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Dissertations / Theses on the topic 'Earthworms Population viability analysis'

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Published: 4 June 2021

Last updated: 7 February 2022

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1

Ramula, Satu. "Population viability analysis for plants : practical recommendations and applications." Doctoral thesis, Stockholm : Department of Botany, Stockholm University, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-845.

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2

Hartup, Wendi Winter. "Assessing persistence of two rare darter species using population viability analysis models." Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Summer/master's/HARTUP_WENDI_17.pdf.

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3

Strem, Rosa I. "Population viability analysis of the blue-throated macaw (Ara glaucogularis) using individual-based and cohort-based PVA programs." Bowling Green, Ohio : Bowling Green State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1219175814.

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4

Cobanoglu, Aziz Emre. "Identification Of Demographic Structure And Population Viability Analysis Of Gazella Subgutturosa In Sanliurfa." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611676/index.pdf.

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Goitered gazelle (Gazella subgutturosa) is an Asian antelope species and it is classified as Vulnerable by IUCN. They have an economic, esthetic and cultural value<br>therefore, they had been hunted and domesticated for a long time. Additional human disturbance over years nearly led goitered gazelle populations in Turkey to extinction. Today in Turkey, only natural population of goitered gazelle lives in Sanlurfa. In this theses, demographic structure and population parameters of natural population goitered gazelle in Sanliurfa is studied. Line transect and regular surveys are performed to co

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5

Wakamiya, Sarah M. "A habitat and population viability analysis for potential peregrine falcon reintroductions in southern Illinois /." Available to subscribers only, 2008. http://proquest.umi.com/pqdweb?did=1650505341&sid=3&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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6

Robinson, Christopher. "Metapopulation viability of swamp rabbits (Sylvilagus aquaticus) in southern Illinois." OpenSIUC, 2013. https://opensiuc.lib.siu.edu/theses/1282.

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Swamp rabbits (Sylvilagus aquaticus) in southern Illinois exist as a metapopulation due to loss and fragmentation of the bottomland hardwood forests in which they live, making their persistence in the state uncertain. I ran a spatially-explicit population viability analysis (PVA) on the metapopulation, using a habitat suitability map I created and life history parameters drawn from the literature. I varied parameters related to reproduction, survival, catastrophes, dispersal, and carrying capacity from 50 to 150% of the initial value of each parameter to compare their effects on extinction ris

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7

Colteaux, Benjamin C. "The Status of Snapping Turtles (Chelydra serpentina) in Virginia: Population Viability, Demography, Regulatory Analysis, and Conservation." VCU Scholars Compass, 2017. https://scholarscompass.vcu.edu/etd/5162.

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Snapping turtles (Chelydra serpentina) are being harvested in unprecedented numbers in the United States (US) to meet the needs of international markets. Over three million live snapping turtles from farm and wild caught stock were exported from the US to Asia in 2012-14 alone. In the Commonwealth of Virginia, records indicate that 29,860 snapping turtles were commercially harvested between 2000 and 2015. Size limits are often used to regulate harvest pressure in snapping turtles and other game species. I analyzed the historic harvest of eleven US states to test the efficacy of minimum-size li

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Kappler, Rachel Hope. "Exploring the Population Viability of Green Ash (Fraxinus pennsylvanica) with a Stage-Based Model." Bowling Green State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1528132089275356.

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9

Muiznieks, Britta Dace. "Population viability analysis of Puerto Rican parrots an assessment of its current status and prognosis for recovery /." Connect to this title online, 2003. http://www.lib.ncsu.edu/theses/available/etd-06192003-121313/unrestricted/etd.pdf.

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10

Hagen, Christian Andrew. "A demographic analysis of lesser prairie-chicken populations in southwestern Kansas : survival, population viability, and habitat use /." Search for this dissertation online, 2003. http://wwwlib.umi.com/cr/ksu/main.

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11

Barnes, Jami R. "An Integrative Approach to Conservation of the Crested Caracara (Caracara Cheriway)in Florida: Linking Demographic and Habitat Modeling for Prioritization." Bowling Green, Ohio : Bowling Green State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1182527612.

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12

Strem, Cuellar Rosa Ines. "Population Viability Analysis of the Bule-Throated Macaw (Ara glaucogularis) Using Individual-Based and Cohort-Based PVA Programs." Bowling Green State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1219175814.

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Kaye, Thomas N. "Population viability analysis of endangered plant species an evaluation of stochastic methods and an application to a rare prairie plant /." Connect to this title online, 2001. http://fresc.usgs.gov/products/thesis/kaye/thesis.html.

