Acceder

Bibliografías temáticas / Rare and protected species / Tesis

Siga este enlace para ver otros tipos de publicaciones sobre el tema: Rare and protected species.

Tesis sobre el tema "Rare and protected species"

Autor: Grafiati

Publicado: 7 de junio de 2025

Última modificación: 2 de agosto de 2025

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros

Elija tipo de fuente:

Consulte los 50 mejores tesis para su investigación sobre el tema "Rare and protected species".

Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.

También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.

Explore tesis sobre una amplia variedad de disciplinas y organice su bibliografía correctamente.

1

Kaimuddin, Awaluddin Halirin. "Impact du changement climatique sur la distribution des populations de poissons. Approche par SIG, modèles et scénarios d'évolution du climat." Thesis, Brest, 2016. http://www.theses.fr/2016BRES0039/document.

Texto completo

Resumen

La compréhension des interactions liant la répartition des espèces, la biodiversité, les habitats marins et le changement climatique est nécessaire voire fondamentale pour la mise en oeuvre d’une gestion efficace de la conservation, par exemple la mise en place d’aires marines protégées. Dans cette étude, nous avons travaillé sur l’évolution de richesse de 89 espèces de poissons notées «rares» ou «exotiques» (observées en dehors de leur aire de répartition connue) lié au changement climatique. Nous avons modélisé et prédit leur distribution saisonnière par le modèle SIG en fonction de leurs ni

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

Price, Tom. "The ecology of rare species." Thesis, University of Leeds, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405795.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

Wilkinson, Timothy John. "Cryopreservation of rare and endangered species." Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312121.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

Holenstein, Kathrin. "Permeability of European Protected Areas to Non-Native Species." Thesis, Université de Montpellier (2022-….), 2022. http://www.theses.fr/2022UMONG015.

Texto completo

Resumen

Les aires protégées sont des éléments clés de la stratégie mondiale de conservation de la biodiversité, en visant à préserver les espèces, les habitats et les écosystèmes. La mondialisation a entraîné une augmentation des introductions d'espèces en dehors de leur aire de répartition naturelle. Dans leur nouvel environnement, certaines de ces espèces non indigènes ont le potentiel d’affecter les écosystèmes, de concurrencer ou de menacer les espèces locales. L'environnement à proximité des aires protégées est susceptible de servir de tremplin à ces espèces introduites avant qu’elles ne pénètren

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

Quinn, Rachel. "The biogeography of rare species and their conservation." Thesis, Imperial College London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311471.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

Magnussen, Jennifer E. "DNA Diagnostics for Internationally Protected and Commercially Traded Shark Species." NSUWorks, 2006. http://nsuworks.nova.edu/occ_stuetd/271.

Texto completo

Resumen

Industrial scale exploitation of sharks globally to satisfy demands of the international shark fin market have resulted in trade in a few species considered particularly sensitive being restricted or controlled by national legislation or international accord (e.g. CITES). Despite these conservation efforts, trade in these species continues because law enforcement monitoring and surveillance is hindered by substantial difficulties with identifying species of origin of detached shark body parts. Additionally, attempts to assess the impacts of the fin trade on global shark populations generally h

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

Hiley, Jonathan Richard. "The importance of protected areas for species undergoing distribution changes." Thesis, University of York, 2017. http://etheses.whiterose.ac.uk/18782/.

Texto completo

Resumen

The value of Protected Areas for wildlife will diminish if the species for which they were originally designated are pushed out of their boundaries by changing temperatures, or if they are infiltrated by invasive species that are harmful to native species. Here, I assess the performance of Protected Areas against this background of distributional change. I found that Protected Areas have facilitated the range expansions of the six wetland bird species that have recently colonised the UK, both as sites at which breeding first occurs and as locations where substantial populations can establish b

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

So, Rachel I. "Does Additional Habitat Protection Facilitate the Recovery of Species Protected by the Endangered Species Act?" Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/30910.

Texto completo

Resumen

Earlier studies have found that endangered species recovery is only weakly associated with the tools enabled by the U.S. Endangered Species Act (ESA). With habitat loss often cited as a leading cause of species declines, we tested whether the recovery of ESA-listed species is instead associated with the protection of critical habitat (CH) by protected areas. We tested the relationship for 299 species using recovery indices derived from the biennial status reports to Congress (1990-2010), as well as NatureServe and IUCN population status data. We found no overall relationship between recover

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

Llorens, Tanya M. "Conservation genetics and ecology of two rare grevillea species." Department of Biological Sciences - Faculty of Science, 2004. http://ro.uow.edu.au/theses/374.

