Results 51 to 60 of about 1,431 (210)

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

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

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

Modern state of aquatic biological resources of the Amur River basin and directions of their research

Известия ТИНРО, 2020
Current status of aquatic biological resources in the middle and lower parts of the Amur River basin, including Lake Khanka and the Amursky Liman, is assessed. Generally high abundance of the water organisms is noted, but a downward trend is revealed. In
N. V. Kolpakov, D. V. Kotsyuk, V. I. Ostrovsky, N. N. Semenchenko, V. N. Koshelev, A. P. Shmigirilov, E. V. Ostrovskaya, E. I. Barabanshchikov, T. V. Kozlova, S. E. Kulbachny, E. V. Podorozhnyuk, O. V. Vilkina, M. E. Shapovalov   +12 more
doaj   +1 more source

Characterization of salmon‐foraging harbor seals (Phoca vitulina) in the Erimo region, Hokkaido, Japan, using finite mixture models

The Journal of Wildlife Management, Volume 90, Issue 2, February 2026.
Finite mixture models revealed that older, larger harbor seals specialize in salmon predation at setnets in Hokkaido, Japan, suggesting targeted management strategies focusing on these specialist individuals could effectively reduce fishery conflicts while protecting the broader seal population.
Takahito Masubuchi, Mari Kobayashi
wiley   +1 more source

Population Differences in Rainbow Smelt, Osmerus mordax: Multivariate Analysis of Mensural and Meristic Data

, 1977
The phenetic relationships are investigated between 13 samples of sexually mature rainbow smelt, Osmerus mordax, from 12 collecting sites including representatives of anadromous and landlocked populations.
D. G. Copeman
core   +1 more source

Groundtruthing of pelagic forage fish detected by hydroacoustics in a whale feeding area using environmental DNA

Environmental DNA, 2020
Conservation of whales, considered as umbrella species in marine environments, requires to be able to understand their relationships with ecosystem components such as prey species, including pelagic fish. However, studying such relationships in nature is
Chloé Suzanne Berger, Bérénice Bougas, Samuel Turgeon, Sophia Ferchiou, Nadia Ménard, Louis Bernatchez   +5 more
doaj   +1 more source

Wild and Naturalized Hatchery Brown Trout: A Comparison of Movement, Space Use, and Survival in a Large Lake

Fisheries Management and Ecology, Volume 33, Issue 1, Page 14-23, February 2026.
ABSTRACT Most research comparing wild and hatchery‐produced fish focuses on recently stocked individuals. As a result, these studies only investigate the behavior of naive hatchery fish, leaving a knowledge gap regarding long‐term survivors. We compared the movement, space use, and survival of wild and hatchery‐reared brown trout (Salmo trutta) that ...
Daniel Palm, Jack A. Brand, Petter Lundberg, James P. Losee, Tomas Brodin, Michael G. Bertram, Gustav Hellström   +6 more
wiley   +1 more source