U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Subject term immigration Remove constraint Subject term: immigration Subject term Salmo trutta Remove constraint Subject term: Salmo trutta
Start Over

Search

11  Search Results

1 - 11 of 11
Number of results to display per page

Search Results

1. Relationships between boron concentrations and trout in the firehole river, wyoming : Historical Information and Preliminary Results of a Field Study

Author:
Joseph S. Meyer; Ann M. Boelter; Daniel F. Woodward; Jack N. Goldstein; Aïda M. Farag; Wayne A. Hubert
Source:
Biological trace element research 1998 v.66 no.1-3 pp. 167-184
ISSN:
0163-4984
Subject:
national parks; Salmo trutta; hot springs; reproduction; rivers; winter; Oncorhynchus mykiss; boron; spawning; spring; water temperature; water content; summer; trout; mineral content; immigration
Abstract:
... The Firehole River (FHR) in Yellowstone National Park (YNP) is a world-renowned recreational fishery that predominantly includes rainbow trout (RBT,Oncorhynchus mykiss) and brown trout (BNT,Salmo trutta). The trout populations apparently are closed to immigration and have been self-sustaining since 1955. Inputs from hot springs and geysers increase the temperature and mineral content of the water, ...
DOI:
10.1007/BF02783136

2. Densities of juvenile brown trout (Salmo trutta) in two subarctic rivers: assessing the predictive capability of habitat preference indices

Author:
Aki Mäki-Petäys; Timo Muotka; Ari Huusko
Source:
Canadian journal of fisheries and aquatic sciences 1999 v.56 no.8 pp. 1420-1427
ISSN:
1205-7533
Subject:
Salmo trutta; adverse effects; habitat preferences; habitats; immigration; juveniles; models; prediction; rivers; summer; trout; winter; Finland
Abstract:
... We examined the applicability of habitat preference indices for predicting density variations of age-0 brown trout (Salmo trutta) in two rivers in northern Finland. Trout densities in these rivers were monitored for 7 or 8 years. Habitat suitability for trout fry was assessed using summer and winter preference curves for water velocity, depth, and substrate. Substrate suitability indices based on ...
DOI:
10.1139/f99-072

3. Spatial and temporal genetic differentiation and effective population size of brown trout (Salmo trutta, L.) in small Danish rivers

Author:
Jensen, Lasse F.; Hansen, Michael M.; Carlsson, Jens; Loeschcke, Volker; Mensberg, Karen-Lise D.
Source:
Conservation genetics 2005 v.6 no.4 pp. 615-621
ISSN:
1566-0621
Subject:
Salmo trutta; gene flow; genetic variation; immigration; lakes; microsatellite repeats; models; pollution; population size; rivers; trout; variance; Denmark
Abstract:
... The spatial and temporal genetic structure of brown trout populations from three small tributaries of Lake Hald, Denmark, was studied using analysis of variation at eight microsatellite loci. From two of the populations temporal samples were available, separated by up to 13 years (3.7 generations). Significant genetic differentiation was observed among all samples, however, hierarchical analysis o ...
DOI:
10.1007/s10592-005-9014-8

4. Genetic structure and demographic history of brown trout (Salmo trutta) populations from the southern Balkans

Author:
APOSTOLIDIS, APOSTOLOS P.; MADEIRA, MARIA-JOSE; HANSEN, MICHAEL M.; MACHORDOM, ANNIE
Source:
Freshwater biology 2008 v.53 no.8 pp. 1555-1566
ISSN:
0046-5070
Subject:
Salmo trutta; biodiversity; gene pool; genetic variation; hybrids; immigration; introgression; microsatellite repeats; mitochondrial DNA; rivers; trout; Balkans
Abstract:
... 1. The present study was designed to characterize the genetic structure of brown trout (Salmo trutta) populations from the southern Balkans and to assess the spread of non-native strains and their introgression into native trout gene pools. We analysed polymorphism at nine microsatellite loci in seven supposedly non-admixed and three stocked brown trout populations. 2. The analyses confirmed the a ...
DOI:
10.1111/j.1365-2427.2008.01988.x

5. Rehabilitation of brown trout, Salmo trutta, habitat damaged by riparian grazing in an English chalkstream

Author:
SUMMERS, D.W.; GILES, N.; STUBBING, D.N.
Source:
Fisheries management and ecology 2008 v.15 no.3 pp. 231-240
ISSN:
0969-997X
Subject:
Salmo trutta; adults; grazing; habitat preferences; habitats; immigration; juveniles; rivers; trout; England
Abstract:
... Rehabilitation trials involving riparian fencing and limited pool excavation were conducted on the River Piddle and Devil's Brook, Dorset, England, which had been degraded by intensive riparian grazing. In one trial, based on two short (94 and 99 m) treated sections and two control sections, brown trout, Salmo trutta L., numbers were monitored from 1994 (pre-treatment) to 2000. In a second trial f ...
DOI:
10.1111/j.1365-2400.2008.00604.x