Texto completo

Resumen

Small and isolated plant populations have a higher probability of extinction – they are more susceptible to a range of environmental, demographic and genetic processes that may reduce population viability. In recent times, the number of populations and species that are susceptible to these processes has increased as a result of world-wide, human-induced habitat fragmentation. Habitat fragmentation typically reduces the formerly more continuous natural distribution of a species to a series of smaller and more isolated populations that occur in smaller and more isolated habitat patches. Such pop

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Hirst, G. "Ionic species in gas lasers." Thesis, University of Oxford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379854.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

11

Virgili, Auriane. "Modelling distributions of rare marine species : the deep-diving cetaceans." Thesis, La Rochelle, 2018. http://www.theses.fr/2018LAROS003/document.

Texto completo

Resumen

Les cétacés grands plongeurs, cachalots Physeteridae et Kogiidae, et baleines à bec Zipiidae, sont des espèces marines rares. Leur faible densité, aire de distribution étendue et faible disponibilité en surface génèrent de faibles taux d’observations. Cette particularité constitue un défi pour la modélisation d’habitat de ces espèces, préalable à leur conservation. Les modèles doivent gérer l’abondance de zéros qui limitent leur capacité à inférer des résultats écologiquement cohérents. Cette thèse vise donc à trouver une méthodologie adaptée aux jeux de données abondants en zéros, à détermine

Los estilos APA, Harvard, Vancouver, ISO, etc.

12

Barrett, Gregory J. "The reproductive biology and conservation of two rare Banksia species." Thesis, Curtin University, 1985. http://hdl.handle.net/20.500.11937/2356.

Texto completo

Resumen

Two rare Banksia species, B. chamaephyton A.S. George and B. elegans Meissner, were the subject of this study. B. chamaephyton is gazetted as rare under the Wildlife Conservation Act of Western Australia and B. elegans has been recorded by various authors as restricted in range and habitat.Data were collected on the distribution, habitat, reproduction and fire responses of each species. Both were found to occur predominantly in the Irwin Botanical District. B. chamaephyton is found in low heath on sand over laterite and B. elegans in scrub or thickets on deep, yellow sands. Data on species co-

Los estilos APA, Harvard, Vancouver, ISO, etc.

13

Barrett, Gregory J. "The reproductive biology and conservation of two rare Banksia species." Curtin University of Technology, School of Biology, 1985. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=11674.

Texto completo

Resumen

Two rare Banksia species, B. chamaephyton A.S. George and B. elegans Meissner, were the subject of this study. B. chamaephyton is gazetted as rare under the Wildlife Conservation Act of Western Australia and B. elegans has been recorded by various authors as restricted in range and habitat.Data were collected on the distribution, habitat, reproduction and fire responses of each species. Both were found to occur predominantly in the Irwin Botanical District. B. chamaephyton is found in low heath on sand over laterite and B. elegans in scrub or thickets on deep, yellow sands. Data on species co-

Los estilos APA, Harvard, Vancouver, ISO, etc.

14

Rossington, Natalie L. "How are rare species maintained?: Reproductive barriers between Layia jonesii, a rare serpentine endemic, and L. platyglossa." DigitalCommons@CalPoly, 2015. https://digitalcommons.calpoly.edu/theses/1494.

Texto completo

Resumen

Reproductive barriers are vital to generating new species as well as maintaining distinct species. Investigating reproductive barriers between closely related plant taxa helps us to understand how these barriers are maintained, particularly between rare and widespread relatives. Layia jonesii, a rare San Luis Obispo County serpentine endemic, and L. platyglossa, a common coastal species, co-occur on serpentine derived hillsides and are interfertile. At these locations, L. jonesii is isolated to dry soils near serpentine rock outcrops and L. platyglossa is located on slightly deeper grassland s

Los estilos APA, Harvard, Vancouver, ISO, etc.

15

Curnick, D. J. "The role of marine protected areas in conserving highly mobile pelagic species." Thesis, University College London (University of London), 2016. http://discovery.ucl.ac.uk/1495973/.

