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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

The genus Martes (Mustelidae) in North America: |b its distribution, variation, classification, phylogeny and relationship to old world forms

Hagmeier, Edwin Moyer January 1955 (has links)
Three subgenera of the genus Martes exist in the world today. The first, Martes, consists of the following species: M. M. foina, M. martes, M. melampus and M. zibellina; the second, Pekania, of only one, M. pennanti; and the third, Charronia, of one, M. flavigula, with sometimes a second, M. guatkinsi. Within the subgenus Martes, M. americana, M. martes, M. zibellina and possibly M. melampus are so closely related morphologically there appears good reason to believe that they all belong to one species. Two species occur in North America, namely M. americana and M. pennanti. Until recently M. americana was considered to consist two species, M. americana and M. caurina, and thirteen or so subspecies. The recent work of P. L. Wright indicates that while the two "species" are distinctive morphologically, they intergrade at the point where their ranges meet and must be considered a single species. Martes pennanti has been considered one species, consisting of three subspecies. The concept of the subspecies proves in many respects to be unsatisfactory. It lacks reality, it involves the arbitrary partitioning of continua, it possesses no lower limit, and it is determined deductively. This, together with the clinal nature of variation in marten and fisher leads to the conclusion that marten of the New World should be considered as represented by only two subspecies (M. a. americana and a. caurina), the fisher by one species, and no named subspecies. The distribution of marten and fisher corresponds closely to the distribution of the northern evergreen forests. The distribution is less precise in fisher than in marten. Fossils referable to the genus Martes are first recorded from the Miocene of both the Old and New Worlds. Twenty-eight fossil species are known (when synonyms are disposed of), of which five are still living, two of them in North America. It appears that modern martens and fishers arrived in the New World (or evolved there) late in the Pliocene or early in the Pleistocene. During the Pleistocene marten found habitable environments in the forest refugia of south eastern United States, the Rocky Mountains south of the ice sheet, the Coast and Cascade Mountains south of the ice sheet, and Alaska and Yukon. Fisher presumably occurred in all of these refugia except the Alaska-Yukon one. With post-glacial climatic amelioration they migrated to the regions of their present occurrence. / Science, Faculty of / Zoology, Department of / Graduate
2

Lietuvos kiaunių populiacijų kokybė / Quality of Lithuanian Martens populations

Šidlauskas, Giedrius 21 June 2013 (has links)
Atlikus Lietuvoje gyvenančių kiaunių gausos ir sumedžiojimo analizę nustatyta, kad pastarąjį dešimtmetį Lietuvoje kasmet vidutiniškai sumedžiojama apie 500 kiaunių. Tendencija didėjanti. Iki šiol nežinoma kiek kiaunių sumedžiojama pagal atskiras jų rūšis. Naudojant du skirtingus amžiaus nustatymo metodus, abiejų kiaunių rūšių (M. martes ir M. foina) pirmamečių individų nustatyta daugiau nei suaugusių. Pirmamečių miškinės kiaunės patelių buvo nustatyta 12,5 % daugiau nei pirmamečių patinų. Nustatyta, kad abiejų kiaunių rūšių patinai buvo stambesni už pateles, tačiau jų lytinis dimorfizmas nėra stipriai išreikštas. Abiejų kiaunių rūšių patinai statistiškai patikimai skyrėsi tik pagal kūno masės ir krūtinės apimties duomenis (p< 0,1). Ištyrus Lietuvos kiaunių užsikrėtimą trichinelioze, konstatuota, kad 8,3 proc. kiaunių nustatyta Trichinella sp., o 1 g raumenų vidutiniškai rasta 1 šio parazito lerva. / After the assessment of martens abundance and hunting analysis stated that in past ten years in Lithuania the hunted martens are 500. The hunting tendency and numbers are growing. At this moment is unknown number about hunting different species individually (M. martes & M. foina). In this population first year specimens was dominating against adults. First year Pine marten female in population was 12,5 % more than first year males. Both species martens males were larger than females, but the sexual dimorphism wasn’t strong . Both species males had two different statistically positive features – body weight and chest size (p< 0,1). Investigated Lithuanian martens from trichinelosis was determined that 8,3 % martens has Trichinella spp. and in 1g. Muscle in average was found 1 this parasite larvae.
3