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14

Conry, Danielle Shanè. "Population status and habitat use of Indian Ocean humpback dolphins (sousa plumbea) along the south coast of South Africa." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/15556.

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Long-lived, top-level predators, such as some marine mammals, serve as important indicators of ecosystem health. Assessing the abundance and habitat use of such marine top predators is essential for the formulation of effective conservation and management actions. There is considerable concern over the viability of small humpback dolphin opulations across a global scale and a number of studies have raised concerns over their vulnerability to extinction. In light of the recent uplisting of Indian Ocean humpback dolphins (Sousa plumbea) to ‘Endangered’ on the South African Red Data list, there i

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15

Campbell, Richard. "Demography and population genetic structure of the Australian sea lion, neophoca cinerea." University of Western Australia. School of Animal Biology, 2003. http://theses.library.uwa.edu.au/adt-WU2005.0058.

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The Australian sea lion, Neophoca cinerea, is Australia?s only endemic pinniped, and one of the rarest sea lions in the world. This species suffered localised extinction events, and a probable population decline during the commercial sealing era of the 18th to 20th centuries. This species also has a unique reproductive cycle and breeding system compared with all other pinnipeds. Unlike the usual annual, synchronous cycle, this species has a 17.5 month breeding cycle which is asynchronous across its range. Small groups of proximate colonies appear to breed synchronously, but otherwise the timin

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Tucek, Jenny Bianka. "Comparison of the population growth potential of South African loggerhead (Caretta caretta) and leatherback (Dermochelys coriacea) sea turtles." Thesis, Nelson Mandela Metropolitan University, 2014. http://hdl.handle.net/10948/5032.

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A beach conservation programme protecting nesting loggerhead (Caretta caretta) and leatherback (Dermochelys coriacea) sea turtles in South Africa was started in 1963. As initial numbers of nesting females were low for both species (107 loggerheads and 24 leatherbacks) it was proposed that the protection of eggs, hatchlings and nesting females along the nesting beach would induce population growth and prohibit local extinction. Today, 50 years later, the loggerhead population exceeds 650 females per annum, whereas the leatherback population counts about 65 nesting females per year. The trend fo

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17

Säterberg, Torbjörn. "Minimum Ecologically Viable Populations : Risk assessment from a multispecies perspective." Thesis, Linköping University, Department of Physics, Chemistry and Biology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-18959.

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<p> </p><p> </p><p> </p><p>The extinction risk of threatened species has traditionally been assessed by the use of tools of Population Viability Analysis (PVA). Species interactions, however, have seldom been accounted for in PVA:s. The omission of species interactions in risk assessments may further lead to serious mistakes when setting target sizes of populations. Even a slight abundance decrease of a target species may result in changes of the community structure; in the worst case leading to a highly impoverished community. Of critical importance to conservation is therefore the question o

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18

Carvalho, Catarina Silva. "Role of climate on barn owls road-kill likelihood and the effect on population viability in future climate change." Master's thesis, Universidade de Aveiro, 2016. http://hdl.handle.net/10773/16084.

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Mestrado em Ecologia Aplicada<br>Roads represent a new source of mortality due to animal-vehicle risk of collision threatening log-term populations’ viability. Risk of road-kill depends on species sensitivity to roads and their specific life-history traits. The risk of road mortality for each species depends on the characteristics of roads and bioecological characteristics of the species. In this study we intend to know the importance of climatic parameters (temperature and precipitation) together with traffic and life history traits and understand the role of drought in barn owl population vi

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19

Klok, Trijntje Christina. "A quest for the role of habitat quality in nature conservation applications of population dynamical models in viability analysis and risk assessment /." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2000. http://dare.uva.nl/document/55182.

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LaFever, David Howard. "Population modeling in conservation planning of the Lower Keys marsh rabbit." Texas A&M University, 2006. http://hdl.handle.net/1969.1/4402.

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Rapid development and urbanization of the Lower Florida Keys in the last 30 years has fragmented the habitat of the Lower Keys marsh rabbit (Sylvilagus palustris hefneri) and threatened it with extinction. Current threats exist at multiple spatiotemporal scales and include threats due to development, invasive species, and global climate change. On Boca Chica Key, the Lower Keys marsh rabbit (LKMR) exists as a metapopulation on Naval Air Station-Key West (NASKW). I conducted a population viability analysis to determine the metapopulation's risk of extinction under multiple management scenarios

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21

Agzitemiz, Mehmet Melih. "Study Of Effects Of Selective Hunting On A Bear Population Through Pva Simulation." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12610026/index.pdf.

