Beaufort trout MicroPlex: a high-throughput multiplex platform comprising 38 informative microsatellite loci for use in resident and anadromous (sea trout) brown trout Salmo trutta genetic studies

2013 ◽  
Vol 82 (6) ◽  
pp. 1789-1804 ◽  
Author(s):  
K. Keenan ◽  
C. R. Bradley ◽  
J. J. Magee ◽  
R. A. Hynes ◽  
R. J. Kennedy ◽  
...  
Keyword(s):  
High Throughput ◽  
Brown Trout ◽  
Microsatellite Loci ◽  
Salmo Trutta ◽  
Genetic Studies ◽  
Sea Trout ◽  
Brown Trout Salmo Trutta

scholarly journals Saltwater spawning grounds of sea-run brown trout (Salmo trutta) in tidal waters of a major Norwegian river

2021 ◽  
Author(s):  
Sven-Erik Gabrielsen ◽  
Robert J. Lennox ◽  
Tore Wiers ◽  
Bjørn T. Barlaup
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
Pink Salmon ◽  
River Mouth ◽  
Competitive Balance ◽  
Spawning Grounds ◽  
Sea Trout ◽  
Spawning Areas ◽  
Brown Trout Salmo Trutta ◽  
Spawning Behaviour

AbstractSea-run brown trout (Salmo trutta) have a highly phenotypically plastic life history that allows them to be effective colonizers and competitors in freshwater. This paper documents a previously unknown spawning behaviour in a brackish, tidally influenced estuary 14 km from the mouth of the Vosso River, a major Atlantic salmon- and sea-run brown trout–producing river in western Norway. Putative spawning gravel was observed, and sea-run brown trout deposited eggs that hatched in April. Survival of recruits was high (> 95%) in the tidal spawning gravel. These areas are strongly tidally influenced with a peak of 23.17 psu recorded at the lowest spawning ground. The observation of spawning so far from the river mouth may be unique in such a system with a long estuary but provides important insight into the biology of sea trout. Invasion of pink salmon, also known to spawn in estuaries, may negatively affect the competitive balance of sea trout with other salmonids in rivers where sea trout populations rely on recruitment from these relatively extreme spawning areas. Restoration of estuaries that have been modified by dredging or channelization may be important to ensure quality and heterogenous habitat for sea trout spawning given that haline spawning grounds could contribute to population resilience.

scholarly journals A comparison of trends in population size and life history features of Atlantic salmon (Salmo salar) and anadromous and non-anadromous Brown trout (Salmo trutta) in a single catchment over 116 years

Hydrobiologia ◽  
2021 ◽  
Author(s):  
Colin E. Adams ◽  
Hannele M. Honkanen ◽  
Ellen Bryson ◽  
Isabel E. Moore ◽  
Malcolm MacCormick ◽  
...  
Keyword(s):  
Time Series ◽  
Atlantic Salmon ◽  
Brown Trout ◽  
Salmo Trutta ◽  
Relative Proportion ◽  
Population Trends ◽  
Sea Trout ◽  
Salmon Population ◽  
Brown Trout Salmo Trutta ◽  
Long Time

AbstractWe use a long time series of catch abundance from a recreational fishery over 116 years to look for population trends in Atlantic salmon, and anadromous (sea trout) and non-anadromous (brown) trout for a single catchment, Loch Lomond, west central Scotland. Year strongly predicted variation in catches but catch effort did not meaningfully increase explained variation. Salmon showed periods of increasing and decreasing trends, for sea trout and brown trout there was an overall declining trend. Since 1952, Lomond salmon population trends differed from both wider Scotland and southern Europe, indicating that the Lomond population is partially buffered from drivers of change in salmon populations more widely. In contrast Lomond sea trout showed a similar declining trend to that of populations from the wider west of Scotland over this period. The Lomond populations showed some evidence of shorter-term cycling patterns; the drivers for which are unknown. Body size in salmon and sea trout declined but increased in brown trout; salmon returned to freshwater later, and the relative proportion of all caught trout that were anadromous increased across the time series. This study shows a long and protracted period of fundamental change to populations of these two species over 116 years.

Ecological Significance of Differences in Frequency of White Fin Margins Among Four Brown Trout (Salmo trutta) Populations

1988 ◽  
Vol 45 (7) ◽  
pp. 1304-1309 ◽  
Author(s):  
Trend Taugbøl ◽  
Jostein Skurdal ◽  
Ragnvald Andersen
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
Selective Pressure ◽  
Territorial Behavior ◽  
Ecological Significance ◽  
Low Frequencies ◽  
Small Stream ◽  
Sea Trout ◽  
Open Sea ◽  
Brown Trout Salmo Trutta

The frequency of distinct white fin margins was investigated in four brown trout (Salmo trutta) populations, living in the small stream Austadbekken (anadromous and stream resident) and in Lake Selura (lake and stream spawners). The frequency varied within and among populations. White margins were most common among parr and mature residents from Austadbekken. Sea trout had very low frequencies compared with parr and mature residents from the same population. Among stream spawners from Lake Selura (which stay the first 0–2 yr in the stream), white margins were less frequent than in Austadbekken; lake spawners (which spend their entire life in the lake) had even fewer. While a previous author stated that white fin margins were under genetic control, our observations indicate that the environment can affect the coloration. We hypothesize that white fin margins play a role in territorial behavior and are developed strongly where territorial behavior is pronounced, i.e. in stream- and river-dwelling trout. There may be a selective pressure, favoring easily seen signals showing that a territory is occupied so that energy-demanding fights can be avoided. In open sea and estuaries where predators are frequent, conspicuous fin margins may be a disadvantage due to greater predation risks.

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.

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