Article
Physiology
Vasilis Z. Marmarelis, Dae C. Shin, Jason W. Hamner, Can Ozan Tan
Summary: This study investigates the dynamic effects of cholinergic blockade on cerebral flow autoregulation in response to changes in blood pressure and CO2 concentration in healthy adults. The results demonstrate that the changes in cholinergic mechanism result in resonant peaks at specific frequencies, as reflected by the changes in the kernel functions.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Fisheries
M. Camino Ordas, Lucia Gonzalez-Torres, Paula Arense, Rebecca Heavyside, Carlos Zarza, Carolina Tafalla
Summary: This study investigated the effects of beta-glucans on rainbow trout using the RTS11 and RTgutGC cell lines. The results showed that RTS11 monocytes/macrophages were more reactive to beta-glucans, while beta-glucans also had immunostimulatory effects on gut epithelial cells. Additionally, beta-glucans were found to induce tolerance in both cell lines, with only interleukin 6 transcription significantly lower in cells previously exposed to beta-glucans.
Article
Biodiversity Conservation
Nicholas Strowbridge, Sara L. Northrup, Madison L. Earhart, Tessa S. Blanchard, Patricia M. Schulte
Summary: The study reveals significant variation in the tolerance of rainbow trout to acute exposure to high temperature and low oxygen stressors, both within and among strains. However, differences in resilience to climate change-relevant stressors among strains were relatively small, while post-trial mortality varied greatly. Individual tolerance to thermal stressors was weakly correlated with tolerance to hypoxia, suggesting that different metrics of tolerance may lead to different conclusions regarding resilience to climate change.
CONSERVATION PHYSIOLOGY
(2021)
Article
Fisheries
Emily R. Lechner, Erin M. C. Stewart, Chris C. Wilson, Graham D. Raby
Summary: This study examined the impact of thermal acclimation on thermal tolerance in brook trout embryos. The results showed that warm acclimation can increase the upper thermal tolerance of the embryos, although the variability of CTmax was higher than typical for other salmonids.
JOURNAL OF FISH BIOLOGY
(2023)
Article
Fisheries
Abigail B. Bockus, Steven D. Rawles, Wendy M. Sealey, Zachariah B. Conley, T. Gibson Gaylord
Summary: The study found that rainbow trout exhibited increased growth and feed intake but decreased feed efficiency at 18 degrees Celsius, while Thermal Care was beneficial for growth at 15 degrees Celsius. However, Grobiotic A impacted acid-base balance and its relevance remains to be determined.
Article
Ecology
Chung-Te Cheng, Ming-Feng Chuang, Takashi Haramura, Chaun-Bin Cheng, Ye Inn Kim, Amael Borzee, Chi-Shiun Wu, Yi-Huey Chen, Yikweon Jang, Nicholas C. Wu, Yeong-Choy Kam
Summary: Global warming and deforestation are pushing species closer to their physiological limit, especially for species with habitat-restricted life stages. The study examined the warming tolerance of larvae from 29 anuran species across a latitudinal gradient to test how latitude and habitat type affected vulnerability to climate change. The results showed that deforestation will exacerbate the effects of climate warming on warming tolerance, making species with range-restricted life stages more vulnerable to anthropogenic change.
GLOBAL ECOLOGY AND BIOGEOGRAPHY
(2023)
Review
Physiology
Julia Shanks, Stian Thomson, Rohit Ramchandra
Summary: This review discusses how non-adrenergic, non-cholinergic neural mechanisms regulate coronary artery blood flow.
EXPERIMENTAL PHYSIOLOGY
(2023)
Article
Biology
Vladislav Kuzmin, Konstantin S. Ushenin, Irina V. Dzhumaniiazova, Denis Abramochkin, Matti Vornanen
Summary: This study investigates the role of the atrioventricular (AV) canal in high temperature-induced heart failure in fish. The results show that the AV canal is resistant to high temperatures and high external K+ concentrations, but it is unable to trigger ventricular excitation when both temperature and external K+ concentration are elevated. This finding sheds light on the mechanism of bradycardia at high temperatures in fish.
