1
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Leeuwis RHJ, Hall JR, Zanuzzo FS, Smith N, Clow KA, Kumar S, Vasquez I, Goetz FW, Johnson SC, Rise ML, Santander J, Gamperl AK. Climate change can impair bacterial pathogen defences in sablefish via hypoxia-mediated effects on adaptive immunity. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2024; 156:105161. [PMID: 38521379 DOI: 10.1016/j.dci.2024.105161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 03/13/2024] [Accepted: 03/13/2024] [Indexed: 03/25/2024]
Abstract
Low-oxygen levels (hypoxia) in aquatic habitats are becoming more common because of global warming and eutrophication. However, the effects on the health/disease status of fishes, the world's largest group of vertebrates, are unclear. Therefore, we assessed how long-term hypoxia affected the immune function of sablefish, an ecologically and economically important North Pacific species, including the response to a formalin-killed Aeromonas salmonicida bacterin. Sablefish were held at normoxia or hypoxia (100% or 40% air saturated seawater, respectively) for 6-16 weeks, while we measured a diverse array of immunological traits. Given that the sablefish is a non-model organism, this involved the development of a species-specific methodological toolbox comprised of qPCR primers for 16 key immune genes, assays for blood antibacterial defences, the assessment of blood immunoglobulin (IgM) levels with ELISA, and flow cytometry and confocal microscopy techniques. We show that innate immune parameters were typically elevated in response to the bacterial antigens, but were not substantially affected by hypoxia. In contrast, hypoxia completely prevented the ∼1.5-fold increase in blood IgM level that was observed under normoxic conditions following bacterin exposure, implying a serious impairment of adaptive immunity. Since the sablefish is naturally hypoxia tolerant, our results demonstrate that climate change-related deoxygenation may be a serious threat to the immune competency of fishes.
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Affiliation(s)
- Robine H J Leeuwis
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, A1C 5S7, Canada.
| | - Jennifer R Hall
- Aquatic Research Cluster, CREAIT Network, Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, A1C 5S7, Canada
| | - Fábio S Zanuzzo
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, A1C 5S7, Canada
| | - Nicole Smith
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, A1C 5S7, Canada
| | - Kathy A Clow
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, A1C 5S7, Canada
| | - Surendra Kumar
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, A1C 5S7, Canada
| | - Ignacio Vasquez
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, A1C 5S7, Canada
| | - Frederick W Goetz
- School of Freshwater Sciences, University of Wisconsin-Milwaukee, Milwaukee, WI, 53204, USA
| | - Stewart C Johnson
- Pacific Biological Station, Department of Fisheries and Oceans, Nanaimo, BC, V9T 6N7, Canada
| | - Matthew L Rise
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, A1C 5S7, Canada
| | - Javier Santander
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, A1C 5S7, Canada
| | - A Kurt Gamperl
- Department of Ocean Sciences, Memorial University of Newfoundland, St. John's, NL, A1C 5S7, Canada
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2
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Nakagawa S, Lagisz M. Next steps after airing disagreement on a scientific issue with policy implications: a meta-analysis, multi-lab replication and adversarial collaboration. BMC Biol 2023; 21:116. [PMID: 37217976 DOI: 10.1186/s12915-023-01567-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 03/16/2023] [Indexed: 05/24/2023] Open
Abstract
Canadian policymakers are interested in determining whether farmed Atlantic salmon, frequently infected with Piscine orthoreovirus (PRV), may threaten wild salmon populations in the Pacific Northwest. A relevant work has been published in BMC Biology by Polinksi and colleagues, but their conclusion that PRV has a negligible impact on the energy expenditure and respiratory performance of sockeye salmon is disputed by Mordecai and colleagues, whose re-analysis is presented in a correspondence article. So, what is the true effect and what should follow this unresolved dispute? We suggest a 'registered multi-lab replication with adversaries'.
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Affiliation(s)
- Shinichi Nakagawa
- Evolution & Ecology Research Centre and School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, 2052, Australia.
