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46 results for “Rangifer tarandus”
FIG. 4 in A zooarchaeological study of Rangifer tarandus (Linnaeus, 1758) from the Croxton site in Brooks Range, Alaska, and implications for utility analysis
FIG. 4. — Split caribou (Rangifer tarandus (Linnaeus, 1758)) right metatarsal with impacts on opposing surfaces. After being split and discarded, the bone
FIG. 1 in A zooarchaeological study of Rangifer tarandus (Linnaeus, 1758) from the Croxton site in Brooks Range, Alaska, and implications for utility analysis
FIG. 1. — Map showing the locations of the Croxton archaeological site and the modern village of Anaktuvuk Pass along the north slope of the Brooks Mountain Range, Alaska, United States.
Rangifer tarandus (Cervidae) - whole organism
Image of Rangifer tarandus (Cervidae) - whole organism
Fig. 2 in Apparent fatal winter tick (Dermacentor albipictus) infestation in captive reindeer (Rangifer tarandus)
Fig. 2. Dorsal (A) and ventral view (B) of an adult female Dermacentor albipictus collected from captive reindeer. Inset image shows large goblet cells on the spiracular plate.
Fig. 1 in Pathology, clinical signs, and tissue distribution of Toxoplasma gondii in experimentally infected reindeer (Rangifer tarandus)
Fig. 1. Brain squash picture of T. gondii tissue cyst of reindeer 2 brain visualized on compound microscopy (60×).
Fig. 2 in Pathology, clinical signs, and tissue distribution of Toxoplasma gondii in experimentally infected reindeer (Rangifer tarandus)
Fig. 2. Histological section of reindeer 3 diaphragm containing a T. gondii cyst visualized at 100× with oil immersion after immunohistochemical stain.
Fig. 8 in Osteometric analysis of the scapula and humerus of Rangifer tarandus and Cervus elaphus: A contribution to the discrimination of Late Pleistocene cervids
Fig. 8. Morphological features distinguishing the distal portion of the humerus of Rangifer tarandus (A) and Cervus elaphus (B), in anterior (A1, B1), distal (A2,B2), and posterior (A3,B3) views (modified from Breda 2005).
Fig. 7 in Osteometric analysis of the scapula and humerus of Rangifer tarandus and Cervus elaphus: A contribution to the discrimination of Late Pleistocene cervids
Fig. 7. Morphological features distinguishing the proximal portion of the humerus of Rangifer tarandus (A) and Cervus elaphus (B) (modified from Pales and García 1981).
Fig. 6 in Osteometric analysis of the scapula and humerus of Rangifer tarandus and Cervus elaphus: A contribution to the discrimination of Late Pleistocene cervids
Fig. 6. Scatterplots of different combinations of scapular measurements and indices for Rangifer tarandus and Cervus elaphus from Kiputz IX (southern Pyrenees, Spain), Late Pleistocene. Abbreviations: GLP, greatest anteroposterior length of the glenoid process; LG, greatest anteroposterior length of the glenoid cavity; SLC, minimum diameter of the scapular neck.
Fig. 3 in Osteometric analysis of the scapula and humerus of Rangifer tarandus and Cervus elaphus: A contribution to the discrimination of Late Pleistocene cervids
Fig. 3. Osteological measurements of the scapula (A, B) and the humerus (C, D) (modified from Weinstock 2000a). All drawings are based on Rangifer tarandus.
Fig. 4 in Osteometric analysis of the scapula and humerus of Rangifer tarandus and Cervus elaphus: A contribution to the discrimination of Late Pleistocene cervids
Fig. 4. Morphological features distinguishing the scapulae of the cervid mammals Rangifer tarandus, BGG KI-IX.2D.39.618 (A) and Cervus elaphus, BGG KI-IX.2C.28.142 (B), from Kiputz IX (southern Pyrenees, Spain), Late Pleistocene, in lateral (A 1, B 1) and distal (A 2, B 2) views; α, the angle formed by the glenoid cavity and the supraglenoid tubercle.
Fig. 9 in Osteometric analysis of the scapula and humerus of Rangifer tarandus and Cervus elaphus: A contribution to the discrimination of Late Pleistocene cervids
Fig. 9. Scatterplot of the greatest breadth of the trochlea (BT) vs. the depth of the distal epiphysis (Dd) of the humerus of Rangifer tarandus and Cervus elaphus from Kiputz IX and other European sites.
