Thesis (M.A.)--Carleton University, 1985. / Also available in electronic format on the Internet.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1971. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (M.A.)--Memorial University of Newfoundland, 1974. / Typescript. Bibliography : p. [88]-92. Also available online.

Thesis (M.A.)--Memorial University of Newfoundland. / Also available online.

Thesis (M.A.)--University of New Brunswick, 1995. / Includes bibliographical references.

Larval tabanids were collected twice weekly from eight locations in Iron Arm fen, a peatland in subarctic Labrador near Schefferville, Quebec, June through August, 1990 and 1991. Of the 476 tabanid larvae collected, 82.7% were Chrysops (5 spp.), 17.0% were Hybomitra (5 spp.), and 0.3% were Atylotus sphagnicola Teskey; the most abundant species in the fen were C, zinzalus Philip (31%), and C. nigripes Zetterstedt (24%). Species- and genera-specific microhabitat preferences were apparent; in general Chrysops spp. preferred drier regions of the fen than did Hybomitra spp. Larvae of C. zinzalus and C. nigripes appear to require 3-4 years to complete their larval development in subarctic regions, based upon their patterns of seasonal growth. / Adult horse flies and deer flies were collected using canopy and Malaise traps at two locations in the Schefferville area, Iron Arm fen and Capricorn fen, from late June until early August in 1990 and 1991. Seventeen tabanid species were collected, six Chrysops spp., 10 Hybomitra spp., one Atylotus sp.; Hybomitra spp. comprised 96% of collections. Adult abundance of different species varied markedly between the two study sites; in general Iron Arm fen had a more abundant and diverse tabanid fauna than Capricorn. / For each of 10 tabanid species, samples of 10 flies were taken from daily trap catches for dissection and determination of parity, yolk deposition, and fat body deposition. In the Schefferville area, H. arpadi and H. aequetincta are obligately anautogenous, H. lurida and H. zonalis are facultatively autogenous, and H. pechumani, H. hearlei, H. frontalis (Walker), H. astuta (Osten Sacken), C. zinzalus and C. nigripes are obligately autogenous. Based upon gonotrophic age-grading of nulliparous individuaIs, the majority of H. aequetincta and H. arpadi females emerge either at the beginning of the flight season, midway through the season, or both, depending upon year and site. Most H. zonalis emerge midway through the flight season. Nulliparous female tabanids of anautogenous or facultatively autogenous species usually carry considerable amounts of fat body within their abdomens. / The effect of meterological variables on tabanid daily activity was investigated using a canopy trap incorporating an electronic insect counter, a computerized data-logger, and sensors to measure air temperature, solar radiation, wind speed and direction, and relative humidity. (Abstract shortened by UMI.)

No description available.

Military jet over-flight activities pose a potential threat to staging waterfowl and pilots. The migration period is important for nutrient acquisition and courtship as these waterfowl enter the breeding season. Using a focal animal (continuous) technique for five-minute intervals, diurnal Time/Activity (TA) budgets for Canada Geese (Branta canadensis canadensis) (n=751), American Black Duck (Anas rubripes) (n=474) and Common Goldeneye (Bucephala clangula) (n=1274) were compiled during 216 hours of behavioural observation. The study was conducted from 26 April to 27 May, 2002 at the outlet of Lac Fourmont, Labrador (52° 03' 30"N, 60° 31' 01" W), in an ashkui or area of open water in an otherwise frozen landscape, which is known historically as a place to hunt waterfowl. These staging grounds are within the 130 000 km2 Low-level Training Area (LLTA) of the Quebec-Labrador Peninsula. Generalized Linear Modeling (GLM) of ranked variables was used to analyze behaviour by: observer, sex, pair status, time of day, date, and each weather parameter. Male Common Goldeneye spent more time in courtship behaviours (2.7%) than females (1.1%) and they spent most of the daylight hours feeding (males 53.3% and females 54.5%), with little time resting (4.8% and 5.2%, respectively). In contrast, Black Ducks and Canada Geese spent relatively little time feeding (12.4% and 5% respectively) and most of their time sleeping (35% and 38% respectively) and locomotion (37.8% and 11% respectively). Ashkui are important to Common Goldeneyes for foraging, and to Canada Geese and Black Ducks for resting prior to the breeding season. / Ninety-one low-level jet over-flights occurred and sound levels (n=336 h) at the study site were measured. Effects of low-level jet over-flights were analyzed using GLM of ranked variables in order to analyze a number of variables simultaneously. All behavioural observations that occurred in the quarter hour periods up to 165 minutes after an over-flight were analyzed. Alert and courtship behaviours of Canada Geese increased after over-flights. Other behaviours were negatively affected to a lesser degree. Locomotor activities by Black Ducks increased significantly immediately following over-flights with a stronger movement response with increased noise. Increases in agonistic and comfort behaviours of Common Goldeneye were detected following over-flights with few other significant affects on their behaviour. / Key words. Anas rubripes, Branta canadensis, Bucephala clangula, disturbance, jet aircraft, Labrador, low-level flying, military activity, noise, spring staging, time-activity budgets, waterfowl

A detailed palynological examination was made of Tertiary pollen and spore assemblages from six exploratory wells located along the continental margins of the Labrador Sea. From north to south, the study wells are Kangamiut 1, Hekja 0-71, Karlsefni A-13, Herjolf M-92, Roberval K-92 and Cartier D-70. Using local extinction events of zonally diagnostic species to define the tops of intervals, eight provisional pollen and spore zones were established. The zones and their relative ages are as follows: Tsuga igniculus (middle to late Miocene); Fagus granulata (early to middle Miocene); Parviprojectus sp. A (early Oligocene); Araliaceoipollenites megaporifer (latest Eocene/earliest Oligocene); Rhoipites latus (middle to late Eocene); Pistillipollenites mcgregorii (early to middle Eocene); Tricolpites sp. A (middle to late Paleocene); and Paraalnipollenites alterniporus (early to middle Paleocene). The middle and upper Oligocene is apparently absent in the study welIs. When used in conjunction with dinoflagellate assemblages, the zonation provides the potential for additional biostratigraphic resolution in the Tertiary marine sediments of the Labrador Sea. It is especially useful in upper Eocene and stratigraphically higher sections in which pollen and spores are the dominant component of the palynoflora: In addition, the basic similarity of pollen and spore assemblages across much of northern and western Canada suggests the zonation may also be successfully applied in those regions. The relative abundance and distribution of four major populations (i.e., Paleozoic, Upper Jurassic/Lower Cretaceous, Upper Cretaceous and Paleogene) of redeposited palynomorphs were determined. The species composition of recycled and in-situ Paleogene palynomorphs supports independent clay mineralogical data that much of the sediment (including a high percentage of the palynomorphs) was delivered to offshore Labrador Sea basins via a "super" river system that drained a large portion of the western interior and Arctic regions of Canada during the Tertiary. The taxonomic composition of the indigenous Paleogene pollen and spore flora supports both paleontological and isotope data that relatively high paleotemperatures prevailed at high northern latitudes during the Paleogene. The climatic optimum in the Labrador Sea region was reached in the early to early-middle Eocene. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate

No description available.