Long-term and seasonal genetic differentiation in wild and enhanced stocks of sea trout (Salmo trutta m. trutta L.) from the Vistula River, in the southern Baltic—Management implications

2016 ◽  
Vol 175 ◽  
pp. 57-65 ◽  
Author(s):  
Anna Wąs ◽  
Rafał Bernaś
Keyword(s):  
Genetic Differentiation ◽  
Salmo Trutta ◽  
Management Implications ◽  
Sea Trout ◽  
Vistula River ◽  
Southern Baltic

scholarly journals Climate Change Impact on Salmon (Salmo salar) and Sea Trout (Salmo trutta) in the Salaca River, Latvia

2020 ◽  
pp. 17-26
Author(s):  
Janis Birzaks
Keyword(s):  
Atlantic Salmon ◽  
Water Temperature ◽  
Salmo Salar ◽  
Salmo Trutta ◽  
Age Groups ◽  
Average Water Temperature ◽  
Sea Trout ◽  
The One ◽  
The Baltic

Hydrometeorological conditions are important determinants of the distribution, abundance and growth of Atlantic salmon (Salmo salar) and sea trout (Salmo trutta) parr and smolt in rivers. Long-term monitoring of the temperate zone Salaca River was conducted to investigate long-term changes in water temperature and streamflow and their effects on juvenile Atlantic salmon and sea trout. The average water temperature in the Salaca River was found to increase over time, particularly in autumn, winter and spring. River discharge increased in winter and summer, which was caused by increased precipitation. Goals of our study were: 1) to examine trends in water temperature and discharge in the river, 2) to explore relations between hydrometeorological trends, on the one hand, and abundance, size at age of salmon and sea trout parr and smolt, as well as changes in smolt migration patterns, on the other. This was the first occasion that a study of this type had been carried out in the Baltic Sea basin. In summer, growth of salmon parr in all age groups in the Salaca River was reduced. However, the size of smolt was found to increase. Migration of sea trout smolt in the Salaca River took place earlier, and the end of both salmon and sea trout migration was also observed earlier. The age structure of salmon smolt changed, with the one-year- old age group dominating. Judging from the total numbers of salmon and sea trout smolt in the River Salaca, production of smolt in the river during the monitoring period increased.

Genotyping of two populations of Southern Baltic Sea trout Salmo trutta m. trutta using an Atlantic salmon derived SNP-array

2013 ◽  
Vol 9 ◽  
pp. 25-32 ◽  
Author(s):  
Agata Drywa ◽  
Anita Poćwierz-Kotus ◽  
Anna Wąs ◽  
Stefan Dobosz ◽  
Matthew P. Kent ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Baltic Sea ◽  
Salmo Trutta ◽  
Snp Array ◽  
Southern Baltic Sea ◽  
Sea Trout ◽  
Southern Baltic ◽  
Two Populations

scholarly journals Characteristics of sea trout spawners (Salmo trutta) in the Vistula River mouth in reference to the previous Vistula River stocks

2020 ◽  
Vol 28 (3) ◽  
pp. 166-174
Author(s):  
Paweł Buras
Keyword(s):  
Age Structure ◽  
Salmo Trutta ◽  
Length Distribution ◽  
River Mouth ◽  
Spawning Grounds ◽  
Sea Trout ◽  
Vistula River ◽  
Management Interventions

AbstractThe age structure and length distribution of sea trout spawners caught in the Vistula River mouth in the 1984–1986 period were analyzed in reference to previous Vistula stocks of summer spawning and winter spawning runs, and also to silvering sea trout. The comparison took into consideration two variants: the period when the sea trout summer spawning and winter spawning runs ascended the Vistula and when they gathered at spawning grounds. Statistically significant differences were confirmed in the age structure and length distribution of sea tout spawners caught in the Vistula River mouth in the 1980s and the previous Vistula stocks. The reason for these difference must be sought in management interventions and especially in the permanent cycle of smolt production, sea trout spawner selection when they ascended the Vistula, catches made for artificial spawning, and the periodic stocking of sea trout with material originating from Pomeranian rivers.

scholarly journals The largest Baltic population of sea trout (Salmo trutta L.): its decline, restoration attempts, and current status

2018 ◽  
Vol 26 (2) ◽  
pp. 81-100 ◽  
Author(s):  
Piotr Dębowski
Keyword(s):  
River Basin ◽  
Salmo Trutta ◽  
Current Status ◽  
Late Nineteenth Century ◽  
Sea Trout ◽  
Vistula River ◽  
Current State ◽  
Baltic Population ◽  
Mature Fish ◽  
The Baltic

Abstract The sea trout, Salmo trutta L. population in the Vistula River was the largest in the Baltic Sea. Its primary spawning grounds were located in the Carpathian tributaries in the upper river basin. The fish ascended to spawn in two runs: in winter when the fish were immature and spent nearly a whole year in the river, and in summer when mature fish ascended the river and spawned within a few months. This work presents the fisheries and stocking history and scientific studies of this population from the late nineteenth century. The consequences of the most important changes in the sea trout habitat are tracked from construction in the upper river basin in the 1940s and the damming of the river in its middle reaches in Włocławek in 1969. Despite intense stocking that has been conducted for over one hundred years, catches have declined from over 100 tons to nearly zero in recent years. The current state of the population and the possibilities of restoring it are discussed in light of genetic studies.

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