Potravní ekologie kuny skalní (Martes foina) v ČR / Feeding ecology of the stone marten (Martes foina) in the Czech Republic

Nováková, Lucie January 2014 (has links)
The food of the stone marten (Martes foina) was studied in synantrophic enviroment in four localities. Localities were choosen with the aim to follow an urbanization gradient from the center of the city, through its periphery to small villages. The composition of a diet was studied by non-invasive method, by analysis of faeces. Macroscopic remains of the food were divided into eleven categories (mammals, birds, bird eggs, fish, unidentified vertebrates, invertebrates, fruits, vegetative plant parts, anthropogenic material, stones and unidentified remains). 104 different animal and plant taxa were identified. There was often found anthropogenic material. Differences in the diet according the type of enviroment as well as seasonal changes were investigated by comparing of frequency of occurrence and procentual weight of remains. There were found differences between marten's food in urban and rural enviroment, especially as concerned the categories mammals, birds and fruits. Consumption of mammals follows the urbanization gradient, in urban enviroment it is the lowest, in rural localities it is higher. On the contrary, bird frequence was higher in urban environment, in rural enviroment it was lower. Weight of fruit remains was higher in rural localities than in urban ones. There were also seasonal...
4

Estimating Landscape Quality And Genetic Structure Of Recovering American Marten Populations In The Northeastern United States

Aylward, Cody Michael 01 January 2017 (has links)
The American marten (Martes americana) is an endangered species in Vermont and a Regional Species of Greatest Conservation Need in the northeastern United States. Though historically widespread in northeastern forests, their range presumably contracted to northern Maine and the High Peaks region of the Adirondacks by the early 1900s. Regionally, populations appear to be in recovery. Natural recolonization is believed to have occurred in New Hampshire, northeastern Vermont and the western Adirondacks. A reintroduction effort in southern Vermont that was originally declared unsuccessful is now believed to be the source of a recently detected population in the area. However, our current knowledge of distribution, population history and population connectivity relies primarily on occurrence data from harvest records, which are limited in scope and resolution. In Vermont, where population size is estimated to be extremely low, more robust estimates of population status may be critical to continued recovery. I genotyped individuals from Maine, New York, New Hampshire, northeastern Vermont and southern Vermont at ten microsatellite loci and amplified a 320 base pair segment of the control region of mtDNA to estimate the source(s) of the two Vermont populations using statistical tests of genetic differentiation. I also used Bayesian and stochastic genetic clustering methods to estimate population genetic structure in the northeastern United States. Genetic structure exists at multiple scales in the region as a result of natural barriers to gene flow, human-mediated gene flow, and lineage sorting in relic populations. My results suggest that New Hampshire is a major source of colonization of northeastern Vermont and the population in southern Vermont is either a remnant of the reintroduction or a pre-reintroduction relic that has experienced introgression from the reintroduction stock. I identified three regions where relic populations perceived to be extirpated in the 1900s may have persisted. I also developed an occupancy model for American marten in the northeastern United States using mixed-effects logistic regression based on expert opinion data. Eighteen experts from Maine, New Hampshire, Vermont and New York with backgrounds in trapping, wildlife management, and wildlife science participated in the survey. Experts were asked to estimate the probability of marten occupancy at 30 sites in the northeastern United States. Three top models described the data. Habitat covariates in those models were 1) percent canopy cover, 2) percent spruce-fir forest cover, 3) winter temperature, 4) elevation, and 5) road density. An AIC-weighted average of these three models had significant predictive ability (area under an ROC curve = 0.88) with respect to occurrence records in the northeastern United States. In addition, the model predicted that high quality habitat existed patchily along the central and northern Green Mountain spine in Vermont – where no occurrence records exist for at least a century. Top-scoring movement corridors between southern Vermont and nearby populations in northeastern Vermont/New Hampshire and New York occurred in the northern and central Green Mountains and across high resistance movement barriers in the Champlain valley. Corridors to New York were considered strong movement barriers and are unlikely to facilitate gene flow.
5

