45 research outputs found

    Population dynamics of fruitflies in British Columbia

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    Fluctuations in the populations of three species of the genus Drosophila were studied for fourteen months at an isolated fruitdump in the southern Okanagan Valley of British Columbia. The fruitdump was considered to provide ideal conditions for overwintering since it contained vast quantities of food and generated abundant heat. However, only D. hydei overwintered, whereas D. pseudoobscura and D. melanogaster did not. D. hydei seemed to occupy the most desirable location on the fruitdump, to the exclusion of the other species. None of the three species oversummered at the dump. The question of maintenance of D. pseudoobscura and D. melanogaster populations is discussed

    A General Theory of Egg Production

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    8 pages, 1 article*A General Theory of Egg Production* (Fitz-Earle, Malcolm; McMillan, Ian; Butler, Leonard; Robson, Douglas) 8 page

    Living design: the integration of biological systems into products

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    Bibliography: p. 60-62Approval page missing and supervisor unknown
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