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Oliveira JPLD, Carneiro WF, Silva KCDD, Martins MSDA, de Souza SP, Virote BDCR, Konig IFM, Vilas Boas EVDB, Murgas LDS, Carvalho EEN. Diet with different concentrations of lychee peel flour modulates oxidative stress parameters and antioxidant activity in zebrafish. Comp Biochem Physiol B Biochem Mol Biol 2024; 272:110964. [PMID: 38431089 DOI: 10.1016/j.cbpb.2024.110964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 02/27/2024] [Accepted: 02/28/2024] [Indexed: 03/05/2024]
Abstract
The agri-food industry generates substantial waste, leading to significant environmental impacts. Lychee (Litchi chinensis Sonnerat), which is rich in bioactive compounds in its peel, pulp, and seeds, offers an opportunity for waste use. This study aimed to evaluate the effects of supplementing a high-carbohydrate diet with varying levels of lychee peel flour on lipid metabolism biomarkers and oxidative stress in a zebrafish (Danio rerio) model. A total of 225 zebrafish, approximately four months old, were divided into five groups: control, high-carbohydrate (HC), HC2%, HC4%, and HC6%. The study did not find significant differences in the growth performance of zebrafish in any group. However, the HC6% group exhibited a significant decrease in glucose and triglyceride levels compared with the HC group. Furthermore, this group showed enhanced activities of the antioxidant enzymes catalase (CAT) and superoxide dismutase (SOD), along with reduced levels of malondialdehyde (MDA). Increased antioxidant activity was also evidenced by DPPH-, ABTS+, and β-carotene/Linoleic acid assays in the HC6% group. A positive correlation was identified between SOD/CAT activity and in vitro antioxidant assays. These findings suggest that dietary supplementation with 6% lychee peel flour can significantly modulate glucose homeostasis, lipid metabolism, and antioxidant activity in zebrafish.
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Affiliation(s)
- João Paulo Lima de Oliveira
- Lavras School of Agricultural Sciences, Department of Agriculture, Federal University of Lavras, 37200-900, Minas Gerais, Brazil
| | - William Franco Carneiro
- Faculty of Animal Science and Veterinary Medicine, Department of Veterinary Medicine, Federal University of Lavras, 37200-900, Minas Gerais, Brazil
| | - Kiara Cândido Duarte da Silva
- Faculty of Animal Science and Veterinary Medicine, Department of Veterinary Medicine, Federal University of Lavras, 37200-900, Minas Gerais, Brazil
| | - Moises Silvestre de Azevedo Martins
- Faculty of Animal Science and Veterinary Medicine, Department of Veterinary Medicine, Federal University of Lavras, 37200-900, Minas Gerais, Brazil
| | - Stefania Priscilla de Souza
- Faculty of Animal Science and Veterinary Medicine, Department of Animal Science, Federal University of Lavras, 37200-900, Minas Gerais, Brazil
| | - Bárbara do Carmo Rodrigues Virote
- Faculty of Animal Science and Veterinary Medicine, Department of Veterinary Medicine, Federal University of Lavras, 37200-900, Minas Gerais, Brazil
| | - Isaac Filipe Moreira Konig
- Faculty of Animal Science and Veterinary Medicine, Department of Veterinary Medicine, Federal University of Lavras, 37200-900, Minas Gerais, Brazil
| | | | - Luis David Solis Murgas
- Faculty of Animal Science and Veterinary Medicine, Department of Veterinary Medicine, Federal University of Lavras, 37200-900, Minas Gerais, Brazil
| | - Elisângela Elena Nunes Carvalho
- Lavras School of Agricultural Sciences, Department of Food Science, Federal University of Lavras, 37200-900, Minas Gerais, Brazil.
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Sadler DE, Watts PC, Uusi-Heikkilä S. Directional selection, not the direction of selection, affects telomere length and copy number at ribosomal RNA loci. Sci Rep 2024; 14:12162. [PMID: 38802448 PMCID: PMC11130246 DOI: 10.1038/s41598-024-63030-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Accepted: 05/23/2024] [Indexed: 05/29/2024] Open
Abstract
Many fisheries exert directional selection on traits such as body size and growth rate. Whether directional selection impacts regions of the genome associated with traits related to growth is unknown. To address this issue, we characterised copy number variation in three regions of the genome associated with cell division, (1) telomeric DNA, (2) loci transcribed as ribosomal RNA (rDNA), and (3) mitochondrial DNA (mtDNA), in three selection lines of zebrafish reared at three temperatures (22 °C, 28 °C, and 34 °C). Selection lines differed in (1) the direction of selection (two lines experienced directional selection for large or small body size) and (2) whether they experienced any directional selection itself. Lines that had experienced directional selection were smaller, had lower growth rate, shorter telomeres, and lower rDNA copy number than the line that experiencing no directional selection. Neither telomere length nor rDNA copy number were affected by temperature. In contrast, mtDNA content increased at elevated temperature but did not differ among selection lines. Though directional selection impacts rDNA and telomere length, direction of such selection did not matter, whereas mtDNA acts as a stress marker for temperature. Future work should examine the consequences of these genomic changes in natural fish stocks.
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Affiliation(s)
- Daniel E Sadler
- Department of Biological and Environmental Science, University of Jyväskylä, 40014, Jyväskylä, Finland.
| | - Phillip C Watts
- Department of Biological and Environmental Science, University of Jyväskylä, 40014, Jyväskylä, Finland
| | - Silva Uusi-Heikkilä
- Department of Biological and Environmental Science, University of Jyväskylä, 40014, Jyväskylä, Finland
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Sadler DE, van Dijk S, Karjalainen J, Watts PC, Uusi‐Heikkilä S. Does size-selective harvesting erode adaptive potential to thermal stress? Ecol Evol 2024; 14:e11007. [PMID: 38333098 PMCID: PMC10850808 DOI: 10.1002/ece3.11007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 01/12/2024] [Accepted: 01/30/2024] [Indexed: 02/10/2024] Open
Abstract
Overharvesting is a serious threat to many fish populations. High mortality and directional selection on body size can cause evolutionary change in exploited populations via selection for a specific phenotype and a potential reduction in phenotypic diversity. Whether the loss of phenotypic diversity that accompanies directional selection impairs response to environmental stress is not known. To address this question, we exposed three zebrafish selection lines to thermal stress. Two lines had experienced directional selection for (1) large and (2) small body size, and one was (3) subject to random removal of individuals with respect to body size (i.e. line with no directional selection). Selection lines were exposed to three temperatures (elevated, 34°C; ambient, 28°C; low, 22°C) to determine the response to an environmental stressor (thermal stress). We assessed differences among selection lines in their life history (growth and reproduction), physiological traits (metabolic rate and critical thermal max) and behaviour (activity and feeding behaviour) when reared at different temperatures. Lines experiencing directional selection (i.e. size selected) showed reduced growth rate and a shift in average phenotype in response to lower or elevated thermal stress compared with fish from the random-selected line. Our data indicate that populations exposed to directional selection can have a more limited capacity to respond to thermal stress compared with fish that experience a comparable reduction in population size (but without directional selection). Future studies should aim to understand the impacts of environmental stressors on natural fish stocks.
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Affiliation(s)
- Daniel E. Sadler
- Department of Biological and Environmental ScienceUniversity of JyväskyläJyväskyläFinland
| | - Stephan van Dijk
- Department of Biological and Environmental ScienceUniversity of JyväskyläJyväskyläFinland
| | - Juha Karjalainen
- Department of Biological and Environmental ScienceUniversity of JyväskyläJyväskyläFinland
| | - Phillip C. Watts
- Department of Biological and Environmental ScienceUniversity of JyväskyläJyväskyläFinland
| | - Silva Uusi‐Heikkilä
- Department of Biological and Environmental ScienceUniversity of JyväskyläJyväskyläFinland
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4
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Neighmond H, Quinn A, Schmandt B, Ettinger K, Hill A, Williams L. Developmental bisphenol S toxicity in two freshwater animal models. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2023; 104:104311. [PMID: 37939749 PMCID: PMC11178287 DOI: 10.1016/j.etap.2023.104311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 11/04/2023] [Indexed: 11/10/2023]
Abstract
Freshwater animals are exposed to anthropogenic contaminants and are biomonitors of water quality and models of the deleterious impacts of exposure. Sponges, such as Ephydatia muelleri, constantly pump water and are effective indicators of water-soluble contaminants. Zebrafish (Danio rerio), native to Southeast Asia, live in the water column and feed at the water-sediment interface and are exposed to both water-soluble and insoluble contaminants. While sponges and zebrafish diverged ∼700 million years ago, they share common genetic elements, and their response to contaminants can be predictive to a wide-range of animals. An emerging contaminant, bisphenol S, was tested to evaluate its toxicity during development. The toxicity and mechanism(s) of action of BPS is not well known. Water-borne exposures to BPS caused differing hatching rates, morphological changes, and shared gene expression changes of toxicologically-relevant genes. This study shows that BPS causes similarly adverse developmental impacts pointing to some overlapping mechanisms of action.