Texto completo

Resumen

In this thesis I assess the efficacy of large no-take marine protected areas (MPAs), known as marine reserves, in safeguarding mobile pelagic predators. The creation of reserves excludes fisheries, so while removing a pressure, it also removes a key source of data on pelagic predators. Therefore, I also evaluate two fisheries-independent monitoring techniques: telemetry and camera trapping. I use the British Indian Ocean Territory (BIOT) marine reserve as a case study. In Chapter 2 I assess trends in tuna populations, showing that yellowfin tuna (Thunnus albacares) were declining in BIOT prior

Los estilos APA, Harvard, Vancouver, ISO, etc.

16

au, b. Ward@murdoch edu, and Beverley Lorraine Ward. "The Female Professor: a Rare Australian Species: The Who and How." Murdoch University, 2003. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20040621.121950.

Texto completo

Resumen

Although many studies have been made of female academic staff in Australia, there has been no discrete study of Australian female professors as an occupational class or of the relatively rare incumbents of this important position. This thesis makes a contribution to this previously unexplored area by providing a descriptive profile of current professors at Australian universities and an insight into female professors perspectives on how they managed their entry into the Australian professoriate. It responds to the twin central questions: Who are the female occupants in the Australian profess

Los estilos APA, Harvard, Vancouver, ISO, etc.

17

Ellis, Jonathan Shaw. "Population genetics and ecology of rare bumblebee species in the UK." Thesis, University of Southampton, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427427.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

18

Wilson, Philip John. "The ecology and conservation of rare arable weed species and communities." Thesis, University of Southampton, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303384.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

19

Gordovskaya, Irina. "Role of rare earth species on performance of coated aluminium alloys." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/role-of-rare-earth-species-on-performance-of-coated-aluminium-alloys(48f66b0a-d388-40c4-9405-48edfafcef83).html.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

20

Dalton, Naomi Jane. "Pollinators, plants and people : a transdisciplinary study of rare species conservation." Thesis, University of Bristol, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.688353.

Texto completo

Resumen

Translocation is widely used to counter the fragmentation and decline of populations of species at risk, in order to enhance their survival prospects. Additionally, translocation is used in ecological restoration to introduce taxa conferring strong positive influence, with the potential to recreate communities and reinstate functional roles. Conservation of species by translocation is considered high risk and high cost; therefore ecologists need to understand how success can be maximised. In this thesis, I test the community level impacts of a rare plant and evaluate the effectiveness of singl

Los estilos APA, Harvard, Vancouver, ISO, etc.

21

Ward, Beverley Lorraine. "The female professor: a rare Australian species, the who and how." Thesis, Ward, Beverley Lorraine (2003) The female professor: a rare Australian species, the who and how. PhD thesis, Murdoch University, 2003. https://researchrepository.murdoch.edu.au/id/eprint/387/.

Texto completo

Resumen

Although many studies have been made of female academic staff in Australia, there has been no discrete study of Australian female professors as an occupational class or of the relatively rare incumbents of this important position. This thesis makes a contribution to this previously unexplored area by providing a descriptive profile of current professors at Australian universities and an insight into female professors' perspectives on how they managed their entry into the Australian professoriate. It responds to the twin central questions: 'Who are the female occupants in the Australian profess

Los estilos APA, Harvard, Vancouver, ISO, etc.

22

Ward, Beverley Lorraine. "The female professor : a rare Australian species, the who and how /." Ward, Beverley Lorraine (2003) The female professor: a rare Australian species, the who and how. PhD thesis, Murdoch University, 2003. http://researchrepository.murdoch.edu.au/387/.

Texto completo

Resumen

Although many studies have been made of female academic staff in Australia, there has been no discrete study of Australian female professors as an occupational class or of the relatively rare incumbents of this important position. This thesis makes a contribution to this previously unexplored area by providing a descriptive profile of current professors at Australian universities and an insight into female professors' perspectives on how they managed their entry into the Australian professoriate. It responds to the twin central questions: 'Who are the female occupants in the Australian profess

Los estilos APA, Harvard, Vancouver, ISO, etc.

23

Smith, Russell Stephen. "The ecology of two rare Chamelaucium species (Myrtaceae) from Southwestern Australia." Thesis, Smith, Russell Stephen (1994) The ecology of two rare Chamelaucium species (Myrtaceae) from Southwestern Australia. Masters by Research thesis, Murdoch University, 1994. https://researchrepository.murdoch.edu.au/id/eprint/51903/.