JOURNAL OF THERMAL BIOLOGY
(2022)
Article
Multidisciplinary Sciences
Masahiro Okada, Kosuke Okada, Masayuki Kakehashi
Summary: Based on the analysis of data from 53 young women, this study found that masticatory function is associated with nervous function and eating habit patterns. High occlusal force is related to an increased high-frequency component of heart rate variability, and eating habit patterns are also associated with occlusal force and heart rate variability. Therefore, eating habits may simultaneously affect masticatory function, nervous system development, and cardiovascular rhythm.
Article
Biochemistry & Molecular Biology
Tilo Pfalzgraff, Ivar Lund, Peter Vilhelm Skov
Summary: The chronic elevation of circulating cortisol has been shown to have deleterious effects on fish, with high doses significantly affecting metabolic rates. However, medium doses of cortisol can increase maximum metabolic rates without significant impact on standard metabolic rates. Furthermore, the higher metabolic rates in the high cortisol group may be due to increased oxygen demands of specific tissues.
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY
(2022)
Article
Ecology
Dana R. Warren, David A. Roon, Allison G. Swartz, Kevin D. Bladon
Summary: This study examines the impacts of climate change and abrupt disturbances such as wildfires on native salmonid fishes. It is found that wildfires can lead to substantial increases in stream temperature, yet populations of cold-water fishes are able to persist despite the drastic changes, with unclear mechanisms requiring further investigation.
Article
Ecology
Lauren B. Buckley, Raymond B. Huey, Joel G. Kingsolver
Summary: Understanding the thermal sensitivity of organisms is crucial for predicting the biological consequences of climate change. The commonly used approach of estimating thermal safety margins may not fully capture the performance of organisms at different body temperatures. This study finds that the asymmetry of thermal performance curves has important implications for thermal stress and performance decrement. Metrics that incorporate additional aspects of thermal performance curve shape provide a better measure of the thermal risk of climate change.
GLOBAL ECOLOGY AND BIOGEOGRAPHY
(2022)
Article
Fisheries
Kevin B. Rogers, Brendon J. Sucher, Brian W. Hodge, Christopher A. Myrick
Summary: This study evaluated the thermal tolerance of cutthroat trout fry from five populations and found significant differences in critical thermal maxima among populations and no significant differences in ultimate upper incipient lethal temperatures. Furthermore, adding a third-order term for temperature can improve model fit and reveal substantial differences in optimal growth temperatures.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2022)
Article
Food Science & Technology
Donglei Luan, Shu Li, Yajing Wang, Yifen Wang
Summary: The aim of this study was to investigate the impact of microwave non-thermal effects on thermal sensitive amino acids in rainbow trout fillets. A Double Side Approximating Method (DSAM) was developed to distinguish non-thermal effects from thermal effects. The results showed that microwave non-thermal effects increased the quantity of most amino acids while reducing the content of Lys and Hyp.
FOOD RESEARCH INTERNATIONAL
(2023)
Article
Fisheries
Kevin B. Rogers, Brendon J. Sucherb, Brian W. Hodge, Christopher A. Myrick
Summary: As temperatures rise in the southern Rocky Mountains, the ability of native fishes to tolerate stream warming becomes a concern. In this study, the thermal tolerance of cutthroat trout fry from five populations was evaluated, showing differences in critical thermal maxima (CTMs) among populations but not in ultimate upper incipient lethal temperatures (UUILTs). Adding a third-order temperature term improved model fit and revealed significant differences in optimal growth temperatures. This knowledge can help predict the consequences of climate change, identify suitable habitats for repatriation, and inform water quality temperature standards.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2022)
Article
Behavioral Sciences
Jeff C. Clements, Kirti Ramesh, Jacob Nysveen, Sam Dupont, Fredrik Jutfelt
Summary: The study found that the time to open of mussels is related to their vulnerability to predation and is affected by temperature, with higher temperatures increasing the time to open. The pH levels had no significant effect on the time to open. Time to open was highly repeatable in the short term and decreased linearly across trials.