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Affiliation(s)
- Hayley Neighmond
- Biology Department, Bates College, 44 Campus Avenue, Lewiston, ME 04240, USA
| | - Abigail Quinn
- Biology Department, Bates College, 44 Campus Avenue, Lewiston, ME 04240, USA
| | - Benjamin Schmandt
- Biology Department, Bates College, 44 Campus Avenue, Lewiston, ME 04240, USA
| | - Kerry Ettinger
- Biology Department, Bates College, 44 Campus Avenue, Lewiston, ME 04240, USA
| | - April Hill
- Biology Department, Bates College, 44 Campus Avenue, Lewiston, ME 04240, USA.
| | - Larissa Williams
- Biology Department, Bates College, 44 Campus Avenue, Lewiston, ME 04240, USA.
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Suriyampola PS, Zúñiga-Vega JJ, Jayasundara N, Flores J, Lopez M, Bhat A, Martins EP. River zebrafish combine behavioral plasticity and generalized morphology with specialized sensory and metabolic physiology to survive in a challenging environment. Sci Rep 2023; 13:16398. [PMID: 37773260 PMCID: PMC10541436 DOI: 10.1038/s41598-023-42829-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 09/15/2023] [Indexed: 10/01/2023] Open
Abstract
Phenotypes that allow animals to detect, weather, and predict changes efficiently are essential for survival in fluctuating environments. Some phenotypes may remain specialized to suit an environment perfectly, while others become more plastic or generalized, shifting flexibly to match current context or adopting a form that can utilize a wide range of contexts. Here, we tested the differences in behavior, morphology, sensory and metabolic physiology between wild zebrafish (Danio rerio) in highly variable fast-flowing rivers and still-water sites. We found that river zebrafish moved at higher velocities than did still-water fish, had lower oxygen demands, and responded less vigorously to small changes in flow rate, as we might expect for fish that are well-suited to high-flow environments. River zebrafish also had less streamlined bodies and were more behaviorally plastic than were still-water zebrafish, both features that may make them better-suited to a transitional lifestyle. Our results suggest that zebrafish use distinct sensory mechanisms and metabolic physiology to reduce energetic costs of living in fast-flowing water while relying on morphology and behavior to create flexible solutions to a challenging habitat. Insights on animals' reliance on traits with different outcomes provide a framework to better understand their survival in future environmental fluctuations.
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Affiliation(s)
| | - José Jaime Zúñiga-Vega
- Departamento de Ecología y Recursos Naturales, Facultad de Ciencias, Universidad Nacional Autónoma de México, 04510, Mexico City, Mexico
| | | | - Jennifer Flores
- School of Life Sciences, Arizona State University, Tempe, AZ, 85281, USA
| | - Melissa Lopez
- School of Life Sciences, Arizona State University, Tempe, AZ, 85281, USA
| | - Anuradha Bhat
- Department of Biological Sciences, Indian Institute of Science Education and Research-Kolkata, Mohanpur, 741246, India
| | - Emília P Martins
- School of Life Sciences, Arizona State University, Tempe, AZ, 85281, USA
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6
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Fusco-Almeida AM, de Matos Silva S, dos Santos KS, de Lima Gualque MW, Vaso CO, Carvalho AR, Medina-Alarcón KP, Pires ACMDS, Belizario JA, de Souza Fernandes L, Moroz A, Martinez LR, Ruiz OH, González Á, Mendes-Giannini MJS. Alternative Non-Mammalian Animal and Cellular Methods for the Study of Host-Fungal Interactions. J Fungi (Basel) 2023; 9:943. [PMID: 37755051 PMCID: PMC10533014 DOI: 10.3390/jof9090943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 08/28/2023] [Accepted: 08/30/2023] [Indexed: 09/28/2023] Open
Abstract
In the study of fungal pathogenesis, alternative methods have gained prominence due to recent global legislation restricting the use of mammalian animals in research. The principle of the 3 Rs (replacement, reduction, and refinement) is integrated into regulations and guidelines governing animal experimentation in nearly all countries. This principle advocates substituting vertebrate animals with other invertebrate organisms, embryos, microorganisms, or cell cultures. This review addresses host-fungus interactions by employing three-dimensional (3D) cultures, which offer more faithful replication of the in vivo environment, and by utilizing alternative animal models to replace traditional mammals. Among these alternative models, species like Caenorhabditis elegans and Danio rerio share approximately 75% of their genes with humans. Furthermore, models such as Galleria mellonella and Tenebrio molitor demonstrate similarities in their innate immune systems as well as anatomical and physiological barriers, resembling those found in mammalian organisms.
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Affiliation(s)
- Ana Marisa Fusco-Almeida
- Department of Clinical Analysis, School of Pharmaceutical Science, Universidade Estadual Paulista (UNESP), Araraquara 14800-903, SP, Brazil; (A.M.F.-A.); (S.d.M.S.); (K.S.d.S.); (M.W.d.L.G.); (C.O.V.); (A.R.C.); (K.P.M.-A.); (A.C.M.d.S.P.); (J.A.B.); (L.d.S.F.); (A.M.)
| | - Samanta de Matos Silva
- Department of Clinical Analysis, School of Pharmaceutical Science, Universidade Estadual Paulista (UNESP), Araraquara 14800-903, SP, Brazil; (A.M.F.-A.); (S.d.M.S.); (K.S.d.S.); (M.W.d.L.G.); (C.O.V.); (A.R.C.); (K.P.M.-A.); (A.C.M.d.S.P.); (J.A.B.); (L.d.S.F.); (A.M.)
- Basic and Applied Microbiology Group (MICROBA), School of Microbiology, Universidad de Antioquia, Medellin 050010, Colombia; (O.H.R.); (Á.G.)
| | - Kelvin Sousa dos Santos
- Department of Clinical Analysis, School of Pharmaceutical Science, Universidade Estadual Paulista (UNESP), Araraquara 14800-903, SP, Brazil; (A.M.F.-A.); (S.d.M.S.); (K.S.d.S.); (M.W.d.L.G.); (C.O.V.); (A.R.C.); (K.P.M.-A.); (A.C.M.d.S.P.); (J.A.B.); (L.d.S.F.); (A.M.)
| | - Marcos William de Lima Gualque
- Department of Clinical Analysis, School of Pharmaceutical Science, Universidade Estadual Paulista (UNESP), Araraquara 14800-903, SP, Brazil; (A.M.F.-A.); (S.d.M.S.); (K.S.d.S.); (M.W.d.L.G.); (C.O.V.); (A.R.C.); (K.P.M.-A.); (A.C.M.d.S.P.); (J.A.B.); (L.d.S.F.); (A.M.)
| | - Carolina Orlando Vaso
- Department of Clinical Analysis, School of Pharmaceutical Science, Universidade Estadual Paulista (UNESP), Araraquara 14800-903, SP, Brazil; (A.M.F.-A.); (S.d.M.S.); (K.S.d.S.); (M.W.d.L.G.); (C.O.V.); (A.R.C.); (K.P.M.-A.); (A.C.M.d.S.P.); (J.A.B.); (L.d.S.F.); (A.M.)
| | - Angélica Romão Carvalho
- Department of Clinical Analysis, School of Pharmaceutical Science, Universidade Estadual Paulista (UNESP), Araraquara 14800-903, SP, Brazil; (A.M.F.-A.); (S.d.M.S.); (K.S.d.S.); (M.W.d.L.G.); (C.O.V.); (A.R.C.); (K.P.M.-A.); (A.C.M.d.S.P.); (J.A.B.); (L.d.S.F.); (A.M.)
| | - Kaila Petrolina Medina-Alarcón
- Department of Clinical Analysis, School of Pharmaceutical Science, Universidade Estadual Paulista (UNESP), Araraquara 14800-903, SP, Brazil; (A.M.F.-A.); (S.d.M.S.); (K.S.d.S.); (M.W.d.L.G.); (C.O.V.); (A.R.C.); (K.P.M.-A.); (A.C.M.d.S.P.); (J.A.B.); (L.d.S.F.); (A.M.)
| | - Ana Carolina Moreira da Silva Pires
- Department of Clinical Analysis, School of Pharmaceutical Science, Universidade Estadual Paulista (UNESP), Araraquara 14800-903, SP, Brazil; (A.M.F.-A.); (S.d.M.S.); (K.S.d.S.); (M.W.d.L.G.); (C.O.V.); (A.R.C.); (K.P.M.-A.); (A.C.M.d.S.P.); (J.A.B.); (L.d.S.F.); (A.M.)
