Equipment was designed and constructed to monitor automatically and unobtrusively up to twelve physiological variables on a human subject engaged in a prolonged field exercise. Inputs from transducers are sampled in turn, and are encoded into 7-digit PCM. They are then recorded on a small tape-recorder worn by the subject. All equipment is battery-operated, but the recorder and digital circuitry is energized for only 1/2 second every 30 seconds. This, permits recording for over 24 hours without interruptions for a change of battery or tape cassette. A decoder and de-commutator were built so that the tapes can be played back later in the laboratory. Selected parameters can be viewed on an oscilloscope or plotted on a chart-recorder. Overall accuracy of the system is 1%. Two types of transducers have been developed: one measures the heart rate and the other the skin temperature. Other transducers remain to be developed. Component circuits were tested at varying environmental temperatures, and a prototype of the whole system was tested on an arctic exercise. / Applied Science, Faculty of / Electrical and Computer Engineering, Department of / Graduate

Studying the winter ecology of freshwater fishes has been a focus of much past and present research. Because of obvious constraints with studying fish in situ during the winter, few studies have made links between laboratory findings and observations made in the natural environment. Recently, new developments in biotelemetry have provided a way of assessing the winter ecology of fish in a natural setting. At present, however, there are few, if any, studies that attempt to make direct links between field and laboratory results. This research focuses on the reaction of largemouth bass (Micropterus salmoides) to winter conditions using both biotelemetry and laboratory components. In the first part of the study, biotelemetry-derived swimming activity is assessed across a range of temperatures (4.0-25°C). As well, swim tunnel-derived Ucrit swimming speeds and burst swimming ability across similar temperatures were evaluated. In both cases, swimming activity and speeds decreased as temperatures decreased. In biotelemetry-derived measurements, swimming activities increase late in winter, possibly suggesting acclimatization. In the second part of the study the effect of hypoxia on winter habitat selection was investigated. Biotelemetry-obtained locations of largemouth bass were compared to the distribution of dissolved oxygen throughout the lake at numerous times throughout the winter. In addition, experiments were conducted in a laboratory setting on winter juvenile fish to determine the behavioural and physiological impacts of hypoxia. The results of these experiments revealed a behavioural response in the lab and habitat avoidance in the field at an environmental oxygen level of approximately 2 mg/L of dissolved oxygen. The combination of biotelemetry with laboratory data has demonstrated that more informative results about the winter ecology of freshwater fishes can be derived. In the future, usefulness of this combined approach in assessing the impacts of climate change on fish populations will be invaluable. / Thesis (Master, Biology) -- Queen's University, 2007-08-28 13:59:30.215

No description available.

No description available.

Thesis (M.S.)--West Virginia University, 2000. / Title from document title page. Document formatted into pages; contains xi, 97 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 85-97).

Thesis (Ph.D.)--University of Waikato, 2010. / Title from PDF cover (viewed July 28, 2010) Includes bibliographical references (p. 118-122)

This work describes the development of a phase measurement equipment for use in a passive biotelemetric system, whose system and measurement technique were developed before in the Biotelemetry Laboratory of the UTFPR. Based on a new technique and phase measurement system developed in this work it was possible to implement an equipment to measure the input phase impedance of the conceived biotelemetric system. A new calibration method and its respective system are described, which has shown to be efficient and provided the aimed linearity response of the corresponding intracorporeal temperature. The experiments have shown that the equipment and the biotelemetric system resulted in temperature measurements, for the range from 30 to 45ºC, with errors down to ± 2% and with resolution of 0,1 degree in temperature, considering that the distance between the interrogator and implantable coil was 10 mm, whereas the maximum distance was 16 mm. The repeatability of 50 measurements accomplished by the equipment was calculated, resulting in errors below ± 3% referred to its mean. / O presente trabalho apresenta o desenvolvimento de um equipamento para a medição da fase da impedância de entrada de um sistema de biotelemetria passiva, cujo sistema e técnica de medição foram desenvolvidos anteriormente no Laboratório de Biotelemetria da UTFPR. A partir de uma nova técnica e sistema de medição de fase desenvolvidos neste trabalho, foi possível implementar um equipamento capaz de mensurar a fase da impedância de entrada do sistema de biotelemetria concebido. Um novo método de calibração e seu respectivo sistema também são apresentados, os quais se mostraram eficientes e proporcionaram a linearidade da resposta obtida para a grandeza avaliada, a qual consiste da temperatura intracorpórea. Os experimentos realizados mostraram que o equipamento e o sistema de biotelemetria possibilitaram medições de temperatura, para a faixa de 30 a 45ºC, com erros inferiores a ± 2% e com resolução de décimos de grau em temperatura, considerando uma distância de 10 mm entre a bobina de leitura e a do implante, sendo que o alcance máximo foi de 16 mm. A repetibilidade de 50 medições feitas pelo equipamento foi avaliada, resultando em erros inferiores a ± 3% com relação à média.

A general property of animal populations is their failure to continue increasing in number indefinitely, even when the habitat may contain enough resources to support more animals than are present at the time. Certain populations of blue grouse have expressed this property by failing to increase when the habitat has undergone changes that have produced striking increases in past cases. Other populations have expressed it by arresting their increase before the resources of the habitat were exhausted. In blue grouse populations on Vancouver Island, adult mortality is constant and it is restricted recruitment that has held these populations stable in the periods they have been studied, even though sufficient young have been produced to support an increase. The hypothesis that the behavior of territorial adult males affects the local occurrence of recruits and other grouse in general on the summer range was tested by studying dispersion during the breeding period. Information on dispersion and social behavior were obtained from nine grouse fitted with miniature radio transmitters. Data from non-instrumented birds supplement this work. The principal finding is that there was no evidence of social interaction causing females and immature males to occur in special places, and that no interaction of a sort that could affect recruitment occurs between blue grouse on their summer range. It is alternatively suggested that such behavior occurs in winter. Other conclusions are that the onset of estrus induces hens to seek out and become localized near a mate, that several hens may seek out the same mate, and that no lasting pair-bonds are formed. Each type of reproductive activity in blue grouse has a distinctive movement pattern, and perhaps movement rate, associated with it. Excepting for hens In estrus who briefly seek out mates, and some yearling males who are prevented by adults from remaining on territories, movements and local occurrence within the breeding range are unaffected by social interaction with other grouse. / Science, Faculty of / Zoology, Department of / Graduate

No description available.

Thesis (M.S.)--West Virginia University, 2001. / Title from document title page. Document formatted into pages; contains vii, 95 p. : ill. (some col.), maps (some col.). Vita. Includes abstract. Includes bibliographical references (p. 51-55).