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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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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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Glutamic acid (GA) and kainic acid (KA) are structurally related to domoic acid (DOM), a neurotoxic amino acid that caused human food poisoning in 1987, following consumption of toxic mussels (Mytilus edulis ) from Prince Edward Island, Canada. To study the difference in response of mussels to a phy...
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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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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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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 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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Flow-cytometric characterisation of bivalve haemocytes is usually performed by light-scatter profiles based on size and complexity of the cells. Additional means of characterisation such as specific fluorescent dyes are not commonly used to discriminate cell subpopulations in challenged and unchalle...
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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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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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We have studied the replication of virus in tissues and development of lesions associated with infectious salmon anemia virus (ISAV) infection in Atlantic salmon using in situ hybridization (ISH) with a riboprobe targeting ISAV RNA segment 7 messenger RNA. Fish were infected with three ISAV isolates...
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Four hundred eighty mature marine mussels (Mytilus edulis) were collected in late April from a mussel lease in an estuary in Prince Edward Island, Canada. Squash preparations made of reproductive gland (mantle) tissue of each mussel were stained with Wright-Giemsa stain and were examined by one inve...
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Industrial depuration may provide a means of removing domoic acid toxin from blue mussels (Mytilus edulis ). Mussels containing up to 50 mu g domoic acid/g were transported from a Prince Edward Island estuary into controlled laboratory conditions to test the effects of temperature, salinity, mussel ...
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Visceral and systemic infection with a Dermocystidium -like organism was diagnosed recently in post-seawater entry smolts of Atlantic salmon farmed in the Bay of Fundy. In late summer and early fall, young fish developed "black smolt" disease, characterized by anorexia, lethargy and black skin. Para...
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Immune function gene expression in Mya arenaria haemocytes was evaluated following in vivo infection with Vibrio splendidus LGP32-GFP and 7SHRW. Elongation factor 1alpha (EF-1alpha) with 2 (EF-2), after challenge with LGP32-GFP, and EF-1alpha with the ribosomal protein S-18, after challenge with 7SH...
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Immune function gene expression in Mya arenaria haemocytes was evaluated following in vivo infection with Vibrio splendidus LGP32-GFP and 7SHRW. Elongation factor 1α (EF-1α) with 2 (EF-2), after challenge with LGP32-GFP, and EF-1α with the ribosomal protein S-18, after challenge with 7SHRW, were ...
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Host-pathogen interaction models in aquatic species are useful tools for understanding the pathogenicity of diseases in cultured and wild populations. In this study we report the differential in vivo response of soft-shell clam (Mya arenaria) hemocytes against two strains of Vibrio splendidus. Respo...
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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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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,...
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In contrast to mammalian therapeutics, the use of pharmaceutical substances is rather limited in fish. It is basically restricted to anaesthetic agents and anti-infective agents for parasitic and microbial diseases. Anaesthetic agents are used primarily in fish farm and laboratory settings to provid...
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Chloramine-T is a commonly used therapeutic agent for the treatment of bacterial gill disease and related phenomena in the salmonid aquaculture industry. There is little known about its effects on healthy fish. Using a 24-tank replicate growth assay system, rainbow trout (Oncorhynchus mykiss) (avera...