| | - Jenyffie Araújo Belizario
- Department of Clinical Analysis, School of Pharmaceutical Science, Universidade Estadual Paulista (UNESP), Araraquara 14800-903, SP, Brazil; (A.M.F.-A.); (S.d.M.S.); (K.S.d.S.); (M.W.d.L.G.); (C.O.V.); (A.R.C.); (K.P.M.-A.); (A.C.M.d.S.P.); (J.A.B.); (L.d.S.F.); (A.M.)
| | - Lígia de Souza Fernandes
- Department of Clinical Analysis, School of Pharmaceutical Science, Universidade Estadual Paulista (UNESP), Araraquara 14800-903, SP, Brazil; (A.M.F.-A.); (S.d.M.S.); (K.S.d.S.); (M.W.d.L.G.); (C.O.V.); (A.R.C.); (K.P.M.-A.); (A.C.M.d.S.P.); (J.A.B.); (L.d.S.F.); (A.M.)
| | - Andrei Moroz
- Department of Clinical Analysis, School of Pharmaceutical Science, Universidade Estadual Paulista (UNESP), Araraquara 14800-903, SP, Brazil; (A.M.F.-A.); (S.d.M.S.); (K.S.d.S.); (M.W.d.L.G.); (C.O.V.); (A.R.C.); (K.P.M.-A.); (A.C.M.d.S.P.); (J.A.B.); (L.d.S.F.); (A.M.)
| | - Luis R. Martinez
- Department of Oral Biology, College of Dentistry, University of Florida, Gainesville, FL 32610, USA;
- Emerging Pathogens Institute, University of Florida, Gainesville, FL 32610, USA
- Center for Immunology and Transplantation, University of Florida, Gainesville, FL 32610, USA
- Center for Translational Research in Neurodegenerative Disease, University of Florida, Gainesville, FL 32610, USA
| | - Orville Hernandez Ruiz
- Basic and Applied Microbiology Group (MICROBA), School of Microbiology, Universidad de Antioquia, Medellin 050010, Colombia; (O.H.R.); (Á.G.)
- Cellular and Molecular Biology Group University of Antioquia, Corporation for Biological Research, Medellin 050010, Colombia
| | - Ángel González
- Basic and Applied Microbiology Group (MICROBA), School of Microbiology, Universidad de Antioquia, Medellin 050010, Colombia; (O.H.R.); (Á.G.)
| | - Maria José Soares Mendes-Giannini
- Department of Clinical Analysis, School of Pharmaceutical Science, Universidade Estadual Paulista (UNESP), Araraquara 14800-903, SP, Brazil; (A.M.F.-A.); (S.d.M.S.); (K.S.d.S.); (M.W.d.L.G.); (C.O.V.); (A.R.C.); (K.P.M.-A.); (A.C.M.d.S.P.); (J.A.B.); (L.d.S.F.); (A.M.)
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7
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Shaftoe JB, Manchester EA, Gillis TE. Cardiac remodeling caused by cold acclimation is reversible with rewarming in zebrafish (Danio rerio). Comp Biochem Physiol A Mol Integr Physiol 2023; 283:111466. [PMID: 37302568 DOI: 10.1016/j.cbpa.2023.111466] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 05/31/2023] [Accepted: 06/08/2023] [Indexed: 06/13/2023]
Abstract
Cold acclimation of zebrafish causes changes to the structure and composition of the heart. However, little is known of the consequences of these changes on heart function or if these changes are reversible with rewarming back to the initial temperature. In the current study, zebrafish were acclimated from 27℃ to 20°C, then after 17 weeks, a subset of fish were rewarmed to 27°C and held at that temperature for 7 weeks. The length of this trial, 23 weeks, was chosen to mimic seasonal changes in temperature. Cardiac function was measured in each group at 27°C and 20°C using high frequency ultrasound. It was found that cold acclimation caused a decrease in ventricular cross-sectional area, compact myocardial thickness, and total muscle area. There was also a decrease in end-diastolic area with cold acclimation that reversed upon rewarming to control temperatures. Rewarming caused an increase in the thickness of the compact myocardium, total muscle area, and end-diastolic area back to control levels. This is the first experiment to demonstrate that cardiac remodeling, induced by cold acclimation, is reversible upon re-acclimation to control temperature (27°C). Finally, body condition measurements reveal that fish that had been cold-acclimated and then reacclimated to 27°C, were in poorer condition than the fish that remained at 20°C as well as the control fish at week 23. This suggests that the physiological responses to the multiple changes in temperature had a significant energetic cost to the animal. SUMMARY STATEMENT: The decrease in cardiac muscle density, compact myocardium thickness and diastolic area in zebrafish caused by cold acclimation, was reversed with rewarming to control temperatures.
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Affiliation(s)
- Jared B Shaftoe
- Department of Integrative Biology, University of Guelph, Canada
| | | | - Todd E Gillis
- Department of Integrative Biology, University of Guelph, Canada.
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Sen Sarma O, Frymus N, Axling F, Thörnqvist PO, Roman E, Winberg S. Optimizing zebrafish rearing-Effects of fish density and environmental enrichment. Front Behav Neurosci 2023; 17:1204021. [PMID: 37456810 PMCID: PMC10340554 DOI: 10.3389/fnbeh.2023.1204021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 06/12/2023] [Indexed: 07/18/2023] Open
Abstract
Introduction Despite its popularity in research, there is very little scientifically validated knowledge about the best practices on zebrafish (Danio rerio) husbandry, which has led to several facilities having their own husbandry protocols. This study was performed to expand knowledge on the effects of enrichment and fish density on the welfare of zebrafish, with hopes of providing a scientific basis for future recommendations and legislations. Methods Zebrafish were reared at three different stocking densities, (1, 3 or 6 fish/L), in tanks with or without environmental enrichment. Agonistic behavior was observed twice a week for 9 weeks directly in the housing tanks. Aspects of welfare is known to be reflected in neuroendocrine stress responses. Thus, cortisol secretion in response to lowering the water level was analyzed for each group. In addition, we assessed cortisol secretion in response to confinement and risk-taking behavior (boldness) using the novel tank diving test for individual fish. At termination of the experiment fish were subjected to stress by transfer to a novel environment and brain tissue was sampled for analysis of brain monoaminergic activity. Results Fish kept at the lowest density (1 fish/L) showed a significantly higher level of aggression than fish kept at 3 or 6 fish/L. Moreover, fish kept at this low density showed significantly higher cortisol secretion on a group level than fish kept at the higher stocking densities, when subjected to lowering of the water level. Keeping fish at 1 fish/L also had effects on brain monoamines, these fish showing higher brain dopamine concentrations but lower dopamine turnover than fish kept at higher densities. Neither stocking density or enrichment had any clear effects on the behavior of individual fish in the novel tank diving test. However, fish kept at high densities showed lower and more variable growth rates than fish kept at 1 fish/L. Discussion Taken together these results suggest that zebrafish should not be kept at a density of 1 fish/L. The optimal stocking density is likely to be in the range of 3-6 fish/L.
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Affiliation(s)
- Oly Sen Sarma
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
| | - Natalia Frymus
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
| | - Fredrik Axling
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
| | | | - Erika Roman
- Department of Anatomy, Physiology, and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
- Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | - Svante Winberg
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
- Department of Anatomy, Physiology, and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
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Jorge S, Félix L, Costas B, Valentim AM. Housing Conditions Affect Adult Zebrafish ( Danio rerio) Behavior but Not Their Physiological Status. Animals (Basel) 2023; 13:ani13061120. [PMID: 36978661 PMCID: PMC10044285 DOI: 10.3390/ani13061120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 03/15/2023] [Accepted: 03/20/2023] [Indexed: 03/30/2023] Open
Abstract
Zebrafish is a valuable model for neuroscience research, but the housing conditions to which it is exposed daily may be impairing its welfare status. The use of environmental enrichment and the refinement of methodology for cortisol measurement could reduce stress, improving its welfare and its suitability as an animal model used in stress research. Thus, this study aimed to evaluate (I) the influence of different housing conditions on zebrafish physiology and behavior, and (II) skin mucus potential for cortisol measurement in adult zebrafish. For this, AB zebrafish were raised under barren or enriched (PVC pipes and gravel image) environmental conditions. After 6 months, their behavior was assessed by different behavioral paradigms (shoaling, white-black box test, and novel tank). The physiological response was also evaluated through cortisol levels (whole-body homogenates and skin mucus) and brain oxidative stress markers. The results revealed that enriched-housed fish had an increased nearest neighbors' distance and reduced activity. However, no effect on body length or stress biomarkers was observed; whole-body and skin mucus cortisol levels had the same profile between groups. In conclusion, this study highlights the skin mucus potential as a matrix for cortisol quantification, and how housing conditions could influence the data in future studies.
