Conservation Action Plan, 2000–2004, Richard A. Fuller, John P. Carroll, Philip J. K. Mcgowan, Wpa/Birdlife/Iuch-Ssc Partridge, Quail And Francolin Specialist Group
Partridges, Quails, Francolins, Snowcocks, Guineafowl, And Turkeys Status Survey And Conservation Action Plan, 2000–2004, Richard A. Fuller, John P. Carroll, Philip J. K. Mcgowan, Wpa/Birdlife/Iuch-Ssc Partridge, Quail And Francolin Specialist Group
Galliformes Specialist Group and Affiliated Societies: Reports and Other Materials
Executive Summary
This Action Plan covers the partridges, quails, francolins, snowcocks, guineafowl, and turkeys, a group of nearly 150 ground-dwelling gamebirds found in every continent apart from Antarctica. They live in a wide variety of habitats from tropical forests, high-altitude alpine zones, temperate forests, and open country of various kinds, to desert environments. Although they are very widespread, little is known about the species occurring outside Europe and North America. Several species are considered to be at grave risk of extinction, while others are so poorly known that it is difficult to evaluate their conservation needs. In 1995, the first …
Curassows, Guans And Chachalacas: Status Survey And Conservation Action Plan For Cracids 2000–2004 (With Spanish And Portuguese Translations), Daniel M. Brooks, Stuart D. Strahl
Curassows, Guans And Chachalacas: Status Survey And Conservation Action Plan For Cracids 2000–2004 (With Spanish And Portuguese Translations), Daniel M. Brooks, Stuart D. Strahl
Galliformes Specialist Group and Affiliated Societies: Reports and Other Materials
Cracids (curassows, guans and chachalacas) are the most threatened family of Neotropical birds, occurring in south Texas, Trinidad and Tobago, and all Latin American mainland countries except Chile. They are a primitive, ancestral family of gamebirds (Galliformes) that play an important role in the regeneration of tropical forests through seed dispersal and predation, yet half of all species are threatened by habitat destruction and hunting. The three most critically endangered species are the horned guan, Alagoas curassow, and Trinidad piping-guan, while the four most critically endangered subspecies are three subspecies of the helmeted curassow and the northeastern bare-faced curassow.
Cracids …
Agroforestry In The United States: Research And Technology Transfer Needs For The Next Millennium
Agroforestry In The United States: Research And Technology Transfer Needs For The Next Millennium
United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications
If society's needs and aspirations for forestderived goods, services, and amenities truely are to be met, we must find ways of augmenting traditional forestry by gleaning some portion of these benefits from agricultural lands. For example: windbreaks, riparian forest buffers, hybrid poplar trees, farm woodlots, and grazing/timber systems.