The acute temperature tolerance of green sturgeon (Acipenser medirostris) and the effect of environmental salinity.
Identifieur interne : 000431 ( PubMed/Checkpoint ); précédent : 000430; suivant : 000432The acute temperature tolerance of green sturgeon (Acipenser medirostris) and the effect of environmental salinity.
Auteurs : Brian A. Sardella [États-Unis] ; Enio Sanmarti ; Dietmar KültzSource :
- Journal of experimental zoology. Part A, Ecological genetics and physiology [ 1932-5223 ] ; 2008.
English descriptors
- KwdEn :
- MESH :
- blood : Fishes.
- physiology : Adaptation, Physiological, Brain, Fishes, Heart, Muscles.
- Animals, Ecosystem, Fresh Water, Hematocrit, Osmolar Concentration, Respiration, Salinity, Seawater, Temperature.
Abstract
We investigated the effect of environmental salinity on the upper thermal tolerance of green sturgeon (Acipenser medirostris), a threatened species whose natural habitat is vulnerable to temperature and salinity variation as a result of global climate change. Freshwater (FW)-reared sturgeon were gradually acclimated to salinities representing FW, estuary water (EST), or San Francisco Bay water (BAY) at 18 degrees C, and their critical thermal maximum (CTMax) was measured by increasing temperature 0.3 degrees C/min until branchial ventilation ceased. CTMax was 34.2+/-0.09 degrees C in EST-acclimated fish, with FW- and BAY-acclimated fish CTMax at 33.7+/-0.08 and 33.7+/-0.1 degrees C, respectively. Despite the higher CTMax in EST-acclimated fish, FW-acclimated sturgeon ventilation rate reached a peak that was 2 degrees C higher than EST- and BAY-acclimated groups and had a greater range of temperatures within which they exhibited normal ventilatory function as assessed by Q10 calculation. The osmoregulatory consequences of exposure to near-lethal temperatures were assessed by measuring plasma osmolality and hematocrit, as well as white muscle, brain, and heart tissue water contents. Hematocrit was increased following CTMax exposure, most likely owing to the elevated metabolic demands of temperature increase, and plasma osmolality was significantly increased in EST- and BAY-acclimated fish, which was likely the result of a greater osmotic gradient across the gill as metabolism increased. To our knowledge, this represents the first evidence for an effect of salinity on the upper thermal tolerance of sturgeon, as well as the first investigation of the osmoregulatory consequences of exposure to near-lethal temperatures.
DOI: 10.1002/jez.477
PubMed: 18615462
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Sardella</name><affiliation wicri:level="1"><nlm:affiliation>Department of Animal Science, University of California, Davis, California 95616, USA. basardella@ucdavis.edu</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Animal Science, University of California, Davis, California 95616</wicri:regionArea><wicri:noRegion>California 95616</wicri:noRegion></affiliation></author><author><name sortKey="Sanmarti, Enio" sort="Sanmarti, Enio" uniqKey="Sanmarti E" first="Enio" last="Sanmarti">Enio Sanmarti</name></author><author><name sortKey="Kultz, Dietmar" sort="Kultz, Dietmar" uniqKey="Kultz D" first="Dietmar" last="Kültz">Dietmar Kültz</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2008">2008</date><idno type="RBID">pubmed:18615462</idno><idno type="pmid">18615462</idno><idno type="doi">10.1002/jez.477</idno><idno type="wicri:Area/PubMed/Corpus">000454</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000454</idno><idno type="wicri:Area/PubMed/Curation">000454</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Curation">000454</idno><idno type="wicri:Area/PubMed/Checkpoint">000454</idno><idno type="wicri:explorRef" wicri:stream="Checkpoint" wicri:step="PubMed">000454</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">The acute temperature tolerance of green sturgeon (Acipenser medirostris) and the effect of environmental salinity.