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Affiliation(s)
- Sara Jorge
- i3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
- Laboratory Animal Science, IBMC-Instituto de Biologia Molecular Celular, Universidade do Porto, 4200-135 Porto, Portugal
- Centro Interdisciplinar de Investigação Marinha e Ambiental, (CIIMAR), 4450-208 Matosinhos, Portugal
- Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade do Porto, 4050-313 Porto, Portugal
| | - Luís Félix
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Instituto para a Inovação, Capacitação e Sustentabilidade da Produção Agroalimentar (Inov4Agro), University of Trás-os-Montes and Alto Douro (UTAD), Quinta de Prados, 5000-801 Vila Real, Portugal
| | - Benjamín Costas
- Centro Interdisciplinar de Investigação Marinha e Ambiental, (CIIMAR), 4450-208 Matosinhos, Portugal
- Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade do Porto, 4050-313 Porto, Portugal
| | - Ana M Valentim
- i3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
- Laboratory Animal Science, IBMC-Instituto de Biologia Molecular Celular, Universidade do Porto, 4200-135 Porto, Portugal
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10
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Zhu SI, McCullough MH, Pujic Z, Sibberas J, Sun B, Darveniza T, Bucknall B, Avitan L, Goodhill GJ. fmr1 Mutation Alters the Early Development of Sensory Coding and Hunting and Social Behaviors in Larval Zebrafish. J Neurosci 2023; 43:1211-1224. [PMID: 36596699 PMCID: PMC9962781 DOI: 10.1523/jneurosci.1721-22.2022] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 12/16/2022] [Accepted: 12/20/2022] [Indexed: 01/05/2023] Open
Abstract
Autism spectrum disorders (ASDs) are developmental in origin; however, little is known about how they affect the early development of behavior and sensory coding. The most common inherited form of autism is Fragile X syndrome (FXS), caused by a mutation in FMR1 Mutation of fmr1 in zebrafish causes anxiety-like behavior, hyperactivity, and hypersensitivity in auditory and visual processing. Here, we show that zebrafish fmr1-/- mutant larvae of either sex also display changes in hunting behavior, tectal coding, and social interaction. During hunting, they were less successful at catching prey and displayed altered behavioral sequences. In the tectum, representations of prey-like stimuli were more diffuse and had higher dimensionality. In a social behavioral assay, they spent more time observing a conspecific but responded more slowly to social cues. However, when given a choice of rearing environment fmr1-/- larvae preferred one with reduced visual stimulation, and rearing them in this environment reduced genotype-specific effects on tectal excitability. Together, these results shed new light on how fmr1-/- changes the early development of neural systems and behavior in a vertebrate.SIGNIFICANCE STATEMENT Autism spectrum disorders (ASDs) are caused by changes in early neural development. Animal models of ASDs offer the opportunity to study these developmental processes in greater detail than in humans. Here, we found that a zebrafish mutant for a gene which in humans causes one type of ASD showed early alterations in hunting behavior, social behavior, and how visual stimuli are represented in the brain. However, we also found that mutant fish preferred reduced visual stimulation, and rearing them in this environment reduced alterations in neural activity patterns. These results suggest interesting new directions for using zebrafish as a model to study the development of brain and behavior in ASDs, and how the impact of ASDs could potentially be reduced.
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Affiliation(s)
- Shuyu I Zhu
- Queensland Brain Institute
- Departments of Developmental Biology and Neuroscience, Washington University in St. Louis, St. Louis, Missouri 63110
| | | | | | | | | | - Thomas Darveniza
- Departments of Developmental Biology and Neuroscience, Washington University in St. Louis, St. Louis, Missouri 63110
| | | | | | - Geoffrey J Goodhill
- Queensland Brain Institute
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
- Departments of Developmental Biology and Neuroscience, Washington University in St. Louis, St. Louis, Missouri 63110
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11
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Zhu SI, Goodhill GJ. From perception to behavior: The neural circuits underlying prey hunting in larval zebrafish. Front Neural Circuits 2023; 17:1087993. [PMID: 36817645 PMCID: PMC9928868 DOI: 10.3389/fncir.2023.1087993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 01/10/2023] [Indexed: 02/04/2023] Open
Abstract
A key challenge for neural systems is to extract relevant information from the environment and make appropriate behavioral responses. The larval zebrafish offers an exciting opportunity for studying these sensing processes and sensory-motor transformations. Prey hunting is an instinctual behavior of zebrafish that requires the brain to extract and combine different attributes of the sensory input and form appropriate motor outputs. Due to its small size and transparency the larval zebrafish brain allows optical recording of whole-brain activity to reveal the neural mechanisms involved in prey hunting and capture. In this review we discuss how the larval zebrafish brain processes visual information to identify and locate prey, the neural circuits governing the generation of motor commands in response to prey, how hunting behavior can be modulated by internal states and experience, and some outstanding questions for the field.
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Affiliation(s)
- Shuyu I. Zhu
- Departments of Developmental Biology and Neuroscience, Washington University in St. Louis, St. Louis, MO, United States
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12
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Cavallino L, Rincón L, Scaia MF. Social behaviors as welfare indicators in teleost fish. Front Vet Sci 2023; 10:1050510. [PMID: 37168096 PMCID: PMC10164990 DOI: 10.3389/fvets.2023.1050510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 04/06/2023] [Indexed: 05/13/2023] Open
Abstract
Animal welfare is a key issue not only for aquaculture industry and food production, but also for daily husbandry practices in research topics related to physiology in wild and farmed animals. In this context, teleost fish constitute interesting models to assess alternative welfare indicators because of their wide diversity in reproductive and social structures. Any framework for assessing teleost fish welfare needs to account for the physiological mechanisms involved in each species as a first step. A comprehensive approach should also take into account how these physiological and behavioral parameters can be altered by environmental enrichment considering the specific requirements in each case and identifying intrinsic biological characteristics of individual species. This review will show how cortisol and sex steroids regulate social behavior in teleost fish, and how different aspects of social behavior can be employed as welfare indicators according to specific characteristics in each case. This article will consider evidence in teleost fish, including cichlids, characids and cyprinids with different reproductive strategies and social structures (e.g., territorial social hierarchies or shoaling behavior). Neotropical species will be particularly emphasized. The main laboratory-based animal welfare indicators are cortisol, a classical stress hormone, together with sex steroids. Considering that the endocrine landscape is intrinsically related to social behavior, reproductive and agonistic behavioral traits such as aggression, anxiety and courtship are key elements to assess welfare under housing and culture conditions. This review highlights the importance of assessing physiological mechanisms and identifying behavioral characteristics in teleost fish, especially in Neotropical species, as a baseline to understand which environmental enrichment can improve animal welfare in each individual species.
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Affiliation(s)
- Luciano Cavallino
- Instituto de Biodiversidad y Biología Experimental y Aplicada – CONICET, Ciudad Autónoma de Buenos Aires, Argentina
- Laboratorio de Neuroendocrinología y Comportamiento, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Laura Rincón
- Instituto de Biodiversidad y Biología Experimental y Aplicada – CONICET, Ciudad Autónoma de Buenos Aires, Argentina
- Laboratorio de Neuroendocrinología y Comportamiento, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - María Florencia Scaia
- Instituto de Biodiversidad y Biología Experimental y Aplicada – CONICET, Ciudad Autónoma de Buenos Aires, Argentina
- Laboratorio de Neuroendocrinología y Comportamiento, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
- *Correspondence: María Florencia Scaia,
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13
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Lee CJ, Paull GC, Tyler CR. Improving zebrafish laboratory welfare and scientific research through understanding their natural history. Biol Rev Camb Philos Soc 2022; 97:1038-1056. [PMID: 34983085 PMCID: PMC9303617 DOI: 10.1111/brv.12831] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 12/17/2021] [Accepted: 12/23/2021] [Indexed: 12/13/2022]
Abstract
Globally, millions of zebrafish (Danio rerio) are used for scientific laboratory experiments for which researchers have a duty of care, with legal obligations to consider their welfare. Considering the growing use of the zebrafish as a vertebrate model for addressing a diverse range of scientific questions, optimising their laboratory conditions is of major importance for both welfare and improving scientific research. However, most guidelines for the care and breeding of zebrafish for research are concerned primarily with maximising production and minimising costs and pay little attention to the effects on welfare of the environments in which the fish are maintained, or how those conditions affect their scientific research. Here we review the physical and social conditions in which laboratory zebrafish are kept, identifying and drawing attention to factors likely to affect their welfare and experimental science. We also identify a fundamental lack knowledge of how zebrafish interact with many biotic and abiotic features in their natural environment to support ways to optimise zebrafish health and well-being in the laboratory, and in turn the quality of scientific data produced. We advocate that the conditions under which zebrafish are maintained need to become a more integral part of research and that we understand more fully how they influence experimental outcome and in turn interpretations of the data generated.
