Canadian Journal of Zoology
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Tissue-specific allometry of an aerobic respiratory enzyme in a large and a small species of cyprinid (Teleostei) The aerobic enzyme cytochrome-c oxidase (CCO) was used as a measure of tissue-specific metabolic capacity. Changes in tissue CCO activity with increased body size were combined with allometric relationships for tissue weight to describe changes in energy use with increased body size. A large (common carp, Cyprinus carpio) and a small (common shiner, Notropis cornutus) species of cyprinid ... ...
Canadian Journal of Zoology - Tập 66 Số 10 - Trang 2199-2208 - 1988
RESPIRATION OF FISHES WITH SPECIAL EMPHASIS ON STANDARD OXYGEN CONSUMPTION: II. INFLUENCE OF WEIGHT AND TEMPERATURE ON RESPIRATION OF SEVERAL SPECIES Standard oxygen consumption, as estimated by simultaneously measuring spontaneous activity and oxygen consumption, for five species of freshwater fishes, was measured in relation to weight and temperature. The fish studied were brown trout, Sulmo trutta; brook trout, Salvelinus fontinalis; common white sucker, Catostomus commersonii; brown bullhead, Ictalurus nebulosus; and carp, Cyprinus... ...
Canadian Journal of Zoology - Tập 42 Số 2 - Trang 177-188 - 1964
Tissue specific isozymes of alanopine dehydrogenase in the channeled whelk Busycotypus canaliculatum The tissues of the channeled whelk Busycotypus canaliculatum displayed activities of three glycolytic dehydrogenases, alanopine dehydrogenase (ADH), octopine dehydrogenase (ODH), and lactate dehydrogenase (LDH). ADH and ODH were present in all seven tissues (hepatopancreas, gill, kidney, and mantle, ventricle, foot, and proboscis muscles) tested. ADH was the major cytosolic dehydrogenase ... ...
Canadian Journal of Zoology - Tập 60 Số 7 - Trang 1568-1572 - 1982
HYDROMERMIS CHURCHILLENSIS N. SP. (NEMATODA: MERMITHIDAE) A PARASITE OF AEDES COMMUNIS (DeG.) FROM CHURCHILL, MANITOBA, WITH OBSERVATIONS OF ITS INCIDENCE AND BIONOMICS Hydromermis churchillensis n. sp. is described. It is distinguished from other species of Hydromermis mainly by the fused spicules and pointed termini of both sexes. One to six larval nematodes may be found in a larva of Aedes communis (DeG.). They emerge to become free-living, molt, mature, mate, and oviposit in 2 months. Host activity is hindered, pupation prevented, and the host usuall... ...
Canadian Journal of Zoology - Tập 38 Số 3 - Trang 465-474 - 1960
Evidence for a memory process in the turning behavior of free swimming goldfish Positive correlation was established between the magnitudes of consecutive turns in opposite directions of naive goldfish in a monitor tank. Evidence is presented for a decrease in this correlation with increasing time between turns; no change in correlation could be established with distance between turns. Results are discussed with reference to the literature on spontaneous alternation ... ...
Canadian Journal of Zoology - Tập 48 Số 4 - Trang 813-815 - 1970
Seasonal changes in thyroid hormones and osmoregulation in mature male parr and 1- and 2-year-old immature parr of Baltic salmon (Salmo salar L.) One-year-old Atlantic salmon improved their seawater adaptability in late spring, at a time when 2-year-old fish smoltify, though not to the same degree as the latter. One-year-old males that matured precociously were less able to adapt to seawater than immature fish. Both 1- and 2-year-old immature salmon increased their plasma levels of thyroxine when entering the smolt stage; however, ... ...
Canadian Journal of Zoology - Tập 67 Số 4 - Trang 942-947 - 1989
Caractéristiques écologiques et épidémiologiques de l'Echinococcus multilocularis au cours d'un cycle complet des populations d'un hôte intermédiaire (Microtus arvalis) This study, carried out in a medium altitude mountain ecosystem (Doubs, France), was devoted to the analysis of spatial and temporal variations of the infestation rate of Echinococcus multilocularis Leuckart in a microtine secondary host (Microtus arvalis Pallas) during a complete population cycle of the rodent. This analysis, combined with a structural study of the landscape, showed that... ...
Canadian Journal of Zoology - Tập 66 Số 12 - Trang 2740-2750 - 1988
Éléments pour la cartographie écologique de l'échinococcose alvéolaire dans le Massif central (France): essai de délimitation d'un foyer A centre of alveolar disease caused by Echinococcus multilocularis has recently been discovered in the Department of Cantal, France; we have attempted to define the limits of the centre of infection and to determine the main risk zones of propagation of the disease. The red fox, Vulpes vulpes (L.), served as a marker of the parasite. Ecological factors (floristic, climatological, and lith... ...
Canadian Journal of Zoology - Tập 66 Số 3 - Trang 696-702 - 1988
Effects of castration on open-field behaviour and aggression in male meadow voles (Microtus pennsylvanicus) A series of three experiments tested the hypothesis that castration would result in altered open-field behaviour and aggression in male meadow voles. The open-field behaviour of laboratory-reared voles was not affected, and that of wild-captured laboratory-housed animals showed only one significant difference. However, in free-ranging voles, recaptured at intervals for testing, castration... ...
Canadian Journal of Zoology - Tập 58 Số 10 - Trang 1927-1932 - 1980
Response of stream benthos and drift to fine sediment deposition versus transport Field experiments were conducted to investigate the responses of benthic macroinvertebrate communities to experimental additions of fine sediments into riffles having a flow with either low tractive force so the sediments were deposited or sufficient tractive force to transport the added sediments. Sediment deposition had no measurable impact on most taxa, the only negative effects being ... ...
Canadian Journal of Zoology - Tập 64 Số 6 - Trang 1345-1351 - 1986
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