- Theoretical Sciences Visiting Program, Okinawa Institute of Science and Technology Graduate University, Onna, 904-0495, Japan.
| | - Malgorzata Lagisz
- Evolution & Ecology Research Centre and School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
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3
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Polinski MP, Zhang Y, Morrison PR, Marty GD, Brauner CJ, Farrell AP, Garver KA. Response to "Assessing the role of Piscine orthoreovirus in disease and the associated risk for wild Pacific salmon". BMC Biol 2023; 21:115. [PMID: 37208671 DOI: 10.1186/s12915-023-01600-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 04/13/2023] [Indexed: 05/21/2023] Open
Affiliation(s)
- Mark P Polinski
- U.S. Department of Agriculture - Agriculture Research Service, National Coldwater Marine Aquaculture Center, Orono, ME, 04469, USA.
| | - Yangfan Zhang
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA, 02138, USA
| | - Phillip R Morrison
- Biology Department and Department of Resource Management and Protection, Vancouver Island University, Nanaimo, BC, V9R5S5, Canada
| | - Gary D Marty
- Animal Health Centre, Ministry of Agriculture and Food, Abbotsford, BC, V3G2M3, Canada
| | - Colin J Brauner
- Department of Zoology, University of British Columbia, Vancouver, BC, V6T1Z4, Canada
| | - Anthony P Farrell
- Faculty of Land and Food Systems, University of British Columbia, Vancouver, BC, V6T1z4, Canada
| | - Kyle A Garver
- Pacific Biological Station, Fisheries and Oceans Canada, Nanaimo, BC, V9T6N7, Canada
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Mordecai G, Bass AL, Routledge R, Di Cicco E, Teffer A, Deeg C, Bateman AW, Miller KM. Assessing the role of Piscine orthoreovirus in disease and the associated risk for wild Pacific salmon. BMC Biol 2023; 21:114. [PMID: 37208758 DOI: 10.1186/s12915-023-01548-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 02/20/2023] [Indexed: 05/21/2023] Open
Abstract
This paper is a response to Polinski, M. P. et al. Innate antiviral defense demonstrates high energetic efficiency in a bony fish. BMC Biology 19, 138 (2021). https://doi.org/10.1186/s12915-021-01069-2.
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Affiliation(s)
- Gideon Mordecai
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC, Canada.
| | - Arthur L Bass
- Pacific Salmon Ecology and Conservation Laboratory, Department of Forest and Conservation Sciences University of British Columbia, Vancouver, BC, Canada
- Pacific Biological Station, Fisheries and Oceans Canada, Nanaimo, BC, Canada
| | - Rick Routledge
- Department of Statistics and Actuarial Science, Simon Fraser University, Burnaby, BC, Canada
| | | | - Amy Teffer
- Department of Environmental Conservation, University of Massachusetts Amherst, Amherst, MA, 01003, USA
| | - Christoph Deeg
- Pacific Salmon Foundation, Vancouver, BC, Canada
- Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Andrew W Bateman
- Pacific Salmon Foundation, Vancouver, BC, Canada
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada
| | - Kristina M Miller
- Pacific Biological Station, Fisheries and Oceans Canada, Nanaimo, BC, Canada
- Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, BC, Canada
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5
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Wang Y, Bass AL, Hinch SG, Li S, Di Cicco E, Kaukinen KH, Ferguson H, Ming TJ, Patterson DA, Miller KM. Infectious agents and their physiological correlates in early marine Chinook salmon ( Oncorhynchus tshawytscha). CONSERVATION PHYSIOLOGY 2023; 11:coad031. [PMID: 37701371 PMCID: PMC10494280 DOI: 10.1093/conphys/coad031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 03/27/2023] [Accepted: 04/24/2023] [Indexed: 09/14/2023]
Abstract
The early marine life of Pacific salmon is believed to be a critical period limiting population-level survival. Recent evidence suggests that some infectious agents are associated with survival but linkages with underlying physiological mechanisms are lacking. While challenge studies can demonstrate cause and effect relationships between infection and pathological change or mortality, in some cases pathological change may only manifest in the presence of environmental stressors; thus, it is important to gain context from field observations. Herein, we examined physiological correlates with infectious agent loads in Chinook salmon during their first ocean year. We measured physiology at the molecular (gene expression), metabolic (plasma chemistry) and cellular (histopathology) levels. Of 46 assayed infectious agents, 27 were detected, including viruses, bacteria and parasites. This exploratory study identified. a strong molecular response to viral disease and pathological change consistent with jaundice/anemia associated with Piscine orthoreovirus,strong molecular signals of gill inflammation and immune response associated with gill agents `Candidatus Branchiomonas cysticola' and Parvicapsula pseudobranchicola,a general downregulation of gill immune response associated with Parvicapsula minibicornis complementary to that of P. pseudobranchicola.Importantly, our study provides the first evidence that the molecular activation of viral disease response and the lesions observed during the development of the PRV-related disease jaundice/anemia in farmed Chinook salmon are also observed in wild juvenile Chinook salmon.