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Management of big wildlife such as bears can be a difficult task, especially in the face of human-wildlife conflict and demands of the hunting industry. The Brown Bear (Ursus arctos) population at Yusufeli County (Artvin, northeastern Turkey) has recently been the focus of scientific, social and economic concerns. This study population of c. 140 individuals occurs within 800 km2 of forested and alpine land. Legal hunting of male bears was allowed in 2007 after an interval of four years. This study aims to find out through a population viability analysis the level and frequency of trophy huntin

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22

Catlin, Daniel H. "Population Dynamics of Piping Plovers (Charadrius melodus) on the Missouri River." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/27442.

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Habitat loss and predation are threatening many shorebird populations worldwide. While habitat preservation often is preferable, sometimes habitat needs to be restored or created in order to stave off immediate declines. The Great Plains population of piping plovers (Charadrius melodus) was listed as threatened in 1986, and habitat loss and predation appear to be limiting the growth of this population. On the Missouri River, piping plovers nest on sandbars, but the damming of the mainstem of the Missouri in the mid-twentieth century reduced the natural capacity of the Missouri River to crea

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Catlin, Daniel Herbert. "Population Dynamics of Piping Plovers (Charadrius melodus) on the Missouri River." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/27442.

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Habitat loss and predation are threatening many shorebird populations worldwide. While habitat preservation often is preferable, sometimes habitat needs to be restored or created in order to stave off immediate declines. The Great Plains population of piping plovers (Charadrius melodus) was listed as threatened in 1986, and habitat loss and predation appear to be limiting the growth of this population. On the Missouri River, piping plovers nest on sandbars, but the damming of the mainstem of the Missouri in the mid-twentieth century reduced the natural capacity of the Missouri River to crea

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24

Secchi, Eduardo Resende, and n/a. "Modelling the population dynamics and viability analysis of franciscana (Pontoporia blainvillei) and Hector�s dolphins (Cephalorhynchus hectori) under the effects of bycatch in fisheries, parameter uncertainty and stochasticity." University of Otago. Department of Zoology, 2006. http://adt.otago.ac.nz./public/adt-NZDU20070118.162020.

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Incidental mortality in fisheries, especially gillnets, is one of the most important causes of decline of many species of cetaceans around the globe. Local populations of franciscana, Pontoporia blainvillei, and Hector�s dolphins, Cephalorhynchus hectori, have been subject to high levels of mortality in gillnets for several decades. This is due to a combination of extensive overlap in distribution of these coastal dolphins and large numbers of fishing nets. Stage-specific population dynamic models (without environmental stochasticity) suggest that both species have a low potential for popula

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25

Ozut, Deniz. "Evaluation Of The Adaptation Process Of A Reintroduced Anatolian Mouflon (ovis Gmelinii Anatolica) Population Through Studying Its Demography And Spatial Ecology." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/3/12611746/index.pdf.

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In this thesis the demography, home range and habitat selection of a reintroduced population of Anatolian mouflon (Ovis gmelinii anatolica), which had a single remaining population, was studied to evaluate the reintroduction success and determine the conservation management interventions. For this purpose among 104 individuals reintroduced in Sariyar Wildlife Protection Area (Ankara, Turkey), 40 adults were radio-collared and 28 juvenile were ear-tagged and monitored from 2005 to 2009. The survival of the population according to the age groups (females, 0: 0.5423, 1: 0.60, 2: 0.5316, 3: 0.6637

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26

Whitehead, Amy Louise. "Tools for managing threatened species: improving the effectiveness of whio conservation." Thesis, University of Canterbury. School of Biological Sciences, 2009. http://hdl.handle.net/10092/3230.

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Conservation frequently requires immediate responses to prevent further declines of imperilled populations, often in the absence of detailed information. Consequently, population distribution patterns are often used to guide conservation decisions. However, distribution patterns may be misleading if threats have restricted species to low quality habitat. This issue means it is not always apparent where management efforts should be concentrated for maximum conservation gain. My aim was to improve the effectiveness of threatened species conservation by investigating this issue in whio (blue duck

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27

Luna, Soledad. "Population Dynamics And Factors Affecting Spiny Lobster Small Scale Fisheries." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-234815.

