INVESTIGADORES
MALANGA Gabriela Fabiana
artículos
Título:
Metals fromminewasteaspotentialcauseofoxidativestress in burrowingcrab Neohelicegranulata fromSanAntoniobay
Autor/es:
GIARRATANO E; GIL MN; MARINHO CH; MALANGA G
Revista:
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Editorial:
ACADEMIC PRESS INC ELSEVIER SCIENCE
Referencias:
Lugar: Amsterdam; Año: 2016 vol. 132 p. 68 - 76
ISSN:
0147-6513
Resumen:
The NaturalProtectedAreaSanAntoniobayisofparticularimportanceforitscongregationofmigratoryshorebirdsandithasbeendeclaredoneoftheWesternHemisphereShorebirdReserveNetworkInter-national site(WHSRN).Presentstudyrepresentsthe first assessmentofvariationonoxidativestressbiomarkers inmalecrab Neohelice granulata from SanAntoniobay(RíoNegro,Argentina)under fieldconditions, associatedmainlytometalcontaminationcomingfrompassiveminingwastes.ThreesitesweresampledonceeverythreemonthsfromNovember2012toAugust2013withinthisseainlet(Pile,Fishery andPort)andacontrolsiteatthesoutheastofthebay(PuntaPerdices).AccumulationofNi,Zn,Cr andAlvariedonlywithseasonsalthoughwithoutaconstanttrend,meanwhileCd,CuandPbalsovariedamongsitesbeinghighestinPileandPort.Biochemicalresultsindicatedthatvariationsincatalaseactivity wasonlysitespecific beingmaximuminPile;meanwhilelipidradical, α-tocopherol andme-tallothioneins wereonlyseasonalspecific beinghigherinautumnandwinter.Seasonalvariationwasalsofound fortotalthioles,beingthecontenthigherinsummerandautumnthaninwinter.Correlationanalysisrevealedthatmalondialdehydeand α-tocopherolhaveapositiveassociationwithAlandne-gativewithNi,meanwhileGSThasapositiveassociationwithFe.Crabsfromtheclosestareatothewastepile didnotexhibitadifferentiatedoxidativepressuredespitethehigheraccumulationofmetals.Itispossible thatcrabsfromcontaminatedareashavedevelopedatolerancetometals,indicatingastrongecotoxicologicalselectivepressure.Morestudiesareneededtoassesswhetherthereisatransferofmetals throughthefoodchain.