Texto completo

Resumen

Studies were carried out into various aspects of the ecology of Chamelaucium erythrochlorum m.s. and C. roycei m.s. (Myrtaceae), two declared rare and endangered shrubs restricted to the south west of Western Australia. Initially a soil and vegetation survey was a carried out at the site of all known populations of C erythrochlorum and C. roycei and at some nearby environmentally similar areas where the species did not occur. In addition, aspects of the water relations, phenology and reproductive biology of both species was investigated. Measurements of various floral characters and leaf lengt

Los estilos APA, Harvard, Vancouver, ISO, etc.

24

O'Leary, Rebecca A. "Informed statistical modelling of habitat suitability for rare and threatened species." Thesis, Queensland University of Technology, 2008. https://eprints.qut.edu.au/17779/1/Rebecca_O%27Leary_Thesis.pdf.

Texto completo

Resumen

In this thesis a number of statistical methods have been developed and applied to habitat suitability modelling for rare and threatened species. Data available on these species are typically limited. Therefore, developing these models from these data can be problematic and may produce prediction biases. To address these problems there are three aims of this thesis. The _rst aim is to develop and implement frequentist and Bayesian statistical modelling approaches for these types of data. The second aim is develop and implement expert elicitation methods. The third aim is to apply these novel ap

Los estilos APA, Harvard, Vancouver, ISO, etc.

25

O'Leary, Rebecca A. "Informed statistical modelling of habitat suitability for rare and threatened species." Queensland University of Technology, 2008. http://eprints.qut.edu.au/17779/.

Texto completo

Resumen

In this thesis a number of statistical methods have been developed and applied to habitat suitability modelling for rare and threatened species. Data available on these species are typically limited. Therefore, developing these models from these data can be problematic and may produce prediction biases. To address these problems there are three aims of this thesis. The _rst aim is to develop and implement frequentist and Bayesian statistical modelling approaches for these types of data. The second aim is develop and implement expert elicitation methods. The third aim is to apply these novel ap

Los estilos APA, Harvard, Vancouver, ISO, etc.

26

Yenni, Glenda Marie. "Self-limitation as an explanation for species' relative abundances and the long-term persistence of rare species." DigitalCommons@USU, 2013. https://digitalcommons.usu.edu/etd/1958.

Texto completo

Resumen

Much of ecological theory describes species interactions. These interactions often play an important theoretical role in facilitating coexistence. In particular, rarity in ecological communities, though often observed, provides a significant challenge to theoretical and empirical ecologists alike. I use a plant community model to simulate the effect of stronger negative frequency dependence on the long-term persistence of the rare species in a simulated community. This strong self-limitation produces long persistence times for the rare competitor, which otherwise succumb quickly to stochastic

Los estilos APA, Harvard, Vancouver, ISO, etc.

27

Ball, Jonathan Bradford. "Approaches towards a critical evaluation and update of the red list of South African butterflies /." Link to the online version, 2006. http://hdl.handle.net/10019/196.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

28

Lewendon, Sarah. "Self-incompatibility in Cosmos atrosanauineus : a rare Mexican endemic species of Asteraceae." Thesis, University of Greenwich, 2005. http://gala.gre.ac.uk/6225/.

Texto completo

Resumen

This work centres on Cosmos atrosanguineus, a rare Mexican endemic self-incompatible species of Asteraceae that is now believed to be extinct in the wild. The two known wild C. atrosanguineus collections, made in made in the 19th century, localise the species to the pine-oak mountain forest ecological region in two areas of central Mexico. Its disappearance from the natural environment is attributed to habitat destruction by the copper mining industry and subsequent urbanisation, so that C. atrosanguineus is now known only as a cultivated species. European and American C. atrosanguineus popula

Los estilos APA, Harvard, Vancouver, ISO, etc.

29

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.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

30

Rebelo, Hugo Emanuel Vitorino. "Using species distribution modelling and genetic analysis for the conservation of rare species : case studies on European bats." Thesis, University of Bristol, 2009. http://hdl.handle.net/1983/8498c4b1-266c-4afa-bc41-9c84749ba4c1.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

31

Klorvuttimontara, Sravut. "Modelling the effectiveness of protected areas for conserving tropical species under future climate warming." Thesis, University of York, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.535047.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

32

SANTO, ANDREA. "Seed germination requirements and salt stress tolerance of coastal rare species in Sardinia." Doctoral thesis, Università degli Studi di Cagliari, 2013. http://hdl.handle.net/11584/266220.

