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Nutrition: Fish
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Total 23547 results found since Jan 2013.
Exploring the impact of PVC and PVA microplastics on zebrafish tissue using multi-spectral imaging, Optical Coherence Tomography (OCT), and biospeckle OCT (bOCT)
This study investigates the effect of Polyvinyl chloride (PVC) and Polyvinyl alcohol (PVA) microplastics in zebrafish by using multi-spectral imaging (MSI), Optical Coherence Tomography (OCT), and Biospeckle OCT (bOCT). These techniques allow for long-term studies in the fish without invasive procedures in real-time. Zebrafish were exposed to Nile red labeled PVC and PVA for 21 days with 500mg/L concentration. Image acquisition and analysis were performed every five days till the end of the study. MSI images revealed deposition of microplastics in the gills region of the fish; some diffused deposition was seen throughout t...
Source: Chemosphere - September 7, 2023 Category: Chemistry Authors: Pooja C Asani Zoya Alam Raju Poddar Source Type: research
The ghrelin receptor GHSR has two efficient agonists in the lobe-finned fish Latimeria chalumnae
Biochem Biophys Res Commun. 2023 Sep 3;679:110-115. doi: 10.1016/j.bbrc.2023.09.002. Online ahead of print.ABSTRACTThe peptide hormone ghrelin (an agonist) and LEAP2 (an antagonist) play important functions in energy metabolism via their receptor GHSR, an A-class G protein-coupled receptor. Ghrelin, LEAP2, and GHSR are widely present from fishes to mammals. However, our recent study suggested that fish GHSRs have different binding properties to ghrelin: a GHSR from the lobe-finned fish Latimeria chalumnae (coelacanth) is efficiently activated by ghrelin, but GHSRs from the ray-finned fish Danio rerio (zebrafish) and Larimi...
Source: Biochemical and Biophysical Research communications - September 7, 2023 Category: Biochemistry Authors: Hao-Zheng Li Ya-Fen Wang Yong-Shan Zheng Ya-Li Liu Zeng-Guang Xu Zhan-Yun Guo Source Type: research
Exploring the impact of PVC and PVA microplastics on zebrafish tissue using multi-spectral imaging, Optical Coherence Tomography (OCT), and biospeckle OCT (bOCT)
This study investigates the effect of Polyvinyl chloride (PVC) and Polyvinyl alcohol (PVA) microplastics in zebrafish by using multi-spectral imaging (MSI), Optical Coherence Tomography (OCT), and Biospeckle OCT (bOCT). These techniques allow for long-term studies in the fish without invasive procedures in real-time. Zebrafish were exposed to Nile red labeled PVC and PVA for 21 days with 500mg/L concentration. Image acquisition and analysis were performed every five days till the end of the study. MSI images revealed deposition of microplastics in the gills region of the fish; some diffused deposition was seen throughout t...
Source: Chemosphere - September 7, 2023 Category: Chemistry Authors: Pooja C Asani Zoya Alam Raju Poddar Source Type: research
Effects of microfiber and bead microplastic exposure in the goldfish Carassius auratus: Bioaccumulation, antioxidant responses, and cell damage
Aquat Toxicol. 2023 Sep 4;263:106684. doi: 10.1016/j.aquatox.2023.106684. Online ahead of print.ABSTRACTWe confirmed antioxidant-related gene expression, bioaccumulation, and cell damage following exposure to various microplastics in vivo and in vitro in the goldfish Carassius auratus. Exposure of C. auratus to a 500 µm fiber-type microplastic environment (MF; 10 and 100 fibers/L) and two sizes (0.2 and 1.0 µm) of beads (MB; 10 and 100 beads/L) for 120 h increased superoxide dismutase (SOD) mRNA expression in the liver until 24 h followed by a decrease. Whereas, catalase (CAT) mRNA expression increased from 12 h to the e...
