Global ETD Search

21	Data v obchodní databázi CITES a jejich interpretace / Data in the CITES trade database and their interpretation VRŠECKÁ, Lucie January 2016 (has links) An international trade in endangered species of plants and animals is regulated by CITES (the Convention on International Trade in Endangered Species of Wild Fauna and Flora). Information on trades are available in CITES Trade Database. However, there are a lot of mistakes and discrepancies in this database that lead to inaccurate interpretation of data. The aim of this thesis was to: (1) identify mistakes in the database, record types and their possible ways of interpretation and (2) quantify the volumes of trade based on different ways of data interpretations in selected species of the family Ursidae. There were found 19 different combinations of missing data, except by unlisted unit and traded quantity specified only by one state of the trade and 5 types of record interpretation. Data were compared with the CITES annual records reported by the Ministry of the Environment of the Czech Republic. This thesis contains also recommendations for evaluation of international trade.
22	Differentiating Black Bears (Ursus americanus) and Brown Bears (U. arctos) using Linear Tooth Measurements and Identification of Ursids from Oregon Caves National Monument Bogner, Emily 01 May 2019 (has links) (PDF) North American black bears and brown bears can be difficult to distinguish in the fossil record due to similar dental and skeletal morphologies. Challenges identifying ursid material from Oregon Caves National Monument (ORCA) called for an accurate tool to distinguish the species. This study utilized a large database of lower tooth lengths and ratios in an attempt to differentiate black and brown bears in North America. Further, this project examined how these linear measurements differ geographically. Analysis of variance (ANOVA) found significant differences between black and brown bears from across North America for every variable studied. Stepwise discriminant analyses (DA) found lengths separated species better than ratios. When sexes were analyzed, ANOVA only found significant differences for lengths while DA found lengths and ratios could not accurately distinguish between sexes. Fossil specimens from North America, including ORCA specimens, demonstrated the utility of this study, supporting several identifications and questioning others. Quaternary Bears Bergamn’s Rule Oregon Caves National Monument Ursus americanus Ursus arctos Evolution Integrative Biology Other Ecology and Evolutionary Biology Population Biology
23	Getting to the root of the matter: grizzly bears and alpine sweetvetch in west-central Alberta, Canada Coogan, Sean C P Unknown Date No description available. alpine sweetvetch Hedysarum alpinum grizzly bear Ursus arctos functional response habitat segregation resource selection sexual dimorphism Pacific Decadal Oscillation nutritional landscape spatial variation temporal variation crude protein consumer-resource dynamics
24	Dall sheep (Ovis dalli dalli), grizzly bear (Ursus arctos) and wolf (Canis lupus) interactions in the Northern Richardson Mountains, Canada Lambert Koizumi, Catherine M S Unknown Date No description available. Dall sheep Ovis dalli dalli Grizzly bear Ursus arctos Wolf Canis lupus Northwest Territories Yukon Territory Predator-prey interactions Indirect effects of predation Traditional ecological knowledge Vigilance behaviour Sexual segregation Habitat utilization analysis Nutritional ecology Home range overlap

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