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Lake Erie walleye population structure and stock discrimination methodsChen, Kuan-Yu 29 December 2016 (has links)
No description available.
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Methods in health assessment of freshwater mussels, Amblema plicata and Quadrula sppValentine, K. Hope 27 January 2011 (has links)
No description available.
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Survival and Habitat Use of Non-breeding Northern Bobwhites on Private Lands in OhioJanke, Adam K. 16 December 2011 (has links)
No description available.
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Characterizing the Decision Process of Land Managers when Managing for Endangered Species of Fire Dependent Ecosystems: The Case of the Kirtland’s warbler (Septophaga kirtlandii Baird)Myer, Mary Gwyneth 19 July 2012 (has links)
No description available.
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Factors related to bird collisions with buildings along the coast of Lake Erie.Lessin, Leandro Marcos 22 July 2022 (has links)
No description available.
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The impacts of habitat characteristics on the conservation of a forest-associated amphibianWetsch, Olivia 26 July 2022 (has links)
No description available.
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Approaches to management effectiveness in state fish and wildlife agenciesMcMullin, Steve L. 22 May 2007 (has links)
Agency directors, program administrators and planners as well as U. S. Fish and Wildlife Service regional federal aid supervisors provided input that defined 22 factors considered most important in determining management effectiveness of state fish and wildlife agencies. I grouped the factors into the following six categories: public support and awareness, conflict resolution, politics, planning and funding, agency management and personnel. State agency directors, commissioners and legislators ranked the factors.
In cooperation with the U. S. Fish and Wildlife Service and Organization of Wildlife Planners, I conducted case studies of nine state fish and wildlife agencies widely recognized by their peers as being particularly effective relative to the identified factors. Questionnaires and interviews with 845 agency members and constituents revealed effective fish and wildlife agencies had much in common with the excellent companies described by Peters and Waterman (1982) in In Search of Excellence. Effective agencies were proactive in dealing with issues and frequently among the nation's leading agencies in dealing with issues of national scope. Effective agencies used a variety of techniques to understand public desires and involve the public in making important decisions. Effective agencies grant their employees much freedom to make decisions and try new ideas without fear of punishment for making mistakes. They are committed to the personal development of employees. Effective agencies are good planners, with well defined missions and goals. Personal missions of employees are highly congruent with agency missions, resulting ina missionary-like zeal for their work. Effective agencies have a strong biological basis for their decisions and maintain credibility by balancing biological factors with public opinion. Effective agencies have stable political environments and experienced, enlightened resource management professionals as their leaders. Leaders emphasize participative decision making and teamwork. Finally, effective agencies have strong public support and are effective in mobilizing that support when important policy decisions are made. Many specific examples that illustrate the characteristics of effective agencies are discussed. / Ph. D.
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Floral richness inventory of an eastern U.S. forestMason, Nancy A. 16 June 2009 (has links)
Two watersheds on the southern end of Havens State Wildlife Management Area, Roanoke County, Virginia, were sampled for vascular plant species richness. Two-hundred and forty-eight species were identified. Three methods of sampling for species richness in eastern forests were compared: timed-search meanders, belt transects, and plots. Meanders and transects located more species in the same amount of time as plots. Plot sampling encompassed only two-thirds of the richness known from the site.
Species-area and species-effort relationships were described by exponential models (number of species = In (area + 1), and number of species = In (time + 1)). Models were used to predict numbers of species which might have been found had more area been sampled or had more time been spent searching. Species-area models yielded more conservative, and probably more accurate, predictions than species-time models. Predictions of species numbers were reasonable for areas as large as 60 ha, but were rather large for areas the size of Havens (2800 ha).
Sufficiency of search effort was judged using species-area and species-effort curves. However, it was difficult to tell whether the curves approached horizontal or not. Therefore, this was not a good technique to judge sampling adequacy.