Source: Aquatic Toxicology - September 7, 2023 Category: Toxicology Authors: Jin A Kim Min Ju Kim Young-Su Park Chang-Keun Kang Jun-Hwan Kim Cheol Young Choi Source Type: research
Relationship of Mercury and Selenium in Ocean Fish Frequently Consumed in the Seychelles: A Comparison to Levels in Ocean Fish Consumed in the US
Neurotoxicology. 2023 Sep 5:S0161-813X(23)00108-0. doi: 10.1016/j.neuro.2023.09.001. Online ahead of print.ABSTRACTWe characterized mercury and selenium in the fish consumed in the Seychelles Islands to determine if their levels are similar to fish consumed in the US. A secondary aim was to examine whether fish weight and species predict mercury and selenium in fish consumed in the Seychelles. We measured total mercury (THg) and selenium (Se) content of 10 samples from each of the 19 most frequently consumed fish species in Seychelles and for each calculated the Se:Hg molar ratios and the Selenium Health Benefit Value Inde...
Source: Neurotoxicology - September 7, 2023 Category: Neurology Authors: Grazyna Zareba Donald Harrington Tom Scrimale Aubrey LeEsperance Gene E Watson Edwin van Wijngaarden Conrad F Shamlaye Tyler Nicholas Gary J Myers Sally W Thurston Source Type: research
Phosphofructokinase family genes in grass carp: Molecular identification and tissue-specific expression in response to glucose, insulin and glucagon
In this study, grass carp (Ctenopharyngodon idella) was used as animal model and the open reading frame (ORF) sequences of six PFK genetic isoforms of grass carp were cloned. Real-time PCR was used to detect its tissue distribution, and expression changes in oral glucose tolerance test (OGTT), insulin and glucagon injection experiments. The results showed that the ORF of pfkla, pfklb, pfkma, pfkmb, pfkpa and pfkpb genes was 2343, 2340, 2355, 2331, 2364 and 2349 bp in length, respectively. The results of tissue distribution showed that pfkla and pfklb, homologous to mammalian pfkl, exhibited low expression levels in the liv...
Source: Comparative biochemistry and physiology. Part B, Biochemistry and molecular biology. - September 6, 2023 Category: Biochemistry Authors: Yingxin Zhang Chaobin Qin Junli Wang Liping Yang Xiao Yan Shaoyang Zhi Guoxing Nie Source Type: research
Translocation of < sup > 14 < /sup > C-polystyrene nanoplastics into fish during a very-low concentration dietary exposure
This study adapted a method for synthesising semi-stable 14C-PS NPs (through styrene polymerisation) in small volumes for deployment in environmental studies. The method was developed with non-labelled material where the final polystyrene product had a primary particle size of 35 ± 8 nm (as measured by transmission electron microscopy). This method was then applied to 14C-labelled styrene to produce radiolabelled polystyrene nanoplastics (14C-PS NPs). The 14C-PS NPs were added (top-dressed) to a commercially available fish feed, with a measured concentration of 27.9 ± 2.1 kBq kg-1 (n = 5), equating to 5.9 μg polystyrene...
Source: Chemosphere - September 6, 2023 Category: Chemistry Authors: Nathaniel J Clark Astrid C Fischer Lee Durndell Tamara S Galloway Richard C Thompson Source Type: research
Feeling morally troubled about meat, dairy, egg, and fish consumption: Dissonance reduction strategies among different dietary groups
Appetite. 2023 Sep 4:107024. doi: 10.1016/j.appet.2023.107024. Online ahead of print.ABSTRACTA largescale shift towards plant-based diets is considered a critical requirement for tackling ethical, environmental, and global health issues associated with animal food production and consumption. Although previous research has identified psychological strategies that enable meat-eaters to justify and continue meat consumption and feel less morally conflicted about it, research on the psychological strategies that enable consumers to continue dairy, egg, and fish consumption is scarce. We conducted an online survey study using a...
Source: Appetite - September 6, 2023 Category: Nutrition Authors: Maria Ioannidou Valerie Lesk Barbara Stewart-Knox Kathryn B Francis Source Type: research
Examining the subchronic (28-day) effects of aqueous Cd-BaP co-exposure on detoxification capacity and cardiac function in adult zebrafish (Danio rerio)
Aquat Toxicol. 2023 Aug 27;263:106672. doi: 10.1016/j.aquatox.2023.106672. Online ahead of print.ABSTRACTThe present study aimed to examine the effects of environmentally relevant concentrations of cadmium (Cd) and Benzo[a]Pyrene (BaP) in the adult zebrafish (Danio rerio). To this end, fish were exposed to either 1 or 10 μg/L Cd or 0.1 or 1 μg/L BaP in isolation, or a co-exposure containing a mixture of the two toxicants. Our results showed extensive modulation of the expression of key antioxidant genes (GPx, SOD1, catalase), detoxifying genes (MT1, MT2, CYP1A1) and a stress biomarker (HSP70) differing between control, s...