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This dissertation analyses the effects of current fisheries practices and management regulations of the green spiny lobster (Panulirus gracilis) in the Eastern Tropical Pacific Region (ETP). P. gracilis has reached a critical state in the ETP. Country-based studies report that between 60 and 98% of lobsters caught in the wild are under the minimum landing size (MLS). This means that spiny lobsters are being extracted before reproducing and contributing to the replenishment of interconnected populations. The recovery of green spiny lobster populations in the ETP and the future maintenance of a

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Rosenblatt, Connor James. "Integrated Population Modeling of Northern Bobwhite and Co-occupancy with Open-land-Dependent Birds in Southern Ohio." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1588245826169158.

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29

Veiga, Joana Beschorner da. "TAMANHO E DENSIDADE DAS POPULAÇÕES DE Alouatta guariba clamitans CABRERA, 1940 (PRIMATES, ATELIDAE) NO CAMPO DE INSTRUÇÃO DE SANTA MARIA E ÁREAS VIZINHAS." Universidade Federal de Santa Maria, 2013. http://repositorio.ufsm.br/handle/1/5309.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>This dissertation evaluated the age-sex structure, group size and population density of Alouatta guariba clamitans in 40 forest fragments. We also present a Population Viability Analysis for the subspecies. The study was conducted at Campo de Instrução de Santa Maria (CISM), an area of 5,876 ha belonging to the Ministry of Defense (Brazilian Army) and surrounding areas, located in the municipality of Santa Maria (Rio Grande do Sul State, South Brazil). The fieldwork was conducted from March 2012 to February 2013, totaling 58 days a

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30

Rautiainen, P. (Pirjo). "Population biology of the Primula sibirica group species inhabiting frequently disturbed seashore meadows: implications for management." Doctoral thesis, University of Oulu, 2006. http://urn.fi/urn:isbn:9514280253.

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Abstract Many plant species inhabiting the seashore meadows of the Bothnian Bay, especially early successional ones, have become threatened. Isostatic land uplift creates virgin land for early successional species to colonise. However, at the same time it gradually elevates the habitat and eventually makes the habitat unsuitable for them. Disturbances of the waterfront may slow down succession and create new empty sites. In order to persist on the shores, pioneer species have to be able to colonise new sites by seeds, vegetative propagules or growth. In this thesis I studied the status of an

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31

Kuningas, Sanna. "Population dynamics and distribution of northern Norwegian killer whales in relation to wintering herring." Thesis, University of St Andrews, 2014. http://hdl.handle.net/10023/4878.

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The northern Norwegian killer whale (Orcinus orca) is an important predator but little is known about its population dynamics, particular in response to changes in its main prey, the highly dynamic Norwegian spring spawning (NSS) herring (Clupea harengus). The main aims of this thesis were to estimate killer whale population parameters, to explore the future viability of the population, and to explore the response of this predator to changes in distribution and abundance of its main prey over the last 25 years. Population size was estimated as ~ 700 individuals, taking heterogeneity of capture

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32

Roxburgh, David James. "Prey and range use of lions on Tswalu Kalahari Reserve." Diss., Pretoria : [s.n.], 2009. http://upetd.up.ac/thesis/available/etd-12132009-154240.

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33

Almeida, Inaê Guion de. "Viabilidade Populacional de Sotalia guianensis (van BÉNÉDEN, 1864) (Cetacea, Delphinidae) no Complexo Estuarino-Lagunar de Cananéia, Estado de São Paulo." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/91/91131/tde-04122014-085521/.

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Sotalia guianensis é um pequeno cetáceo costeiro encontrado ao longo do Oceano Atlântico Sul-Ocidental. Está exposta a inúmeras ameaças, tais como captura acidental em redes de pesca, tráfego de embarcações e turismo. A análise de viabilidade populacional (AVP) é uma forma de prever as flutuações e a probabilidade de persistência ou extinção de uma espécie ou população ao longo do tempo, incorporando dados demográficos, ecológicos e ambientais de populações reais em simulações computacionais de modelos estocásticos e determinísticos. O presente estudo teve como objetivos estimar densidade, abu

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34

Sato, Yu. "Genetic research into Japanese golden eagle (Aquila chrysaetos japonica) for conservation managements." Kyoto University, 2019. http://hdl.handle.net/2433/242652.

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35

Hawkins, Emily. "Demography, Movement Patterns, and Habitat Selection of Blanding's Turtles at Canadian Nuclear Laboratories in Chalk River, Ontario." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/35563.

