PERSONAL DE APOYO
LOTESTE Alicia Elena
artículos
Título:
Cost ofreproduction.Changesinmetabolismandendosulfanlethalitycaused by reproductivebehaviorin Hyalellacurvispina (Crustacea: Amphipoda)
Autor/es:
LOTESTE, A, C.L. NEGRO , M.CASTIGLION, L.E.SENKMAN, P.COLLINS
Revista:
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Editorial:
ACADEMIC PRESS INC ELSEVIER SCIENCE
Referencias:
Lugar: Albany; Año: 2013 vol. 90 p. 121 - 127
ISSN:
0147-6513
Resumen:
Biocidesareperiodicallyappliedinagriculturalactivities,reachingaquaticsystemsandactinguponthe biota.Amphipodsarewidelyusedintoxicitytestsbecauseoftheirsensitivitytoawiderangeof pollutants.Inthiswork,wereportthedifferentiallethalityofawidelyusedpesticide,endosulfan,on the amphipod Hyalellacurvispina at twolifestagesandinthreedifferentadultgroups,malesand femalesseparatedbysexandbothsexesgroupedtogether.Inaddition,oxygenconsumptionofadult groups wasdeterminedasawaytoestimatetheroleofbehavioralactivitiesandexposureto endosulfaninmetabolismshifts.TherewerenodifferencesbetweentheLC50 of juvenilesandthe adultswhentheywereseparatedbysex(p40.05). Nevertheless,theLC50 of adultswithoutsexual differentiationwassignificantlylowerthantheLC50 of juvenilesandadultsseparatedbysex(po0.05). The oxygenconsumptionratewashigherwhenadultsweregroupedwithoutsexualdifferentiationin the controlgroup.Theexposuretolowconcentrationsofendosulfancausesanincreaseinoxygen consumptioninallthetreatments.Thesexualbehaviorincreasedthemetabolismandthesensitivityto endosulfan.Infutureevaluations,adultsgroupedwithoutsexualdifferentiation,whichwerethemost sensitivegroup,shouldbeincludedinordertomimictheenvironmentalconditions.Usingonly juvenilesoradultsseparatedbysexintoxicitytestsmayinaccuratelyestimatethelethalityofbiocides, especiallyinspecieswithconstantreproductiveactivities
