Article
Biochemistry & Molecular Biology
Jorge E. Aedo, Daniela Aravena-Canales, Rodrigo Zuloaga, Denisse Alegria, Juan A. Valdes, Alfredo Molina
Summary: Cortisol is a stress-related hormone that plays a key role in the physiological adjustments of fish, particularly in gill acclimatization to changes in salinity. It acts through specific intracellular glucocorticoid and mineralocorticoid receptors, but there is also evidence of membrane-initiated cortisol actions in fish. In this study, the researchers explored the contribution of rapid membrane-initiated cortisol to gene regulation in rainbow trout gills during salinity acclimation.
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY
(2023)
Article
Microbiology
Mei-Qun Chen, Yun Tian, Chi Zhang, Jian-She Zhou, Lhamo Tashi, Wan-Liang Wang, Hu Pan
Summary: In this study, a new rod-shaped bacterium named Deefgea salmonis sp. nov. was isolated from the gills of Oncorhynchus mykiss in Lhasa, Tibet Autonomous Region, PR China. Phylogenetic and genotypic analysis confirmed that this strain is a new species of the genus Deefgea.
ARCHIVES OF MICROBIOLOGY
(2022)
Article
Fisheries
Stefania M. Vannetti, James W. Wynne, Chloe English, Christine Huynh, Ralph Knusel, Carolina de Sales-Ribeiro, Maro Widmer, Gary Delalay, Heike Schmidt-Posthaus
Summary: Nodular gill disease (NGD) is an infectious condition that primarily affects freshwater salmonids, causing respiratory problems and mortality. This study describes the first reported cases of NGD with amoeba infection in farmed rainbow trout in Switzerland.
JOURNAL OF FISH DISEASES
(2023)
Article
Environmental Sciences
Ahmad Mohamadi Yalsuyi, Abdolmajid Hajimoradloo, Rasul Ghorbani, Vally-allah Jafari, Marko D. Prokic, Caterina Faggio
Summary: This study assessed how acute changes in water temperature and dissolved ammonia concentration can affect the swimming behavior pattern of rainbow trout. The results showed significant changes in swimming pattern due to these factors, with differences in swimming parameters between treated fish and the control group. The study confirmed that changes in fish swimming pattern in response to water physicochemical parameters can be a valuable tool in ecotoxicological studies.
ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY
(2021)
Article
Food Science & Technology
Yiwen Wu, Manman Zhao, Yuting Xia, Weiqing Sun, Guangquan Xiong, Liu Shi, Yu Qiao, Wenjing Wu, Anzi Ding, Lang Chen, Lan Wang, Sheng Chen
Summary: In order to study the deterioration of rainbow trout muscle quality caused by ammonia exposure, experiments with different concentrations of ammonia stress were conducted. The results showed that higher ammonia exposure led to increased bitterness and decreased umami and sweetness of the muscle, as well as decreased polyunsaturated fatty acids (PUFA) content. The expression of lipid metabolism-related genes was also affected, inhibiting lipid synthesis and promoting lipid oxidation. These findings are important for understanding the relationship between muscle quality, lipid metabolism, and environmental adaptability of rainbow trout (O. mykiss).
Article
Fisheries
Kubra Ak, Mert Minaz, Akif Er, Rahime Aslankoc
Summary: This study evaluated the effects of chamomile oil as an herbal anesthetic on rainbow trout, finding that chamomile oil at a concentration of 100 mu L/L has a lower adverse effect on fish health compared to other concentrations.
Article
Fisheries
Pajongjit Tongsri, Gaofeng Cheng, Zhenyu Huang, Zixuan Wang, Fen Dong, Zhengben Wu, Weiguang Kong, Yongyao Yu, Zhen Xu
Summary: This study found that IHNV infection can significantly alter the microbial community on the fish respiratory surface, triggering local antiviral and antibacterial mucosal immunity.
FISH & SHELLFISH IMMUNOLOGY
(2023)
Article
Fisheries
Lina Weirup, Carsten Schulz, Henrike Seibel, Johan Aerts
Summary: Suboptimal farm management can lead to chronic stress and external morphological damage in fish, especially in the fins. Factors related to management and water quality are associated with fin injuries and scale cortisol levels.
Article
Fisheries
Lu Zhao, Jinqiang Huang, Yongjuan Li, Shenji Wu, Yujun Kang
Summary: Rainbow trout is an economically important fish cultivated worldwide, but the outbreak of infectious hematopoietic necrosis virus (IHNV) hampers its farming industry and causes economic losses. This study identified numerous immune-related genes in the skin of rainbow trout infected with IHNV, providing insights into the innate immune system and laying a foundation for further research on disease resistance breeding.
AQUACULTURE INTERNATIONAL
(2023)
Article
Fisheries
Camilla Aniballi, Alberto Elmi, Martina Bertocchi, Albamaria Parmeggiani, Nadia Govoni, Maurizio Scozzoli, Domenico Ventrella, Maria Laura Bacci
Summary: This study assessed the effects of a natural-based complementary feed, Gill Fish (R), on the early stages of life of farmed rainbow trout (Oncorhynchus mykiss). The results demonstrated that the product had no harmful or stressful effects on the fish, indicating it could be a beneficial candidate for replacing chemicals in aquaculture.
