Spatial Distribution and Behavioural Movements of Migratory Trout Salmo trutta in a Lake District Stream

10.2307/4424 ◽  
1986 ◽  
Vol 55 (3) ◽  
pp. 907 ◽  
Author(s):  
J. M. Elliott
Keyword(s):  
Spatial Distribution ◽  
Salmo Trutta ◽  
Lake District

Distribution and growth of brown trout in pristine headwaters of Central Europe

2013 ◽  
Vol 8 (3) ◽  
pp. 263-271 ◽  
Author(s):  
Libor Závorka ◽  
Pavel Horký ◽  
Ondřej Slavík
Keyword(s):  
Spatial Distribution ◽  
Brown Trout ◽  
Catchment Area ◽  
Salmo Trutta ◽  
Individual Growth ◽  
Population Abundance ◽  
The Czech Republic ◽  
Riverine Ecosystems ◽  
Brown Trout Salmo Trutta ◽  
The Individual

AbstractThe majority of stream-dwelling salmonid populations in Europe are affected by artificial stocking and the fragmentation of riverine ecosystems. The present study was performed in the unique pristine headwaters of the Otava River in the Elbe catchment area of the Czech Republic. The aim was to investigate the spatial distribution and individual growth pattern of brown trout, Salmo trutta, populations. Twenty sites in two main streams and their tributaries were sampled twice a year (spring and autumn) during the period 2005–2011. The sampling sites were grouped into fourteen so-called synchronised population units within the boundaries of three populations, according to analyses of synchrony in population abundance. The individual growth of juveniles (age-0, age-1) varied between all three spatial units (sampling sites, synchronised population units and populations), while the individual growth of adults (age-2 and older) did not. The distinctiveness regarding individual growth and demographic independence among the synchronised population units and populations indicates their suitability for use as population units for management purposes.

scholarly journals The role of the south-western Alps as a unidirectional corridor for Mediterranean brown trout (Salmo trutta complex) lineages

2020 ◽  
Vol 131 (4) ◽  
pp. 909-926
Author(s):  
Andrea Splendiani ◽  
Patrick Berrebi ◽  
Christelle Tougard ◽  
Tommaso Righi ◽  
Nathalie Reynaud ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Spatial Distribution ◽  
River Basin ◽  
Salmo Trutta ◽  
Western Alps ◽  
Molecular Dating ◽  
The South ◽  
The Mediterranean ◽  
Mediterranean Trout

Abstract The role of the south-western Alps as a corridor for Mediterranean trout (Salmo trutta complex Linnaeus, 1758) was evaluated in order to understand the influence of the last glacial events in shaping the spatial distribution of the genetic diversity of this salmonid. For this, the allochthonous hypothesis of a man-mediated French origin (19th century) of the Mediterranean trout inhabiting the Po tributaries in the Italian side of the south-western Alps was tested. A total of 412 individuals were analysed at the mitochondrial control region. The phylogenetic classification was carried out by using a Median-Joining Network analysis. Mismatch pair-wise analysis, molecular dating and Kernel density distribution analysis of the main mitochondrial lineages were evaluated to compare past demographic dynamics with the current spatial distribution of genetic diversity. The main outcomes resulted strongly in agreement with a biogeographic scenario where the south-western Alps acted as a unidirectional corridor that permitted the colonization of the upper Durance (Rhône River basin) by trout from the Po River basin. Therefore, the Mediterranean trout should be considered as native also along the Italian side of the south-western Alps and the allochthonous hypothesis should be rejected.

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