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The development and implementation of effective species and population-specific management strategies requires population-specific information. To demonstrate the relative extirpation risk associated with various road mortality scenarios for a population of Blanding’s turtles at Canadian Nuclear Laboratories in Chalk River, Ontario, a Population Viability Analysis was conducted. Road mortality of two adult females every ten years resulted in population extirpation within 200 years relative to a stable population not experiencing road mortality. To accommodate informed decision-making for the m

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36

Berglind, Sven-Åke. "Population Dynamics and Conservation of the Sand Lizard (Lacerta agilis) on the Edge of its Range." Doctoral thesis, Uppsala universitet, Evolutionär funktionsgenomik, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-5750.

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The sand lizard (Lacerta agilis) reaches the northern periphery of its distribution in south-central Sweden, where small, isolated relict populations occur in pine heath forests on sandy sediments. Modern forestry and fire suppression have reduced the amount of suitable open habitat for the species in this area and seem to be important for its decline. Main objectives of this thesis were to evaluate the efficiency of different management strategies, and if the sand lizard can function as an umbrella species for biodiversity conservation. Over a 16-year period, the estimated annual numbers of a

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37

Inoue, Kentaro. "A Comprehensive Approach to Conservation Biology: From Population Genetics to Extinction Risk Assessment for Two Species of Freshwater Mussels." Miami University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=miami1437683696.

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Ok, Meltem. "Past, Present Status And Future Of The Mediterranean Monk Seal (monachus Monachus, Hermann 1779) In The Northeastern Mediterranean." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/3/12608085/index.pdf.

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Status and distribution of the Mediterranean monk seal in the northeastern Mediterranean were studied between October 2003 and December 2005. In total, 7 research cruises and 8 research visits were carried out to the region in the study period. The study was generally focused on two regions. First region was mainly around the Cilicia basin in the northeastern Mediterranean where a known Mediterranean monk seal colony (the Cilician colony) inhabits. Second region was around the Gulf of iskenderun where the population status of the monk seals was unknown.In the northeastern Mediterranean, all mo

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McDonald, Amy Elizabeth. "Improving the success of a translocation of black mudfish (Neochanna diversus)." The University of Waikato, 2007. http://hdl.handle.net/10289/2345.

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All of New Zealand's five endemic species of mudfish (Neochanna) are threatened, and translocation has been recommended as an option for conservation. This research undertakes a translocation of black mudfish (Neochanna diversus) into wetland margins of Lake Kaituna, in the Waikato region, and addresses research questions applicable to improving translocation success. Results from this research are intended to aid possible future translocations of the more threatened Northland mudfish (Neochanna heleios) and other genetically distinct populations of black mudfish. Captive rearing of juvenil

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McKenzie, Jane, and janemckenzie@malpage com. "Population demographics of New Zealand fur seals (Arctocephalus forsteri)." La Trobe University. Zoology Department, School of Life Sciences, 2006. http://www.lib.latrobe.edu.au./thesis/public/adt-LTU20080509.121141.

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Assessment of trophic interactions between increasing populations of New Zealand fur seals (Arctocephalus forsteri) and fisheries in southern Australia is limited due to a lack of species specific demographic data and an understanding of the factors influencing population growth. To establish species specific demographic parameters a cross-sectional sample of New Zealand fur seal females (330) and males (100) were caught and individually-marked on Kangaroo Island, South Australia between 2000 and 2003. The seals were aged through examination of a postcanine tooth, which was removed from each a

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Fearon, Joclyn Joe. "Population assessments of priority plant species used by local communities in and around three Wild Coast reserves, Eastern Cape, South Africa." Thesis, Rhodes University, 2011. http://hdl.handle.net/10962/d1007059.

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The project was initiated by Eastern Cape Parks (ECP) as a request for the construction of inventories of priority species and their population levels inside three nature reserves on the Eastern Cape Wild Coast, South Africa, and to develop a strategic management plan to manage these natural resources in each reserve. Thirty key species were identified by local communities in and around Dwesa-Cwebe, Silaka and Mkambati Nature Reserves through community workshops. For forested areas belt transects of 100 m x 6 m where used. The basal circumference of key tree species within the belt transect wa

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Page, Samantha Karin. "The feasibility of reintroducing African wild dogs (Lycaon pictus) into the Great Fish River Nature Reserve, Eastern Cape, South Africa." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1016078.

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With a declining population of roughly 3000-5000 individuals in Africa, African wild dogs (Lycaon pictus) are one of the most endangered carnivores in the world. As the global human population expands, it is becoming increasingly unlikely that large portions of land will be set aside for conservation, especially in developing countries. Thus, recent wild dog conservation efforts in South Africa have concentrated on establishing a managed metapopulation. A metapopulation is a group of geographically isolated subpopulations of a species that are managed (using supplementation and harvesting) to

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Šťastná, Andrea. "Analýza životaschopnosti ohrožených druhů zvířat v České republice." Master's thesis, Vysoká škola ekonomická v Praze, 2017. http://www.nusl.cz/ntk/nusl-359250.