Texto completo

Resumen

To survive to adverse factors that characterize coastal environments, plant species often require special physiological or metabolic adaptations to overcome environmental stresses. Stress may be physical (e.g. temperature) or chemical (e.g. salinity). Many communities comprise highly specialized species, which have comparatively restricted geographical distributions. The coastal species investigated in this Ph.D. program were chosen accordingly to their habitat: Phleum sardoum (Hackel) Hackel and Rouya polygama (Desf.) Coincy for sandy dunes; Brassica insularis Moris and Lavatera triloba L. s

Los estilos APA, Harvard, Vancouver, ISO, etc.

33

Wheeler, Belinda Ruth. "Aspects of the ecology and conservation of the rare plant species Phyteuma spicatum L (Campanulaceae) in the British Isles." Thesis, University of Sussex, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363382.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

34

Beazley, Karen. "A focal-species approach to biodiversity management in Nova Scotia." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0026/NQ36569.pdf.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

35

Antezza, Arianna. "Genetic structure among populations of two gorgonian species inside and outside a Mediterranean Marine Protected Area." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

Buscar texto completo

Resumen

Marine Protected Areas (MPAs) are spatially delimited areas of the marine environment that are managed to conserve its biodiversity. Genetic connectivity and variability are two important parameters to take in account for proper design and manage MPAs. Gorgonians have an important ecological role contributing to provide biomass and complexity to the benthic habitats. Here, I evaluate the potential role of the MPA of Tavolara-Punta Coda Cavallo, Sardinia, in maintaining genetic diversity and connectivity among populations of two Mediterranean gorgonians: Eunicella singularis and Eunicella cavo

Los estilos APA, Harvard, Vancouver, ISO, etc.

36

Coetzee, Bernard Walter Thomas. "Species assembly patterns and protected area effectiveness in times of change : a focus on African avifauna." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/79804.

Texto completo

Resumen

Thesis (PhD)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: The challenge of conserving biodiversity is daunting. Despite some local conservation gains, most indicators of the condition of global biodiversity show declines since the 1970’s, while indicators of the threats to biodiversity all show increases. Humanity has in part responded to the global biodiversity extinction crisis by establishing protected areas (PA) and they are widely considered cornerstones of conservation. However, their efficacy in maintaining biodiversity is much debated. Previous studies have been unable to

Los estilos APA, Harvard, Vancouver, ISO, etc.

37

Holmström, Linn. "Can the environment and bird species have priority over economic interests? : A study of the protection of protected areas, bird species and their habitats." Thesis, Linnéuniversitetet, Ekonomihögskolan, ELNU, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-21288.

Texto completo

Resumen

Human enlargement and improvements are following the same scheme as the world economies, and have through the same structure damaged and overexploited the ecological systems of the Earth, leading to a progressive degradation of its biodiversity. The need for protected areas is now inescapable when it comes to restoring species while sustainable development and prevention of damaging the environment have become prominent. It is now even more important that the awareness of an actual impact of our living standards on the ecological system has been established. International and more specifically

Los estilos APA, Harvard, Vancouver, ISO, etc.

38

Ma, Kevin Cam Kau, and Kevin Cam Kau Ma. "Rare species detection and benthic recruitment across multiple scales of space and time with implications for early detection of marine invasive species." Doctoral thesis, Université Laval, 2020. http://hdl.handle.net/20.500.11794/38152.

Texto completo

Resumen

Les activités anthropiques causent des invasions biologiques qui sont devenues un problème mondial susceptible de causer des dommages écologiques (p. ex., sur la biodiversité et l’habitat), économiques (sur les industries) et sociaux (sur le bien-être humain). La prévention et la détection précoce des nouvelles invasions sont des éléments essentiels pour la gestion des risques et des impacts sur les écosystèmes et les économies. Bien sûr, la prévention est préférable, mais la détection précoce est une étape cruciale pour enrayer la propagation ultérieure des espèces envahissantes, car elle off

Los estilos APA, Harvard, Vancouver, ISO, etc.

