Results 41 to 50 of about 6,162 (273)

A Multi‐Method Approach to Assessing Barrier Effectiveness in Preventing the Spread of Invasive Signal Crayfish (Pacifastacus leniusculus)

River Research and Applications, EarlyView.
ABSTRACT Relieving barriers and increasing free flowing rivers is a global imperative to restore habitat connectivity for migratory fish stocks. While reducing river fragmentation will certainly improve biodiversity, the spread of non‐native species throughout a river system may be facilitated as an inadvertent outcome.
Matthew Harwood, Andrew W. Bray, Karis A. Woolfenden, Paul D. Stebbing, Alison M. Dunn, Josie South   +5 more
wiley   +1 more source

Maintaining a wild phenotype in a conservation hatchery program for Chinook salmon: The effect of managed breeding on early male maturation.

PLoS ONE, 2019
In many salmonid species, age and size at maturation is plastic and influenced by the interaction between genetic and environmental factors. Hatchery reared salmon often mature at an earlier age and smaller size than wild fish. Modern salmon conservation
Donald A Larsen, Deborah L Harstad, Abby E Fuhrman, Curtis M Knudsen, Steven L Schroder, William J Bosch, Peter F Galbreath, David E Fast, Brian R Beckman   +8 more
doaj   +1 more source

Evaluating the Potential Fitness Effects of Chinook Salmon (Oncorhynchus tshawytscha) Aquaculture Using Non-Invasive Population Genomic Analyses of MHC Nucleotide Substitution Spectra

Animals, 2023
Genetic diversity plays a vital role in the adaptability of salmon to changing environmental conditions that can introduce new selective pressures on populations.
Evan J. Wilson, Andrew M. Shedlock
doaj   +1 more source

Age and length composition of Columbia Basin chinook, sockeye, and coho salmon at Bonneville Dam in 2000 [PDF]

, 2001
In 2000, representative samples of adult Columbia Basin chinook (Oncorhynchus tshawytscha), sockeye (O. nerka), and coho salmon (O. kisutch), populations were collected at Bonneville Dam. Fish were trapped, anesthetized, sampled for scales and biological
Fryer, Jeffrey K., Kelsey, Denise A.
core  

The influence of the freshwater environment and the biological characteristics of Atlantic salmon smolts on their subsequent marine survival

, 2012
Atlantic salmon have declined markedly in the past 20-30 years throughout their range. Much of the focus for this decline has been on increased mortality during the marine phase of the life cycle.
Moore, Andrew, Kennedy, Richard, Barry, Jon, Ibbotson, Anton, Todd, Christopher David, Russell, Ian, Potter, Ted, Aprahamian, Miran, Davidson, Ian, Fiske, Peder, Maclean, Julian, Otero, Jaime   +11 more
core   +1 more source

Experimental Evidence for Mobilization of Mercury From the Eggshell by the Developing Embryo in an Avian Model Organism

Environmental Toxicology, EarlyView.
ABSTRACT Of the many pollutants wildlife is exposed to, mercury ranks among the most toxic. In birds, mercury does not only accumulate within generations, but also is transferred across generations via maternal offloading in eggs, with higher mercury concentrations found in shells of unhatched eggs.
Matteo Beccardi, Justine Bertram, Sandra Bouwhuis, Pablo Salmón, Peter J. Schupp, Oscar Vedder   +5 more
wiley   +1 more source

Effects of Different SNP Calling and Sequence Mapping Choices on the Inference of Genetic Architecture Underlying Migration Tendency. [PDF]

Ecol Evol
We re‐analysed RAD‐Seq data from brown trout using a conspecific reference genome and alternative SNP pipelines. Population structure was robust across methods, but using the brown trout reference improved detection of biologically relevant outlier SNPs. ABSTRACT Genome‐wide association studies with identification of biologically relevant genes rely on
Mottola G, Panitz F, Leinonen T, Lemopoulos A, Vainikka A.   +4 more
europepmc   +2 more sources

Hatchery supplementation provides a demographic boost but alters age composition of sockeye salmon in Auke Lake, Southeast Alaska

Evolutionary Applications
Evaluating salmon hatchery supplementation programs requires assessing not only program objectives but identifying potential risks to wild populations as well.
Megan V. McPhee, Patrick D. Barry, Chris Habicht, Scott C. Vulstek, Joshua R. Russell, William W. Smoker, John E. Joyce, Anthony J. Gharrett   +7 more
doaj   +1 more source

Description of two new actinosporean types from a brook of Fuji Mountain, Honshu, and from Chitose River, Hokkaido, Japan

, 2003
Actinospore infection of oligochaetes living in the mud of 3 freshwater biotopes in Japan was studied. Using the cell-well plate method, a new aurantiactinomyxon type was found in 0.77 % of the examined Tubifex tubifex oligochaete specimens from a brook ...
Yokoyama, H., Ogawa, K., Timm, T., Székely, Csaba, Urawa, S.   +4 more
core   +1 more source

Supplementing beef cattle diets with brown seaweed affects coprophagous beetles' dung use

Agricultural and Forest Entomology, EarlyView.
Supplementing beef cattle diets with brown seaweed reduced the attractiveness of dung for a common dung beetle (Onthophagus nuchicornis). Dietary supplementation with brown seaweed appeared to reduce the proportion of major males in the F1 generation.
Samantha Bennett, Rhea Lumactud, Ghader Manafiazar, Paul Manning   +3 more
wiley   +1 more source