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Affiliation(s)
- Yuwei Wang
- Forest and Conservation Sciences, University of British Columbia, 3041-2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada
| | - Arthur L Bass
- Forest and Conservation Sciences, University of British Columbia, 3041-2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada
- Pacific Biological Station, Fisheries and Oceans Canada, 3190 Hammond Bay Rd, Nanaimo, BC, V9T 6N7, Canada
| | - Scott G Hinch
- Forest and Conservation Sciences, University of British Columbia, 3041-2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada
| | - Shaorong Li
- Pacific Biological Station, Fisheries and Oceans Canada, 3190 Hammond Bay Rd, Nanaimo, BC, V9T 6N7, Canada
| | - Emiliano Di Cicco
- Pacific Salmon Foundation, 1682 W 7th Ave, Vancouver, BC, V6J 4S6, Canada
| | - Karia H Kaukinen
- Pacific Biological Station, Fisheries and Oceans Canada, 3190 Hammond Bay Rd, Nanaimo, BC, V9T 6N7, Canada
| | - Hugh Ferguson
- School of Veterinary Medicine, St. George’s University, University Centre Grenada, W. Indies, Grenada
| | - Tobi J Ming
- Pacific Biological Station, Fisheries and Oceans Canada, 3190 Hammond Bay Rd, Nanaimo, BC, V9T 6N7, Canada
| | - David A Patterson
- Fisheries and Oceans Canada, School of Resource and Environmental Mangement, Simon Fraser University, Science Branch, 643A Science Rd, Burnaby, BC, V5A 1S6, Canada
| | - Kristina M Miller
- Forest and Conservation Sciences, University of British Columbia, 3041-2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada
- Pacific Biological Station, Fisheries and Oceans Canada, 3190 Hammond Bay Rd, Nanaimo, BC, V9T 6N7, Canada
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6
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Polinski MP, Zhang Y, Morrison PR, Marty GD, Brauner CJ, Farrell AP, Garver KA. Author Correction: Innate antiviral defense demonstrates high energetic efficiency in a bony fish. BMC Biol 2023; 21:112. [PMID: 37208669 DOI: 10.1186/s12915-023-01594-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2023] Open
Affiliation(s)
- Mark P Polinski
- Fisheries and Oceans Canada Pacific Biological Station, 3190 Hammond Bay Road, Nanaimo, V9T6N7, Canada.
| | - Yangfan Zhang
- Faculty of Land and Food Systems, University of British Columbia, MCML 344-2357 Main Mall, Vancouver, V6T1Z4, Canada
| | - Phillip R Morrison
- Department of Zoology, University of British Columbia, 6270 University Blvd, Vancouver, V6T1Z4, Canada
| | - Gary D Marty
- Animal Health Centre, Ministry of Agriculture, Food and Fisheries, 1767 Angus Campbell Rd, Abbotsford, V3G2M3, Canada
| | - Colin J Brauner
- Department of Zoology, University of British Columbia, 6270 University Blvd, Vancouver, V6T1Z4, Canada
| | - Anthony P Farrell
- Faculty of Land and Food Systems, University of British Columbia, MCML 344-2357 Main Mall, Vancouver, V6T1Z4, Canada
- Department of Zoology, University of British Columbia, 6270 University Blvd, Vancouver, V6T1Z4, Canada
| | - Kyle A Garver
- Fisheries and Oceans Canada Pacific Biological Station, 3190 Hammond Bay Road, Nanaimo, V9T6N7, Canada.
