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...

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...

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...

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...

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...

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...

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 ...

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 ...

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..

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,...

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...

Neurologic disease resulting from infection with Parelaphostrongylus tenuis was diagnosed in a fallow deer (Dama dama) from Georgia, USA, with clinical signs and histopathologic lesions similar to those reported for other accidental hosts of P. tenuis. Early 5th-stage parasites were found in the spi...

This report describes a new syndrome affecting farmed Atlantic salmon on the Canadian east coast that has resulted in increased morbidity and mortality in affected stocks. The major pathological findings are apparent only microscopically and include renal interstitial haemorrhage and acute tubular n...

Drugs used in aquaculture cover a wide range of chemotherapeutic compounds including basic chemicals, hormones, antibacterials and pesticides. The decision to treat an aquaculture product is complicated by the lack of pharmacokinetic data available on fish. Methods of drug administration, routes of ...

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...

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)...

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...

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...

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 ...