Species composition observed by each of the three methods was different. Composition of species lists was 65% similar between meanders and transects, and only 51-58% similar between plots and other methods. These figures were within an expected range. A combination of two methods or repeated meanders was recommended in order to identify a higher proportion of the species present.
Seasonal and observer differences, and the effect of learning and taxonomy on richness estimates were discussed. / Master of Science
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The impact of pastoral farming and wildlife management practices on lion-livestock interactions in the Kgalagadi-South region of BotswanaVan der Merwe, Sarel Johannes January 2009 (has links)
Thesis (D. Tech.) - Central University of Technology, Free State, 2009 / All over the African continent south of the Sahara Desert, African lion numbers are plummeting to levels where, over large areas of their remaining distribution range, extinction has become a real threat. The main reason for the decreasing numbers is the increasing conflict between livestock farmers and lions. Lions are forced to kill livestock where their natural prey has been squeezed out by livestock and associated farming practices, and the farmers find it necessary to protect their livelihoods, often through the indiscriminate killing of lions.
In the Kgalagadi-South region of Botswana, lion/livestock interactions present a challenge to livestock owners and wildlife managers alike. The relatively low ecological carrying capacity and occupied lion habitats in the Kgalagadi Transfrontier Park (KTP) force some expelled young adult and sub-adult lions southwards into the adjoining Wildlife Management Area (WMA) KD/15, which separates the KTP and the communal grazing area. This WMA most likely also contains resident prides. Some of these predators sporadically enter the livestock grazing area. Similarly, large stock often enters the WMA. It is mostly these boundary transgressions that result in livestock killing, and the reaction of livestock owners often leads to the killing of lions.
To gather information concerning the nature and extent of the situation, two questionnaires were prepared with the assistance of the Department of Biostatistics of the University of the Free State, South Africa. One questionnaire targeted livestock owners while the other was aimed at wildlife officials of the Department of Wildlife and National Parks in Botswana and SANParks in South Africa. Both covered the five-year period 2002-2006. A trial run was carried out to adjust to problem-specific circumstances before fieldwork commenced. Fieldwork was done during four consecutive seasons – in January, February, April and December 2007. Thirty livestock respondents and 13 wildlife officials were interviewed during the first two excursions into the study area. The third visit was to plot the cut-line between the WMA and the grazing area (by means of a Global Positioning System or GPS) and to make first-hand observations regarding movement over the cut-line. During all four visits the environmental (including grazing) conditions and density and distribution of wildlife and stock were observed in both the WMA and the grazing areas.
The information gathered points towards a seemingly unsolvable situation. The exceptionally high daytime temperatures and food scarcity, brought about by erratic rainfall, overgrazing near boreholes, generally low carrying capacity and low phosphorus (P) levels, force large stock, i.e. cattle, horses, donkeys and mules, to graze far away from the safety of the cattle-posts during the cool hours of the night, thus making kraaling impractical. Such circumstances enhance exposure to lion predation especially in or near the WMA and the KTP fence. Some lions also penetrate deep into the grazing areas, especially in the arid western part of the study area.
This study revealed certain weaknesses in current wildlife and livestock management practices in the study area, the sum of which put both farmers and the lion population under extreme pressure. Most of these shortcomings can be rectified without drastic invasive methods. Such adjustments can result in improved livestock and wildlife utilisation and protection of the lions. For example: the placement of mixed phosphorus and salt licks near cattle-posts to fulfil the need for vital micro and macro elements; addressing unnecessary livestock losses, which contribute to a lower income and less tolerance towards predation (e.g. botulism, which may stem from stock chewing on bones in their desire for more phosphorus, and losses to black-backed jackal, Canis mesomelas, in poorly maintained kraals); more drinking troughs at boreholes to prevent unnecessary shoving and minimise energy waste; and the introduction of more bulls to herds to increase the calving percentage.
The study further concluded that there is little reason why stockowners should consider protecting lions. It suggests that significant value can be added to the wildlife (and the protection of lions) in the specific area by making farmers and other local residents share in the relatively untapped ecotourism potential of the area.