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Morrison PR, Bernal D, Sepulveda CA, Brauner CJ. The effect of temperature on haemoglobin-oxygen binding affinity in regionally endothermic and ectothermic sharks. J Exp Biol 2023; 226:286204. [PMID: 36576038 DOI: 10.1242/jeb.244979] [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: 09/07/2022] [Accepted: 12/20/2022] [Indexed: 12/29/2022]
Abstract
Haemoglobin (Hb)-O2 binding affinity typically decreases with increasing temperature, but several species of ectothermic and regionally endothermic fishes exhibit reduced Hb thermal sensitivity. Regionally endothermic sharks, including the common thresher shark (Alopias vulpinus) and lamnid sharks such as the shortfin mako shark (Isurus oxyrinchus), can maintain select tissues and organs warmer than ambient temperature by retaining metabolic heat with vascular heat exchangers. In the ectothermic bigeye thresher shark (Alopias superciliosus), diurnal movements above and below the thermocline subject the tissues, including the blood, to a wide range of operating temperatures. Therefore, blood-O2 transport must occur across internal temperature gradients in regionally endothermic species, and over the range of environmental temperatures encountered by the ectothermic bigeye thresher shark. While previous studies have shown temperature-independent Hb-O2 affinity in lamnid sharks, including shortfin mako, the Hb-O2 affinity of the common and bigeye thresher sharks is unknown. Therefore, we examined the effect of temperature on whole-blood Hb-O2 affinity in common thresher shark and bigeye thresher shark. For comparison, analyses were also conducted on the shortfin mako shark and two ectothermic species, blue shark (Prionace glauca) and spiny dogfish (Squalus acanthias). Blood-O2 binding affinity was temperature independent for common thresher shark and shortfin mako shark, which should prevent internal temperature gradients from negatively affecting blood-O2 transport. Blue shark and spiny dogfish blood-O2 affinity decreased with increasing temperature, as expected, but bigeye thresher shark blood exhibited both a reduced temperature dependence and a high Hb-O2 affinity, which likely prevents large changes in environment temperature and low environmental oxygen from affecting O2 uptake.
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Affiliation(s)
- Phillip R Morrison
- Department of Zoology, University of British Columbia, Vancouver, BC, Canada, V6T 1Z4
| | - Diego Bernal
- Department of Biology, University of Massachusetts, Dartmouth, MA 02747, USA
| | | | - Colin J Brauner
- Department of Zoology, University of British Columbia, Vancouver, BC, Canada, V6T 1Z4
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8
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Campbell LJ, Castillo NA, Dunn CD, Perez A, Schmitter-Soto JJ, Mejri SC, Boucek RE, Corujo RS, Adams AJ, Rehage JS, Goldberg TL. Viruses of Atlantic Bonefish ( Albula vulpes) in Florida and the Caribbean show geographic patterns consistent with population declines. ENVIRONMENTAL BIOLOGY OF FISHES 2022; 106:303-317. [PMID: 35965638 PMCID: PMC9362051 DOI: 10.1007/s10641-022-01306-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 07/16/2022] [Indexed: 06/15/2023]
Abstract
UNLABELLED Atlantic Bonefish (Albula vulpes) are economically important due to their popularity with recreational anglers. In the State of Florida, USA, bonefish population numbers declined by approximately 60% between the 1990s and 2015. Habitat loss, water quality impairment, chemical inputs, and other anthropogenic factors have been implicated as causes, but the role of pathogens has been largely overlooked, especially with respect to viruses. We used a metagenomic approach to identify and quantify viruses in the blood of 103 A. vulpes sampled throughout their Western Atlantic range, including populations in Florida that have experienced population declines and populations in Belize, Mexico, Puerto Rico, and The Bahamas that have remained apparently stable. We identified four viruses, all of which are members of families known to infect marine fishes (Flaviviridae, Iflaviridae, Narnaviridae, and Nodaviridae), but all of which were previously undescribed. Bonefish from Florida and Mexico had higher viral richness (numbers of distinct viruses per individual fish) than fish sampled from other areas, and bonefish from the Upper Florida Keys had the highest prevalence of viral infection (proportion of positive fish) than fish sampled from any other location. Bonefish from Florida also had markedly higher viral loads than fish sampled from any other area, both for a novel narnavirus and for all viruses combined. Bonefish viruses may be indicators of environmentally driven physiological and immunological compromise, causes of ill health, or both. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s10641-022-01306-9.