Estimating Landscape Quality And Genetic Structure Of Recovering American Marten Populations In The Northeastern United States

Aylward, Cody Michael 01 January 2017 (has links)
The American marten (Martes americana) is an endangered species in Vermont and a Regional Species of Greatest Conservation Need in the northeastern United States. Though historically widespread in northeastern forests, their range presumably contracted to northern Maine and the High Peaks region of the Adirondacks by the early 1900s. Regionally, populations appear to be in recovery. Natural recolonization is believed to have occurred in New Hampshire, northeastern Vermont and the western Adirondacks. A reintroduction effort in southern Vermont that was originally declared unsuccessful is now believed to be the source of a recently detected population in the area. However, our current knowledge of distribution, population history and population connectivity relies primarily on occurrence data from harvest records, which are limited in scope and resolution. In Vermont, where population size is estimated to be extremely low, more robust estimates of population status may be critical to continued recovery. I genotyped individuals from Maine, New York, New Hampshire, northeastern Vermont and southern Vermont at ten microsatellite loci and amplified a 320 base pair segment of the control region of mtDNA to estimate the source(s) of the two Vermont populations using statistical tests of genetic differentiation. I also used Bayesian and stochastic genetic clustering methods to estimate population genetic structure in the northeastern United States. Genetic structure exists at multiple scales in the region as a result of natural barriers to gene flow, human-mediated gene flow, and lineage sorting in relic populations. My results suggest that New Hampshire is a major source of colonization of northeastern Vermont and the population in southern Vermont is either a remnant of the reintroduction or a pre-reintroduction relic that has experienced introgression from the reintroduction stock. I identified three regions where relic populations perceived to be extirpated in the 1900s may have persisted. I also developed an occupancy model for American marten in the northeastern United States using mixed-effects logistic regression based on expert opinion data. Eighteen experts from Maine, New Hampshire, Vermont and New York with backgrounds in trapping, wildlife management, and wildlife science participated in the survey. Experts were asked to estimate the probability of marten occupancy at 30 sites in the northeastern United States. Three top models described the data. Habitat covariates in those models were 1) percent canopy cover, 2) percent spruce-fir forest cover, 3) winter temperature, 4) elevation, and 5) road density. An AIC-weighted average of these three models had significant predictive ability (area under an ROC curve = 0.88) with respect to occurrence records in the northeastern United States. In addition, the model predicted that high quality habitat existed patchily along the central and northern Green Mountain spine in Vermont – where no occurrence records exist for at least a century. Top-scoring movement corridors between southern Vermont and nearby populations in northeastern Vermont/New Hampshire and New York occurred in the northern and central Green Mountains and across high resistance movement barriers in the Champlain valley. Corridors to New York were considered strong movement barriers and are unlikely to facilitate gene flow.
6

Evaluation of Environmental Factors Influencing American Marten Distribution and Density in New Hampshire