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The statistics of helicopter total counts of large ungulates in sourish mixed bushveld, northwest arid bushveld and mopane veld, Republic of South AfricaReilly, Brian Kevin 12 1900 (has links)
Dissertation (PhD)--Stellenbosch University, 2000. / ENGLISH ABSTRACT: The use of helicopters has become almost universally accepted as the method of
choice in the enumeration of large ungulates in Southern Africa. In most cases
decisions affecting management of these populations are made based on a
single count result. In all these instances the within technique variance is
ignored, often leading to decisions based on type I or type II statistical errors
where the within technique variance is misconstrued as the population change.
Many studies have investigated the issue of accuracy of counting methods and a
few have quoted precision values for various methods. Very few have, however,
investigated power and those extant have approached the problem from a
prospective point of view and predicted power values. This study has made use
of replicated counts from 12 sites of the original 23 in four vegetation types of the
then Transvaal Province. The study sites vary in terms of size and all counts
were undertaken with an experienced, trained team in which only four observers
were used. A comprehensive post hoc analysis of the results of the field surveys
shows precision and power to vary widely according to species and vegetation
type and concludes that gamecounting results are largely site specific. A decline
in observations during the course of four hours of survey is demonstrated and
although the exact cause cannot be determined, correction factors have been
constructed for two vegetation types. Observers are shown to differ from one
another in observation profile during the course of surveys. This study
demonstrates, describes and quantifies the existence of several phenomena
suspected to exist by experienced game counters, biologists and wildlife
managers and makes proposals in terms of improving the data returned from
expensive aerial surveys. / AFRIKAANSE OPSOMMING: In Suider-Afrika word die gebruik van 'n helikopter vir die tel van hoefdiere byna
algemeen aanvaar as die metode wat voorkeur geniet. In meeste gevalle word
besluitnemings rakende die bestuur van hierdie populasies gebaseer op die
resultate van 'n enkele telling. In al die gevalle word tegniekverwante afwykings
buite rekening gelaat en dit het die gevolg dat bestuursbesluite gebaseer word
op tipe I en tipe II statistiese foute, en dit lei weer op hulle beurt dat tegniekverwante
afwykings verkeerdelik geïnterpreteer word as die rede vir
veranderings in die bevolkings. Verskeie studies het al die feitegeskil omtrent die
akkuraatheid van telmetodes ondersoek en sommige het herhaalbaarheidswaardes
vir die verskillende metodes aangehaal. Baie min het egter statistiese
mag ondersoek en die wat dit wel gedoen het, het prospektiewe magsanalise as
uitgangspunt gebruik en statistiese magwaardes voorspelom die probleem aan
te spreek. Hierdie studie het gebruik gemaak van herhaalde tellings van 12
gebiede uit die oorspronklike 23 in vier veldtipes geleë in die ou Transvaal
Provinsie. Die studiegebiede verskil in groottes. Alle tellings is deur 'n
bekwaamde opgeleide span gedoen wat slegs vier waarnemers ingesluit het. 'n
Omvattende post hoc analise van die resultate van die veldopnames dui aan dat
herhaalbaarheid en statistiese mag baie varieer met betrekking tot spesies en veldtipes en word die gevolgtrekking gemaak dat wildtellingsresultate grootliks
gebiedsgebonde is. In Afname in waarnemings gedurende die verloop van In
vier uuropname, is waargeneem en alhoewel die ware oorsaak nie vasgestel kan
word nie, is korreksiefaktore bereken vir twee veldtipes. Dit blyk dat waarnemers
van mekaar verskil het met betrekking tot hul waarnemingsprofiele gedurende
die verloop van die opnames. Hierdie studie dui aan, beskryf en kwantifiseer die
bestaan van verskeie verskynsels wat vermoedelik bestaan het by ervare
wildtelIers, bioloë en wildlewebestuurders en maak voorstelle met betrekking tot
die verbetering van data wat tydens duur lugopnames ingesamel word.
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