Article
Behavioral Sciences
Tommy Norin, Josefin Sundin, Rachael Morgan, Anna H. Andreassen, Mirjam Amcoff, Ben Speers-Roesch, Fredrik Jutfelt, Sandra A. Binning, Dominique G. Roche, Timothy D. Clark
Summary: This study investigates whether prey fish deliberately reduce food intake when a predator is present in order to preserve sufficient physiological capacity for avoiding potential attacks, in addition to the energetically costly process of digestion. The results show that while prey fish reduce activity levels in the presence of predators, they appear to habituate quickly to their presence and do not reduce food consumption. However, predator-exposed fish show more consistency in daily food intake, indicating that they may still be mindful of protecting their aerobic capacity under predation risk.
BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY
(2021)
Article
Psychology, Biological
Jeff C. Clements, Sam Dupont, Fredrik Jutfelt
Summary: Green sea urchins are dominant components of benthic ecosystems and can actively prey on known predators such as sea stars. Observations reveal that urchins attack sea stars by mounting and consuming their arms, a predatory behavior known as urchin pinning. This study provides detailed behavioral documentation of urchins actively preying on a known predator, paving the way for future research in this area.
Article
Ecology
Fredrik Jutfelt, Tommy Norin, Eirik R. Asheim, Lauren E. Rowsey, Anna H. Andreassen, Rachael Morgan, Timothy D. Clark, Ben Speers-Roesch
Summary: The research proposes a hypothesis about water-breathing ectothermic animals, suggesting that they regulate peak specific dynamic action response during times of warming by reducing meal sizes to protect postprandial residual aerobic scope, leading to reductions in growth.
FUNCTIONAL ECOLOGY
(2021)
Article
Ecology
Ines Castejon-Silvo, Jorge Terrados, Thanh Nguyen, Fredrik Jutfelt, Eduardo Infantes
Summary: The loss of seagrass beds increases water current velocity, impacting pipefish energy expenditure. Seagrass can reduce flow velocities, increasing pipefish tolerance. Some species show high dependence on seagrass shelter, while others are more resilient to vegetation changes. Increased energy expenditure is a significant impact on fishes as coastal habitats continue to decline.
FUNCTIONAL ECOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Jeff Clements, Josefin Sundin, Timothy Clark, Fredrik Jutfelt
Summary: A systematic review and meta-analysis of 91 studies on the effects of ocean acidification on fish behavior revealed a decline effect, where the large effects observed in initial studies have diminished in subsequent studies over the past decade. This decline effect cannot be explained by biological factors, and studies with large effect sizes tend to have low sample sizes and are published in high-impact journals.
Article
Biology
Dominique G. Roche, Graham D. Raby, Tommy Norin, Rasmus Ern, Hanna Scheuffele, Michael Skeeles, Rachael Morgan, Anna H. Andreassen, Jeff C. Clements, Sarahdghyn Louissaint, Fredrik Jutfelt, Timothy D. Clark, Sandra A. Binning
Summary: The study found that open data and code usage in experimental biology is still relatively low, but reproducible research practices are on the rise. Understanding the mechanisms of climate change impact on organisms and informing evidence-based conservation policies require rigorous empirical research.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2022)
Article
Multidisciplinary Sciences
Rachael Morgan, Anna H. Andreassen, Eirik R. Asheim, Mette H. Finnoen, Gunnar Dresler, Tore Brembu, Adrian Loh, Joanna J. Miest, Fredrik Jutfelt
Summary: Plasticity allows organisms to adapt to different environmental conditions, but the cost of plasticity and the trade-off between plasticity and performance under optimal conditions are still largely unknown. Zebrafish in the wild show high physiological plasticity due to large temperature fluctuations, while laboratory zebrafish, adapted to stable temperatures for over 150 generations, have reduced plasticity compared to their wild counterparts. Rapid selection for faster growth in the laboratory environment seems to have led to a trade-off against physiological plasticity in captive zebrafish.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Editorial Material
Biochemistry & Molecular Biology
Jeff C. Clements, Josefin Sundin, Timothy D. Clark, Fredrik Jutfelt
Review
Fisheries
Jessica E. Desforges, Kim Birnie-Gauvin, Fredrik Jutfelt, Kathleen M. Gilmour, Erika J. Eliason, Terra L. Dressler, David J. McKenzie, Amanda E. Bates, Michael J. Lawrence, Nann Fangue, Steven J. Cooke
Summary: The authors synthesized evidence to address methodological concerns and misconceptions surrounding the interpretation of critical thermal maximum (CTmax) in ecological and evolutionary studies of fishes. They highlighted the importance of considering factors that influence thermal limits when interpreting CTmax in ecological contexts. Applications of CTmax include mitigating the effects of climate change, informing infrastructure planning, and modeling species responses to temperature change. Future research directions aim to improve the application and interpretation of CTmax data in ecological contexts.
