Results 81 to 90 of about 4,596 (221)

Tracking Long‐Term Trends in Sockeye Salmon (Oncorhynchus nerka) Population Dynamics Using Sterol and Stanol Biomarkers in Lake Sediments

Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 9, September 2025.
Abstract We analyzed biomarkers, including sterols, stanols, and δ15N, in sediment cores from lakes with well‐documented sockeye salmon return histories. Our goal was to improve estimates of past changes in salmon escapement, that is, the population that return to their freshwater nursery lakes, inferred using sediment biogeochemical markers ...
D. Dagodzo, D. C. Eickmeyer, L. E. Kimpe, D. T. Selbie, J. P. Smol, J. M. Blais   +5 more
wiley   +1 more source

Maturation and growth of Pacific Mackerel, Scomber japonicus Houttuyn [PDF]

, 1973
The maturation of Pacific mackerel has never been documented clearly. Analysis of data reveals spawning can occur from March through October, but the majority takes place from April through August. During this April through August period, 22.5%, 65.7%
Knaggs, Eric H., Parrish, Richard H.
core  

Pathogens From Salmon Aquaculture in Relation to Conservation of Wild Pacific Salmon in Canada: An Alternative Perspective

Aquaculture, Fish and Fisheries, Volume 5, Issue 4, August 2025.
ABSTRACT Several articles over the last two decades have provided data, analyses and interpretations that suggest there are significant impacts of pathogens transmitted from farmed salmon on wild Pacific salmon populations in British Columbia (BC), the westernmost province of Canada.
Gary D. Marty, Jayde A. Ferguson, Theodore R. Meyers, Thomas B. Waltzek, Michael L. Kent, Esteban Soto   +5 more
wiley   +1 more source

Pink salmon fishery in the European part of Russia: results for 2023

Известия ТИНРО
Pink salmon is currently the main species for the anadromous fish fishery in the north of the European part of Russia. Upward trends were observed in this species returns and catches in odd years of the 2013–2021 in the regions of North-West Russia ...
I. I. Gordeev, A. V. Tkachenko, A. M. Tortsev, I. I. Studionov, E. A. Genrikh, A. N. Kanzeparova, V. A. Belyaev   +6 more
doaj   +1 more source

Chromosomal Inversion Associated With Diet Differences in Common Quails Sharing Wintering Grounds

Ecology and Evolution, Volume 15, Issue 8, August 2025.
A large chromosomal inversion in common quails (Coturnix coturnix) is associated with phenotypic traits. In a wintering population in southern Spain, we found all three karyotypes coexisting but showing differences in migratory behavior and diet, as exemplified by the isotopic signature.
Celia Vinagre‐Izquierdo, Ines Sanchez‐Donoso, Jennifer A. Leonard, José Domingo Rodríguez‐Teijeiro, Carles Vilà   +4 more
wiley   +1 more source

Pacific Salmon, Oncorhynchus spp., and the Definition of "Species" Under the Endangered Species Act [PDF]

, 1991
For purposes ofthe Endangered Species Act (ESA), a "species" is defined to include "any distinct population segment of any species of vertebrate fish or wildlife which interbreeds when mature. "Federal agencies charged with carrying out the provisions of
Waples, Robin S.
core  

Biological and Physical Environmental Drivers of Diet Variation in Northern Fur Seals

Ecology and Evolution, Volume 15, Issue 8, August 2025.
Interannual variation in northern fur seal diet composition was influenced by physical and biological variables within local foraging areas in the eastern Bering Sea. Our findings indicate that projected environmental changes in the eastern Bering Sea are likely to affect fur seal diet composition and potentially increase trophic pressure on non ...
Elizabeth A. McHuron, Jeremy T. Sterling, Katie Luxa, James Thorson, Rod Towell, Rolf R. Ream, Tonya Zeppelin   +6 more
wiley   +1 more source

Synthesis of academic and traditional ecological knowledge identifies ancient and ongoing hybridization of whitefish species in Beringia

Ecological Solutions and Evidence, Volume 6, Issue 3, July–September 2025.
Hybridization of whitefishes is found at both deep and shallow time scales and with a broad geographic distribution across Beringia. Documentation of this phenomenon is important to leverage it as an ecological monitoring tool and avenue for evolutionary investigations.
Kevin M. Fraley, Randy J. Brown, Alex Whiting, William K. Carter III, J. Andrés López, Martin D. Robards, Matthew A. Campbell   +6 more
wiley   +1 more source

Effect of dietary estradiol-17β on growth performance, body composition and blood indices in Stellate sturgeon, Acipenser stellatus [PDF]

, 2014
This study was investigated the effects of dietary estradiol-17β (E2) on growth, body composition and blood indices in Acipenser stellatus. Fish (40.9 ± 1.1 g average initial weight; n = 60 per group) were fed with three different diets containing 0 ...
Ahmadnezhad, M., Falahatkar, B., Khara, H., Meknatkhah, B., Poursaeid, S.   +4 more
core  

Climate vulnerability assessment for Pacific salmon and steelhead in the California Current Large Marine Ecosystem. [PDF]

, 2019
Major ecological realignments are already occurring in response to climate change. To be successful, conservation strategies now need to account for geographical patterns in traits sensitive to climate change, as well as climate threats to species-level ...
Beechie, Tim, Bograd, Steven J, Boughton, David A, Carr, Mark, Cooney, Thomas D, Crozier, Lisa G, Dunham, Jason B, Greene, Correigh M, Haltuch, Melissa A, Hazen, Elliott L, Holzer, Damon M, Huff, David D, Johnson, Rachel C, Jordan, Chris E, Kaplan, Isaac C, Lindley, Steven T, Mantua, Nathan J, McClure, Michelle M, Moyle, Peter B, Myers, James M, Nelson, Mark W, Spence, Brian C, Weitkamp, Laurie A, Williams, Thomas H, Willis-Norton, Ellen   +24 more
core   +1 more source