A5032722064- Fish Ecology and Management Studies
- Aquatic Invertebrate Ecology and Behavior
- Fish Biology and Ecology Studies
- Hydrology and Sediment Transport Processes
- Genetic diversity and population structure
- Wildlife Ecology and Conservation
- Turtle Biology and Conservation
- Genetic and phenotypic traits in livestock
- Environmental DNA in Biodiversity Studies
- Water Quality and Resources Studies
- Marine and fisheries research
- Ecology and biodiversity studies
- Amphibian and Reptile Biology
- Fish biology, ecology, and behavior
- Avian ecology and behavior
- Aquaculture disease management and microbiota
- Soil and Water Nutrient Dynamics
- Species Distribution and Climate Change
- Freshwater macroinvertebrate diversity and ecology
- Identification and Quantification in Food
- Isotope Analysis in Ecology
- Reproductive biology and impacts on aquatic species
- Conservation, Ecology, Wildlife Education
- Wildlife-Road Interactions and Conservation
- Mercury impact and mitigation studies
Ministry of Natural Resources and Forestry
2015-2024
Trent University
2014-2022
Ministry of Energy, Northern Development and Mines
2021
Carleton University
2013
Battelle
2013
Fisheries and Oceans Canada
2013
Nonprofit Assistance Center
2011
Harvard University
1998-2000
Systematic meta-analyses were conducted on the ecological impacts of water management, including effects (i) dewatering macroinvertebrates, (ii) a hypolimnetic release downstream aquatic fish and macro invertebrate communities, (iii) flow modification fluvial habitat generalists. Our meta-analysis indicates, in general, that macroinvertebrate abundance is lower zones or areas have been dewatered as result fluctuations low flows (overall effect size, –1.64; 95% confidence intervals (CIs),...
Lake Sturgeon is a potamodromous, fluvial-dependent species from the family Acipenseridae, and one of largest freshwater fishes within its North American range extending to Great lakes, Mississippi River, Hudson Bay drainages. Like almost all other sturgeon species, populations throughout suffered mass declines or extirpation in late 1800s into early 1900s, due extensive overexploitation habitat loss alteration. However, are still present low high densities their native primarily factors...
Chelydra serpentina, in central Ontario during
ESR Endangered Species Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 31:203-210 (2016) - DOI: https://doi.org/10.3354/esr00767 REVIEW A global perspective of fragmentation on a declining taxon—the sturgeon (Acipenseriformes) Tim J. Haxton1,*, M. Cano2 1Aquatic and Monitoring Section, Ontario Ministry Natural Resources Forestry, 1600 West Bank Dr., Peterborough, ON K9L 0G2, Canada...
Microbial communities are found throughout the biosphere, from human guts to glaciers, soil activated sludge. Understanding statistical properties of such diverse can pave way elucidate common mechanisms ...Multiple ecological forces act together shape composition microbial communities. Phyloecology approaches—which combine phylogenetic relationships between species with community ecology—have potential disentangle but often ...
Lake sturgeon (Acipenser fulvescens) stocks are well below historical levels across their natural range. In this study, we examine why lake have not substantially recovered to in a large regulated river (Ottawa River, Canada). Three primary anthropogenic stressors been identified as potentially limiting populations the Ottawa River: (i) commercial harvest, (ii) contaminants, and (iii) water power management. Hypotheses i iii were tested by comparing abundance examining growth among reaches...
Abstract Although bycatch is well known and studied in marine fisheries, comparatively little about freshwater fisheries. Even basic information on composition mortality unavailable, given that few inland jurisdictions require reporting of bycatch. A small‐scale hoop net fishery targets pan fish (e.g. sunfish, L epomis spp.) operates primarily the spring fall was simulated two lakes south‐eastern O ntario to characterize both mortality. We fished one lake compare catch rates, while other we...
Historical abundance and biomasss of lake sturgeon (Acipenser fulvescens Rafinesque, 1817) in the Great Lakes were estimated from historical commercial harvest data 1879 to 1920 using two modeling techniques: a surplus production model with Bayesian approach, depletion model. In addition, theoretical sustainable levels exploitation temporal recovery periods based on The biomass Lake Sturgeon during period 1885 varied for each ranged 313 900 6 473 000 kg (0.5–16.7 ha−1) 968 25 414 (2.4–31.7...
Variation in life‐history traits (growth, condition, mortality and recruitment) relative abundance of 11 large‐bodied fish species was investigated among three water‐management regimes (unimpounded, run‐of‐the‐river winter reservoirs) the large regulated Ottawa River, Canada. If waterpower management had an effect on fishes, then (1) would be expected community structuring (2) with similar should affected a manner. Large‐bodied communities were assessed using two different standard...