JOURNAL OF FISH BIOLOGY
(2023)
Review
Physiology
Rasmus Ern, Anna H. Andreassen, Fredrik Jutfelt
Summary: This review investigates the reasons behind fish heat failure at thermal extremes and the physiological mechanisms that determine acute upper thermal tolerance. The study proposes that rapid direct thermal impacts on fish are influenced by molecular mechanisms such as reaction rates, protein structure, and membrane fluidity. These molecular effects during acute warming lead to loss of equilibrium and death through different cellular, organ, and physiological pathways, including mitochondrial dysfunction, oxygen limitation, and impacted excitability of excitable cells. The study concludes that a single mechanism for acute upper thermal tolerance is not found across species and contexts, suggesting that the limiting mechanisms during acute warming differ between species, life stages, and recent thermal history. Future research is proposed to elucidate major patterns of physiological thermal limitations in fish.
Article
Biodiversity Conservation
Zara-Louise Cowan, Anna H. Andreassen, Jeremy De Bonville, Leon Green, Sandra A. Binning, Lorena Silva-Garay, Fredrik Jutfelt, Josefin Sundin
Summary: Aquatic ectotherms, particularly fish embryos, are sensitive to thermal stress. Critical thermal methodology, specifically critical thermal maximum (CTmax), is commonly used to characterize acute thermal tolerances in fishes. Measuring CTmax in fish embryos is challenging, but a novel method based on last movement has been proposed. This method allows for comparisons of acute thermal tolerance between species and life stages, and is more conservative and easier to record compared to measurements based on last heartbeat.
CONSERVATION PHYSIOLOGY
(2023)
Meeting Abstract
Fisheries
Jeff C. Clements, Kirti Ramesh, Jakob Nysveen, Sam Dupont, Fredrik Jutfelt, Carla Hicks, Rejean Tremblay, Luc A. Comeau
JOURNAL OF SHELLFISH RESEARCH
(2023)
Meeting Abstract
Physiology
A. H. Andreassen, P. Hall, P. Khatibzadeh, F. Jutfelt, F. Kermen
Article
Biodiversity Conservation
Hanna Scheuffele, Fredrik Jutfelt, Timothy D. Clark
Summary: Many ectotherms have shown a reduction in maximum body size in parallel with climate warming, with some fish species forecasted to decline by 14%-24% by 2050. Current research suggests that the decline in fish body size may be related to the gill-oxygen limitation hypothesis, but further investigation into other factors is needed.
CONSERVATION PHYSIOLOGY
(2021)
Article
Biology
Aref Maddahi, Adel Saberivand, Hossein Hamali, Farnoosh Jafarpour, Maryam Saberivand
Summary: Heat stress affects the fertility of dairy cattle, but supplementing vitamins E and coenzyme Q10 can alleviate its adverse effects on oocyte maturation and embryo development. Vitamin E was found to be more effective than vitamin C and coenzyme Q10 in improving maturation and cleavage rates, as well as increasing the count of blastocyst cells.
JOURNAL OF THERMAL BIOLOGY
(2024)