Drummey, Donovan 02 April 2021 (has links)
Though the American marten (Martes americana) is widely distributed across northern North America, habitat use and population abundance vary widely across the range. Due to its status as a furbearer, the species has been extensively researched, resulting in a large body of knowledge about the species’ ecology, distribution, and abundance, as well as drivers of population structure and dynamics. More recently, marten research has shifted focus to genetics, habitat associations, and estimation of population state variables. The rapid increase in estimation of states such as occupancy, abundance, and density has likely been driven by the increasing accessibility of noninvasive field technology, such as noninvasive genetic sampling and remote camera trapping, and by the statistical development of ecological hierarchical models. This convergence of advances in field and analytical methods is most apparent in the now widespread application of spatial capture-recapture, an approach that produces robust estimates of population densities and abundance that can be compared across time and space. These new models are especially valuable near the edges of marten distribution where populations are often recovering from historic overexploitation, and expanding into areas they have previously been absent from. In these areas, detailed, landscape-scale understanding of marten populations is necessary in order to establish current conditions, effectively monitor changes, and predict what effect management actions may have on marten populations. I utilized these models to study marten populations in New Hampshire where marten are a species of management interest, and recent recovery has led to their removal from the state endangered species list. Through a collaborative effort with New Hampshire Fish and Game Department in the winters of 2017 and 2018, marten were surveyed across northern New Hampshire using a novel camera trap design that allows for the identification of individuals. These data were analyzed using spatial capture-recapture models, allowing me to evaluate habitat associations that explain spatial variation in marten density and provide a population status assessment for the New Hampshire marten population. Marten densities are highest in the White Mountain National Forest, though other protected lands in northern New Hampshire also appear to support larger populations. The greatest population densities coincided with deeper snows, increased canopy closure, and intermediate boreal biomass. These results provide additional support for several hypotheses explaining marten habitat use across their range while also providing novel insight that will inform active management of both marten and the habitat they occur in. In addition to the population status assessment, I evaluated the relationship between estimates of occupancy and density in New Hampshire. Though utility of non-invasive methodology can decrease research costs, the need for individual identification in spatial capture-recapture models represents a cost increase over occupancy models. My results suggest that the two are positively correlated; however, occupancy is a poor predictor of the entire range of density, especially because the variables used to predict each of the state variables are different. Thus, occupancy is likely not a good proxy for density in New Hampshire, however it could be used to track general trends through time so long as density is re-evaluated periodically.
7

Literatura para ¿todes? : Literatura argentina contemporánea, lenguaje inclusivo y nuevos modos de la subjetividad en un abordaje de dos poemas del poemario colectivo Martes Verde y de la novela Vikinga Bonsái de Ana Ojeda a partir de teorías feministas. / Literature for ¿todes? : Contemporary Argentine Literature, Inclusive Language and New Modes of Subjectivity in a Feminist analysis of two poems in the Collective Poetry Book Martes Verde and the Novel Vikinga Bonsái by Ana Ojeda.

