A5012408022- Physiological and biochemical adaptations
- Aquaculture Nutrition and Growth
- Fish Ecology and Management Studies
- Aquaculture disease management and microbiota
- Reproductive biology and impacts on aquatic species
- Ocean Acidification Effects and Responses
- Ichthyology and Marine Biology
- Ecology, Conservation, and Geographical Studies
- Insect and Pesticide Research
- Folklore, Mythology, and Literature Studies
- Impact of Light on Environment and Health
- Green IT and Sustainability
- Marine Bivalve and Aquaculture Studies
- Renin-Angiotensin System Studies
- Fish Biology and Ecology Studies
- Reproductive Health and Contraception
University of Winnipeg
2024-2025
Bamfield Marine Sciences Centre
2021-2024
University of Manitoba
2020-2024
Abstract Temperature is one of the most important abiotic factors regulating development and biological processes in ectotherms. By 2050, climate change may result temperature increases 2.1–3.4°C Manitoba, Canada. Lake sturgeon, Acipenser fulvescens, from both northern southern populations Manitoba were acclimated to 16, 20 24°C for 30 days, after which critical thermal maximum (CTmax) trials conducted investigate their plasticity. We also examined effects on morphological physiological...
Climate change has many effects on aquatic environments, including changes in temperature and chemicals the water. One chemical, carbon dioxide (CO2), is discussed a lot among scientists because it big impact how acidic water (pH, or number of hydrogen molecules water). More CO2 makes more acidic, which can cause problems for animals plants. Many adult handle acidity, but earlier stages life (e.g. eggs, larvae) such as fish might not tolerate even small increases acidity. This eggs larvae do...
Chronic exposure to high temperatures may leave freshwater fishes vulnerable opportunistic pathogens, particularly during early life stages. Lake sturgeon, Acipenser fulvescens, populations within the northern expanse of their range in Manitoba, Canada, be susceptible temperature stress and pathogenic infection. We acclimated developing lake sturgeon for 22 days two ecologically relevant, summer (16 20°C). Individuals from both acclimation treatments were then exposed 0, 30 60 µg ml-1...
The increasing frequency and duration of marine heatwaves attributed to climate change threatens coastal elasmobranchs may exacerbate existing anthropogenic stressors. While the elasmobranch stress response has been well studied, role unique corticosteroid-1α-hydroxycorticosterone (1α-OHB)-in energy balance is not understood. Therefore, 1α-OHB's utility as a biomarker in conservation physiology equivocal. Here, we analyse roles corticosteroids, 1α-OHB corticosterone, metabolites, glucose...
We describe a viable liver perfusion in shark species for the first time as determined by oxygen consumption and hormone-mediated changes hemodynamics (angiotensin II, ANG II). In addition, removal of major energy metabolites confirms hepatic ketone [3-hydroxybutyrate (3-HB)] production an elasmobranch liver. Perfusion with heterologous insulin homologous glucagon did not cause glucose balance, however, possibly demonstrating differences metabolism this taxon compared more derived vertebrates.
Abstract Lake Sturgeon Acipenser fulvescens , once widespread throughout North America, are now considered endangered in much of their natural range. However, recreational catch‐and‐release (C&R) fisheries targeting the have developed areas with strong populations. Here, we evaluated physiological and behavioral impairment after C&R angling. Fish were angled from Winnipeg River transferred to a holding pen recover facilitate serial sampling Measured traits included blood osmolality,...
Parents shape the lives of their children in countless ways. Even before we are born, genetics and environment our parents build foundation future. That said, additional stress that experience during reproduction may influence next generation offspring. One event uniquely impacts fish is catch-and-release angling – a conservation technique encourages recreational fishing while maintaining productive populations. The idea many species can recover from exercise, air exposure potential injury;...
Do you ever have a hard time falling asleep if there is light streaming into your bedroom, which cannot block out? You could say that biological sleep cycles are disrupted by uninvited light. The same thing happens to animals and plants, particularly as artificial pollution at night (e.g. city glow, streetlamps etc.) has been increasing since the 19th century. Lots of living things use natural cue for activity, such feeding mating. In addition, some usually active during day now becoming...
Abstract Atmospheric CO 2 and temperature are rising concurrently, may have profound impacts on the transcriptional, physiological behavioural responses of aquatic organisms. Further, spring snowmelt cause transient increases p in many freshwater systems. We examined behavioural, transcriptomic an ancient fish, lake sturgeon ( Acipenser fulvescens ) to projected levels warming during its most vulnerable period life, first year. Specifically, larval fish were raised either low (16°C) or high...
Have you ever wondered why feel hungry, or suddenly crave more sleep? The answer is in part because of tiny messengers called hormones. Hormones are inside all living things and communicate messages, such as how fast a thing growing, when animals awake to prepare for pregnancy. Pregnancy very sensitive hormone changes scientists can figure out which stage pregnancy at by measuring the levels certain hormones, progesterone, estrogen testosterone, animals' bodies. However, have tried infer...
Sharks are collected from the wild as live specimens for display in aquariums and use research. The methods by which sharks captured transported can be associated with sub-lethal physiological outcomes or even mortality, requires evaluation to determine optimal collection transport a given species. present study evaluated primary (i.e., endocrine) secondary biochemical) stress responses mortality Pacific spiny dogfish ( Squalus suckleyi) following capture subsequent between experimental...
Leopard sharks (
Hormones are signals that help control body functions, such as stress or pregnancy. Different hormones responsible for different aspects of physiology. For example, in humans and many other mammals, the hormone cortisol is released during testosterone progesterone function fertility. These usually travel around blood, but also can be deposited hair, feathers nails animals, which tell story about what has happened animal's body, sometimes several years past. One way to explore stories us...
Abstract Atmospheric CO 2 and temperature are rising concurrently, may have profound impacts on the transcriptional, physiological, behavioral responses of aquatic organisms. Further, spring snow melt cause transient increases p in freshwater systems. Lake sturgeon ( Acipenser fulvescens ) groups were raised current projected levels warming . Following an overwintering period, lake exposed to a increase , simulating melt. Diverging transcriptional patterns found each group metabolic rate was...