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Affiliation(s)
- Lewis J. Campbell
- Department of Pathobiological Sciences, University of Wisconsin-Madison, Madison, WI USA
| | - Nicholas A. Castillo
- Department of Earth and Environment, Florida International University, Miami, FL USA
| | - Christopher D. Dunn
- Department of Pathobiological Sciences, University of Wisconsin-Madison, Madison, WI USA
| | | | - Juan J. Schmitter-Soto
- Departamento de Sistemática y Ecología Acuática, El Colegio de la Frontera Sur, Q.R, Campeche, Mexico
| | - Sahar C. Mejri
- Department of Aquaculture and Stock Enhancement, Florida Atlantic University, Fort Pierce, FL USA
| | | | | | - Aaron J. Adams
- Bonefish & Tarpon Trust, Miami, FL USA
- Harbor Branch Oceanographic Institute, Florida Atlantic University, Fort Pierce, FL USA
| | - Jennifer S. Rehage
- Department of Earth and Environment, Florida International University, Miami, FL USA
| | - Tony L. Goldberg
- Department of Pathobiological Sciences, University of Wisconsin-Madison, Madison, WI USA
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Meyers TR, Hickey N. A Perspective: Molecular Detections of New Agents in Finfish-Interpreting Biological Significance for Fish Health Management. JOURNAL OF AQUATIC ANIMAL HEALTH 2022; 34:47-57. [PMID: 35384072 DOI: 10.1002/aah.10155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 12/31/2021] [Accepted: 03/31/2022] [Indexed: 06/14/2023]
Abstract
The increased sensitivity of advanced molecular techniques greatly exceeds the sensitivities of traditional detection methods for infectious agents. This sensitivity causes difficulty in interpreting the biological significance of such detections in fish (and shellfish), especially when the agent(s) cannot be cultured in the laboratory. In the Pacific Northwest, including Canada and Alaska, molecular detections of "new" (unknown or known but discovered in a different geographic location or fish host) potentially infectious agents in fish have received extensive media attention and misinterpretation that call for resource agencies to change current fish health surveillance practices or policies to include these agents. Fish health specialists from several of these agencies and organizations (see Acknowledgments) advise that any policy changes should be made only after further investigations to avoid wasting resources to conduct surveillance for organisms that are not significant to fish health or for noninfectious genetic material that does not represent a viable agent. Molecular detection is not proof of agent viability within or on host tissues and requires further investigation regarding the agent's ability to replicate and evidence that the agent causes substantial risk of disease to exposed fish populations. This document provides examples of molecularly detected agents causing public concern that were accompanied by little or no data to provide context and assessment of biological significance, highlights important questions to be answered regarding these detections, and provides a suggested pathway of investigative criteria to determine viability and pathogenicity of such agents that are necessary for consideration of any changes to aquatic animal health practices and policies.
