USAP-DC

[]

{"@context": "https://schema.org/", "@type": "Dataset", "@id": "doi:10.15784/601410", "additionalType": ["geolink:Dataset", "vivo:Dataset"], "name": "Effects of acute warming on cardiovascular performance of Antarctic fishes", "description": "We tested the hypothesis that blackfin icefish (Chaenocephalus aceratus), one of the six species in the family Channichthyidae (the icefishes) that do not express haemoglobin and myoglobin, lack regulatory cardiovascular flexibility during acute warming and activity. The experimental protocols were designed to optimize the surgical protocol and minimize stress. First, minimally invasive heart rate (fH) measurements were made during a thermal ramp until cardiac failure in C. aceratus and compared with those from the closely related red-blooded black rockcod (Notothenia coriiceps). Then, integrative cardiovascular adjustments were more extensively studied using flow probes and intravascular catheters in C. aceratus during acute warming (from 0 to 8\u00b0C) at rest and after imposed activity. Chaenocephalus aceratus had a lower routine fH than N. coriiceps (9 beats min-1 versus 14 beats min-1) and a lower peak fH during acute warming (38 beats min-1 versus 55 beats min-1) with a similar cardiac breakpoint temperature (13 and 14\u00b0C, respectively). Routine cardiac output (Q\u0307) for C. aceratus at \u223c0\u00b0C was much lower (26.6 ml min-1 kg-1) than previously reported, probably because fish in the present study had a low fH (12 beats min-1) indicative of a high routine vagal tone and low stress. Chaenocephalus aceratus increased oxygen consumption during acute warming and with activity. Correspondingly, Q\u0307 increased considerably (maximally 86.3 ml min-1 kg-1), as did vascular conductance (5-fold). Thus, unlike earlier suggestions, these data provide convincing evidence that icefish can mount a well-developed cardiovascular regulation of heart rate, cardiac output and vascular conductance, and this regulatory capacity provides flexibility during acute warming. ", "citation": "O'Brien, K., Axelsson, M., Crockett, E., Egginton, S., Farrell, A., & Joyce, W. (2020) \"Effects of acute warming on cardiovascular performance of Antarctic fishes\" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601410.", "datePublished": "2020-12-18", "keywords": ["Antarctica", "Antarctic Peninsula", "Biota", "Fish"], "creator": [{"@type": "Person", "additionalType": "geolink:Person", "name": "O'Brien, Kristin", "email": "kmobrien@alaska.edu", "affiliation": {"@type": "Organization", "name": "University of Alaska"}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Crockett, Elizabeth", "email": "crockett@ohio.edu", "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Farrell, Anthony", "email": null, "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Egginton, Stuart", "email": null, "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Axelsson, Michael", "email": null, "affiliation": {"@type": "Organization", "name": null}}, {"@type": "Person", "additionalType": "geolink:Person", "name": "Joyce, William", "email": null, "affiliation": {"@type": "Organization", "name": null}}], "distribution": [{"@type": "DataDownload", "additionalType": "http://www.w3.org/ns/dcat#DataCatalog", "encodingFormat": "text/xml", "name": "ISO Metadata Document", "url": "https://www.usap-dc.org/metadata/isoxml/601410iso.xml", "contentUrl": "/dataset/filename"}, {"@type": "DataDownload", "@id": "http://dx.doi.org/10.15784/601410", "additionalType": "dcat:distribution", "url": "http://dx.doi.org/10.15784/601410", "name": "landing page", "description": "Link to a web page related to the resource.. Service Protocol: Link to a web page related to the resource.. Link Function: information", "contentUrl": "/dataset/filename", "encodingFormat": "text/html"}, {"@type": "DataDownload", "@id": "https://www.usap-dc.org/view/dataset/601410", "additionalType": "dcat:distribution", "url": "https://www.usap-dc.org/view/dataset/601410", "name": "landing page", "description": "Link to a web page related to the resource.. Service Protocol: Link to a web page related to the resource.. Link Function: information", "contentUrl": "/dataset/filename", "encodingFormat": "text/html"}], "identifier": {"@type": "PropertyValue", "propertyID": "https://registry.identifiers.org/registry/doi", "value": "doi:10.15784/601410", "url": "https://doi.org/10.15784/601410"}, "contributor": [{"@type": "Role", "roleName": "credit", "description": "funderName:NSF:GEO:PLR:Antarctic Organisms and Ecosystems awardNumber:1341602 awardTitle:Collaborative Research: The Physiological and Biochemical Underpinnings of Thermal Tolerance in Antarctic Notothenioid Fishes"}, {"@type": "Role", "roleName": "credit", "description": "funderName:NSF:GEO:PLR:Antarctic Organisms and Ecosystems awardNumber:1341663 awardTitle:Collaborative Research: The Physiological and Biochemical Underpinnings of Thermal Tolerance in Antarctic Notothenioid Fishes"}], "license": [{"@type": "CreativeWork", "URL": "https://creativecommons.org/licenses/by/4.0/", "name": "MD_Constraints", "description": "useLimitation: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0]."}, {"@type": "CreativeWork", "name": "MD_LegalConstraints", "description": "accessConstraints: license. otherConstraints: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0]."}, {"@type": "CreativeWork", "name": "MD_SecurityConstraints", "description": "classification: "}], "publisher": {"@type": "Organization", "name": "U.S. Antarctic Program (USAP) Data Center"}, "spatialCoverage": []}