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Diploma thesis analyzes the viability of the selected species populations in the Czech Republic. The thesis is divided into two main parts. The first part contains a stochastic model simulating possible scenarios of the Eurasian lynx population size in the Czech Republic. For this model program Vortex was used. The second part is focused on Time series analysis of the Grey Partridge and the Common Kingfisher population, where data was obtained from the Czech Society for Ornithology. This analysis aims on identification of factors that may affect the viability of the two bird species.

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McClung, Andrew. "A population viability analysis of the Laysan finch (Telespiza cantans)." Thesis, 2005. http://proquest.umi.com/pqdweb?index=0&did=982803201&SrchMode=2&sid=3&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1234291671&clientId=23440.

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Lin, Rong-An, and 林容安. "Population viability analysis of Formosan black bears (Ursus thibetanus formosanus)." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/50404971248105479839.

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碩士<br>國立屏東科技大學<br>野生動物保育研究所<br>101<br>Abstract Student ID：M9817010 Title of Thesis：Population viability analysis of Formosan black bears (Ursus thibetanus formosanus) Total Page：153 Name of Institute：Institute of Wildlife Conservation, National Pingtung University of Science and Technology Graduate Date：January 2013 Degree Conferred：Master Name of Student：Rong-An Lin Adviser：Dr. Mei-Hsiu Hwang The Contents of Abstract in This Thesis： Extinction is an important issue in conservation. Species survival is threatened by human, as well as catastrophes, demographic, environme

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"Is the southwest willow flycatcher at risk of quasi-extinction? A critical evaluation of recovery units for a conservation icon." Master's thesis, 2012. http://hdl.handle.net/2286/R.I.14849.

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abstract: The southwestern willow flycatcher (Empidonax traillii extimus) is listed as an endangered species throughout its range in the southwestern United States. Little is known about its sub-population spatial structure and how this impacts its population viability. In conjunction with being listed as endangered, a recovery plan was produced by the US Fish and Wildlife Service, with recovery units (sub-populations) roughly based on major river drainages. In the interest of examining this configuration of sub-populations and their impact on the measured population viability, I applied a mul

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"Developing Behavioral Indices of Population Viability: A Case Study of California Sea Lions in the Gulf of California, Mexico." Master's thesis, 2012. http://hdl.handle.net/2286/R.I.15085.

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abstract: Despite years of effort, the field of conservation biology still struggles to incorporate theories of animal behavior. I introduce in Chapter I the issues surrounding the disconnect between behavioral ecology and conservation biology, and propose the use of behavioral knowledge in population viability analysis. In Chapter II, I develop a framework that uses three strategies for incorporating behavior into demographic models, outline the costs of each strategy through decision analysis, and build on previous work in behavioral ecology and demography. First, relevant behavioral mechani

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Finch, Mary. "Life history and population dynamics of Eastern Sand Darter (Ammocrypta pellucida) in the lower Thames River, Ontario." Thesis, 2009. http://hdl.handle.net/10012/4475.

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Eastern Sand Darter (Ammocrypta pellucida) is listed as Threatened under the Canadian Species at Risk Act. Canadian populations are declining primarily due to the siltation of sandy depositional areas, the preferred habitat of the species. Little other relevant biological information is available for most Canadian populations and only limited information is available for populations in the United States. To supplement the paucity of information, this study collected biological information on A. pellucida during field surveys in 2006- 2007 from 10 sites located around the Big Bend Conservatio

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Pfingsten, Ian A. "Using local climate to explain temporal variation in rare plant populations." Thesis, 2012. http://hdl.handle.net/1957/33837.

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Increased temperatures due to anthropogenic-induced climate change may raise the threat of extinction for taxa with sessile life histories (e.g., plants) in the near future. Linking climate change models to demographic models may provide useful insights into the potential effects of environmental changes on rare plants, and therefore aid in their current and future conservation. Population demographers generally agree that mechanistic models from a reductionist perspective are necessary to test assumptions in population drivers. For the first study, I assessed the climate vulnerability of a ra

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Nicholson, Jeremy Michael. "Population and genetic impacts of a 4-lane highway on black bears in eastern North Carolina." 2009. http://trace.tennessee.edu/utk_gradthes/55.

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