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Affiliation(s)
- Theodore R Meyers
- Alaska Department of Fish and Game, Commercial Fisheries Division, Post Office Box 115526, Juneau, Alaska, 99811, USA
| | - Nora Hickey
- Northwest Indian Fisheries Commission, 6730 Martin Way East, Olympia, Washington, 98516, USA
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Luo L, Xu Y, Chang Y, Sun B, Zhang L, Zhao Z, Liang L. Microbiota Comparison of Amur ide ( Leuciscus waleckii) Intestine and Waters at Alkaline Water and Freshwater as the Living Environment. Front Microbiol 2022; 13:881132. [PMID: 35602074 PMCID: PMC9114670 DOI: 10.3389/fmicb.2022.881132] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 04/06/2022] [Indexed: 11/13/2022] Open
Abstract
The intestinal microbiota of marine animals was influenced by the water and environment in which they live. The Amur ide (Leuciscus waleckii) adapts to extremely high alkalinity and is an ideal material for aquacultural studies of alkaline adaptation. In this study, we screened intestinal indicator flora and functional redundancy of intestinal colonies in alkaline-water species (AW) and freshwater species (FW) of Amur ide (L. waleckii) in these different aquatic environments. The available vs. community composition correlations were then predicted by contrasting each other with the flora contained in environmental water samples. Here, five microbial species and six genera were identified owing to the classifiable sequence. The intestinal microbiota that existed in AW and FW had approximately 1/3 of the operational taxonomic units in the respective living water environments, meaning gut microbes in the aqueous habitats will have an influential association with gut microbes in AW and FW. Compared to the bacterial composition of the FW intestine and that present in freshwater, Moraxella osloensis, Psychrobacter maritimus, and Psychrobacter faecalis were significantly enriched in the intestine of AW and alkaline water samples. In the FW intestine and freshwater samples, however, Cryptomonas curvata and Polynucleobacter asymbioticus were highly improved, which can be summarized as Enterobacter sp., the predominant population in the AW gut, while Aeromonas and Ralstonia being primarily present in FW intestines. Photosynthetic bacteria were most significant in both water samples. The results indicated that the intestinal microbiota composition, abundance, and diversity of AW and FW were quite different. In contrast, the microbial composition of the additional alkaline water and freshwater environments showed slight differences. This study expects to enhance our understanding of the alkalinity tolerance of L. waleckii, which will be provided for the breeding of fish living in alkaline water, and push the development of alkaline water resources with increased efficiency.
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Affiliation(s)
- Liang Luo
- Key Laboratory of Cold Water Fish Germplasm Resources and Multiplication and Cultivation of Heilongjiang Province, Heilongjiang River Fisheries Research Institute of Chinese Academy of Fishery Sciences, Harbin, China
| | - Yue Xu
- The Centre of Marine Sciences, University of Algarve, Faro, Portugal
| | - Yumei Chang
- Key Laboratory of Cold Water Fish Germplasm Resources and Multiplication and Cultivation of Heilongjiang Province, Heilongjiang River Fisheries Research Institute of Chinese Academy of Fishery Sciences, Harbin, China
| | - Bo Sun
- Key Laboratory of Cold Water Fish Germplasm Resources and Multiplication and Cultivation of Heilongjiang Province, Heilongjiang River Fisheries Research Institute of Chinese Academy of Fishery Sciences, Harbin, China
| | - Limin Zhang
- Key Laboratory of Cold Water Fish Germplasm Resources and Multiplication and Cultivation of Heilongjiang Province, Heilongjiang River Fisheries Research Institute of Chinese Academy of Fishery Sciences, Harbin, China
| | - Zhigang Zhao
- Key Laboratory of Cold Water Fish Germplasm Resources and Multiplication and Cultivation of Heilongjiang Province, Heilongjiang River Fisheries Research Institute of Chinese Academy of Fishery Sciences, Harbin, China
| | - Liqun Liang
- Key Laboratory of Cold Water Fish Germplasm Resources and Multiplication and Cultivation of Heilongjiang Province, Heilongjiang River Fisheries Research Institute of Chinese Academy of Fishery Sciences, Harbin, China
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Xiao J, Zhong H, Yan J, Li Z, Liu S, Feng H. Identification and comparative study of melanoma differentiation-associated gene 5 homologues of triploid hybrid fish and its parents. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2022; 127:104294. [PMID: 34655618 DOI: 10.1016/j.dci.2021.104294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 09/16/2021] [Accepted: 09/16/2021] [Indexed: 06/13/2023]
Abstract
Sterile triploid fish (3n = 150), derived from the hybridization between red crucian carp (Carassius auratus red var., ♀, 2n = 100) and allotetraploid (♂, 4n = 200), exhibits the improved disease resistance compared with its parents, but the current knowledge of the immunity of triploid fish is limited. Here, we report the identification and characterization of melanoma differentiation-associated gene 5 (MDA5) homologues from red crucian carp, triploid fish and allotetraploid. In this study, one red crucian carp MDA5 transcript (2nMDA5), two triploid fish MDA5 transcripts (3nMDA5-a and 3nMDA5-b) and two allotetraploid fish MDA5 transcripts (4nMDA5-a and 4nMDA5-b) have been cloned and identified separately. Immunofluorescence staining assay displayed that these MDA5 proteins were cytoplasmic proteins. RT-qPCR assay showed that, in response to spring viremia of carp virus (SVCV) and poly (I:C) stimuli, the increase of 3nMDA5 mRNA level was obviously higher than those of 2nMDA5 and 4nMDA5. Interestingly, the reporter assay and plaque assay revealed collectively that 3nMDA5-b, a shorter splicing form of MDA5, exhibited the strongest IFN promoter-inducing ability and antiviral activity. Additionally, when co-expressed with 3nMAVS, 3nMDA5-b induced a considerably higher level of IFN promoter activation than 3nMDA5-a; and the interactions between 3nMAVS/3nMDA5-a and 3nMAVS/3nMDA5-b were verified by co-IP assay. Taken together, our findings support the conclusion that in triploid fish, 3nMDA5-b mediates a robust antiviral signaling in host innate immune response.