Article
Veterinary Sciences
Elisa Fiordelmondo, Gian Enrico Magi, Adina Friedl, Mansour El-Matbouli, Alessandra Roncarati, Mona Saleh
Summary: The aim of this study was to investigate the physiological response of rainbow trout before slaughtering by analyzing skin mucus and plasma. The results showed that the procedures adopted after slaughtering only affected changes in plasma glucose and skin mucus activity in rainbow trout, indicating that the management protocol was compatible with non-stressful farming conditions.
FRONTIERS IN VETERINARY SCIENCE
(2023)
Article
Biology
Brittany Bard, Annette Dodge, William Joyce, Michael Lawrence, Steven J. Cooke, Kathleen M. Gilmour
Summary: Juvenile rainbow trout held in pairs form dominance hierarchies, leading to chronic social stress and potential elevation of cortisol levels, resulting in lowered thermal tolerance. However, social stress did not greatly affect cardiac structure or function in the trout.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2021)
Article
Physiology
Jorge E. Aedo, Rodrigo Zuloaga, Daniela Aravena-Canales, Alfredo Molina, Juan Antonio Valdes
Summary: Cortisol is a crucial regulator of neuroendocrine stress responses in teleost, acting through the modulation of glucocorticoid receptor (GR) and mineralocorticoid receptor (MR). A study using RNA-seq analysis explored the differential contribution of GR and MR in the global transcriptional response in teleost skeletal muscle. The findings highlighted the importance of understanding the role of these receptors in stress response.
FRONTIERS IN PHYSIOLOGY
(2023)
Article
Environmental Sciences
Kamran Shekh, Huzaifa Saeed, Vladimir Kodzhahinchev, Markus Brinkmann, Markus Hecker, Som Niyogi
Summary: Recent studies have shown that white sturgeon are more resistant to cadmium compared to rainbow trout, but more sensitive to copper. Subcellular distribution of metals may play a role in the species-specific differences in sensitivity. White sturgeon diverts a higher amount of cadmium towards a biologically inactive metal pool, explaining its higher tolerance to cadmium compared to trout. For copper, subcellular distribution strategies do not explain why white sturgeon are more sensitive.
Article
Environmental Sciences
Mei Huang, Ze-Hao Shang, Meng-Xiao Wu, Lin -Jiang Zhang, Yun-Long Zhang
Summary: The defensive mechanisms of large-scale loach against ammonia exposure involve the regulation of Rh glycoprotein-related genes. Rh glycoproteins play a significant role in ammonia excretion in gills, but their function is not observed during long-term ammonia exposure. The physiological function of Rh glycoproteins in the skin is still unclear and requires further investigation.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2022)
Article
Marine & Freshwater Biology
Beverly H. K. Po, Chris M. Wood
Summary: The Multi-Ion Toxicity (MIT) Model predicts the transepithelial potential (TEP) as an index of major ion toxicity in freshwater animals. This study investigates the TEP responses and plasma ion levels in juvenile rainbow trout after pre-exposure to different concentrations of major salts. The results support the MIT model and provide insights into physiological responses after extended major ion exposure.
AQUATIC TOXICOLOGY
(2022)
Review
Biology
Adalberto Luis Val, Chris M. Wood
Summary: The Amazon region is a unique area in the world, with rich freshwater fish resources, but is currently facing a serious crisis due to climate change and human activities.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2022)
Article
Biology
Chris M. Wood, Beverly H. K. Po
Summary: This study found that the green crab exhibits both terrestrial and emersion activity during low tide. Treadmill exercise in air showed an inverse relationship between velocity and duration. The recovery process after exercise in air was more pronounced and lasting, including metabolic disturbances and acid-base recovery.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2022)
Article
Biology
Junho Eom, Henrik Lauridsen, Chris M. Wood
Summary: This study examines the feeding and breathing mechanisms of the Pacific hagfish, Eptatretus stoutii, using various methods including video, respirometry, and imaging techniques. The results provide insights into the relationship between the nostril, velum chamber, and food passage, as well as the processes of swallowing and defecation. Furthermore, it reveals an increase in oxygen consumption rate after feeding, which lasts for a prolonged period.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2022)
Article
Marine & Freshwater Biology
John O. Onukwufor, Chris M. Wood
Summary: This study investigates the differential effects of acute temperature, salinity, and oxygen levels on the diffusive water flux and oxygen uptake of English sole and Pacific sanddab. The results suggest that both species exhibit similar responses to acute hypoxia, but differ in their sensitivity to acute temperature and salinity changes.
