Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Holarctic"”.
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Molecular systematics and biogeography of the Holarctic smelt family Osmeridae (Pisces)
… responsible for driving diversification in the Holarctic region. Although terrestrial flora and fauna have been well studied, much of the marine biogeographic work addresses patterns and processes occurring over a relatively recent timescale. A prerequisite to comparative biogeographic analysis …
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Dispersion patterns of Holarctic-breeding, migrant landbirds : global paradigms or regional patterns?
This study quantifies the breeding and wintering ranges, habitat occupancy, diet and foraging mode of each migrant taxon on each of the three flyways. It aims to compare how patterns of migration between the temperate and tropical latitudes vary spatially in response to a) the geography of the land …
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BERINGIAN BIOGEOGRAPHY: PATTERNS OF INTERCONTINENTAL DISPERSAL AND THE STRUCTURING OF A HOLARCTIC TAPEWORM GENUS
… of transberingian colonization events within the Holarctic tapeworm genus, <em>Arostrilepis </em>Mas-Coma & Tenora, 1997. I performed maximum likelihood and multi-locus coalescent phylogenetic reconstructions using mitochondrial and nuclear DNA sequences. Biogeographic ancestral range estimations …
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Using Molecular Diagnostics Based On Internal Transcribed Spacer 2 Sequence To Study Geographical Distribution of Holarctic Malaria Mosquitoes
… has been no recent significant research for Holarctic Anophelines. In particular, in North America and Eurasia, because of the eradication of malaria in the northern territories and the focus on other diseases transmitted by Aedes and Culex mosquitoes. In this study, we first look at the …
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Systematics and Biogeography of the Sawfly Genus Pristiphora Latreille (Hymenoptera: Tenthredinidae) in North America
… loci – obtained from specimens from across the Holarctic region – which is subsequently used to reconstruct the genus’ biogeographic history; and third, by investigating the recent phylogeographic history of the common and widespread Holarctic species Pristiphora cincta Newman. In this …
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Natural history and ecological observations of a population of Conhaway crayfishes and their symbiotic branchiobdellidan associates
Crayfish throughout the holarctic are found in association with an order of worms known as branchiobdellidans. This relationship has been confirmed as a cleaning symbiosis in several species. The Conhaway crayfish, Cambarus appalachiensis, is a species of crayfish endemic to the New River Basin in …
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The Mongolian Remodeling and the structure of Anoplocephalid cestode diversity
… Anoplocephalidae) infect rodents throughout the Holarctic and present an opportunity to investigate the consequences of ecological disruption on the diversity of parasites. Here, I use whole mitogenome sequencing to produce a well-resolved phylogeny showing relationships within the …
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WOLF HOMESITE SELECTION AND DEN CHARACTERISTICS IN NORTHERN MINNESOTA
… inhabit a wide range of ecosystems across their Holarctic distribution.</p>
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Phylogenetic Systematics of Snubnose Darters (Percidae, Etheostoma), With Discussion of Reproductive Behavior, Sexual Selection, and the Evolution of Male Breeding Color
… the family Percidae (North American darters and Holarctic perches and walleye). In the past 20 years, many new species have been described and much work has been done on the behavior of these fishes. However, phylogenetic relationships both among snubnose darter species and between snubnose …
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Bionomy and host plant finding in oil collecting bees
… their brood cells. The only oil flowers in the Holarctic are species in the genus Lysimachia. About 40 % of the species in this genus secrete floral oils and these species are almost exclusively pollinated by oil collecting bees of the genus Macropis, whereas non-oil species in this genus are …