A continuum of life history tactics in a brown trout (Salmo trutta) population

2005 ◽  
Vol 62 (7) ◽  
pp. 1600-1610 ◽  
Author(s):  
Julien Cucherousset ◽  
Dominique Ombredane ◽  
Katia Charles ◽  
Frédéric Marchand ◽  
Jean-Luc Baglinière
Keyword(s):  
Life History ◽  
Brown Trout ◽  
Salmo Trutta ◽  
Environmental Variability ◽  
Continuous Distribution ◽  
Juvenile Growth ◽  
Migratory Behaviour ◽  
Brown Trout Salmo Trutta ◽  
And Migration ◽  
Pit Tagging

Life history tactics of the brown trout (Salmo trutta) population of the Oir River (Normandy, France) were studied using passive integrated transponder (PIT) tagging data of five consecutive cohorts (5900 individuals) monitored between 1995 and 2002. Results demonstrate that (i) life history traits vary among cohorts, chiefly caused by environmental variability, (ii) juvenile growth, particularly second-year growth, plays an important role in the determination of the growing environment and trout exhibit variable migratory behaviour (from remaining in the natal brook to migrating in the sea) related to their juvenile growth rate, and (iii) the description of life history tactics (including juvenile growth, fine-scale migratory behaviour, and reproduction) can be clarified. Tactics are expressed along a continuum in time (age to reproduce) and space (distance of migration). Flexible life history tactics varying with juvenile growth is consistent with previous studies, but the use of empiric data on growth and migration from PIT tagging allows refining the description of life history tactics, taking into account their continuous distribution in time and space.

Brown trout (Salmo trutta) habitat use and life history in Swedish streams: possible effects of biotic interactions

1998 ◽  
Vol 55 (4) ◽  
pp. 1034-1042 ◽  
Author(s):  
Ingemar Näslund ◽  
Erik Degerman ◽  
Fredrik Nordwall
Keyword(s):  
Life History ◽  
Habitat Use ◽  
Brown Trout ◽  
Fish Species ◽  
Salmo Trutta ◽  
Adult Survival ◽  
National Database ◽  
Juvenile Growth ◽  
Growth And Survival ◽  
Brown Trout Salmo Trutta

To test if habitat use and life history of stream-dwelling brown trout (Salmo trutta) differed between allopatric and sympatric situations, we compared three streams with differing fish communities and used data from a large national database containing electrofishing results from Swedish streams. In the three-creek study, allopatric brown trout used all habitats and shifted from nursery areas in riffles to pool habitats, where adult growth and survival were higher. Mainly females shifted habitat and this was undertaken after age 1. Sympatric brown trout under intense pressure from other fish species remained in the riffles throughout their life cycle. Under moderate pressure from other species, larger brown trout used slow-flowing habitats. Early growth was more rapid in sympatry. Sympatric brown trout also had a lower adult to juvenile growth ratio and lower adult survival and matured earlier than allopatric brown trout. The data from the nationwide database showed that frequency of occurrence and abundance of brown trout were negatively associated with the number of coexisting fish species. It was also verified that the habitat shifts between riffles and pools were more common and possibly more beneficial in terms of growth and survival in allopatry. In addition the existence of differences in juvenile growth between allopatric and sympatric populations was verified.

scholarly journals Alternative routes to piscivory: Contrasting growth trajectories in brown trout ( Salmo trutta) ecotypes exhibiting contrasting life history strategies

2018 ◽  
Vol 28 (1) ◽  
pp. 4-10 ◽  
Author(s):  
Martin R. Hughes ◽  
Oliver E. Hooker ◽  
Travis E. Leeuwen ◽  
Alan Kettle‐White ◽  
Alastair Thorne ◽  
...  
Keyword(s):  
Life History ◽  
Brown Trout ◽  
Salmo Trutta ◽  
Life History Strategies ◽  
Growth Trajectories ◽  
Brown Trout Salmo Trutta ◽  
Alternative Routes

scholarly journals Genetic structuring across alternative life‐history tactics and small spatial scales in brown trout ( Salmo trutta )

2020 ◽  
Author(s):  
Jessica R. Rodger ◽  
Hannele M. Honkanen ◽  
Caroline R. Bradley ◽  
Patrick Boylan ◽  
Paulo A. Prodöhl ◽  
...  
Keyword(s):  
Life History ◽  
Brown Trout ◽  
Salmo Trutta ◽  
Spatial Scales ◽  
Genetic Structuring ◽  
Brown Trout Salmo Trutta

Seascape and its effect on migratory life-history strategy influences gene flow among coastal brown trout (Salmo trutta) populations in the English Channel

2015 ◽  
Vol 43 (3) ◽  
pp. 498-509 ◽  
Author(s):  
Erwan Quéméré ◽  
Jean-Luc Baglinière ◽  
Jean-Marc Roussel ◽  
Guillaume Evanno ◽  
Philip McGinnity ◽  
...  
Keyword(s):  
Life History ◽  
Gene Flow ◽  
Brown Trout ◽  
Salmo Trutta ◽  
Life History Strategy ◽  
English Channel ◽  
Brown Trout Salmo Trutta
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