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Affiliation(s)
- Carole J. Lee
- Biosciences, Geoffrey Pope BuildingUniversity of ExeterStocker RoadExeterEX4 4QDU.K.
| | - Gregory C. Paull
- Biosciences, Geoffrey Pope BuildingUniversity of ExeterStocker RoadExeterEX4 4QDU.K.
| | - Charles R. Tyler
- Biosciences, Geoffrey Pope BuildingUniversity of ExeterStocker RoadExeterEX4 4QDU.K.
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14
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Reduced physiological plasticity in a fish adapted to stable temperatures. Proc Natl Acad Sci U S A 2022; 119:e2201919119. [PMID: 35617428 DOI: 10.1073/pnas.2201919119] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Significance Plastic individuals can buffer environmental changes, maintaining a stable performance across gradients. Plasticity is therefore thought to be particularly beneficial for the survival of wild populations that experience large environmental fluctuations, such as diel and seasonal temperature changes. Maintaining plasticity is widely assumed to be costly; however, empirical evidence demonstrating this cost is scarce. Here, we predict that if plasticity is costly, it would be readily lost in a stable environment, such as a laboratory. To test this, we measured a diverse range of phenotypic traits, spanning gene expression, physiology, and behavior, in wild and laboratory zebrafish acclimated to 15 temperatures. We show that laboratory fish have lost plasticity in many traits, demonstrating that maintaining plasticity carries a cost.
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15
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Onarheim T, Janczak AM, Nordgreen J. The Effects of Social vs. Individual Housing of Zebrafish on Whole-Body Cortisol and Behavior in Two Tests of Anxiety. Front Vet Sci 2022; 9:859848. [PMID: 35433896 PMCID: PMC9009241 DOI: 10.3389/fvets.2022.859848] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 02/18/2022] [Indexed: 11/21/2022] Open
Abstract
Two of the most used models of anxiety in zebrafish research, the novel tank-diving test (NTDT) and the black-white preference test (BWPT), are modifications of assays used in rodent research (open field test and light/dark test). There has been a thorough validation of these tests in rodents, but a similar level of knowledge is still missing in zebrafish. Adult zebrafish naturally live in shoals with conspecifics, and group housing is therefore assumed to be the optimal housing condition for zebrafish, as it allows for shoaling behavior. This study investigated how housing in social isolation affected whole-body cortisol and the behavioral responses in the NTDT and BWPT. We also examined the correlation between the behavioral responses in the two behavioral tests. We found that zebrafish housed in groups had significantly higher whole-body cortisol than individually housed zebrafish (F1, 85 = 25.51, P < 0.0001). Regardless of treatment, all groups had a general preference for the lower compartment in the NTDT and the black compartment in the BWPT. Individually housed zebrafish had a higher total number of entries to the white compartment in BWPT compared to group housed zebrafish when their first test was BWPT (F1, 48 = 5.79, P = 0.0201), but not when BWPT was their second behavioral test. Fish that had higher whole-body cortisol had a tendency toward fewer entries into the white compartment the first 3 min of the BWPT (F1, 48 = 3.90, P = 0.0540). There was no effect of housing on the behaviors registered in the NTDT. There was a positive correlation (correlation coefficient 0.40; p = 0.003) between transitions from black to white compartment in BWPT and transitions from lower to upper compartment in NTDT, but we did not find any association between duration in white compartment in BWPT and upper compartment in NTDT. Considering this, we suggest that further model validation is needed.
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Affiliation(s)
- Tuva Onarheim
- Department of Production Animal Clinical Sciences, Faculty of Veterinary Medicine, Norwegian University of Life Science, Oslo, Norway
| | - Andrew M. Janczak
- Department of Production Animal Clinical Sciences, Faculty of Veterinary Medicine, Norwegian University of Life Science, Oslo, Norway
| | - Janicke Nordgreen
- Department of Paraclinical Sciences, Faculty of Veterinary Medicine, Norwegian University of Life Science, Oslo, Norway
- *Correspondence: Janicke Nordgreen
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16
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Vossen LE, Brunberg R, Rådén P, Winberg S, Roman E. The zebrafish Multivariate Concentric Square Field: A Standardized Test for Behavioral Profiling of Zebrafish (Danio rerio). Front Behav Neurosci 2022; 16:744533. [PMID: 35368300 PMCID: PMC8968638 DOI: 10.3389/fnbeh.2022.744533] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 01/31/2022] [Indexed: 11/13/2022] Open
Abstract
The zebrafish (Danio rerio) is an important model organism in the study of the neurobiological basis of human mental disorders. Yet the utility of this species is limited by the quality of the phenotypical characterization tools available. Here, we present a complex testing environment for the quantification of explorative behavior in adult zebrafish, the zebrafish Multivariate Concentric Square Field™ (zMCSF), adapted from the rodent equivalent that has been used in > 40 studies. The apparatus consists of a central open area which is surrounded by a dark corner with a roof (DCR), corridors, and an inclined ramp. These areas differ in illumination, water depth, and are sheltered or exposed to different degrees. We quantified behavior of male and female wild-caught and AB strain zebrafish in the zMCSF (day 1) and cross-validated these results using the novel tank diving test (NTDT) (day 2). To assess the effect of repeated testing, AB zebrafish we tested a second time in both tests 1 week later (on days 7 and 8). We detected strong differences between the strains, with wild zebrafish swimming faster and spending more time in the corridors and on the ramp, while they avoided the open area in the center. AB zebrafish were less hesitant to enter the center but avoided the ramp, and often left one or more zones unexplored. No major sex differences in exploratory behavior were detected in either strain, except for a slightly higher velocity of AB males which has been reported before. Importantly, the zMCSF was largely resilient to repeated testing. The diving test revealed only one difference confined to one sex; wild females paid more visits to the top third than AB females. In isolation, this finding could lead to the conclusion that wild zebrafish are more risk-taking, which is incorrect given this strain’s avoidance of open areas. To conclude, our results suggest that the zMCSF presents a sophisticated behavioral tool that can distinguish between different magnitudes and types of risk, allowing the user to create an intricate behavioral profile of individual adult zebrafish.
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Affiliation(s)
- Laura E. Vossen
- Division of Anatomy and Physiology, Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
- *Correspondence: Laura E. Vossen,
| | - Ronja Brunberg
- Neuropharmacology, Addiction and Behavior, Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | - Pontus Rådén
- Neuropharmacology, Addiction and Behavior, Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | - Svante Winberg
- Behavioral Neuroendocrinology, Department of Neuroscience, Uppsala University, Uppsala, Sweden
- Behavioral Neuroendocrinology, Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
| | - Erika Roman
- Division of Anatomy and Physiology, Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
- Neuropharmacology, Addiction and Behavior, Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
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17
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Clifford AM, Tresguerres M, Goss GG, Wood CM. A novel K + -dependent Na + uptake mechanism during low pH exposure in adult zebrafish (Danio rerio): New tricks for old dogma. Acta Physiol (Oxf) 2022; 234:e13777. [PMID: 34985194 DOI: 10.1111/apha.13777] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 09/27/2021] [Accepted: 01/01/2022] [Indexed: 12/16/2022]
Abstract
AIM To determine whether Na+ uptake in adult zebrafish (Danio rerio) exposed to acidic water adheres to traditional models reliant on Na+ /H+ Exchangers (NHEs), Na+ channels and Na+ /Cl- Cotransporters (NCCs) or if it occurs through a novel mechanism. METHODS Zebrafish were exposed to control (pH 8.0) or acidic (pH 4.0) water for 0-12 hours during which 22 Na+ uptake ( J Na in ), ammonia excretion, net acidic equivalent flux and net K+ flux ( J H net ) were measured. The involvement of NHEs, Na+ channels, NCCs, K+ -channels and K+ -dependent Na+ /Ca2+ exchangers (NCKXs) was evaluated by exposure to Cl- -free or elevated [K+ ] water, or to pharmacological inhibitors. The presence of NCKXs in gill was examined using RT-PCR. RESULTS J Na in was strongly attenuated by acid exposure, but gradually recovered to control rates. The systematic elimination of each of the traditional models led us to consider K+ as a counter substrate for Na+ uptake during acid exposure. Indeed, elevated environmental [K+ ] inhibited J Na in during acid exposure in a concentration-dependent manner, with near-complete inhibition at 10 mM. Moreover, J H net loss increased approximately fourfold at 8-10 hours of acid exposure which correlated with recovered J Na in in 1:1 fashion, and both J Na in and J H net were sensitive to tetraethylammonium (TEA) during acid exposure. Zebrafish gills expressed mRNA coding for six NCKX isoforms. CONCLUSIONS During acid exposure, zebrafish engage a novel Na+ uptake mechanism that utilizes the outwardly directed K+ gradient as a counter-substrate for Na+ and is sensitive to TEA. NKCXs are promising candidates to mediate this K+ -dependent Na+ uptake, opening new research avenues about Na+ uptake in zebrafish and other acid-tolerant aquatic species.
