Fish Ecology and Management Studies

Feeding ecology and ecological risks of the invasive fish Coreoperca herzi revealed by gut content DNA and environmental DNA metabarcoding

This study uses gut content and environmental DNA metabarcoding to assess the feeding ecology and ecological risks of the invasive Korean perch in Japan.

Insights on Human Dimensions of Freshwater Fish Conservation in Jharkhand and Bihar, India

This study examines stakeholder attitudes and social factors influencing freshwater fish conservation in Jharkhand and Bihar, identifying key challenges and opportunities for participatory conservation.

Do anglers take the bait? Anglers' perceptions about fluvial barriers in three river basins in Northern Spain

This study examines anglers' perceptions of river barriers in Northern Spain and finds they have lower ecological awareness and more misconceptions compared to non-anglers.

Degradation of fish food webs in the anthropocene

This study evaluates changes in fish food web topology and functioning over time, finding increased connectance, generalism, and decreased modularity, which affect ecosystem functions and human well-being.

Functional response predicts invasiveness but not trophic impact

Across 269 functional responses from 45 freshwater fish species, invasive species exceed non-invasive species only when sampled in their native range; introduced populations match non-invasive species.

Quicklime-based eradication attempt of Xenopus laevis as a model for controlling pondscape invasions

The paper evaluates quicklime as a method to eradicate invasive Xenopus laevis in ponds, showing reduced eDNA levels but partial recovery.

Intrinsic fitness differences outweigh environmental matching in shaping introduction outcomes in nature

This study introduces >12,000 threespine stickleback into nine lakes to test if environmental matching or intrinsic population traits predict introduction success, finding intrinsic traits are more important.

Long-term decline in egg size of Japanese hatchery chum salmon links to declines in return rate and abundance

Biological, freshwater, and marine drivers of age at maturity in wild Chinook Salmon

The paper links juvenile life stage factors to adult age at maturity in Chinook Salmon using a Bayesian model, finding growth and timing factors more influential than environmental conditions.

Combining participatory mapping and oral histories of veteran fishers to identify long-term environmental change in a nationally significant river

This study uses oral histories and participatory mapping from veteran fishers to identify long-term environmental changes in the Rakaia River, highlighting policy and monitoring gaps.

Climate-driven habitat loss and natural fragmentation increase extinction risk and compromise population viability in freshwater fish

This study models extinction risk and population viability in freshwater fish under climate change, showing increased threats to cold-water species and small coastal rivers.

Integrating Biological and Machine Learning Models for Rainbow Trout Growth: Balancing Accuracy and Interpretability

The paper evaluates hybrid models combining biological and machine learning approaches for predicting rainbow trout growth, showing significant improvements in accuracy and interpretability.

Environmental stress amplifies competitive asymmetry and drives divergent hybrid zone outcomes

The paper tests how environmental stress affects competitive asymmetry in two hybrid darter species, showing that stress amplifies competition and leads to different hybrid zone outcomes.

Application of CMSY method to estimate biological reference points of Piracatinga (Calophysus macropterus Lichtenstein, 1819) from the upper Solimoes River in the Amazon Basin

This study applies the CMSY method to estimate biological reference points for Piracatinga in the Amazon Basin, finding it in a sustainable state but recommending precautionary measures.

The effect of environmental enrichment on whole-brain gene expression in an imperiled fish

This study examines how abiotic and biotic enrichment in hatchery environments affects whole-brain gene expression in Arkansas darters, finding that abiotic enrichment reduces phenotypic mismatch with wild populations.

Fish spawning events stimulate trophic hotspots across freshwater food webs

The paper investigates how fish spawning events create trophic hotspots by attracting diverse consumers across ecosystems, revealing the ecological significance of reproductive resource pulses.

Live fast and die young: walleye populations adapt their life cycle to degraded lakes of the Canadian clay belt.

This study compares walleye populations in degraded and non-degraded lakes, finding that young-of-the-year grow faster in degraded lakes due to abundant zooplankton, but adult mortality compromises population stability.

Disturbance provides limited respite for native fish against invaders

The paper uses competition models to show native fish coexist best with invaders at intermediate disturbance levels, but high disturbance alone may not ensure their survival.

Larger larval sea lamprey (Petromyzon marinus) have longer survival times when exposed to the lampricide 3-trifluoromethyl-4-nitrophenol

The paper tests if larval sea lamprey size affects survival time when exposed to TFM, finding a significant positive relationship between length, mass, and survival time.

Release strategies affect the freshwater residence and survival of hatchery-reared juvenile Chinook Salmon

This study examines how release size, location, and timing affect freshwater survival and residence of hatchery-reared Chinook Salmon, finding that survival and residence time decline with size and vary by release location and timing.

Development of a Two-Stage Life Cycle Model to Inform the Trap and Haul Program for Coho Salmon in the Lewis River, Washington

This paper develops a two-stage life cycle model to estimate Coho salmon productivity and survival rates, informing the trap and haul program in the Lewis River Basin.

Biodiversity temporal trends are reshaping food web structure and redundancy in riverine ecosystems

The paper analyzes biodiversity and food web time series from riverine fish communities to show how biodiversity loss affects food web structure and redundancy.

Hungry catfish - effect of prey availability on movement dynamics of a top predator

This study examines how prey availability affects the movement, activity, and growth of European catfish in different aquatic environments.

Larger fish in the headwaters: testing the drivers of longitudinal distribution in streams

The paper investigates factors driving the 'larger fish upstream pattern' in a South American stream, finding upstream distance and food availability as key drivers for four species.

Monitoring for fisheries or for fish? Declines in monitoring of salmon spawners continue despite a conservation crisis

The paper examines declining salmon spawner monitoring in Pacific Canada, finding reduced data collection despite conservation needs and linking monitoring to commercial fisheries interests.

RARE HABITATS, RARE SPECIES, AND INVASIVE PREDATORS HIGHLIGHT MANAGEMENT COMPLEXITIES IN THE COLORADO RIVER SYSTEM

The paper assesses the impact of non-native Smallmouth Bass invasion on native species in the Colorado River system and evaluates management options for a rare salamander population.

Characterizing the impacts of exotic species on the morphology of solitary threespine stickleback (Gasterosteus aculeatus) populations in southwestern British Columbia

The paper examines how different combinations of exotic species affect the morphology of threespine stickleback populations over time.

Cascading consequences of shifting ice phenology in an exploited lake

The paper examines how shifting ice phenology in Lake Simcoe affects food web dynamics through changes in thermal profiles and limnological properties over time.

Introduced trout hinder the recovery of native fish following an extreme flood disturbance

This study examines how introduced trout affect the recovery of native galaxiid fish populations after extreme flooding, finding that trout reduce growth rates and impact smaller fish more severely.

Test of a conservation intervention highlights temporal variability in hybridization dynamics in Catostomus fishes

This study tests a fish barrier's effectiveness in reducing non-native sucker hybridization by analyzing genomic data from larval fish over four years.