Payva, Marisa January 2020 (has links)
El movimiento #NiUnaMenos en contra del femicidio iniciado en el 2015, las protestas de pañuelos verdes por la sanción de la ley de interrupción voluntaria del embarazo, así como las intervenciones del colectivo LGTBIQ en Argentina han hecho uso del lenguaje inclusivo no binario como una herramienta más en la lucha por la igualdad de derechos de la mujer y de otras minorías. Estos nuevos usos del lenguaje que desafían las normas y estructuras establecidas al intentar incluir identidades históricamente marginalizadas alterando la gramática de la lengua también se manifiestan en un corpus emergente de la literatura argentina contemporánea vinculado con dichos movimientos sociales.En este estudio situamos los usos y funciones de este lenguaje inclusivo en la literatura y en el corriente debate cultural que ha despertado tal gesto literario en la Argentina y, en particular, en el interrogante que plantea tal debate acerca del potencial del lenguaje inclusivo en la literatura para articular nuevas subjetividades más amplias y transformar las sensibilidades (Andruetto, 2019; Sarlo y Kalinowski, 2019). Para examinar este interrogante, en el presente estudio analizamos el uso del lenguaje inclusivo en relación con la articulación de nuevas subjetividades tras dicha ola de movimientos, protestas e intervenciones en un corpus de la literatura argentina contemporánea compuesto por dos poemas extraídos del compilado colectivo Martes Verde (2018) y la novela Vikinga Bonsái (2019) de Ana Ojeda. A partir de un análisis de las obras selectas desde teorías feministas provenientes tanto del contexto anglosajón (Irigaray, 1985, 1992; Butler, 2002) como de los feminismos latinoamericanos (Colanzi, 2019), así como  de la definición de subjetividad en las literaturas postautónomas (Ludmer, 2009, 2012), investigamos la configuración de una nueva subjetividad inclusiva no binaria que surge a través del uso literario del lenguaje inclusivo. En la primera parte del análisis nos concentramos en el poema “La pija de Hegel” del colectivo Máquina de Lavar publicado en Martes verde, donde examinamos cómo el uso inclusivo del lenguaje en paralelo a usos deconstructivos de la tradición filosófica occidental que excluyen a la mujer, construyen una subjetividad de la diferencia (Irigaray, 1985, 1992) respecto de la resignificación de la idea del sexo débil históricamente vinculada a la mujer. En la primera segunda parte del análisis, estudiamos el poema sin título de María Insúa también incluido en Martes verde, donde examinamos cómo el uso inclusivo del lenguaje en relación con una retórica del cuerpo en este poema problematiza la construcción del género en la repetición performativa de actos (Butler, 2002) y la marca que dicha reconstrucción imprime en los cuerpos femeninos. Finalmente abordamos la novela Vikinga Bonsái donde analizamos cómo el lenguaje inclusivo en esta novela plantea un colectivo inclusivo de sororidad cuya sensación de pertenencia e identificación entrelaza el colectivo femenino y LGTBIQ junto con otras identidades marginalizadas que se representan en la novela a partir de lenguajes rurales, locales, digitales e inventados y una polifonía de voces de diversos personajes cuya reunión en comunión potencia su diferencia (Irigaray, 1985, 1992), rompe los actos repetidos que construyen la identidad femenina (Butler, 2002) pero también producen un acto de desobediencia pública rompiendo normas como la familia, y proyectando una subjetividad que traspasa los límites del sujeto individual (Colanzi, 2019). Entre los resultados más sobresalientes, encontramos que, a pesar de las singularidades de cada texto y de los géneros a los que pertenecen (novela, poesía) en los textos literarios estudiados, el lenguaje inclusivo se relaciona predominantemente con escenarios urbanos. Sin embargo, el uso literario de este lenguaje construye una subjetividad más amplia que surge a partir de su interconexión con los movimientos sociales feministas contemporáneos, lo que nos permite proponer que las obras estudiadas acompañan la lucha por la igualdad de derechos sociales. / The #NiUnaMenos movement against femicide in 2015, the green scarf protests for the sanction of the pregnancy voluntary termination law as well as the interventions of the LGTBIQ collective in Argentina have made use of non-binary inclusive language as another tool in the fight for equal rights for women and other minorities. These new language uses that challenge established norms and structures by attempting to include historically marginalized identities by altering the grammar of the language are also manifested in an emerging corpus of contemporary Argentine literature linked to these social movements. In this study we situate the uses and functions of this inclusive language in literature in the current cultural debate in Argentina that has aroused such literary gesture and in the question raised by such debate about the potential of inclusive language in literature to articulate new, broader subjectivities, thus  transforming sensibilities (Andruetto, 2019; Sarlo &amp; Kalinowski, 2019). To examine this question, in this study we analyze the use of inclusive language in relation to the articulation of new subjectivities after the mentioned wave of movements, protests and interventions in a corpus of contemporary Argentine literature composed of two poems included in the collective poetry book Martes Verde (2018) and the novel Vikinga Bonsái (2019) by Ana Ojeda. Based on an analysis of the selected literary works drawing on feminist theories both, from the Anglo-Saxon context (Irigaray, 1985, 1992; Butler, 2002) and Latin American feminisms (Colanzi, 2019) and the definition of subjectivity in post autonomous literatures (Ludmer, 2009, 2012), we investigate the configuration of a new inclusive non-binary subjectivity that arises through the literary use of inclusive language.  In the first part of the analysis, we focus on the poem "La pija de Hegel" by the Máquina de Lavar collective included in Martes verde, where we examine how the inclusive use of language in parallel to deconstructive uses of the philosophical tradition that excludes women, configures a subjectivity of difference (Irigaray, 1985, 1992,) regarding the resignification of the idea of the weaker sex historically linked to women. In the first second part of the analysis, we study the untitled poem by María Insúa also included in Martes verde, where we examine how the inclusive use of language in this poem in relation to a body rhetoric problematizes the construction of gender and the violence that construction imprints on female bodies. Finally, we address the novel Vikinga Bonsái where we analyze how inclusive language in this novel poses an inclusive group of sisterhood whose sense of belonging and identification that interweaves women and LGTBIQ collectives with other marginalized groups represented in the novel by rural, workers, digital and invented languages and a polyphony of voices of various characters whose interaction in communion enhances their difference (Irigaray, 1985, 1992), breaks the repeated acts that build female identity (Butler, 2002) but also produces an act of public disobedience, breaking norms such as the family, and projecting a subjectivity that transcends the limits of the individual subject (Colanzi, 2019). Among the most outstanding results, we found that, despite the singularities of each text and the genres to which they belong (novels, poetry) in the literary texts studied, inclusive language is predominantly related to urban settings. However, the literary use of this language builds a broader subjectivity that arises from its interconnections with the current feminist social movements, which allows us to propose that the works studied accompany the struggle for equal social rights.
8

