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Blue mussel Mytilus edulis aquaculture lines and associated gear provide habitat for sessile and mobile epifaunal fouling organisms. Due to food limitations and substrate space, these species are likely to interact among themselves and with mussels. In some areas of Prince Edward Island and elsewher...
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Rana pipiens and R. clamitans were evaluated during 1993-94 at 8 wetland sites in Ontario, Canada, 4 of which were within apple orchards, to determine if environmental changes associated with orchard management affected measured biological parameters. Size, age, genetic variation, condition indices,...
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The upland hardwood component of Prince Edward Island's Acadian forest is among the best remaining examples of the precolonial landscape, but it has been severely fragmented during the past 300 years of human use and settlement. Despite the ecological importance of this remnant habitat and its level...
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Oncostatin M (OSM) is a growth and differentiation factor which has been shown to exert both stimulatory and inhibitory effects on tissue invasion in various cell lines. Tissue invasion is a key marker of metastases and can be monitored by examining activities associated with ECM degradation such as...
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Small mammal communities were studied in eight vegetation types of the Prince Edward Island National Park. Ten species were trapped. Shannon-Weiner index of diversity was high in Red Pine[Pinus resinosa] plantations (1.33 and 1.55) and a bog (1.47), and low for opened habitats such as a dune (0.19),...
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In the present study, the expression and the regulation of ornithine decarboxylase (ODC) and S-adenosylmethionine decarboxylase (SAMDC) was examined in a series of oncogene transformed cell lines. The expression of both ODC and SAMDC was found to correlate with the nature of the oncogene expressed a...
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We compared a range of anatomical features of northern leopard frogs (Rana pipiens Schreber) collected from areas where deformity rates were low (-2% in nonstressed regions) and high (-40% in the stressed region) to determine if one or more of these characters might be useful in detecting developmen...
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We compared the nucleosomal organization, histone H1 subtypes, and histone H1 phosphorylated isoforms of ras-transformed and parental 10T1/2 mouse fibroblasts. In agreement with previous studies, we found that ras-transformed mouse fibroblasts have a less condensed chromatin structure than normal fi...
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Natural 'bioactive' factors have the ability to attenuate atherogenesis in in vitro and in vivo models. The effects of cranberry on the expression of two inflammation-linked enzymes, cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS), were examined in aortic smooth muscle ...
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The preceding review indicates that there is convincing evidence for the presence of adenosine in and release of adenosine from capsaicin-sensitive small diameter primary afferent neurons in the spinal cord (Fig. 1). Within the dorsal spinal cord, adenosine inhibits the transmission of nociceptive i...
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In Philodendron, pistillate flowers are initiated on the proximal portion of the inflorescence and staminate flowers are initiated on the distal portion. Between the staminate and pistillate flowers, there is a transition zone consisting of sterile male flowers adjacent to the male zone and a row of...
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Background and Aims The inflorescence of Philodendron constitutes an interesting morphological model to analyse the phenomenon of homeosis quantitatively at the floral level. The specific goals of this study were (1) to characterize and quantify the range of homeotic transformation in Philodendron ...
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The relationship between S. purpurea and its inquilines in northeastern North America is reviewed. Wyeomyia smithii, Metriocnemus knabi and Blaesoxipha fletcheri dominate the insect community of S. purpurea. All 3 are detritivores and feed on the arthropod prey attracted to the pitcher plant. They c...
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Isocitrate lyase and malate synthetase, key enzymes of the glyoxylate cycle, were present in postparasites of R. culicivorax. Specific activities of enzymes were higher in adult postparasites than in newly emerged juveniles. Isocitrate lyase had a well-defined pH optimum (7.5), whereas malate synthe...
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Aim The aim of this study was to investigate the effects of climate, geography, census area and the distribution of body mass on the mass : density relationship in terrestrial mammal populations. Location The areas covered include most major terrestrial biomes including the tropics, savannas, and te...
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The relative importance of predatory decapod crustaceans in sedimentary communities depends on the spatial variability in their abundance and composition. At the scale of a fjord, such spatial patterns could be related to sill-mediated larval supply. This study examines larval and adult distribution...