Article
Fisheries
Peter Elliot Holder, Chris M. Wood, Michael J. Lawrence, Timothy D. Clark, Cory D. Suski, Jean-Michel Weber, Andy J. Danylchuk, Steven J. Cooke
Summary: Post-exercise mortality (PEM) can occur in fish when they exercise to exhaustion and surpass their physiological limits, leading to death. The causes of PEM are not fully understood, but studies have explored factors such as oxygen delivery, ion regulation, hormone signalling, and cardiac function. Improved data collection methods and experimental protocols have contributed to our understanding of PEM and have informed management actions. While progress has been made, there is still much to uncover through future research.
FISH AND FISHERIES
(2022)
Article
Physiology
Marina Giacomin, Patricia M. Schulte, Chris M. Wood
Summary: The osmorespiratory compromise in fishes refers to the trade-off between respiratory gas exchange and osmolyte/water balance at the gills. Exhaustive exercise in Pacific spiny dogfish led to increased oxygen consumption and ammonia losses, while urea-N losses were tightly regulated. Environmental hyperoxia did not alleviate the effects of the compromise.
JOURNAL OF COMPARATIVE PHYSIOLOGY B-BIOCHEMICAL SYSTEMS AND ENVIRONMENTAL PHYSIOLOGY
(2022)
Article
Physiology
Giorgi Dal Pont, Beverly Po, Jun Wang, Chris M. Wood
Summary: The physiological responses of Carcinus maenas to different salinity conditions were evaluated, and wide plasticity and tolerance to disturbances in physiological parameters were observed, suggesting that this species is well adapted to diverse habitats.
JOURNAL OF COMPARATIVE PHYSIOLOGY B-BIOCHEMICAL SYSTEMS AND ENVIRONMENTAL PHYSIOLOGY
(2022)
Article
Environmental Sciences
Anne Cremazy, Susana Braz-Mota, Kevin V. Brix, Rafael M. Duarte, Adalberto L. Val, Chris M. Wood
Summary: This study investigated the effects of natural dissolved organic matter (DOM) on the acute copper toxicity to local fish in the Rio Negro. The results showed that DOM can decrease the bioavailability and toxicity of copper to fish. Additionally, DOM was found to protect against copper uptake and toxicity in the fish. These findings support the use of the Biotic Ligand Model to assess the risk of copper in Amazonian waters.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Zoology
Ellen H. Jung, Jessica Nguyen, Charlotte Nelson, Colin J. Brauner, Chris M. Wood
Summary: The gastrointestinal tract plays a crucial role in nitrogen metabolism in rainbow trout, with the stomach being an important site for independent ammonia absorption and transport.
JOURNAL OF EXPERIMENTAL ZOOLOGY PART A-ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY
(2023)
Article
Zoology
Chris M. Wood
Summary: This study examined the nitrogen waste metabolism in green crabs and found that exercise and emersion had a significant impact on the ammonia(N) excretion rate, but the excretion of urea(N) and urate(N) also indicated their importance. In addition, the study found that the concentrations of ammonia(N) and PNH3 in the hemolymph were higher than in the BCF, and the volume of BCF decreased significantly after emersion and exercise.
JOURNAL OF EXPERIMENTAL ZOOLOGY PART A-ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY
(2023)
Article
Biology
Helen Sadauskas-Henrique, Ora E. Johannsson, Beverly H. K. Po, Adalberto L. Val, Chris M. Wood
Summary: The green crab is affected by intertidal zonation patterns, facing periods of air and water exposure. During these periods, physiological challenges are faced. Oxygen consumption rate remained unchanged during air exposure, but increased during recovery period. Ammonia and urea excretion rates were reduced during air exposure, but rebounded during recovery.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2023)
Article
Biochemistry & Molecular Biology
John O. O. Onukwufor, Derek A. A. Somo, Jeffrey G. G. Richards, Chris M. M. Wood
Summary: In nature, mosshead sculpins face challenges from temperature and oxygen level fluctuations. The sculpins are able to modulate the permeability of their branchial epithelia in response to temperature stress, but not in response to hypoxia and re-oxygenation stress. This contrasts with the responses observed in a similar fish species with lower hypoxia tolerance. Overall, the data suggests a decoupling between diffusive water flux rates and oxygen consumption rates during hypoxia stress.
FISH PHYSIOLOGY AND BIOCHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Junho Eom, Chris M. Wood
Summary: A new less invasive device incorporating an ultrasonic flow probe and a divided chamber was used to measure ventilatory flow rate and % O-2 utilization in rainbow trout after exercise and feeding. The study found that respiration in trout is more efficient than previously believed.
FISH PHYSIOLOGY AND BIOCHEMISTRY
(2023)
Article
Marine & Freshwater Biology
Carolyn Morris, Chris M. Wood
Summary: Marine flatfishes show changes in diffusive water flux and ammonia excretion rates as salinity decreases, while oxygen consumption and urea-N excretion rates remain relatively stable. The increase in diffusive water flux is primarily caused by reduced [Ca2+], rather than reduced salinity itself. Our results suggest that both diffusive water flux and ammonia excretion rates are influenced by salinity and ambient [Ca2+].