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Affiliation(s)
- Alexander M. Clifford
- Department of Zoology University of British Columbia Vancouver British Columbia Canada
- Marine Biology Research Division Scripps Institution of Oceanography University of California San Diego La Jolla California USA
| | - Martin Tresguerres
- Marine Biology Research Division Scripps Institution of Oceanography University of California San Diego La Jolla California USA
| | - Greg G. Goss
- Department of Biological Sciences University of Alberta Edmonton Alberta Canada
| | - Chris M. Wood
- Department of Zoology University of British Columbia Vancouver British Columbia Canada
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18
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Magalhães ALB, Brito MFG, Silva LGM. The fluorescent introduction has begun in the southern hemisphere: presence and life-history strategies of the transgenic zebrafish Danio rerio (Cypriniformes: Danionidae) in Brazil. STUDIES ON NEOTROPICAL FAUNA AND ENVIRONMENT 2022. [DOI: 10.1080/01650521.2021.2024054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- André Lincoln Barroso Magalhães
- PPG Tecnologias para o Desenvolvimento Sustentável, Universidade Federal de São João Del Rei, Ouro Branco, Minas Gerais, Brazil
| | | | - Luiz Gustavo Martins Silva
- PPG Tecnologias para o Desenvolvimento Sustentável, Universidade Federal de São João Del Rei, Ouro Branco, Minas Gerais, Brazil
- Stocker Lab, Institute of Environmental Engineering, Zurich, Switzerland
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19
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Regulation of collagen deposition in the trout heart during thermal acclimation. Curr Res Physiol 2022; 5:99-108. [PMID: 35243359 PMCID: PMC8857596 DOI: 10.1016/j.crphys.2022.02.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 01/21/2022] [Accepted: 02/07/2022] [Indexed: 11/22/2022] Open
Abstract
The passive mechanical properties of the vertebrate heart are controlled in part by the composition of the extracellular matrix (ECM). Changes in the ECM, caused by increased blood pressure, injury or disease can affect the capacity of the heart to fill with blood during diastole. In mammalian species, cardiac fibrosis caused by an increase in collagen in the ECM, leads to a loss of heart function and these changes in composition are considered to be permanent. Recent work has demonstrated that the cardiac ventricle of some fish species have the capacity to both increase and decrease collagen content in response to thermal acclimation. It is thought that these changes in collagen content help maintain ventricle function over seasonal changes in environmental temperatures. This current work reviews the cellular mechanisms responsible for regulating collagen deposition in the mammalian heart and proposes a cellular pathway by which a change in temperature can affect the collagen content of the fish ventricle through mechanotransduction. This work specifically focuses on the role of transforming growth factor β1, MAPK signaling pathways, and biomechanical stretch in regulating collagen content in the fish ventricle. It is hoped that this work increases the appreciation of the use of comparative models to gain insight into phenomenon with biomedical relevance.
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20
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Suriyampola PS, Iruri‐Tucker AA, Padilla‐Veléz L, Enriquez A, Shelton DS, Martins EP. Small increases in group size improve small shoals' response to water flow in zebrafish. J Zool (1987) 2021; 316:271-281. [PMID: 35814943 PMCID: PMC9269864 DOI: 10.1111/jzo.12952] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Social context may influence the perception of sensory cues and the ability to display refined behavioral responses. Previous work suggests that effective responses to environmental cues can be contingent on having a sufficient number of individuals in a group. Thus, the changes in group size may have profound impacts, particularly on the behavior of small social groups. Using zebrafish (Danio rerio), here we examined how changes in group size influence the ability to respond to changes in water flow. We found that fish in relatively larger groups displayed stronger rheotaxis even when comparing pairs of fish with groups of four fish, indicating that a small increase in group size can enhance the responsiveness to environmental change. Individual fish in relatively larger groups also spent less time in the energetically costly leading position compared to individuals in pairs, indicating that even a small increase in group size may provide energetic benefits. We also found that the shoal cohesion was dependent on the size of the group but within a given group size, shoal cohesion did not vary with flow rate. Our study highlights that even a small change in group size could significantly affect the way social fish respond to the changes in water flow, which could be an important attribute that shapes the resilience of social animals in changing environments.
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Affiliation(s)
- P. S. Suriyampola
- School of Life Sciences Arizona State University Tempe AZ USA
- Department of Biology and Center for the Integrative Study of Animal Behavior Indiana University Bloomington IN USA
| | - A. A. Iruri‐Tucker
- Department of Biology and Center for the Integrative Study of Animal Behavior Indiana University Bloomington IN USA
| | - L. Padilla‐Veléz
- Department of Biology and Center for the Integrative Study of Animal Behavior Indiana University Bloomington IN USA
| | - A. Enriquez
- Department of Biology and Center for the Integrative Study of Animal Behavior Indiana University Bloomington IN USA
| | - D. S. Shelton
- Environmental and Molecular Toxicology Oregon State University Corvallis OR USA
| | - E. P. Martins
- School of Life Sciences Arizona State University Tempe AZ USA
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21
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Hageter J, Waalkes M, Starkey J, Copeland H, Price H, Bays L, Showman C, Laverty S, Bergeron SA, Horstick EJ. Environmental and Molecular Modulation of Motor Individuality in Larval Zebrafish. Front Behav Neurosci 2021; 15:777778. [PMID: 34938167 PMCID: PMC8685292 DOI: 10.3389/fnbeh.2021.777778] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 11/17/2021] [Indexed: 11/21/2022] Open
Abstract
Innate behavioral biases such as human handedness are a ubiquitous form of inter-individual variation that are not strictly hardwired into the genome and are influenced by diverse internal and external cues. Yet, genetic and environmental factors modulating behavioral variation remain poorly understood, especially in vertebrates. To identify genetic and environmental factors that influence behavioral variation, we take advantage of larval zebrafish light-search behavior. During light-search, individuals preferentially turn in leftward or rightward loops, in which directional bias is sustained and non-heritable. Our previous work has shown that bias is maintained by a habenula-rostral PT circuit and genes associated with Notch signaling. Here we use a medium-throughput recording strategy and unbiased analysis to show that significant individual to individual variation exists in wildtype larval zebrafish turning preference. We classify stable left, right, and unbiased turning types, with most individuals exhibiting a directional preference. We show unbiased behavior is not due to a loss of photo-responsiveness but reduced persistence in same-direction turning. Raising larvae at elevated temperature selectively reduces the leftward turning type and impacts rostral PT neurons, specifically. Exposure to conspecifics, variable salinity, environmental enrichment, and physical disturbance does not significantly impact inter-individual turning bias. Pharmacological manipulation of Notch signaling disrupts habenula development and turn bias individuality in a dose dependent manner, establishing a direct role of Notch signaling. Last, a mutant allele of a known Notch pathway affecter gene, gsx2, disrupts turn bias individuality, implicating that brain regions independent of the previously established habenula-rostral PT likely contribute to inter-individual variation. These results establish that larval zebrafish is a powerful vertebrate model for inter-individual variation with established neural targets showing sensitivity to specific environmental and gene signaling disruptions. Our results provide new insight into how variation is generated in the vertebrate nervous system.