Source: Aquatic Toxicology - September 6, 2023 Category: Toxicology Authors: Vladimir Kodzhahinchev Mahesh Rachamalla Ahmad Al-Dissi Som Niyogi Lynn P Weber Source Type: research
Toxicity of 6PPD-quinone to four freshwater invertebrate species
This study investigated the toxicity of 6PPDQ to four freshwater invertebrate species, larval burrowing mayfly (Hexagenia spp.), juvenile cladoceran (Daphnia magna), file ramshorn snail embryo (Planorbella pilsbryi), and adult washboard mussel (Megalonaias nervosa). For all four species, the highest concentration of 6PPDQ tested did not result in significant mortality. This translated into the determination of the highest concentration that did not cause significant mortality (NOEC) for Hexagenia spp., D. magna, P. pilsbryi, and M. nervosa of 232.0, 42.0, 11.7, and 17.9 μg/L, respectively. The data from this study indicat...
Source: Environmental Pollution - September 6, 2023 Category: Environmental Health Authors: R S Prosser J Salole S Hang Source Type: research
Convergent escape behaviour from distinct visual processing of impending collision in fish and grasshoppers
J Physiol. 2023 Sep 6. doi: 10.1113/JP284022. Online ahead of print.ABSTRACTIn animal species ranging from invertebrate to mammals, visually guided escape behaviours have been studied using looming stimuli, the two-dimensional expanding projection on a screen of an object approaching on a collision course at constant speed. The peak firing rate or membrane potential of neurons responding to looming stimuli often tracks a fixed threshold angular size of the approaching stimulus that contributes to the triggering of escape behaviours. To study whether this result holds more generally, we designed stimuli that simulate accele...
Source: The Journal of Physiology - September 6, 2023 Category: Physiology Authors: Richard B Dewell Terri Carroll-Mikhail Margaret R Eisenbrandt Alexander F Mendoza Bidisha Halder Thomas Preuss Fabrizio Gabbiani Source Type: research
Multi-level assessment of the origin, feeding area and organohalogen contamination on salmon from the Baltic Sea
Ecotoxicol Environ Saf. 2023 Sep 4;264:115424. doi: 10.1016/j.ecoenv.2023.115424. Online ahead of print.ABSTRACTThe Atlantic salmon (Salmo salar) population in the Baltic Sea consists of wild and hatchery-reared fish that have been released into the sea to support salmon stocks. During feeding migration, salmon migrate to different parts of the Baltic Sea and are exposed to various biotic and abiotic stressors, such as organohalogen compounds (OHCs). The effects of salmon origin (wild or hatchery-reared), feeding area (Baltic Main Basin, Bothnian Sea, and Gulf of Finland), and OHC concentration on the differences in hepati...
Source: Ecotoxicology and Environmental Safety - September 6, 2023 Category: Environmental Health Authors: Mirella Kanerva Nguyen Minh Tue Tatsuya Kunisue Kristiina Am Vuori Hisato Iwata Source Type: research
What is the role of 'theory' in training GP trainers?
Educ Prim Care. 2023 Sep 6:1-5. doi: 10.1080/14739879.2023.2253539. Online ahead of print.ABSTRACTA recent evaluation paper of the London General Practitioner Trainer Course by Knight et al questions the importance of educational theory in preparing GPs to become trainers and asks 'how much educational theory do GP trainers need to know in order to train effectively?' This paper places the authors' question under consideration, arguing that before the relationship between the theory and practice of education can be considered, the nature of 'educational practice' needs examination. There then follows a discussion of the wo...
Source: Primary Care - September 6, 2023 Category: Primary Care Authors: Samantha Scallan Source Type: research