39

Armstrong, Paul Gerrard. "Population dynamics with life history modelling of rare and common Grevillea species in Western Australia." Thesis, Armstrong, Paul Gerrard (2002) Population dynamics with life history modelling of rare and common Grevillea species in Western Australia. PhD thesis, Murdoch University, 2002. https://researchrepository.murdoch.edu.au/id/eprint/51913/.

Texto completo

Resumen

The management of rare plant species often involves the maintenance of small populations. This is a difficult task as management prescriptions are limited due to an inability to trial different options on the species where few individuals are involved. ln small populations there is no resilience to failure if an unsuccessful management decision is made. This thesis reports on an investigation of selected factors that may have or have had an impact on the ecology and biology of four Grevillea species from the northern sandplains kwongan of southwestern Western Australia over a nine year period.

Los estilos APA, Harvard, Vancouver, ISO, etc.

40

Mostert, Esther Anna. "Prioritising bird species of special concern for monitoring and conservation action in protected areas Esther Anna Mostert." Master's thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/10784.

Texto completo

Resumen

Includes abstract.<br>This thesis focused on developing an approach for prioritising Bird Species of Special Concern for conservation and monitoring action within the South African National Parks (SANParks). SANParks is in the process of developing a Species of Special Concern Monitoring Programme (SSC MP) which forms part of the larger SANParks Biodiversity Monitoring System. Birds are known to be good indicators of biodiversity for a number of reasons.

Los estilos APA, Harvard, Vancouver, ISO, etc.

41

Callaghan, Claire. "Evaluation of the effectiveness of the protected area network of yorkshire and the Humber : an examination of persistence and representation of species on a focal protected area network." Thesis, University of Leeds, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.509035.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

42

Viljoen, Morné. "A critical review of the South African freshwater angling legislative framework / Morné Viljoen." Thesis, North-West University, 2010. http://hdl.handle.net/10394/4235.

Texto completo

Resumen

Prior to 1993, freshwater angling in South Africa had been governed by the respective nature conservation legislation of the four South African provinces, the four “independent homelands" and the six so-called Bantustans. In 1993 a South Africa with nine provinces was created, of which only Limpopo and Mpumalanga promulgated its own laws governing freshwater angling. From 2008 angling for listed threatened and protected freshwater fish species has been regulated by the National Environmental Management: Biodiversity Act, supplemented by the Threatened or Protected Species Regulations. In addit

Los estilos APA, Harvard, Vancouver, ISO, etc.

43

Truelove, Nathan. "The conservation genetics of ecologically and commercially important coral reef species." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/the-conservation-genetics-of-ecologically-and-commercially-important-coralreef-species(8195a828-2305-430c-9997-548030e417ca).html.

Texto completo

Resumen

Identifying the extent to which coral reef species are connected by dispersal is a fundamental challenge for developing marine conservation strategies. Many coral reef species are relatively sedentary as adults, yet have a pelagic larval phase where larvae can potentially be widely dispersed by ocean currents. This thesis focuses on the role of ocean currents in driving spatially explicit patterns of population connectivity among ecologically and commercially important coral reef species by combining research tools from population genetics, oceanography, and biophysical modeling. Despite the s

Los estilos APA, Harvard, Vancouver, ISO, etc.

44

Kercher, Diana Marie. "Genetic Assessment of Rare Blackbanded Sunfish (Enneacanthus Chaetodon) Populations in Virginia." VCU Scholars Compass, 2006. http://scholarscompass.vcu.edu/etd/1359.

Texto completo

Resumen

Enneacanthus chaetodon, the blackbanded sunfish, has become increasingly rare throughout its distribution in the Eastern United States. In Virginia, E. chaetodon maintains an endangered status and individuals persist in six populations. Mitochondrial DNA (mtDNA) and microsatellite data were assessed to determine the genetic characters and gene diversity of the Virginia populations. The results of these analyses were then compared to five additional populations; four from New Jersey and one from North Carolina that were known to have relatively good fitness and were not impacted severely by hab

Los estilos APA, Harvard, Vancouver, ISO, etc.

45

Duckworth, Greg. "Effects of protected areas and climate change on the occupancy dynamics of common bird species in South Africa." Doctoral thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/29600.

