Results 51 to 60 of about 4,698 (215)

Multi‐Seasonal eDNA Metabarcoding Highlights a Resurgence in Fish Diversity Across a Severely Impacted Estuarine Ecosystem

Aquaculture, Fish and Fisheries, Volume 6, Issue 2, April 2026.
ABSTRACT Aquatic ecosystems have been in an alarming state of decline for decades. In particular, estuarine ecosystems have experienced long‐term declines in fish diversity due to factors such as habitat degradation, pollution and altered hydrology. Monitoring these systems is often limited by the difficulty and cost of conventional survey methods.
Jake M. Jackman, Naiara Guimarães Sales, Chiara Benvenuto, Andrea Drewitt, Andrew Wolfenden, Peter E. Robins, Ilaria Coscia, Allan D. McDevitt   +7 more
wiley   +1 more source

Seasonal Variation of δ13C and δ15N in a Boreal Lake Fish Community—Year‐Round Patterns and Explanatory Variables

Ecology of Freshwater Fish, Volume 35, Issue 2, April 2026.
ABSTRACT Seasonal changes in freshwater ecosystems influence fish resource use through both environmental and biological factors, but year‐round studies that include ice‐covered months have been lacking. We investigated seasonal variation in the stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) using year‐round monthly sampling of the fish ...
E. S. Eerola, B. Hayden, A. J. Piro, K. K. Kahilainen   +3 more
wiley   +1 more source

Comparing Fish Density and Echo Strength Distribution Recorded by Two Generations of Single Beam Echo Sounders

Applied Sciences, 2019
Hydroacoustic acquisition was performed by means of two different single beam systems, the Simradmodel EK15 from 2015 and the Simrad model EY-M from the 1980s to explore potential differences of fish density and target strength (TS) distribution between ...
Arne N. Linløkken, Frode Næstad, Kjell Langdal, Kjartan Østbye   +3 more
doaj   +1 more source

Comparisons among three diet analyses demonstrate multiple patterns in the estimated adult diet of a freshwater piscivore, Salvelinus namaycush

Ecological Indicators, 2021
Understanding trophic interactions is critical for successful resource management. However, studying diet patterns (e.g., spatial and seasonal changes) can require extensive effort.
Matthew H. Futia, Scott F. Colborne, Aaron T. Fisk, Dimitry Gorsky, Timothy B. Johnson, Brian F. Lantry, Jana R. Lantry, Jacques Rinchard   +7 more
doaj   +1 more source

Protecting a threatened coastal fish species through regional collaboration [PDF]

, 2010
Rainbow smelt (Osmerus mordax) are small anadromous fish that live in nearshore coastal waters during much of the year and migrate to tidal rivers to spawn during the spring.
Mills, Kathy
core  

Locating Little Larvae: Environmental DNA Methods Can Detect a Rare Fish Species Under Field Estuarine Conditions

Environmental DNA, Volume 8, Issue 2, March/April 2026.
We measured a positive linear relationship between eDNA concentration and abundance for larval Delta Smelt (Hypomesus transpacificus) with N = 1 larva exceeding the limit of detection for the novel qPCR assay. Field experiments quantified the probability of detection for eDNA sampling methods at known abundances and distances from source. ABSTRACT Rare
Sarah A. Stinson, Melinda R. Baerwald, Kevan Yamahara, Avery Scherer, Yekaterina Karpenko, Cheryl Dean, Matthew B. Espe, Gregg Schumer, Sarah Brown, Brian Schreier, Daphne Gille   +10 more
wiley   +1 more source

Recrutement des poissons dans le fjord du Saguenay [PDF]

, 2009
La faune ichtyologique du fjord du Saguenay est composée de plus de 60 espèces de poissons marins, diadromes et dulcicoles dont plusieurs font l’objet d’une pêche récréative comme l’éperlan arc-en-ciel anadrome (Osmerus mordax), le sébaste (Sebastes spp.)
Diab, Gabriel, Fortin, Anne-Lise, Gagné, Jacques A., Ménard, Nadia, Plourde, Stéphane, Sirois, Pascal   +5 more
core   +1 more source

A Conceptual Framework and Methods for Studying the Connectivity of Fishes

Fish and Fisheries, Volume 27, Issue 2, Page 342-369, March 2026.
ABSTRACT Connectivity is a multifaceted concept that has important implications for the management and conservation of marine and freshwater fishes. We developed a conceptual framework that encompasses multiple, interrelated categories of connectedness, including landscape (e.g., structural, functional) connectivity and ecological (e.g., trophic ...
Jordanna N. Bergman, Jessica A. Robichaud, Jasper McCutcheon, Michael T. Booth, Brendan Campbell, Grace A. Casselberry, Cienna R. Cooper, Bronwyn M. Gillanders, Lucas P. Griffin, Edward Hale, Luc LaRochelle, Karen J. Murchie, Mary Peacock, Reid G. Swanson, Simon D. Stewart, Ryan. J. Woodland, Daniel P. Zielinski, Steven J. Cooke, Morgan L. Piczak   +18 more
wiley   +1 more source

Distributions of Cisco (Coregonus artedi) in the upper Great Lakes in the mid-twentieth century, when populations were in decline.

PLoS ONE, 2022
The restoration of the once abundant Cisco (Coregonus artedi) is a management interest across the Laurentian Great Lakes. To inform the restoration, we (1) described historical distributions of Cisco and (2) explored whether non-indigenous Rainbow Smelt (
Yu-Chun Kao, Renee E Renauer-Bova, David B Bunnell, Owen T Gorman, Randy L Eshenroder   +4 more
doaj   +1 more source

What to Expect After a Commercial Fishery Ban? Long Term Fish Size and Biomass Trends in Two Productive Water Bodies With Contrasting Management Regimes

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 2, February 2026.
ABSTRACT Commercial fishing is often assumed to have greater impacts than recreational fishing, and many fisheries assessments overlook the latter. Yet, numerous coastal and freshwater fish populations are subject to both fishing types and environmental pressures, all influencing biomass, body size and community structure and making management outcomes
Eglė Jakubavičiūtė, Žilvinas Pūtys, Linas Ložys, Asta Audzijonyte   +3 more
wiley   +1 more source