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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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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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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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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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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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'Winter ulcer disease' is a problem in seawater salmonid aquaculture in Norway, Iceland and Scotland. The disease is associated with low water temperatures (<6-8 degree C) and is characterized by shallow ulcers on scale covered tissue that may progressively deepen and penetrate muscular layers. M...
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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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A modified technique for accelerating the growth of atypical Aeromonas salmonicida, the causative agent of furunculosis disease in salmonids, is described. The method was modified from the technique first described by Evelyn et al. (1989) in which a 'nurse' culture of Renibacterium salmoninarum was ...
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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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Antimicrobial drug resistance patterns of atypical isolates of Aeromonas salmonicida from Atlantic salmon Salmo salar, or rainbow trout Oncorhynchus mykiss, from sites in Newfoundland were determined by disk diffusion assay. There was no resistance against chloramphenicol, kanamycin, nalidixic acid,...