410 research outputs found
Jennifer-Angoh/Pine-Marten-Rodent: v.1.0.0
No full text<p>Code for article "How do microtine rodent abundance, snow and landscape parameters influence pine marten Martes martes population dynamics?". Authors: Siow Yan Jennifer Angoh Affiliation: Inland Norway University of Applied Sciences, NO-2480, Koppang, Norway. Corresponding author: Siow Yan Jennifer Angoh, [email protected], ORCID: <a href="https://orcid.org/0000-0002-3791-0150">https://orcid.org/0000-0002-3791-0150</a></p>
<p><strong>Full Changelog</strong>: <a href="https://github.com/Jennifer-Angoh/Pine-Marten-Rodent/commits/Pine-Marten-Rodent">https://github.com/Jennifer-Angoh/Pine-Marten-Rodent/commits/Pine-Marten-Rodent</a></p>
Jennifer-Angoh/Pine-Marten-Rodent: v.1.0.1
No full text<p>Code for article "How do microtine rodent abundance, snow and landscape parameters influence pine marten Martes martes population dynamics?". Authors: Siow Yan Jennifer Angoh Affiliation: Inland Norway University of Applied Sciences, NO-2480, Koppang, Norway. Corresponding author: Siow Yan Jennifer Angoh, [email protected], ORCID: <a href="https://orcid.org/0000-0002-3791-0150">https://orcid.org/0000-0002-3791-0150</a></p>
<p><strong>Full Changelog</strong>: <a href="https://github.com/Jennifer-Angoh/Pine-Marten-Rodent/commits/Pine-Marten-Rodent">https://github.com/Jennifer-Angoh/Pine-Marten-Rodent/commits/Pine-Marten-Rodent</a></p>
An Interview with Eugene Marten
No full textEugene Marten – An IntroductionBy Stéphane VanderhaegheEugene Marten is the author of five novels: In the Blind (2003), Waste (2008), Firework (2010), Layman’s Report (2013), and Pure Life (2022). Of Marten, besides that, we don’t know much. He won’t be found on social media, he doesn’t have a website nor does he blog his opinions on this or that topic. He seems to be the type of writer who would do anything to fly below the radars, especially the scholarly ones: he doesn’t appear to spend m..
Carnivore Contact: A Species Fracture Zone Delineated Amongst Genetically Structured North American Marten Populations (Martes americana and Martes caurina)
No full textNorth American martens are forest dependent, influenced by human activity, and climate
vulnerable. They have long been managed and harvested throughout their range as
the American marten (Martes americana). Recent work has expanded evidence for the
original description of two species in North America — M. americana and the Pacific
Coast marten, M. caurina — but the geographic boundary between these groups
has not been described in detail. From 2010 to 2016 we deployed 734 multi-taxa
winter bait stations across a 53,474 km2 study area spanning seven mountain ranges
within the anticipated contact zone along the border of Canada and the United States.
We collected marten hair samples and developed genotypes for 15 polymorphic
microsatellite loci for 235 individuals, and 493 base-pair sequences of the mtDNA
gene COI for 175 of those individuals. Both nuclear and mitochondrial genetic structure
identified a sharp break across the Clark Fork Valley, United States with M. americana
and M. caurina occurring north and south of the break, respectively.We estimated global
effective population size (Ne) for each mountain range, clinal genetic neighborhood sizes
(NS), calculated observed (Ho) and expected (He) heterozygosity, fixation index (FST /,
and clinal measures of allelic richness (Ar), Ho, and inbreeding coefficient (FIS). Despite
substantial genetic structure, we detected hybridization along the fracture zone with
both contemporary (nuclear DNA) and historic (mtDNA) gene flow. Marten populations
in our study area are highly structured and the break across the fracture zone being
the largest documented in North America (FST range 0.21–0.34, mean = 0.27). With
the exception of the Coeur d’Alene Mountains, marten were well distributed across
higher elevation portions of our sampling area. Clinal NS values were variable suggesting
substantial heterogeneity in marten density and movement. For both M. americana and
M. caurina, elevationaly dependent gene flow and high genetic population structure
suggest that connectivity corridors will be important to ensuring long-term population
persistence. Our study is an example of how a combination of global and clinal molecular
data analyses can provide important information for natural resource management.Peer reviewedeffective population sizegene flowgenetic structureMartes americanaMartes caurinaspatial genetic distancetaxonom
Eliminare l’impossibile: Darwin, Winwood Reade e l’adagio di Sherlock Holmes
No full textThis essay looks at the origin and success of Sherlock Holmes’s most famous maxim: “when you have eliminated the impossible, whatever remains, however improbable, must be the truth”. Arthur Conan Doyle’s repeated use of the phrase in numerous Sherlock Holmes stories published between 1892 and 1927 shows that the author was fully aware of the rhetorical power of the expression. But what ended up as a motto for the detective’s methods of investigation was initially the expression of a Darwinian discourse in The Sign of Four, the novel in which the adage was first formulated
Reporting the Death of Charles Kingsley: The Early Biographical Reaction in Newspapers and Magazines
No full textThere has long been a lively academic interest in the Victorian author, Christian Socialist and Church of England priest Charles Kingsley. Yet it is only as a minor author that he takes his place in English Literature. As a thinker he is hardly influential today, and as a consequence his works are little read by the general public. Apart from his children’s book The Water-Babies, few of his published works are still in print. But what were the assessments of his importance in the weeks following his death? What did his contemporaries think of a man who during his life was a most influential, and often very controversial, public figure? This essay looks at the reactions in the obituaries that appeared all over the world in the first weeks following Kingsley’s death. These publications are a measure of what people in 1875 thought were his best works and his main qualities, thus revealing to what extent, at the time of his demise, his contemporaries still thought him representative of their generation
