Results 31 to 40 of about 3,214 (221)

The identification of individuals with hatchery and natural origin in a mixed sample of Amur River chum salmon by Otolith microchemistry

Aquaculture and Fisheries, 2023
We estimated the proportion of hatchery and natural fall spawning chum salmon returning to the Amur River using chemical markers specific to hatchery-origin fry.
Pavel B. Mikheev, Denis V. Kotsyuk, Elena V. Podorozhnyuk, Vsesolod N. Koshelev, Atbkyh I. Nikiforov, Tatiana A. Sheina, Alexey Yu. Puzik, Mikhail A. Baklanov   +7 more
doaj   +1 more source

Evidence for adaptive explanations of semelparity in animals

Biological Reviews, EarlyView.
ABSTRACT Semelparity, the reproductive strategy of reproducing once, is widespread but uncommon in animals. Classes of models to explain the evolution of semelparity are based either on age structure and mortality schedules – demographic models in which high post‐reproductive mortality risk favours high reproductive effort and semelparity results from ...
Diana O. Fisher, Roberto Salguero‐Gómez   +1 more
wiley   +1 more source

Salmon fry predation by seabirds near an Alaskan hatchery [PDF]

Marine Ecology Progress Series, 1997
We es t~mated the mortality of hatchery-raised pink Oncorhynchus gorbuscha and chum 0 keta salmon fry from seabird predation near a salmon hatchery In Lake Bay, Prince William Sound, Alaska, USA. Fleld counts of seabirds and observations of feeding rates for plunge-diving seabirds were obtained durlng salmon fry releases between Apnl and June 1995 ...
D Scheel, KR Hough
openaire   +1 more source

Analysis of Gene Expression in Aedes aegypti Suggests Changes in Early Genetic Control of Mosquito Development

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, EarlyView.
ABSTRACT Aedes aegypti, a critical vector for tropical diseases, poses significant challenges for studying its embryogenesis due to difficulties in removing its rigid chorion and achieving effective fixation for in situ hybridization. Here, we present novel methodologies for fixation, dechorionation, DAPI staining, and in situ hybridization, enabling ...
Renata Coutinho‐dos‐Santos, Danielle Santos, Lupis Ribeiro, Jonathan J. Mucherino‐Muñoz, Marcelle Uhl, Carlos Logullo, A. Mendonça‐Amarante, M. Fantappie, Rodrigo Nunes‐da‐Fonseca   +8 more
wiley   +1 more source

Recent salmon declines: a result of lost feeding opportunities due to bad timing? [PDF]

PLoS ONE, 2010
As the timing of spring productivity blooms in near-shore areas advances due to warming trends in global climate, the selection pressures on out-migrating salmon smolts are shifting.
Cedar M Chittenden, Jenny L A Jensen, David Ewart, Shannon Anderson, Shannon Balfry, Elan Downey, Alexandra Eaves, Sonja Saksida, Brian Smith, Stephen Vincent, David Welch, R Scott McKinley   +11 more
doaj   +1 more source

Can we identify wild-born salmon from parentage assignment data? A case study in the Garonne-Dordogne rivers salmon restoration programme in France

Aquatic Living Resources, 2021
Parentage assignment with genomic markers provides an opportunity to monitor salmon restocking programs. Most of the time, it is used to study the fate of hatchery-born fish in those programs, as well as the genetic impacts of restocking.
Vandeputte Marc, Bestin Anastasia, Fauchet Louarn, Allamellou Jean-Michel, Bosc Stéphane, Menchi Olivier, Haffray Pierrick   +6 more
doaj   +1 more source

Non‐Physical Barrier Design and Environmental Conditions Alter Routing and Survival of Juvenile Chinook Salmon (Oncorhynchus tshawytscha) in the Sacramento‐San Joaquin River Delta

River Research and Applications, EarlyView.
ABSTRACT Pacific salmon face substantial challenges when migrating through anthropogenically modified river systems, such as the Sacramento‐San Joaquin River Delta (the Delta). Non‐physical behavioral barriers, such as the bioacoustic fish fence (BAFF), are one potential solution for guiding fish away from hazards without obstructing water flow ...
Maggie Raboin, Summer M. Burdick, Russell W. Perry   +2 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

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

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