Evolutionary transition to freshwater by ancestral marine palaemonids: evidence from osmoregulation in a tide pool shrimp

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dc.contributor.authorAugusto, Alessandra da Silva [UNESP]
dc.contributor.authorPinheiro, Adriana Silva
dc.contributor.authorGreene, Lewis Joel
dc.contributor.authorLaure, Helen Julie
dc.contributor.authorMcNamara, John Campbell
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:12:36Z
dc.date.available2014-05-20T13:12:36Z
dc.date.issued2009-01-01
dc.description.abstractThe transition from marine/brackish waters to freshwater habitats constitutes a severe osmotic and ionic challenge, and successful invasion has demanded the selection of morphological, physiological, biochemical and behavioral adaptations. We evaluated short-term (1 to 12 h exposure) and long-term (5 d acclimation), anisosmotic extracellular (osmolality, [Na(+), Cl(-)]) and long-term isosmotic intracellular osmoregulatory capability in Palaemon northropi, a neotropical intertidal shrimp. F northropi survives well and osmo- and ionoregulates strongly during short- and long-term exposure to 5-45 parts per thousand salinity, consistent with its rocky tide pool habitat subject to cyclic salinity fluctuations, Muscle total free amino acid (FAA) concentrations decreased by 63% in shrimp acclimated to 5%. salinity, revealing a role in hypoosmotic cell volume regulation; this decrease is mainly a consequence of diminished glycine, arginine and proline. Total FAA contributed 31% to muscle intracellular osmolality at 20 parts per thousand, an isosmotic salinity, and decreased to 13% after acclimation to 5 parts per thousand. Gill and nerve tissue FAA concentrations remained unaltered. These tissue-specific responses reflect efficient anisosmotic and anisoionic extracellular regulatory mechanisms, and reveal the dependence of muscle tissue on intracellular osmotic effectors. FAA concentration is higher in P. northropi than in diadromous and hololimnetic palaemonids, confirming muscle FAA concentration as a good parameter to evaluate the degree of adaptation to dilute media. The osmoregulatory capability of P. northropi may reflect the potential physiological capacity of ancestral marine palaemonids to penetrate into dilute media, and reveals the importance of evaluating osmoregulatory processes in endeavors to comprehend the invasion of dilute media by ancestral marine crustaceans.en
dc.description.affiliationUniv São Paulo, Dept Biol, Fac Filosofia Ciencias & Letras Ribeirao Pret, BR-14040901 Ribeirao Preto, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Ctr Aquicultura, BR-14870810 Jaboticabal, SP, Brazil
dc.description.affiliationUniv São Paulo, Fac Med, Ctr Quim Proteinas, BR-14051040 Ribeirao Preto, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Ctr Aquicultura, BR-14870810 Jaboticabal, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipPrograma de Apoio aos Núcleos de Excelência (PRONEX)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFAPESP: 96/01842-8
dc.description.sponsorshipIdFAPESP: 01/00576-2
dc.description.sponsorshipIdFAPESP: 01/01763-5
dc.description.sponsorshipIdPronex: 66/1132/98-6
dc.description.sponsorshipIdCNPq: 303282-84
dc.format.extent113-122
dc.identifierhttp://dx.doi.org/10.3354/ab00183
dc.identifier.citationAquatic Biology. Oldendorf Luhe: Inter-research, v. 7, n. 1-2, p. 113-122, 2009.
dc.identifier.doi10.3354/ab00183
dc.identifier.issn1864-7790
dc.identifier.urihttp://hdl.handle.net/11449/536
dc.identifier.wosWOS:000272490500010
dc.language.isoeng
dc.publisherInter-research
dc.relation.ispartofAquatic Biology
dc.relation.ispartofjcr1.932
dc.relation.ispartofsjr0,949
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectFreshwater invasionen
dc.subjectMarine-freshwater transitionen
dc.subjectPhysiological adaptationen
dc.subjectOsmotic and ionic regulationen
dc.subjectFree amino acidsen
dc.subjectPalaemonid shrimpen
dc.subjectPalaemon northropien
dc.titleEvolutionary transition to freshwater by ancestral marine palaemonids: evidence from osmoregulation in a tide pool shrimpen
dc.typeResumo
dcterms.licensehttp://www.int-res.com/journals/ab/about-the-Journal/#openaccess
dcterms.rightsHolderInter-research
unesp.author.lattes3167813441577674[1]
unesp.author.orcid0000-0003-0144-9726[3]
unesp.author.orcid0000-0002-6530-8706[5]
unesp.author.orcid0000-0001-7002-9042[1]

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Jaboticabal - CAUNESP - Centro de Aquicultura da Unesp