</title><author><name sortKey="Sardella, Brian A" sort="Sardella, Brian A" uniqKey="Sardella B" first="Brian A" last="Sardella">Brian A. Sardella</name><affiliation wicri:level="1"><nlm:affiliation>Department of Animal Science, University of California, Davis, California 95616, USA. basardella@ucdavis.edu</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Animal Science, University of California, Davis, California 95616</wicri:regionArea><wicri:noRegion>California 95616</wicri:noRegion></affiliation></author><author><name sortKey="Sanmarti, Enio" sort="Sanmarti, Enio" uniqKey="Sanmarti E" first="Enio" last="Sanmarti">Enio Sanmarti</name></author><author><name sortKey="Kultz, Dietmar" sort="Kultz, Dietmar" uniqKey="Kultz D" first="Dietmar" last="Kültz">Dietmar Kültz</name></author></analytic><series><title level="j">Journal of experimental zoology. Part A, Ecological genetics and physiology</title><idno type="ISSN">1932-5223</idno><imprint><date when="2008" type="published">2008</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adaptation, Physiological (physiology)</term><term>Animals</term><term>Brain (physiology)</term><term>Ecosystem</term><term>Fishes (blood)</term><term>Fishes (physiology)</term><term>Fresh Water</term><term>Heart (physiology)</term><term>Hematocrit</term><term>Muscles (physiology)</term><term>Osmolar Concentration</term><term>Respiration</term><term>Salinity</term><term>Seawater</term><term>Temperature</term></keywords><keywords scheme="MESH" qualifier="blood" xml:lang="en"><term>Fishes</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Adaptation, Physiological</term><term>Brain</term><term>Fishes</term><term>Heart</term><term>Muscles</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Ecosystem</term><term>Fresh Water</term><term>Hematocrit</term><term>Osmolar Concentration</term><term>Respiration</term><term>Salinity</term><term>Seawater</term><term>Temperature</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We investigated the effect of environmental salinity on the upper thermal tolerance of green sturgeon (Acipenser medirostris), a threatened species whose natural habitat is vulnerable to temperature and salinity variation as a result of global climate change. Freshwater (FW)-reared sturgeon were gradually acclimated to salinities representing FW, estuary water (EST), or San Francisco Bay water (BAY) at 18 degrees C, and their critical thermal maximum (CTMax) was measured by increasing temperature 0.3 degrees C/min until branchial ventilation ceased. CTMax was 34.2+/-0.09 degrees C in EST-acclimated fish, with FW- and BAY-acclimated fish CTMax at 33.7+/-0.08 and 33.7+/-0.1 degrees C, respectively. Despite the higher CTMax in EST-acclimated fish, FW-acclimated sturgeon ventilation rate reached a peak that was 2 degrees C higher than EST- and BAY-acclimated groups and had a greater range of temperatures within which they exhibited normal ventilatory function as assessed by Q10 calculation. The osmoregulatory consequences of exposure to near-lethal temperatures were assessed by measuring plasma osmolality and hematocrit, as well as white muscle, brain, and heart tissue water contents. Hematocrit was increased following CTMax exposure, most likely owing to the elevated metabolic demands of temperature increase, and plasma osmolality was significantly increased in EST- and BAY-acclimated fish, which was likely the result of a greater osmotic gradient across the gill as metabolism increased. To our knowledge, this represents the first evidence for an effect of salinity on the upper thermal tolerance of sturgeon, as well as the first investigation of the osmoregulatory consequences of exposure to near-lethal temperatures.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">18615462</PMID><DateCreated><Year>2008</Year><Month>09</Month><Day>08</Day></DateCreated><DateCompleted><Year>2008</Year><Month>11</Month><Day>04</Day></DateCompleted><DateRevised><Year>2009</Year><Month>10</Month><Day>05</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">1932-5223</ISSN><JournalIssue CitedMedium="Print"><Volume>309</Volume><Issue>8</Issue><PubDate><Year>2008</Year><Month>Oct</Month><Day>01</Day></PubDate></JournalIssue><Title>Journal of experimental zoology. Part A, Ecological genetics and physiology</Title><ISOAbbreviation>J Exp Zool A Ecol Genet Physiol</ISOAbbreviation></Journal><ArticleTitle>The acute temperature tolerance of green sturgeon (Acipenser medirostris) and the effect of environmental salinity.