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Affiliation(s)
- John Hageter
- Department of Biology, West Virginia University, Morgantown, WV, United States
| | - Matthew Waalkes
- Department of Biology, West Virginia University, Morgantown, WV, United States
| | - Jacob Starkey
- Department of Biology, West Virginia University, Morgantown, WV, United States
| | - Haylee Copeland
- Department of Biology, West Virginia University, Morgantown, WV, United States
| | - Heather Price
- Department of Biology, West Virginia University, Morgantown, WV, United States
| | - Logan Bays
- Department of Biology, West Virginia University, Morgantown, WV, United States
| | - Casey Showman
- Department of Biology, West Virginia University, Morgantown, WV, United States
| | - Sean Laverty
- Department of Mathematics and Statistics, University of Central Oklahoma, Edmond, OK, United States
| | - Sadie A. Bergeron
- Department of Biology, West Virginia University, Morgantown, WV, United States
- Department of Neuroscience, West Virginia University, Morgantown, WV, United States
| | - Eric J. Horstick
- Department of Biology, West Virginia University, Morgantown, WV, United States
- Department of Neuroscience, West Virginia University, Morgantown, WV, United States
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22
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Hamilton TJ, Radke NH, Bajwa J, Chaput S, Tresguerres M. The dose makes the poison: Non-linear behavioural response to CO 2-induced aquatic acidification in zebrafish (Danio rerio). THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 778:146320. [PMID: 33725593 DOI: 10.1016/j.scitotenv.2021.146320] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 02/25/2021] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
CO2-induced aquatic acidification is predicted to affect fish neuronal GABAA receptors leading to widespread behavioural alterations. However, the large variability in the magnitude and direction of behavioural responses suggests substantial species-specific CO2 threshold differences, life history and parental acclimation effects, experimental artifacts, or a combination of these factors. As an established model organism, zebrafish (Danio rerio) can be reared under stable conditions for multiple generations, which may help control for some of the variability observed in wild-caught fishes. Here, we used two standardized tests to investigate the effect of 1-week acclimatization to four pCO2 levels on zebrafish anxiety-like behaviour, exploratory behaviour, and locomotion. Fish acclimatized to 900 μatm CO2 demonstrated increased anxiety-like behaviour compared to control fish (~480 μatm), however, the behaviour of fish exposed to 2200 μatm CO2 was indistinguishable from that of controls. In addition, fish acclimatized to 4200 μatm CO2 had decreased anxiety-like behaviour; i.e. the opposite response than the 900 μatm CO2 treatment. On the other hand, exploratory behaviour did not differ among any of the pCO2 exposures that were tested. Thus, zebrafish behavioural responses to elevated pCO2 are not linear; with potential important implications for physiological, environmental, and aquatic acidification studies.
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Affiliation(s)
- Trevor J Hamilton
- Department of Psychology, MacEwan University, Edmonton, AB, Canada; Neuroscience and Mental Health Institute, University of Alberta, Edmonton, AB T6G 2H7, Canada.
| | | | - Jasmin Bajwa
- Department of Psychology, MacEwan University, Edmonton, AB, Canada
| | - Shayna Chaput
- Department of Psychology, MacEwan University, Edmonton, AB, Canada
| | - Martin Tresguerres
- Marine Biology Research Division, Scripps Institution of Oceanography, University of California San Diego, USA.
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Stevens CH, Reed BT, Hawkins P. Enrichment for Laboratory Zebrafish-A Review of the Evidence and the Challenges. Animals (Basel) 2021; 11:ani11030698. [PMID: 33807683 PMCID: PMC8001412 DOI: 10.3390/ani11030698] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/03/2021] [Accepted: 03/04/2021] [Indexed: 12/15/2022] Open
Abstract
Simple Summary The zebrafish is one of the most commonly used animals in scientific research, but there remains a lack of consensus over good practice for zebrafish housing and care. One such area which lacks agreement is whether laboratory zebrafish should be provided with environmental enrichment—additions or modifications to the basic laboratory environment which aim to improve welfare, such as plastic plants in tanks. The need for the provision of appropriate environmental enrichment has been recognised in other laboratory animal species, but some scientists and animal care staff are hesitant to provide enrichment for zebrafish, arguing that there is little or no evidence that enrichment can benefit zebrafish welfare. This review aims to summarise the current literature on the effects of enrichment on zebrafish physiology, behaviour and welfare, and identifies some forms of enrichment which are likely to benefit zebrafish. It also considers the possible challenges that might be associated with introducing more enrichment, and how these might be addressed. Abstract Good practice for the housing and care of laboratory zebrafish Danio rerio is an increasingly discussed topic, with focus on appropriate water quality parameters, stocking densities, feeding regimes, anaesthesia and analgesia practices, methods of humane killing, and more. One area of current attention is around the provision of environmental enrichment. Enrichment is accepted as an essential requirement for meeting the behavioural needs and improving the welfare of many laboratory animal species, but in general, provision for zebrafish is minimal. Some of those involved in the care and use of zebrafish suggest there is a ‘lack of evidence’ that enrichment has welfare benefits for this species, or cite a belief that zebrafish do not ‘need’ enrichment. Concerns are also sometimes raised around the practical challenges of providing enrichments, or that they may impact on the science being undertaken. However, there is a growing body of evidence suggesting that various forms of enrichment are preferred by zebrafish over a barren tank, and that enriched conditions can improve welfare by reducing stress and anxiety. This review explores the effects that enrichment can have on zebrafish behaviour, physiology and welfare, and considers the challenges to facilities of providing more enrichment for the zebrafish they house.
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Identification of Individual Zebrafish ( Danio rerio): A Refined Protocol for VIE Tagging Whilst Considering Animal Welfare and the Principles of the 3Rs. Animals (Basel) 2021; 11:ani11030616. [PMID: 33652779 PMCID: PMC7996851 DOI: 10.3390/ani11030616] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 02/20/2021] [Indexed: 12/16/2022] Open
Abstract
In aquatic ecology, studies have commonly employed a tagging technique known as visible implant elastomer (VIE). This method has not been widely adopted by the zebrafish research community and also lacks refinement with regard to animal welfare. The current paper introduces a new VIE tagging protocol, with the aim of improving existing tagging techniques by placing particular emphasis on the Three Rs. To improve animal welfare and fish survival, we added the use of an analgesic compound (lidocaine) through the marking procedure, followed by after-treatment with antiseptics (melaleuca, aloe vera, and PVP-I as active ingredients) to improve tissue regeneration and healing. The newly improved protocol has been quantitatively evaluated on different populations and age groups of zebrafish. This study will be useful to the scientific zebrafish community and to the wider field including biologist and aquarists, especially in consideration of animal welfare, where tagging techniques are considered as a potential noxious stimulus for fish.
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25
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Marchetto L, Barcellos LJG, Koakoski G, Soares SM, Pompermaier A, Maffi VC, Costa R, da Silva CG, Zorzi NR, Demin KA, Kalueff AV, de Alcantara Barcellos HH. Auditory environmental enrichment prevents anxiety-like behavior, but not cortisol responses, evoked by 24-h social isolation in zebrafish. Behav Brain Res 2021; 404:113169. [PMID: 33577884 DOI: 10.1016/j.bbr.2021.113169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 12/31/2020] [Accepted: 02/03/2021] [Indexed: 12/16/2022]
Abstract
The zebrafish (Danio rerio) is widely used as a promising translational model organism for studying various brain disorders. Zebrafish are also commonly used in behavioral and drug screening assays utilizing individually tested (socially isolated) fish. Various sounds represent important exogenous factors that may affect fish behavior. Mounting evidence shows that musical/auditory environmental enrichment can improve welfare of laboratory animals, including fishes. Here, we show that auditory environmental enrichment mitigates anxiogenic-like effects caused by acute 24-h social isolation in adult zebrafish. Thus, auditory environmental enrichment may offer an inexpensive, feasible and simple tool to improve welfare of zebrafish stocks in laboratory facilities, reduce unwanted procedural stress, lower non-specific behavioral variance and, hence, collectively improve zebrafish data reliability and reproducibility.
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Affiliation(s)
- Letícia Marchetto
- Veterinary Medicine Integrated Residency Program, University of Passo Fundo (UPF), BR 285, São José, Passo Fundo, RS, Brazil
| | - Leonardo J G Barcellos
- Postgraduate Program in Pharmacology, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil; Postgraduate Program in Bioexperimentation, University of Passo Fundo, Passo Fundo, Rio Grande do Sul, Brazil; Veterinary Medicine Course, University of Passo Fundo, Passo Fundo, Rio Grande do Sul, Brazil; Postgraduate Program in Environmental Sciences, University of Passo Fundo, Passo Fundo, Rio Grande do Sul, Brazil.
| | - Gessi Koakoski
- Veterinary Medicine Course, University of Passo Fundo, Passo Fundo, Rio Grande do Sul, Brazil
| | - Suelen M Soares
- Postgraduate Program in Pharmacology, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Aline Pompermaier
- Postgraduate Program in Bioexperimentation, University of Passo Fundo, Passo Fundo, Rio Grande do Sul, Brazil
| | - Victoria C Maffi
- Veterinary Medicine Course, University of Passo Fundo, Passo Fundo, Rio Grande do Sul, Brazil
| | - Roberta Costa
- Veterinary Medicine Course, University of Passo Fundo, Passo Fundo, Rio Grande do Sul, Brazil
| | - Carolina G da Silva
- Veterinary Medicine Course, University of Passo Fundo, Passo Fundo, Rio Grande do Sul, Brazil
| | - Natalie R Zorzi
- Postgraduate Program in Bioexperimentation, University of Passo Fundo, Passo Fundo, Rio Grande do Sul, Brazil
| | - Konstantin A Demin
- Institute of Experimental Medicine, Almazov Medical Research Centre, St. Petersburg, Russia; Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg, Russia; Granov Scientific Research Center for Radiology and Surgical Technologies, St. Petersburg, Russia; Biology School, Moscow Institute of Physics and Technology, Dolgoprudny, Russia; Neuroscience Program, Sirius National Technical University, Sochi, Russia
| | - Allan V Kalueff
- School of Pharmacy, Southwest University, Chongqing, China; Ural Federal University, Ekaterinburg, Russia
| | - Heloisa H de Alcantara Barcellos
- Veterinary Medicine Integrated Residency Program, University of Passo Fundo (UPF), BR 285, São José, Passo Fundo, RS, Brazil; Veterinary Medicine Course, University of Passo Fundo, Passo Fundo, Rio Grande do Sul, Brazil.
