scholarly journals No additive genetic variance for tolerance to ethynylestradiol exposure in natural populations of brown trout ( Salmo trutta )

2019 ◽  
Vol 12 (5) ◽  
pp. 940-950 ◽  
Author(s):  
Lucas Marques da Cunha ◽  
Anshu Uppal ◽  
Emily Seddon ◽  
David Nusbaumer ◽  
Etienne L.M. Vermeirssen ◽  
...  
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
Genetic Variance ◽  
Additive Genetic Variance ◽  
Natural Populations ◽  
Brown Trout Salmo Trutta

scholarly journals Demographic Genetics of Brown Trout (Salmo trutta) and Estimation of Effective Population Size From Temporal Change of Allele Frequencies

Genetics ◽  
1996 ◽  
Vol 143 (3) ◽  
pp. 1369-1381 ◽  
Author(s):  
Per Erik Jorde ◽  
Nils Ryman
Keyword(s):  
Allele Frequency ◽  
Brown Trout ◽  
Salmo Trutta ◽  
Natural Populations ◽  
Effective Size ◽  
Effective Population ◽  
Frequency Shifts ◽  
Brown Trout Salmo Trutta ◽  
Population Sizes ◽  
Allozyme Loci

Abstract We studied temporal allele frequency shifts over 15 years and estimated the genetically effective size of four natural populations of brown trout (Salmo trutta L.) on the basis of the variation at 14 polymorphic allozyme loci. The allele frequency differences between consecutive cohorts were significant in all four populations. There were no indications of natural selection, and we conclude that random genetic drift is the most likely cause of temporal allele frequency shifts at the loci examined. Effective population sizes were estimated from observed allele frequency shifts among cohorts, taking into consideration the demographic characteristics of each population. The estimated effective sizes of the four populations range from 52 to 480 individuals, and we conclude that the effective size of natural brown trout populations may differ considerably among lakes that are similar in size and other apparent characteristics. In spite of their different effective sizes all four populations have similar levels of genetic variation (average heterozygosity) indicating that excessive loss of genetic variability has been retarded, most likely because of gene flow among neighboring populations.

Genetic Changes in Hatchery Stocks of Brown Trout (Salmo trutta)

1980 ◽  
Vol 37 (1) ◽  
pp. 82-87 ◽  
Author(s):  
Nils Ryman ◽  
Gunnar Ståhl
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
Natural Populations ◽  
Starch Gel Electrophoresis ◽  
Genetic Changes ◽  
Genetic Characteristics ◽  
Glycerophosphate Dehydrogenase ◽  
Field Samples ◽  
Brown Trout Salmo Trutta ◽  
Frequency Changes

Preservation of the genetic characteristics of a population is one of the primary objectives of many fish stocking programs. Using starch gel electrophoresis we have tested for temporal gene frequency stability at two polymorphic loci coding for α-glycerophosphate dehydrogenase and creatine phosphokinase. Three Swedish hatchery stocks of brown trout (Salmo trutta) and field samples from natural populations corresponding to two of these stocks were analyzed. Highly significant allele frequency changes at both loci indicated considerable lack of intra-stock genetic homogeneity. In the light of these findings we emphasize the importance of using large numbers of actual as well as effective parents to avoid inadvertent genetic changes and inbreeding. No stock should be founded or perpetuated using less than approximately 30 parents of the least numerous sex in any generation.Key words: inbreeding, genetic drift, gene bank, electrophoresis, stocking, trout

Resistance of erythrocytes from Brown trout (Salmo trutta m. trutta L.) affected by ulcerative dermal necrosis syndrome

2011 ◽  
Vol 14 (3) ◽  
pp. 443-448 ◽  
Author(s):  
N. Kurhalyuk ◽  
H. Tkachenko ◽  
K. Pałczyńska
Keyword(s):  
Oxidative Stress ◽  
Lipid Peroxidation ◽  
Brown Trout ◽  
Salmo Trutta ◽  
Thiobarbituric Acid ◽  
Control Group ◽  
Thiobarbituric Acid Reactive Substance ◽  
Tbars Level ◽  
Reactive Substance ◽  
Brown Trout Salmo Trutta

Resistance of erythrocytes from Brown trout (Salmo trutta m. trutta L.) affected by ulcerative dermal necrosis syndrome In the present work we evaluated the effect of ulcerative dermal necrosis (UDN) syndrome on resistance of erythrocytes to haemolytic agents and lipid peroxidation level in the blood from brown trout (Salmo trutta m. trutta L.). Results showed that lipid peroxidation increased in erythrocytes, as evidenced by high thiobarbituric acid reactive substance (TBARS) levels. Compared to control group, the resistance of erythrocytes to haemolytic agents was significantly lower in UDN-positive fish. Besides, UDN increased the percent of hemolysated erythrocytes subjected to the hydrochloric acid, urea and hydrogen peroxide. Results showed that UDN led to an oxidative stress in erythrocytes able to induce enhanced lipid peroxidation level, as suggested by TBARS level and decrease of erythrocytes resistance to haemolytic agents.

Evaluation of brown trout (Salmo trutta fario) fillets’ shelf life: Fed with a humic supplemented diet

2021 ◽  
Vol 29 ◽  
pp. 100675
Author(s):  
Muhammed Atamanalp ◽  
Arzu Ucar ◽  
Esat Mahmut Kocaman ◽  
Gonca Alak
Keyword(s):  
Shelf Life ◽  
Brown Trout ◽  
Salmo Trutta ◽  
Brown Trout Salmo Trutta ◽  
Salmo Trutta Fario
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