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Sea lice (Lepeophtheirus salmonis ), ectoparasites of salmonids, are creating concern within the aquaculture industry of Canada. The prophylactic agent of choice to treat for these parasites is dichlorvos. Larval, juvenile, and adult lobsters (Homarus americanus ), species of zooplankton, species of...
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Long-term elution tailing of organic contaminants, often observed when water or air is used to flush contaminated porous media, has been attributed to several factors. Characterization of this tailing behaviour through the quantitative analysis of multiple coupled factors is necessary to enhance our...
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Examination over a period of 72 hours from inoculation showed that lesions developed first in astrocytes. where nucleolar changes. the appearance of three types of inclusion bodies, virus antigen and virus particles preceded cell degeneration and virus release. Less numerous inclusions were found in...
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A report of the first elver that have been captured in the St. Lawrence Gulf, away from the river mouth, is presented. The 2 elvers were caught on 12 May 1978. They measured 53 and 36 mm respectively, and as no dorsal or mediolateral pigmentation was present it was affirmed that they had not yet rea...
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A collection of lymnaeid snails in Montana, USA, was made over a 3 year period, in conjunction with a state-wide survey of the distribution of liver flukes. Collection areas were selected based on reports of infected cattle, sheep or wildlife, and with the intent of covering all geographical regions...
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In the autumn of 2001, a self-administered mailed questionnaire was sent to fin fish recirculation facilities in the United States and Canada to examine the extent of biosecurity currently practiced in this sector of aquaculture. This paper describes the results of this survey (86% response rate). I...
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Observations were carried out on the catches of 2 fixed fishing gears in the upper estuary of the St-Lawrence during the 1974 season (June-Oct) as part of a programme for improving fixed fishing gears. The total catch of the experimental fishery was 18,034 (36 spp) and of the control, 5,367 (35 spp)...
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Two unrelated cases of urticaria pigmentosa-like disease in the dog, characterized by multiple non-pigmented nodules and erythemic bullae of sporadic appearance and duration, were reviewed. Both dogs first showed signs at approximately 6 months of age, and there was no evidence of systemic involveme...
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Serological examination of 533 Mephitis mephitis between December 1974 and July 1977 showed that the prevalence of serotype pomona was 11.4% and that it was higher in southern Alberta and adjacent areas of Saskatchewan than previously reported. Prevalence of antibodies among 94 skunk near an infecte...