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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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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...
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Ten Standard Poodles were evaluated for progressive symmetrical scaling and alopecic dermatosis. The skin disease occurred in young adult Standard Poodles, either black or apricot, and was characterized by progressive symmetrical non-pruritic scaling with associated partial alopecia which began on t...
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Comamonas sp. strain JS765 can grow with nitrobenzene as the sole source of carbon, nitrogen, and energy. We report here the sequence of the genes encoding nitrobenzene dioxygenase (NBDO), which catalyzes the first step in the degradation of nitrobenzene by strain JS765. The components of NBDO were ...
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Sampling of the demersal fishes in part of the Madeleine Plateau (4T) was carried out between 21st and 27th Aug 1974. The best mean catch of cod was made in the west. There was a correlation between the regions of best yields and those where the bottom temp was between 1 {degree} and 4 {degree}C. Fe...
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In recirculation finfish facilities in the United States and Canada, biosecurity utilization is neither consistent nor uniform. Seeking reasons for this situation, we examined the beliefs, perceptions, and attitudes of managers and owners of such facilities about fish disease and biosecurity utiliza...
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Plasma pharmacokinetics and bioavailability of oxytetracycline were studied in Atlantic salmon (Salmo salar ) (weight 481.8 plus or minus 39.98 g, mean plus or minus 1 SD) held in reconstituted seawater at 15 degree C. Fish received a single dose of oxytetracycline (OTC) at a dose rate of 100 mg/kg ...
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This paper provides the first empirical characterization of biosecurity utilization in finfish aquaculture. In fall 2001, a questionnaire survey was mailed to managers of finfish-rearing recirculation facilities in the United States and Canada to obtain baseline data on the frequency of use of 11 di...
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Early lesions in these cultures (3-10 hours after virus inoculation) consisted of nucleolar sweating and disruption; there was loss of RNA from the nucleo-lus and segregation of nueleolar components (demonstrated by electron microscopy). During the middle phase (10-34 hours) three types of eosinophi...
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Selected tissues from 13 germ-free and three specific pathogen-free cats with experimental feline infectious enteritis were examined by electron microscopy. Intestinal lesions, consisting of dilatation of intercellular spaces and of endoplasmic reticular cisternae, occurred only in SPF cats. No lesi...
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A 13-yr-old gelding which had received a severe kick on the eye 1 yr previously developed a rapidly growing retrobulbar swelling causing severe exophthalamos of the left eye. Antibiotic and steroid therapy were ineffective and the animal was killed. At post-mortem the retrobulbar fossa was found fil...
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This article sets out some of the steps necessary to achieve optimum processing results in dairy operations. They include the collection and analysis of basic data (growth trends, labour factors, equipment, funds), drawing up of schematic layouts and final design of premises..
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Routine haematoxylin-eosin stained paraffin sections, were processed for electron microscopy, using a rapid method for localization of animal viruses. Formalin fixation was effective in preserving DNA as well as RNA viruses, however cellular fine structural details and organelles were not well prese...
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In the autumn of 2001, a survey was conducted to examine basic farm production and human resource characteristics of recirculation facilities in the United States and Canada currently growing finfish. An 86% response rate was achieved. The survey data indicate that this sector of aquaculture is quit...
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Clinical signs and histopathologic and ultrastructural features were consistent with those reported in globoid cell leukodystrophy in man, cat, and other breeds of dogs. The occurrence of the disorder in two clinically affected females from a related litter and a familial history of inbreeding suppo...