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...

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...

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 ...

'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...

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...

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...

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...

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...

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...

Domoic acid is a neurotoxic amino acid responsible for an outbreak of human food poisoning in late 1987 following consumption of contaminated blue mussels (Mytilus edulis L.) from eastern Prince Edward Island, Canada. In vitro techniques were used to examine the uptake of domoic acid by digestive gl...

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...

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...

A lectin that agglutinates rabbit red blood cells (RBCs) and human type B RBCs was isolated from ova of rainbow trout Oncorhynchus mykiss . Partial purification of this hemagglutinating material was achieved by affinity chromatography of an H sub(2)O-dialyzed yolk homogenate on rhamnose-linked Sepha...

During a longitudinal survey from June until October 1987 cytological blood parameters of smoltified marine cultured rainbow trout, Oncorhynchus mykiss (Walbaum), were monitored. In this period, the trout were exposed to environmental stress resulting in summer mortality. The statistical analyses sh...

Granulomatous skin lesions were identified in a population of yellow perch (Perca flavescens) from Sandy Lake (Alberta, Canada) in 1985. Severe granulomatous peritonitis and hepatitis was identified subsequently in a separate population of yellow perch from Wolf Lake (Alberta, Canada). Mycobacterium...

Chloramine-T has been commonly used as a therapeutic agent for the treatment of bacterial gill disease and related phenomena in the salmonid aquaculture industry, and it is now commonly used as a prophylactic agent to prevent diseases in commercial salmonid hatcheries. Rainbow trout Oncorhynchus myk...

Domoic acid is a neurotoxic amino acid responsible for an outbreak of human food poisoning in late 1987 following consumption of contaminated blue mussels (Mytilus edulis L.) from eastern Prince Edward Island, Canada. In vitro techniques were used to examine the uptake of domoic acid by digestive gl...

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 ...