Texto completo

Resumen

Protected areas are tracts of land set aside primarily for the conservation of biodiversity and natural habitats. They are intended to mitigate biodiversity loss caused by land-use change worldwide. Climate change has been shown to disrupt species' natural distributions and patterns, and poses a significant threat to global biodiversity. The goals of this thesis are to address these important issues, and understand how protected areas and climate change affect the range dynamics of common, resident bird species in South Africa. Common species were used because they have been shown to drive imp

Los estilos APA, Harvard, Vancouver, ISO, etc.

46

Rasmussen, David E. "COMPARISONS OF FISH SPECIES INSIDE AND OUTSIDE OF MARINE PROTECTED AREAS OFF THE SOUTH CENTRAL COAST OF CALIFORNIA." DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/404.

Texto completo

Resumen

COMPARISONS OF FISH SPECIES INSIDE AND OUTSIDE OF MARINE PROTECTED AREAS OFF THE SOUTH CENTRAL COAST OF CALIFORNIA David E. Rasmussen From 2004-2008 and 2008-2009 Cal Poly University researchers conducted two separate tag and recapture studies of nearshore fish populations along California’s central coast. Three locations were sampled that have experienced different degrees of fishing pressure. Big Creek MPA has been closed to all fishing from 1993 onwards and is the farthest from port of all locations. Cambria lies closest to port of the three locations and because of this has the highest fi

Los estilos APA, Harvard, Vancouver, ISO, etc.

47

Lin, Wuying. "Comparative Reproductive Biology of a Rare Endemic Orchid and its Sympatric Congeners in Southwestern China." FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/570.

Texto completo

Resumen

Comparative studies on endangered species and their more common congeners can shed light on the mechanism of species rarity, and enable conservationists to formulate effective management strategies. I compared the breeding and pollination systems of the endangered Geodorum eulophioides and its two more common sympatric congeners in subtropical China. Geodorum eulophioides and G. recurvum were self-compatible, both depending on Ceratina cognata for fruit production, while G. densiflorum can autonomously self. Although the floral visitation frequency of G. eulophioides was the highest among the

Los estilos APA, Harvard, Vancouver, ISO, etc.

48

Underwood, Jim. "Routine and rare genetic connections in corals off northwest Australia and the implications for conservation." University of Western Australia. School of Animal Biology, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0158.

Texto completo

Resumen

[Truncated abstract] The extent to which marine populations are connected by larval dispersal is crucial to their distribution, maintenance and diversity. Thus, for the effective conservation of threatened systems such as coral reefs, understanding patterns of connectivity is essential. However, the biophysical mechanisms that retain or disperse larvae within and among populations are poorly understood. Though the open ocean environment provides the opportunity for long-distance dispersal, if this potential is only rarely realised, recruits produced from afar are unlikely to contribute to the

Los estilos APA, Harvard, Vancouver, ISO, etc.

49

Brabazon, Holly Kathryn. "Delimiting Species and Varieties of Cycladenia humilis (Apocynaceae)." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5921.

Texto completo

Resumen

Taxonomic delimitation of rare species is vital for accurate assessments of diversity and for their conservation. Cycladenia humilis, the sole species of Cycladenia, is an enigmatic perennial widely dispersed across the western United States. Within this species there are three currently recognized varieties: C. humilis var. humilis in Northern California, C. humilis var. venusta in Southern California, and C. humilis var. jonesii in Utah and Northern Arizona. Some populations occur geographically in areas between the typical distribution of each variety and the presently accepted taxonomy ina

Los estilos APA, Harvard, Vancouver, ISO, etc.

50

Hudgens, Faith Victoria. "AN ASSESSMENT OF STREAM QUALITY IN RELATION TO POPULATION HEALTH OF PLANTAGO CORDATA." OpenSIUC, 2021. https://opensiuc.lib.siu.edu/theses/2887.

Texto completo

Resumen

Understanding the health of rare and at-risk plant species is crucial for the conservation of biodiversity. Rare and at-risk species are often specialists with very specific requirements for growth and reproductive success. Some parameters associated with growth and reproductive success of rare aquatic species may include biotic and abiotic factors such as herbivory, competition, water depth, pH, and other factors associated with habitat quality. In this thesis, the population health of the rare and at-risk aquatic species Plantago cordata in Southern Illinois streams is assessed in relatio

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ofrecemos descuentos en todos los planes premium para autores cuyas obras están incluidas en selecciones literarias temáticas. ¡Contáctenos para obtener un código promocional único!