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Affiliation(s)
- Jun Xiao
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China
| | - Huijuan Zhong
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China
| | - Jun Yan
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China
| | - Zhenghao Li
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China
| | - Shaojun Liu
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China
| | - Hao Feng
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China.
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12
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Bass AL, Bateman AW, Connors BM, Staton BA, Rondeau EB, Mordecai GJ, Teffer AK, Kaukinen KH, Li S, Tabata AM, Patterson DA, Hinch SG, Miller KM. Identification of infectious agents in early marine Chinook and Coho salmon associated with cohort survival. Facets (Ott) 2022. [DOI: 10.1139/facets-2021-0102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Recent decades have seen an increased appreciation for the role infectious diseases can play in mass mortality events across a diversity of marine taxa. At the same time many Pacific salmon populations have declined in abundance as a result of reduced marine survival. However, few studies have explicitly considered the potential role pathogens could play in these declines. Using a multi-year dataset spanning 59 pathogen taxa in Chinook and Coho salmon sampled along the British Columbia coast, we carried out an exploratory analysis to quantify evidence for associations between pathogen prevalence and cohort survival and between pathogen load and body condition. While a variety of pathogens had moderate to strong negative correlations with body condition or survival for one host species in one season, we found that Tenacibaculum maritimum and Piscine orthoreovirus had consistently negative associations with body condition in both host species and seasons and were negatively associated with survival for Chinook salmon collected in the fall and winter. Our analyses, which offer the most comprehensive examination of associations between pathogen prevalence and Pacific salmon survival to date, suggest that pathogens in Pacific salmon warrant further attention, especially those whose distribution and abundance may be influenced by anthropogenic stressors.
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Affiliation(s)
- Arthur L. Bass
- Pacific Salmon Ecology and Conservation Laboratory, Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Andrew W. Bateman
- Pacific Salmon Foundation, Vancouver, BC V6J 4S6, Canada
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON M5S 3B2, Canada
| | - Brendan M. Connors
- Institute of Ocean Sciences, Fisheries and Oceans Canada, Sidney, BC V8L 5T5, Canada
| | - Benjamin A. Staton
- Fisheries Science Department, Columbia River Inter-Tribal Fish Commission, Portland, OR 97232, USA
| | - Eric B. Rondeau
- Pacific Biological Station, Fisheries and Oceans Canada, Nanaimo, BC, Canada
| | - Gideon J. Mordecai
- Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC V9T 6N7, Canada
| | - Amy K. Teffer
- Pacific Salmon Ecology and Conservation Laboratory, Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Karia H. Kaukinen
- Pacific Biological Station, Fisheries and Oceans Canada, Nanaimo, BC, Canada
| | - Shaorong Li
- Pacific Biological Station, Fisheries and Oceans Canada, Nanaimo, BC, Canada
| | - Amy M. Tabata
- Pacific Biological Station, Fisheries and Oceans Canada, Nanaimo, BC, Canada
| | - David A. Patterson
- Fisheries and Oceans Canada, School of Resource and Environmental Management, Simon Fraser University, Science Branch, Burnaby, BC V5A 1S6, Canada
| | - Scott G. Hinch
- Pacific Salmon Ecology and Conservation Laboratory, Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Kristina M. Miller
- Pacific Salmon Ecology and Conservation Laboratory, Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
- Pacific Biological Station, Fisheries and Oceans Canada, Nanaimo, BC, Canada
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