Now showing items 21-30 of 195
Photos of remote labs and DE student.
A Centenary Survey of Orbits of Co-Orbitals of Jupiter
Jupiter’s Trojan asteroids fulfill the prediction of Lagrange that orbits can be stable when a small body orbits in specific locations relative to its ‘parent’ planet and the Sun. The first such Trojan asteroid was discovered ...
Relating feeding rates to sex and size in six species of grasshoppers (Orthoptera: Acrididae).
(Canadian Entomologist, 1984)
Nymphs and adults of both sexes of six species of grasshoppers. Camnula pellucida, Dissosleira carolina, Melanoplus infantilis. M. sanguinipes, M. packardii and M. bivillalus, were fed wheat seedlings to determine daily ...
Re-description of Togwoteeus biceps (Arachnida, Opiliones, Sclerosomatidae) with notes on its morphology, karyology and phenology.
(Journal of Arachnology, 1997)
The harvestman genus Togwoteeus Roewer 1952 is monotypic. Its only species, T. biceps (Thorell 1877), is known from throughout western Canada and USA and is newly recorded from California, Nebraska, Nevada, Oregon, South ...
Selective predation in a euryphagous invertebrate predator, Pardosa vancouveri (Arachnida, Araneae)
(Canadian Entomologist, 1982)
Selective predation (i.e., non-random feeding) was studied in a laboratory system that allowed individual lycosid spiders, Pardosa vancouveri, to feed on prey populations consisting of one or two kinds of insects. Various ...
Postmortem on a Distance Education Course: Successes and Failures
(American Journal of Distance Education, 1992)
Athabasca University (AU) is an open university committed to delivering courses via distance education technology. In 1973, AU started work on "World Ecology: The Scientific Context" as its first home study course. This ...
Overwintering aggregations of Leiobunum paessleri in caves and mines (Arachnida, Opiliones).
(Journal of Arachnology, 1984)
In the forested mountain areas of southwestern Canada, Leiobunull1 paessleri (Roewer) form overwintering aggregations in the twilight regions of moist caves and mines. Each aggregation consists of adults of both sexes ...
A blind Homolophus biceps (Arachnida, Opiliones)
(Entomological News, 1983)
Scanning electron microscopy of a harvestman, Homolophus biceps. that lacked both eyes and ocular tubercle revealed no indication of external damage or healing. Internally, light microscope sections showed no evidence ...
Laboratory work in distance education
(Distance Education, 1982)
A major concern in distance education is how to overcome the problems associated with laboratory components of courses. In this paper we review the general importance of laboratory work for students, summarise the ...
Prairie spiders of Alberta and Saskatchewan
(Arthropods of Canadian Grasslands, 2002)
In the prairie ecozone of Alberta and Saskatchewan, 356 species of spiders in 2 I families have been collected. The 10 families with the most species were Linyphiidae (30%), Gnaphosidae (13%), Salticidae (8%), Theridiidae ...