scholarly journals Effects of genetic origin on phenotypic divergence in Brook Trout populations stocked with domestic fish

Ecosphere ◽  
2020 ◽  
Vol 11 (5) ◽  
Author(s):  
Philippine Gossieaux ◽  
Émilie Lavoie ◽  
Pascal Sirois ◽  
Isabel Thibault ◽  
Louis Bernatchez ◽  
...  
Keyword(s):  
Brook Trout ◽  
Genetic Origin ◽  
Phenotypic Divergence

Evolution de la variabilité génétique inter et intra-populations de populations de Salmonidés issues de mêmes pools géniques

1984 ◽  
Vol 41 (7) ◽  
pp. 1024-1029 ◽  
Author(s):  
R. Guyomard ◽  
C. Grévisse ◽  
F. X. Oury ◽  
P. Davaine
Keyword(s):  
Brook Trout ◽  
Salmo Trutta ◽  
Salvelinus Fontinalis ◽  
Electrophoretic Analysis ◽  
Behavioral Variability ◽  
Genetic Origin ◽  
Enzymatic Systems ◽  
Electrophoretic Data ◽  
Brown Trout Salmo Trutta ◽  
Genetic Pool

Through electrophoretic analysis of 14 enzymatic systems corresponding to 31 loci, we studied the change over six generations in the intra- and inter-population variability of salmonid populations from the same initial genetic pool. Four collections of brook trout (Salvelinus fontinalis) and five of brown trout (Salmo trutta) from recently acclimatized stocks in the Kerguelen Islands were examined. The heterozygosity level of these populations remained high and corresponded to the levels of variability observed in other polymorphism studies of the same species. In each species, there was a consistent pattern of genetic differentiation with the "hydrographic proximity" of the populations and with the genetic origin. Within one and the same initial genetic pool, the dendrograms grouped primarily the different ecotypes collected in the same hydrographic system. Thus, these ecotypes seem to result from a behavioral variability within a panmictic population. Finally, establishment of time–genetic distance relationships on the sole basis of electrophoretic data appears unwarranted.

Organochlorine Residues in Brook Trout and Yellow Perch From New Brunswick and Nova Scotia (Canada) Lakes

1987 ◽  
Vol 22 (3) ◽  
pp. 352-364
Author(s):  
R. Peterson ◽  
S. Ray
Keyword(s):  
Nova Scotia ◽  
New Brunswick ◽  
Brook Trout ◽  
Yellow Perch ◽  
Intensive Agriculture ◽  
Fish Tissues ◽  
North Central ◽  
Ddt Metabolites ◽  
Headwater Lakes

Abstract Brook trout and yellow perch collected while surveying New Brunswick and Nova Scotia headwater lakes were analyzed for DDT metabolites, chlordane, hexacyclohexane isomers, hexachlorobenzene, toxaphene and PCB’s. Concentrations of DDT metabolites were much higher from fish taken from lakes in north-central N.B. (200-700 ng/g wet wt) than from fish taken elsewhere (<10 ng/g). Seventy to 90% of the DDT metabolites was DDE. Chlordane (3-13 ng/g) was analyzed in seven trout, six of them from central N.B. areas with intensive agriculture. Isomers of hexachlorocyclohexane were in highest concentration from north-central N.B. (10-20 ng/g), eastern N.S. (5-15 ng/g) and southern N.B. (5-20 ng/g). In most cases, alpha-hexachlorocyclohexane (lindane) was the isomer in highest concentration. Concentrations of hexachlorobenzene in fish tissues was highly variable with no obvious geographic bias. PCB’s were detected in very few fish, and no toxaphene was detected.

Curative Ayurvedic approach to Ulcerative colitis - A Case Report

2016 ◽  
Vol 1 (2) ◽  
Author(s):  
Dr. Sumedh Wasnik ◽  
Anita Ghodke ◽  
Vaibhav Sulakhe
Keyword(s):  
Ulcerative Colitis ◽  
Weight Loss ◽  
Immune Suppression ◽  
Inflammatory Bowel Diseases ◽  
Life Style ◽  
Intravenous Fluids ◽  
Genetic Origin ◽  
Bowel Diseases ◽  
Inflammatory Bowel ◽  
Difficult Issue

Westernization and today’s changing life style is resulting in various health problems like Inflammatory Bowel diseases, which is a common entity encountered in surgical practise. Ulcerative colitis is the most common among them. Though it is believed to have auto immune and genetic origin, today’s life style, environment, diet and stress plays an important role in aetiology. The disease is prevalent in middle aged western and northern people characterised by abdominal pain with bloody diarrhoea, weight loss, anaemia and general debility. This condition has remissions and exacerbations. One should always keep in mind that inflammatory bowel diseases can have anorectal manifestations. Diagnosis is made on the basis of symptoms, stool exam. and endoscopy. Management is symptomatic i.e. antibiotics, anti-inflammatory, anti-spasmodic, multivitamins, immune suppression and if required admission, intravenous fluids. if no response colectomy. As such there is no satisfactory treatment till date, so it remains the difficult issue. Here we need to have an alternative, safe, convenient treatment. Ayurveda has an answer for such cases.

scholarly journals Evidence for the Use of Mucus Swabs to Detect Renibacterium salmoninarum in Brook Trout

Pathogens ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 460
Author(s):  
Tawni B. Riepe ◽  
Victoria Vincent ◽  
Vicki Milano ◽  
Eric R. Fetherman ◽  
Dana L. Winkelman
Keyword(s):  
Brook Trout ◽  
Sampling Methods ◽  
Kidney Tissue ◽  
Detection Methods ◽  
Fish Health ◽  
Wild Populations ◽  
Renibacterium Salmoninarum ◽  
Tissue Samples ◽  
Future Studies ◽  
Aquaculture Facilities

Efforts to advance fish health diagnostics have been highlighted in many studies to improve the detection of pathogens in aquaculture facilities and wild fish populations. Typically, the detection of a pathogen has required sacrificing fish; however, many hatcheries have valuable and sometimes irreplaceable broodstocks, and lethal sampling is undesirable. Therefore, the development of non-lethal detection methods is a high priority. The goal of our study was to compare non-lethal sampling methods with standardized lethal kidney tissue sampling that is used to detect Renibacterium salmoninarum infections in salmonids. We collected anal, buccal, and mucus swabs (non-lethal qPCR) and kidney tissue samples (lethal DFAT) from 72 adult brook trout (Salvelinus fontinalis) reared at the Colorado Parks and Wildlife Pitkin Brood Unit and tested each sample to assess R. salmoninarum infections. Standard kidney tissue detected R. salmoninarum 1.59 times more often than mucus swabs, compared to 10.43 and 13.16 times more often than buccal or anal swabs, respectively, indicating mucus swabs were the most effective and may be a useful non-lethal method. Our study highlights the potential of non-lethal mucus swabs to sample for R. salmoninarum and suggests future studies are needed to refine this technique for use in aquaculture facilities and wild populations of inland salmonids.

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