Metabolizable energy and biomass of plants consumed by caribou (Rangifer tarandus) in tundra communities of northern Alaska and deer (Odocoileus spp.) in forests and grasslands of Washington, United States of America
<p>A ubiquitous interaction operates at the base of food webs in many terrestrial ecosystems of the world, creating the foundation for bottom-up regulation of consumers. This interaction plays out as follows. Populations of herbivores deplete plant biomass by foraging. Increasing herbivore population size intensifies this depletion, which in turn, creates a negative feedback regulating herbivore population growth. Large herbivores and the plants they consume offer a useful system for studying this interaction because populations of large herbivores are often regulated by density dependence, defined as the reduction in the per-capita growth rate that occurs as populations grow. Diminished body mass of individuals has been repeatedly observed in high-density populations, implicating plant-mediated, diminished nutrition as the primary cause of density dependence. However, there is no general explanation for why these nutritional deficiencies occur. The data deposited here were used to demonstrate fit new model of the feedbacks from plant biomass to herbivores. The model shows how reduced nutrition of herbivores can result from increased dilution of metabolizable energy in the plant tissue they consume as populations grow even when a large fraction of the consumable plant biomass remains uneaten. This result provides a tidy, mechanistic explanation for bottom-up control of population dynamics of primary consumers in a "green world." </p>
Metabolizable energy and biomass of plants consumed by caribou (Rangifer tarandus) in tundra communities of northern Alaska and deer (Odocoileus spp.) in forests and grasslands of Washington, United States of America
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Selection of summer feeding sites and food resources by female migratory caribou (Rangifer tarandus) determined using camera collars
<p>Female migratory caribou (Rangifer tarandus) depend on the availability of summer habitat resources to meet the needs associated with lactation and the accumulation of fat reserves to survive when resources are less abundant. Because of the large scales at which habitat and resource data are usually available, information on how female migratory caribou select habitat and resources at fine scales in the wild is lacking. To document selection of summer feeding sites, we equipped 52 female caribou with camera collars from 2016 to 2018. We collected a total of 65,150 10-sec videos between June 1st and September 1st for three years with contrasted spring phenology. We determined the selection at the feeding site scale (3rd scale of Johnson) and food item scale (4th scale of Johnson) using resource selection probability functions. This data base contains the data of the behaviors observed, habitat used as feeding site, habitat unused has habitat, consumed and unconsumed resources, insect presence and other variables.</p>
Evaluating the use of hair as a non-invasive indicator of trace mineral status in woodland caribou (Rangifer tarandus caribou)
<p>Trace mineral imbalances can have significant effects on animal health, reproductive success, and survival. Monitoring their status in wildlife populations is, therefore, important for management and conservation. Typically, livers and kidneys are sampled to measure mineral status, but biopsies and lethal-sampling are not always possible, particularly for Species at Risk. We aimed to: 1) determine baseline mineral levels in Northern Mountain caribou (<em>Rangifer tarandus caribou</em>; Gmelin, 1788) in northwestern British Columbia, Canada, and 2) determine if hair can be used as an effective indicator of caribou mineral status by evaluating associations between hair and organ mineral concentrations. Hair, liver, and kidney samples from adult male caribou (n<sub>Hair</sub>= 31; n<sub>Liver</sub>, n<sub>Kidney</sub>= 43) were collected by guide-outfitters in 2016-2018 hunting seasons. Trace minerals and heavy metals were quantified using inductively-coupled plasma mass spectrometry, and organ and hair concentrations of same individuals were compared. Some organ mineral concentrations differed from other caribou populations, though no clinical deficiency or toxicity symptoms were reported in our population. Significant correlations were found between liver and hair selenium (rho=0.66, p<0.05), kidney and hair cobalt (rho=0.51, p<0.05), and liver and hair molybdenum (rho=0.37, p<0.10). These findings suggest that hair trace mineral assessment may be used as a non-invasive and easily-accessible way to monitor caribou selenium, cobalt, and molybdenum status, and may be a valuable tool to help assess overall caribou health.</p>
Fig. 1 in Apparent fatal winter tick (Dermacentor albipictus) infestation in captive reindeer (Rangifer tarandus)
Fig. 1. Captive reindeer skin densely infested by Dermacentor albipictus.
Fig. 1 in Osteometric analysis of the scapula and humerus of Rangifer tarandus and Cervus elaphus: A contribution to the discrimination of Late Pleistocene cervids
Fig. 1. Geographic location of Kiputz IX (Mutriku, Gipuzkoa).
Fig. 2 in Osteometric analysis of the scapula and humerus of Rangifer tarandus and Cervus elaphus: A contribution to the discrimination of Late Pleistocene cervids
Fig. 2. Stratigraphic section and radiocarbon dates for the locality of Kiputz IX.
Fig. 1 in Taenia lynciscapreoli in semi-domesticated reindeer (Rangifer tarandus tarandus, L.) in Sweden
Fig. 1. Taenia lynciscapreoli. Photo Anton de Jong, SVA.
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