Maintenance of a small anadromous subpopulation of brown trout (Salmo trutta L.) by straying

Summary 1. Microsatellite and isozyme loci variation were used to study structure and dynamics of a brown trout (Salmo trutta) population heavily affected by damming. The downstream area accessible for spawning was drastically reduced to a stream 1 km long influenced by regulated discharge. 2. Stock...

Full description

Saved in:
Bibliographic Details
Published in:Freshwater biology 2006-02, Vol.51 (2), p.351-358
Main Authors: AYLLON, F., MORAN, P., GARCIA-VAZQUEZ, E.
Format: Article
Language:English
Subjects:
anadromy
Animal and plant ecology
Animal, plant and microbial ecology
Biological and medical sciences
brown trout
damming
Fresh water ecosystems
Freshwater
Fundamental and applied biological sciences. Psychology
gene flow
isozyme loci
microsatellite loci
population structure
Salmo trutta
Synecology
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Summary 1. Microsatellite and isozyme loci variation were used to study structure and dynamics of a brown trout (Salmo trutta) population heavily affected by damming. The downstream area accessible for spawning was drastically reduced to a stream 1 km long influenced by regulated discharge. 2. Stocking of hatchery‐reared juveniles failed and the population is entirely supported by anadromous adults from neighbouring populations. 3. Temporal genetic stability is reported here. Some punctual between‐river genetic differences are likely because of different contribution from each neighbouring river through years. 4. High anadromy‐mediated gene flow produces a lack of genetic substructure in the region. The role of anadromous brown trout on maintenance of endangered small populations is emphasised.
ISSN:0046-5070
1365-2427
DOI:10.1111/j.1365-2427.2005.01486.x