William M. Twardek
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View article: Hydropower Effluent as a Marine Pollutant; Impacts of River Regulation on Estuarine and Coastal Ecology
Hydropower Effluent as a Marine Pollutant; Impacts of River Regulation on Estuarine and Coastal Ecology Open
The confluence of rivers with the ocean creates biological hotspots where temperature, salinity, and nutrients mix to provide excellent conditions for rearing, growth, and refuge to a multitude of organisms. Worldwide, estuaries are highly…
View article: Passage efficiency and behavioral performance of Schizothorax davidi through different sections of a long vertical slot fishway
Passage efficiency and behavioral performance of Schizothorax davidi through different sections of a long vertical slot fishway Open
View article: Freshwater fish sanctuaries provide benefits for riparian wildlife
Freshwater fish sanctuaries provide benefits for riparian wildlife Open
Benefits to wildlife communities stemming from the protection of a single species have been documented in terrestrial and marine systems but remain understudied within the context of freshwater‐protected areas (FPAs). We used five long‐sta…
View article: A policy scan related to assisted migration as a climate change adaptation tactic in Canada reveals major policy gaps
A policy scan related to assisted migration as a climate change adaptation tactic in Canada reveals major policy gaps Open
Assisted migration is increasingly being considered as a potential climate change adaptation tactic even though it also comes with potential risk to ecosystems and society. When implementing conservation actions that involve risk, it is pr…
View article: Electronic tagging and tracking aquatic animals to understand a world increasingly shaped by a changing climate and extreme weather events
Electronic tagging and tracking aquatic animals to understand a world increasingly shaped by a changing climate and extreme weather events Open
Despite great promise for understanding the impacts and extent of climate change and extreme weather events on aquatic animals, their species, and ecological communities, it is surprising that electronic tagging and tracking tools, like bi…
View article: Shyer fish are superior swimmers in Siberian sturgeon (Acipenser baerii)
Shyer fish are superior swimmers in Siberian sturgeon (Acipenser baerii) Open
Differences in individual personality are common amongst animals, which can play an ecological and evolutionary role given links to fitness. Personality affects animal life processes and outputs (e.g., behavior, life history, growth, survi…
View article: Shyer fish are superior swimmers in Siberian sturgeon (Acipenser baerii)
Shyer fish are superior swimmers in Siberian sturgeon (Acipenser baerii) Open
Differences in individual personality are common amongst animals, which can play an ecological and evolutionary role given links to fitness. Personality affects animal life processes and outputs (e.g., behavior, life history, growth, survi…
View article: The movement ecology of fishes
The movement ecology of fishes Open
Movement of fishes in the aquatic realm is fundamental to their ecology and survival. Movement can be driven by a variety of biological, physiological and environmental factors occurring across all spatial and temporal scales. The intrinsi…
View article: On the relevance of animal behavior to the management and conservation of fishes and fisheries
On the relevance of animal behavior to the management and conservation of fishes and fisheries Open
View article: Digital fisheries data in the Internet age: Emerging tools for research and monitoring using online data in recreational fisheries
Digital fisheries data in the Internet age: Emerging tools for research and monitoring using online data in recreational fisheries Open
Recreational fisheries are diverse in scale, scope, and participation worldwide, constituting an important ecosystem service of marine and freshwater ecosystems. Management of these socio‐ecological systems is challenged by monitoring gaps…
View article: Our failure to protect the stream and its valley: A call to back off from riparian development
Our failure to protect the stream and its valley: A call to back off from riparian development Open
Freshwater Science, volume 41, number 2, June 2022. © 2022 The Society for Freshwater Science. All rights reserved. Published by The University of Chicago Press for the Society for Freshwater Science. https://doi.org/10.1086/719958
View article: Bright spots for inland fish and fisheries to guide future hydropower development
Bright spots for inland fish and fisheries to guide future hydropower development Open
View article: Evaluating the Consequences of Physical Barriers on Fish During Long-distance Upstream Migrations Through Rivers
Evaluating the Consequences of Physical Barriers on Fish During Long-distance Upstream Migrations Through Rivers Open
Migration allows animals to exploit conditions across distinct habitats to maximize their potential fitness. These movements are dependent on connectivity between habitats that make it possible for animals to move unencumbered. In freshwat…
View article: A synoptic history of the development, production and environmental oversight of hydropower in Brazil, Canada, and Norway
A synoptic history of the development, production and environmental oversight of hydropower in Brazil, Canada, and Norway Open
View article: Field assessments of heart rate dynamics during spawning migration of wild and hatchery-reared Chinook salmon
Field assessments of heart rate dynamics during spawning migration of wild and hatchery-reared Chinook salmon Open
During spawning, adult Pacific salmonids ( Oncorhynchus spp . ) complete challenging upriver migrations during which energy and oxygen delivery must be partitioned into activities such as locomotion, maturation and spawning behaviours unde…