Fisher Population Ecology on the Hoopa Valley Indian Reservation, Northwestern California

Matthews, Sean Michael 01 May 2012 (has links)
I studied aspects of fisher (Martes pennanti) population ecology on the Hoopa Valley Indian Reservation in northern California to fill critical information gaps relative to timber management and its effect on the status of fishers, a candidate for listing under the U.S. Endangered Species Act. A decline in mark-resight density estimates of fishers from 1998 (52/100 km2; 95% CI = 43-64) to 2005 (14/100 km2; 13-16) was likely due to changes in prey habitat suitability, increased predation pressure, and/or disease. The decline was also indicated by catch-per-unit effort indices, but not by camera station or track-plate station indices. Colleagues and I developed and tested methods of collecting mark-recapture data using genetic marking, passive integrated transponder (PIT) tag technology, and digital, passive-infrared photography that could be used in a demographic monitoring protocol. The comparatively high cost of PIT tag reading equipment and genetic analyses makes the use these methods dramatically more expensive and yield less demographic data compared to using a traditional mark-recapture approach using only live trapping. By monitoring 40 radio-marked, breeding age (> 2 years old) females during 2005-2011, we found that 87% exhibited denning behavior and 65% of these were successful in weaning at least one kit (mean = 1.9). Of 14 kits radio-marked in their first fall, 3 died prior to dispersal, 3 lost collars, and the other 8 established home ranges 0.8-18.0 km away from natal areas. Nipple size (width multiplied by height of the largest anterior nipple), evaluated as a predictive index of female fisher reproductive success, differed among nonbreeders vs. attempted and current breeders. A predictive index for use in assigning reproductive status to females with unknown reproductive histories had an overall correct classification rate of 81% and a chance-corrected measure of prediction of 69.5%. These results illustrate the value in establishing long-term, accurate programs to monitor populations of imperiled species which strive to determine cause and affect relationships to changes in populations and ultimately, modeling habitat fitness. The relatively low reproductive rate of female fishers brings into question the species ability to demographically respond to increased rates of juvenile and adult mortality with increased reproduction and/or survival. The limited dispersal capability of juvenile fishers restricts ability to rescue vanishing local populations from extirpation, re-inhabit landscapes from which they were previously extirpated, and establish the functional connectivity of metapopulations.
9

Measuring wildlife response to seismic lines to inform land use planning decisions in northwest Canada

Tigner, D Jesse Unknown Date
No description available.
10

Recovery measures for the state endangered American marten an internship with two Wisconsin natural resource agencies /

Harvey, Sarah Lynn. January 2004 (has links)
Thesis (M. En.)--Miami University, Institute of Environmental Sciences, 2004. / Title from first page of PDF document. Includes bibliographical references (p. 22-26).

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