INVESTIGADORES
POLIZZI Paula Sabrina
artículos
Título:
Metals as chemical tracers to discriminate ecological populations of threatened Franciscana dolphins (Pontoporia blainvillei) from Argentina
Autor/es:
ROMERO, MA. BELEN; POLIZZI PAULA; CHIODI BOUDET, LEILA; ROBLES, ALICIA; DAS, KRISHNA; GERPE, M.
Revista:
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Editorial:
SPRINGER HEIDELBERG
Referencias:
Lugar: HEIDELBERG; Año: 2016
ISSN:
0944-1344
Resumen:
Franciscana dolphins are the most impacted smallcetacean in the Southwestern Atlantic Ocean, classified asVulnerable A3d by IUCN. Essential (Fe, Mo, Mn, Cr, Ni,Co) and non-essential (Ag, Pb, Sn) trace elements (TEs) weremeasured in liver, kidney, and brain samples of by-catchFranciscana dolphins that were living in estuarine (n = 21)and marine (n = 21) habitats (1) to assess whether TEs poseda threat and (2) to evaluate the suitability of TEs for discriminatingecological populations of this species in Argentineanwaters. Essential TEs showed little variation in tissues fromboth groups in agreement with levels reported for other cetaceansand suggesting that these concentrations correspond tonormal physiological levels. Non-essential TEs were higher inestuarine juveniles and adults dolphins than in marine specimens.These results suggest anthropogenic sources associatedwith estuarine area and that Franciscana dolphins are goodsentinels of the impact of the environment. The difference inthe concentrations of TEs beetwen ecological populations appearedto be related to distinct exposures in both geographicalareas, and it is suggested that Ag and Sn concentrations inadults are good chemical tracers of anthropogenic input ofTEs. These results provide additional information for improvedmanagement and regulatory policy.