Lake sturgeon are considered imperilled across much of their range where rehabilitation efforts have been employed to enhance recovery. Habitat requirements not known for all life stages lake sturgeon, especially the juvenile stage. Juvenile can be important in assessing effectiveness and therefore history this stage is important. The objectives study were determine if within Ottawa River, Canada has a depth preference; so, selectivity was function body length; finally, spatial structuring...
Abstract The presence of hydroelectric power generating facilities has been identified as the primary factor affecting variation in relative abundance Lake Sturgeon Acipenser fulvescens rivers across Ontario. Qualitatively, these are known to have impacts on aquatic environment, and they can be inferred effects Sturgeon; however, few studies quantifying available. Our objectives were (1) determine compare magnitude effect ( d ) facility operating regimes abundance; (2) biological responses...
Sturgeon and paddlefish were historically the dominant large fishes in all major Northern American Rivers. All ten species have been affected past 150 years from anthropogenic stressors such that they are considered imperiled by various jurisdictions. Status papers presented for each as part of a special publication on North Acipenseriformes. The objective this paper is to provide summary similarities differences life history, habitat requirements, among species. Optimistically, would...
Hydroelectric facilities can dramatically alter the quantity and quality of fish habitat; however it is not well known how these habitat changes affect growth life history fish. We examine slimy sculpin (Cottus cognatus), a small-bodied sedentary, benthic stream fish, in two regulated eight unregulated tributaries Lake Superior, Canada. Among rivers, we found that grew faster Magpie River than nearby systems, whereas Michipicoten was intermediate. Sculpin were also better condition natural...
Abstract Aim Migratory freshwater fishes are those that must access discrete habitats to complete their life cycles. Freshwater fish migrations occur around the world and provide numerous ecosystem services for humans natural systems; however, many migratory species in decline globally. A limiting factor successfully conserve is histories of unknown or only partially described. To researchers with critical comprehensive information fishes, we developed North American Fish Database (NAFMFD)....
The objectives of this study were to (i) assess the variation in relative abundance lake sturgeon (Acipenser fulvescens Rafinesque, 1817) subjected various man-induced stresses and physical characteristics at a landscape scale across Ontario; (ii) ascertain factors that explain variability observed among rivers using multivariate approach. A standardized index netting program targeting juvenile adult Lake Sturgeon was conducted over two field seasons 22 river sites Ontario. Each had unique...
With increasing human use of North American inland lakes for recreational purposes, there is a greater probability the incidental transfer and introduction aquatic invasive species within them. This raises concern over potential ecological economic impacts that could have in these highly valued freshwater ecosystems. In this study, we focus our interests on 63 distributed across Southern Ontario landscape order to evaluate whether concerns are warranted adverse well-known (the zebra mussel...
An increased electrofishing sampling effort will increase detection probabilities of riverine fishes. In this study, a repeat-sampling approach was used in small to medium-sized Ontario (Canada) rivers estimate: (i) species-specific freshwater fishes, (ii) the number events required confidently detect species, and (iii) power timed-search surveys future distribution (or occupancy) declines. Wadeable habitats at 36 sites were sampled with backpack electrofisher on four separate dates during...
Sustainable management of exploited and endangered species is facilitated by knowledge their geographic genetic structure. Lake sturgeon (Acipenser fulvescens) epitomizes both categories, but information has largely been limited to the Laurentian Great Lakes basin. We assessed hierarchical structure lake across Canadian range using a variation at 14 microsatellite loci. Observed patterns showed evidence two ancestral groups which originated from Mississippian Missourian glacial refugia....
Abstract Although many fish habitat suitability models (HSMs) have been developed and used in wildlife management conservation planning, comparatively few independently validated. Given the importance of such policy, extent to which they accurately predict population parameters (e.g., abundance or recruitment) is a critical issue. Here we apply an HSM recently for lake sturgeon Acipenser fulvescens northern rivers three reaches Ottawa River, using measurements model's key variables...
Abstract Few comparative studies exist on the sympatric populations of Saugers Sander canadensis and Walleyes S. vitreus , especially in northern rivers. Depth‐stratified, standardized index netting surveys were conducted Ottawa River, Canada—a large, fragmented river. The objectives this study to (1) determine whether spatially segregated within river reaches; (2) assess relative abundances two species correlated reaches ascertain factors affecting their abundances; (3) life history...