View article: Mobilizing practitioners to support the Emergency Recovery Plan for freshwater biodiversity
Mobilizing practitioners to support the Emergency Recovery Plan for freshwater biodiversity Open
Freshwater biodiversity loss is one of the greatest environmental threats in our changing world. Although declines have been reported extensively in the literature, much less attention has been devoted to solving the freshwater biodiversit…
View article: Technological innovations in the recreational fishing sector: implications for fisheries management and policy
Technological innovations in the recreational fishing sector: implications for fisheries management and policy Open
View article: R_Code_Submission.Rmd from Field assessments of heart rate dynamics during spawning migration of wild and hatchery-reared Chinook salmon
R_Code_Submission.Rmd from Field assessments of heart rate dynamics during spawning migration of wild and hatchery-reared Chinook salmon Open
During spawning, adult Pacific salmonids (Oncorhynchus spp.) complete challenging upriver migrations during which energy and oxygen delivery must be partitioned into activities such as locomotion, maturation and spawning behaviours …
View article: Additional meta-data on Chinook salmon for R Code from Field assessments of heart rate dynamics during spawning migration of wild and hatchery-reared Chinook salmon
Additional meta-data on Chinook salmon for R Code from Field assessments of heart rate dynamics during spawning migration of wild and hatchery-reared Chinook salmon Open
Additional meta-data on Chinook salmon for R Code
View article: Processed Chinook salmon heart rate data from Field assessments of heart rate dynamics during spawning migration of wild and hatchery-reared Chinook salmon
Processed Chinook salmon heart rate data from Field assessments of heart rate dynamics during spawning migration of wild and hatchery-reared Chinook salmon Open
Processed Chinook salmon heart rate and meta data from the Sydenham River, Ontario
View article: Shapefile of Sydenham River from Field assessments of heart rate dynamics during spawning migration of wild and hatchery-reared Chinook salmon
Shapefile of Sydenham River from Field assessments of heart rate dynamics during spawning migration of wild and hatchery-reared Chinook salmon Open
Shapefile of Sydenham River
View article: R Code for heart rate analysis of Sydenham River Chinook salmon data from Field assessments of heart rate dynamics during spawning migration of wild and hatchery-reared Chinook salmon
R Code for heart rate analysis of Sydenham River Chinook salmon data from Field assessments of heart rate dynamics during spawning migration of wild and hatchery-reared Chinook salmon Open
R Code for heart rate analysis of Sydenham River Chinook salmon data
View article: A global perspective on the influence of the COVID-19 pandemic on freshwater fish biodiversity
A global perspective on the influence of the COVID-19 pandemic on freshwater fish biodiversity Open
View article: The Living Planet Index (LPI) for migratory freshwater fish : Technical Report
The Living Planet Index (LPI) for migratory freshwater fish : Technical Report Open
Migratory freshwater fish (i.e. fish that use freshwater systems, either partly or exclusively) occur around the world and travel between critical habitats to complete their life cycle. They are disproportionately threatened compared to ot…
View article: Searching for responsible and sustainable recreational fisheries in the Anthropocene
Searching for responsible and sustainable recreational fisheries in the Anthropocene Open
Recreational fisheries that use rod and reel ( i.e ., angling) operate around the globe in diverse freshwater and marine habitats, targeting many different gamefish species and engaging at least 220 million participants. The motivations fo…
View article: "Guide to the Parasites of Fishes of Canada Part V: Nematoda" by Hisao P. Arai and John W. Smith. Edited by Michael D.B. Burt and Donald F. McAlpine, 2016. [book review]
"Guide to the Parasites of Fishes of Canada Part V: Nematoda" by Hisao P. Arai and John W. Smith. Edited by Michael D.B. Burt and Donald F. McAlpine, 2016. [book review] Open
View article: OUP accepted manuscript
OUP accepted manuscript Open
Anadromous fishes such as steelhead trout, Oncorhynchus mykiss, are exposed to a suite of infectious agents and migratory challenges during their freshwater migrations. We assessed infectious agent load and richness and immune syste…
View article: Observations of Mudpuppy (<i>Necturus maculosus</i>) bycatch in a recreational ice fishery in northern Ontario
Observations of Mudpuppy (<i>Necturus maculosus</i>) bycatch in a recreational ice fishery in northern Ontario Open
Bycatch in fisheries is a well-explored topic, although less so in recreational fisheries. We encountered frequent bycatch of Mudpuppy (Necturus maculosus), a neotenic aquatic salamander that is active in winter, in passively baited ice-fi…
View article: Natural and Anthropogenic Factors Influencing the Pre-Spawn Migration of Steelhead Trout
Natural and Anthropogenic Factors Influencing the Pre-Spawn Migration of Steelhead Trout Open
Migration can result in considerable exposure to both natural and anthropogenic stressors that can impact the ability of an anadromous fish to complete this critical component of their life-history. In this thesis I use a range of physiolo…
View article: Fido, Fluffy, and wildlife conservation: The environmental consequences of domesticated animals
Fido, Fluffy, and wildlife conservation: The environmental consequences of domesticated animals Open
Humans have created a strong relationship with cats and dogs by domesticating them. Whether owned by a human or living feral, modern domestic cats and dogs interact extensively with people and the environment. The negative interactions bet…