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26
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Morgan R, Finnøen MH, Jensen H, Pélabon C, Jutfelt F. Low potential for evolutionary rescue from climate change in a tropical fish. Proc Natl Acad Sci U S A 2020; 117:33365-33372. [PMID: 33318195 PMCID: PMC7776906 DOI: 10.1073/pnas.2011419117] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Climate change is increasing global temperatures and intensifying the frequency and severity of extreme heat waves. How organisms will cope with these changes depends on their inherent thermal tolerance, acclimation capacity, and ability for evolutionary adaptation. Yet, the potential for adaptation of upper thermal tolerance in vertebrates is largely unknown. We artificially selected offspring from wild-caught zebrafish (Danio rerio) to increase (Up-selected) or decrease (Down-selected) upper thermal tolerance over six generations. Selection to increase upper thermal tolerance was also performed on warm-acclimated fish to test whether plasticity in the form of inducible warm tolerance also evolved. Upper thermal tolerance responded to selection in the predicted directions. However, compared to the control lines, the response was stronger in the Down-selected than in the Up-selected lines in which evolution toward higher upper thermal tolerance was slow (0.04 ± 0.008 °C per generation). Furthermore, the scope for plasticity resulting from warm acclimation decreased in the Up-selected lines. These results suggest the existence of a hard limit in upper thermal tolerance. Considering the rate at which global temperatures are increasing, the observed rates of adaptation and the possible hard limit in upper thermal tolerance suggest a low potential for evolutionary rescue in tropical fish living at the edge of their thermal limits.
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Affiliation(s)
- Rachael Morgan
- Department of Biology, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway;
| | - Mette H Finnøen
- Department of Biology, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
| | - Henrik Jensen
- Centre for Biodiversity Dynamics, Department of Biology, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
| | - Christophe Pélabon
- Centre for Biodiversity Dynamics, Department of Biology, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
| | - Fredrik Jutfelt
- Department of Biology, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
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27
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Color as an important biological variable in zebrafish models: Implications for translational neurobehavioral research. Neurosci Biobehav Rev 2020; 124:1-15. [PMID: 33359096 DOI: 10.1016/j.neubiorev.2020.12.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 07/05/2020] [Accepted: 12/15/2020] [Indexed: 01/03/2023]
Abstract
Color is an important environmental factor that in multiple ways affects human and animal behavior and physiology. Widely used in neuroscience research, various experimental (animal) models may help improve our understanding of how different colors impact brain and behavioral processes. Complementing laboratory rodents, the zebrafish (Danio rerio) is rapidly emerging as an important novel model species to explore complex neurobehavioral processes. The growing utility of zebrafish in biomedicine makes it timely to consider the role of colors in their behavioral and physiological responses. Here, we summarize mounting evidence implicating colors as a critical variable in zebrafish models and neurobehavioral traits, with a particular relevance to CNS disease modeling, genetic and pharmacological modulation, as well as environmental enrichment and animal welfare. We also discuss the growing value of zebrafish models to study color neurobiology and color-related neurobehavioral phenomics, and outline future directions of research in this field.
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28
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Åsheim ER, Andreassen AH, Morgan R, Jutfelt F. Rapid-warming tolerance correlates with tolerance to slow warming but not growth at non-optimal temperatures in zebrafish. J Exp Biol 2020; 223:jeb229195. [PMID: 33071218 DOI: 10.1242/jeb.229195] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 10/12/2020] [Indexed: 12/16/2022]
Abstract
Global warming is predicted to increase both acute and prolonged thermal challenges for aquatic ectotherms. Severe short- and medium-term thermal stress over hours to days may cause mortality, while longer sub-lethal thermal challenges may cause performance declines. The inter-relationship between the responses to short, medium and longer thermal challenges is unresolved. We asked if the same individuals are tolerant to both rapid and slow warming challenges, a question that has so far received little attention. Additionally, we investigated the possibility of a thermal syndrome where individuals in a population are distributed along a warm-type to cold-type axis. We tested whether different thermal traits correlate across individuals by acclimating 200 juvenile zebrafish (Danio rerio) to sub- or supra-optimal temperatures for growth (22 and 34°C) for 40 days and measuring growth and thermal tolerance at two different warming rates. We found that tolerance to rapid warming correlated with tolerance to slow warming in the 22°C treatment. However, individual tolerance to neither rapid nor slow warming correlated with growth at the supra-optimal temperature. We thus find some support for a syndrome-like organisation of thermal traits, but the lack of connection between tolerance and growth performance indicates a restricted generality of a thermal syndrome. The results suggest that tolerance to rapid warming may share underlying physiological mechanisms with tolerance to slower heating, and indicate that the relevance of acute critical thermal tolerance extends beyond the rapid ramping rates used to measure them.
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Affiliation(s)
- Eirik R Åsheim
- Department of Biology, Norwegian University of Science and Technology, 7491 Trondheim, Norway
- Organismal and Evolutionary Biology Research Programme, Institute of Biotechnology, University of Helsinki, 00014 Helsinki, Finland
| | - Anna H Andreassen
- Department of Biology, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Rachael Morgan
- Department of Biology, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Fredrik Jutfelt
- Department of Biology, Norwegian University of Science and Technology, 7491 Trondheim, Norway
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29
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Raby L, Völkel P, Le Bourhis X, Angrand PO. Genetic Engineering of Zebrafish in Cancer Research. Cancers (Basel) 2020; 12:cancers12082168. [PMID: 32759814 PMCID: PMC7464884 DOI: 10.3390/cancers12082168] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 07/30/2020] [Accepted: 07/31/2020] [Indexed: 12/19/2022] Open
Abstract
Zebrafish (Danio rerio) is an excellent model to study a wide diversity of human cancers. In this review, we provide an overview of the genetic and reverse genetic toolbox allowing the generation of zebrafish lines that develop tumors. The large spectrum of genetic tools enables the engineering of zebrafish lines harboring precise genetic alterations found in human patients, the generation of zebrafish carrying somatic or germline inheritable mutations or zebrafish showing conditional expression of the oncogenic mutations. Comparative transcriptomics demonstrate that many of the zebrafish tumors share molecular signatures similar to those found in human cancers. Thus, zebrafish cancer models provide a unique in vivo platform to investigate cancer initiation and progression at the molecular and cellular levels, to identify novel genes involved in tumorigenesis as well as to contemplate new therapeutic strategies.
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30
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Shelton DS, Shelton SG, Daniel DK, Raja M, Bhat A, Tanguay RL, Higgs DM, Martins EP. Collective Behavior in Wild Zebrafish. Zebrafish 2020; 17:243-252. [PMID: 32513074 DOI: 10.1089/zeb.2019.1851] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Anthropogenic change is expected to alter environments at alarming rates. To predict the impact of modified environments on social behavior, we must study the relationship between environmental features and collective behavior in a genetically tractable model, zebrafish (Danio rerio). Here, we conducted a field study to examine the relationship between salient environmental features and collective behavior in four populations of zebrafish. We found zebrafish in flowing water formed volatile groups, whereas those in still water had more consistent membership and leadership. Groups in fast-flowing water were large (up to 2000 fish) and tightly knit with short nearest neighbor distances, whereas group sizes were smaller (11 fish/group) with more space between individual fish in still and slow-flowing water. These observations point to a possible profound role of water flow in influencing collective behavior in wild zebrafish.
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Affiliation(s)
- Delia S Shelton
- Environmental and Molecular Toxicology, Sinnhuber Aquatic Research Laboratory, Oregon State University, Corvallis, Oregon, USA.,Leibniz Institute for Freshwater Ecology and Inland Fisheries, Berlin, Germany.,Department of Biological Sciences, University of Windsor, Windsor, Canada
| | | | - Danita K Daniel
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India
| | - Manickam Raja
- Department of Biomedical Engineering, The Kavery College of Engineering, Salem, India
| | - Anuradha Bhat
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India
| | - Robyn L Tanguay
- Environmental and Molecular Toxicology, Sinnhuber Aquatic Research Laboratory, Oregon State University, Corvallis, Oregon, USA
| | - Dennis M Higgs
- Department of Biological Sciences, University of Windsor, Windsor, Canada
| | - Emília P Martins
- School of Life Sciences, Arizona State University, Tempe, Arizona, USA
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