Effects of acute warming on cardiovascular performance of Antarctic fishes Data DOI: https://doi.org/10.15784/601410 Cite as O'Brien, K., Axelsson, M., Crockett, E., Egginton, S., Farrell, A., & Joyce, W. (2020) "Effects of acute warming on cardiovascular performance of Antarctic fishes" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601410. AMD - DIF Record(s) USAP-1341602_1 Abstract We tested the hypothesis that blackfin icefish (Chaenocephalus aceratus), one of the six species in the family Channichthyidae (the icefishes) that do not express haemoglobin and myoglobin, lack regulatory cardiovascular flexibility during acute warming and activity. The experimental protocols were designed to optimize the surgical protocol and minimize stress. First, minimally invasive heart rate (fH) measurements were made during a thermal ramp until cardiac failure in C. aceratus and compared with those from the closely related red-blooded black rockcod (Notothenia coriiceps). Then, integrative cardiovascular adjustments were more extensively studied using flow probes and intravascular catheters in C. aceratus during acute warming (from 0 to 8°C) at rest and after imposed activity. Chaenocephalus aceratus had a lower routine fH than N. coriiceps (9 beats min-1 versus 14 beats min-1) and a lower peak fH during acute warming (38 beats min-1 versus 55 beats min-1) with a similar cardiac breakpoint temperature (13 and 14°C, respectively). Routine cardiac output (Q̇) for C. aceratus at ∼0°C was much lower (26.6 ml min-1 kg-1) than previously reported, probably because fish in the present study had a low fH (12 beats min-1) indicative of a high routine vagal tone and low stress. Chaenocephalus aceratus increased oxygen consumption during acute warming and with activity. Correspondingly, Q̇ increased considerably (maximally 86.3 ml min-1 kg-1), as did vascular conductance (5-fold). Thus, unlike earlier suggestions, these data provide convincing evidence that icefish can mount a well-developed cardiovascular regulation of heart rate, cardiac output and vascular conductance, and this regulatory capacity provides flexibility during acute warming. Creator(s): O'Brien, Kristin; Joyce, William; Farrell, Anthony; Axelsson, Michael; Egginton, Stuart; Crockett, Elizabeth Date Created: 2020-12-18 Repository: USAP-DC (current) License: Creative Commons Attribution Only v4.0 Generic [CC BY 4.0] Temporal Extent(s) Start: 2014-09-01 - End: 2019-08-31 Award(s) NSF 1341602 NSF 1341663 Version: 1 Related Project(s) Collaborative Research: The Physiological and Biochemical Underpinnings of Thermal Tolerance in Antarctic Notothenioid Fishes References William Joyce , Stuart Egginton, Anthony P Farrell, Elizabeth L Crockett, Kristin M O'Brien, Michael Axelsson. (2018) Exploring nature's natural knockouts: in vivo cardiorespiratory performance of Antarctic fishes during acute warming. J Exp Biol: 221(Pt 15) (doi:0.1242/jeb.183160 ) Keywords Antarctic Peninsula Antarctica Biota Fish