6. Evidence of source–sink metapopulations in a vulnerable native galaxiid fish driven by introduced trout

Author:
Darragh J. Woodford; Angus R. McIntosh
Source:
Ecological applications 2010 v.20 no.4 pp. 967-977
ISSN:
1051-0761
Subject:
Galaxias vulgaris; Oncorhynchus mykiss; Salmo trutta; adults; immigration; indigenous species; invasive species; juveniles; landscapes; models; monitoring; population growth; population structure; predators; refuge habitats; rivers; subwatersheds; summer; trout; winter; New Zealand
Abstract:
... Introduced predators with patchy distributions can create demographic sinks within native prey populations. Such invasions may give rise to source–sink metapopulations if there are still sources of native species colonists in the landscape. In New Zealand, introduced brown trout (Salmo trutta) and rainbow trout (Oncorhychus mykiss) are linked with declines in native non‐diadromous galaxiids but co ...
DOI:
10.1890/08-1909.1

7. Gillnet fishing drives lake-migrating brown trout to near extinction in the Lake Päijänne region, Finland

Author:
SYRJÄNEN, J.; VALKEAJÄRVI, P.
Source:
Fisheries management and ecology 2010 v.17 no.2 pp. 199-208
ISSN:
0969-997X
Subject:
Salmo trutta; bycatch; dredging; eggs; extinction; genetic variation; gillnets; humans; immigration; lakes; migratory behavior; overfishing; reproduction; smolts; spawning; stakeholders; stream channels; trout; water quality; Finland
Abstract:
... Wild stocks of brown trout, Salmo trutta L., collapsed in Finnish inland waters during the 20th Century because dams prevented upstream migration, and low water quality and stream dredging weakened reproduction. The demise in migratory stocks was coupled with overfishing, mainly by gillnetting on lakes. Consequently, the migratory spawning stocks have diminished to negligible levels. The remaining ...
DOI:
10.1111/j.1365-2400.2010.00738.x

8. Location of demographic sources affects the distributions of a vulnerable native fish in invaded river networks

Author:
WOODFORD, DARRAGH J.; McINTOSH, ANGUS R.
Source:
Freshwater biology 2011 v.56 no.2 pp. 311-324
ISSN:
0046-5070
Subject:
Galaxiidae; Oncorhynchus mykiss; Salmo trutta; biomass; immigration; indigenous species; landscapes; predation; predator-prey relationships; predators; refuge habitats; rivers; streams; surveys; trout; New Zealand
Abstract:
... 1. Invasive predators negatively affect native prey to varying degrees across landscapes, and spatial configuration of invader-free refugia may affect prey distributions across invaded river networks. In New Zealand, introduced trout (Salmo trutta and Oncorhynchus mykiss) create source-sink dynamics in native Galaxias vulgaris populations, and their co-occurrence with trout may be enhanced by immi ...
DOI:
10.1111/j.1365-2427.2010.02498.x

9. Demographic changes following mechanical removal of exotic brown trout in an Intermountain West (USA), high‐elevation stream

Author:
W. Carl Saunders; Phaedra Budy; Gary P. Thiede
Source:
Ecology of freshwater fish 2015 v.24 no.2 pp. 252-263
ISSN:
0906-6691
Subject:
Salmo trutta; adults; fish; immigration; indigenous species; introduced species; juveniles; mortality; rivers; streams; watersheds; Intermountain West region; Utah
Abstract:
... Exotic species present a great threat to native fish conservation; however, eradicating exotics is expensive and often impractical. Mechanical removal can be ineffective for eradication, but nonetheless may increase management effectiveness by identifying portions of a watershed that are strong sources of exotics. We used mechanical removal to understand processes driving exotic brown trout (Salmo ...
DOI:
10.1111/eff.12143

10. Long-term population demographics of native brook trout following manipulative reduction of an invader

Author:
R. John H. Hoxmeier; Douglas J. Dieterman
Source:
Biological invasions 2016 v.18 no.10 pp. 2911-2922
ISSN:
1387-3547
Subject:
Salmo trutta; Salvelinus fontinalis; adults; body condition; demographic statistics; ecological invasion; experimental design; immigration; streams; sympatry; trout
Abstract:
... Although laboratory studies have provided evidence for negative interactions between brook trout and brown trout, it is unknown how these interactions affect larger scale demographics in a natural setting. We tested the effects of invasive brown trout on brook trout demographics by removing brown trout from a sympatric population using a before–after control-impact study design. The study was cond ...
DOI:
10.1007/s10530-016-1182-6

11. Natural and domestic introgressions in the marble trout population of Soča River (Slovenia)

Author:
P. Berrebi; D. Jesenšek; A. J. Crivelli
Source:
Hydrobiologia 2017 v.785 no.1 pp. 277-291
ISSN:
0018-8158
Subject:
Salmo trutta; alleles; allozymes; genotyping; hybrids; immigration; introgression; loci; microsatellite repeats; mitochondria; rivers; surveys; trout; Italy; Slovenia
Abstract:
... The endemic marble trout, Salmo trutta marmoratus, suffered massive stocking with brown trout in Slovenia and Italy. In the Soča River (Slovenia) long-term surveys have evidenced Danubian and Atlantic introgressions. The observation of discrepancies between introgression frequencies when using morphology, mitochondrial sequences, allozymes, or microsatellites markers led to reanalyze the hybrid po ...
DOI:
10.1007/s10750-016-2932-2