Charles Lyell’s Churches and the Erosion of Faith in Matthew Arnold’s ‘Dover Beach’
No full textThe author discusses how in the poem “Dover Beach” (1851-52) Matthew Arnold engages with literary texts of the past as well as with works of contemporary writers. Thus parallels in Arnold’s text with passages written by Charles Augustin Sainte-Beuve, Thucydides, Arthur Clough, William Shakespeare, and William Wordsworth are highlighted. Special attention is paid to Arnold’s metaphor of the retreating tide of the sea of faith by linking it to the processes of erosion described in great detail in the first volume of Charles Lyell’s influential Principles of Geology (1830), and it is argued that the numerous descriptions and woodcuts of collapsing churches along the British coast in this volume might have inspired Arnold to represent the loss of faith as a process of erosion
Behavior and distribution of American marten (Martes americana) in relation to snow and forest cover on the Kenai Peninsula, Alaska
No full textDepartment Head: Kenneth Ray Wilson.2009 Summer.Includes bibliographical references (pages 49-53).Marten are sensitive to cold temperatures and normally rely on an insulating snow-pack and sufficient forest structure for thermal protection in winter. Low densities of marten on the western Kenai Peninsula, Alaska have commonly been attributed to shallow snow and habitat conditions that may not be conducive to supporting stable marten populations. This research examined the interactions between marten behavior in relation to available snow and habitat conditions at forest stand, home range, and landscape scales. Marten were radio-collared and back-tracked in three study areas in the Kenai Mountains and Kenai Lowlands to investigate habitat selection and the effects of snow conditions on the movement and resting behavior of marten. An aerial digital videography survey, supplemented by trapping, museum and Kenai National Wildlife Refuge (KENWR) records, was used to generate a minimum landscape distribution estimate of marten on the Kenai Peninsula. Videography detections were overlaid with Geographic Information Systems (GIS) layers for spruce-bark beetle damage and fire history on the Kenai Peninsula. We also tabulated the number of days marten were exposed to conditions in which the subnivean environment was not insulated from below freezing ambient temperatures. Trends in maximum snow depths were calculated by fitting regression lines to historic snow records at Kenai weather stations since 1931.Results demonstrated that marten chose rest sites in structures that would maximize thermodynamic efficiency given the availability of insulating snow cover and warm resting structures. While traveling, marten selected snow and habitat types largely in proportion to their availability at the home-range scale. Movement paths were more tortuous through habitat patches with higher than average canopy densities. Aerial videography surveys detected 32 locations of marten and indicated that the distribution of marten has expanded into the Kenai Lowlands where marten had previously not been reported in any abundance since the beginning of the 20th century. Detections occurred four times as frequently in a large post fire sere burned in 1947 in contrast to an area burned in 1969. Marten were detected in areas extensively damaged by spruce-bark beetles in just six instances and were twice as likely to be located outside of beetle-damaged areas. Average numbers of stress days were inversely related to elevation and the associated differences in snowfall associated with elevation. Analyses of regional maximum yearly snow depths indicated that maximum snow depths have been increasing by 0.29 cm/year in the Kenai Mountains, whereas trends have remained relatively constant in other regions of the Kenai Peninsula. Variations in available snow pack, forest maturity and the availability of resting structures may explain recent shifts in distribution at the landscape level
Richard Pococke and the Natural Curiosities of the East
No full textIn 1736 Richard Pococke set out on his second Grand Tour. For a year and a half he and his cousin Jeremiah Milles visited large parts of The Netherlands, Germany, Austria and Italy, but in September 1737 Pococke decided to continue alone to the East. This essay traces Pococke's travels and his interest in Natural History of the East. After examining in detail his collecting habits and the publication of scientific details in his travelogues, the author concludes that Pococke was a keen collector of natural curiosities rather than an experienced and scientifically inclined naturalist
Pacific marten (Martes caurina) as an apex predator : the habitat and diet ecology of an insular population of mesocarnivore on Haida Gwaii
No full textPacific marten (Martes caurina) may benefit from invasive or non-native species that occur across some coastal areas of the Pacific Northwest. I used remote-camera trapping and stable-isotopes of carbon and nitrogen to infer resource-use strategies of marten on Haida Gwaii, British Columbia, Canada. Marten are more likely to be detected in 3 ha patches with less logging and optimal amounts of road and forest edge habitat, and areas close to marine shorelines and streams. Findings from bulk carbon and nitrogen stable-isotope analysis suggest that terrestrial fauna, including birds, deer, small mammals, and invertebrates, contribute the most to diet; marine invertebrates are the second-most important prey group. Marten consume salmon and berries seasonally, but these are a relatively minor component of the diet. Knowledge of habitat and diet ecology of this generalist, apex predator should be integrated into ecosystem-based management and conservation of the globally rare old-growth forests that remain relatively intact on Haida Gwaii
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