</ArticleTitle><Pagination><MedlinePgn>477-83</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1002/jez.477</ELocationID><Abstract><AbstractText>We investigated the effect of environmental salinity on the upper thermal tolerance of green sturgeon (Acipenser medirostris), a threatened species whose natural habitat is vulnerable to temperature and salinity variation as a result of global climate change. Freshwater (FW)-reared sturgeon were gradually acclimated to salinities representing FW, estuary water (EST), or San Francisco Bay water (BAY) at 18 degrees C, and their critical thermal maximum (CTMax) was measured by increasing temperature 0.3 degrees C/min until branchial ventilation ceased. CTMax was 34.2+/-0.09 degrees C in EST-acclimated fish, with FW- and BAY-acclimated fish CTMax at 33.7+/-0.08 and 33.7+/-0.1 degrees C, respectively. Despite the higher CTMax in EST-acclimated fish, FW-acclimated sturgeon ventilation rate reached a peak that was 2 degrees C higher than EST- and BAY-acclimated groups and had a greater range of temperatures within which they exhibited normal ventilatory function as assessed by Q10 calculation. The osmoregulatory consequences of exposure to near-lethal temperatures were assessed by measuring plasma osmolality and hematocrit, as well as white muscle, brain, and heart tissue water contents. Hematocrit was increased following CTMax exposure, most likely owing to the elevated metabolic demands of temperature increase, and plasma osmolality was significantly increased in EST- and BAY-acclimated fish, which was likely the result of a greater osmotic gradient across the gill as metabolism increased. To our knowledge, this represents the first evidence for an effect of salinity on the upper thermal tolerance of sturgeon, as well as the first investigation of the osmoregulatory consequences of exposure to near-lethal temperatures.</AbstractText><CopyrightInformation>Copyright 2008 Wiley-Liss, Inc.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Sardella</LastName><ForeName>Brian A</ForeName><Initials>BA</Initials><AffiliationInfo><Affiliation>Department of Animal Science, University of California, Davis, California 95616, USA. basardella@ucdavis.edu</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Sanmarti</LastName><ForeName>Enio</ForeName><Initials>E</Initials></Author><Author ValidYN="Y"><LastName>Kültz</LastName><ForeName>Dietmar</ForeName><Initials>D</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>J Exp Zool A Ecol Genet Physiol</MedlineTA><NlmUniqueID>101297745</NlmUniqueID><ISSNLinking>1932-5223</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D000222" MajorTopicYN="N">Adaptation, Physiological</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D000818" MajorTopicYN="N">Animals</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D001921" MajorTopicYN="N">Brain</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D017753" MajorTopicYN="Y">Ecosystem</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D005399" MajorTopicYN="N">Fishes</DescriptorName><QualifierName UI="Q000097" MajorTopicYN="N">blood</QualifierName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D005618" MajorTopicYN="N">Fresh Water</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D006321" MajorTopicYN="N">Heart</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D006400" MajorTopicYN="N">Hematocrit</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D009132" MajorTopicYN="N">Muscles</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D009994" MajorTopicYN="N">Osmolar Concentration</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D012119" MajorTopicYN="N">Respiration</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D054712" MajorTopicYN="N">Salinity</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D012623" MajorTopicYN="N">Seawater</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D013696" MajorTopicYN="N">Temperature</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>2008</Year><Month>7</Month><Day>11</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2008</Year><Month>11</Month><Day>5</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2008</Year><Month>7</Month><Day>11</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">18615462</ArticleId><ArticleId IdType="doi">10.1002/jez.477</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country></list><tree><noCountry><name sortKey="Kultz, Dietmar" sort="Kultz, Dietmar" uniqKey="Kultz D" first="Dietmar" last="Kültz">Dietmar Kültz</name><name sortKey="Sanmarti, Enio" sort="Sanmarti, Enio" uniqKey="Sanmarti E" first="Enio" last="Sanmarti">Enio Sanmarti</name></noCountry><country name="États-Unis"><noRegion><name sortKey="Sardella, Brian A" sort="Sardella, Brian A" uniqKey="Sardella B" first="Brian A" last="Sardella">Brian A. 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