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Titolo:
Organochlorine compounds in common dolphins (Delphinus delphis) from the Atlantic and Mediterranean waters of Spain
Autore:
Borrell, A; Cantos, G; Pastor, T; Aguilar, A;
Indirizzi:
Univ Barcelona, GRUMM, E-08028 Barcelona, Spain Univ Barcelona BarcelonaSpain E-08028 , GRUMM, E-08028 Barcelona, Spain
Titolo Testata:
ENVIRONMENTAL POLLUTION
fascicolo: 2, volume: 114, anno: 2001,
pagine: 265 - 274
SICI:
0269-7491(2001)114:2<265:OCICD(>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
SEALS PHOCA-VITULINA; BOTTLE-NOSED DOLPHINS; BALTIC GRAY SEAL; HARBOR SEALS; COASTAL WATERS; POLYCHLORINATED-BIPHENYLS; STENELLA-COERULEOALBA; REPRODUCTIVE TRANSFER; MARINE MAMMALS; BELUGA WHALES;
Keywords:
organochlorine; PCB; DDT; common dolphins; Spain;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
52
Recensione:
Indirizzi per estratti:
Indirizzo: Borrell, A Univ Barcelona, GRUMM, Parc Cientif Barcelona,Baldiri Reixac 6,E-08028 Barcelona, Spain Univ Barcelona Parc Cientif Barcelona,Baldiri Reixac 6 Barcelona Spain E-08028
Citazione:
A. Borrell et al., "Organochlorine compounds in common dolphins (Delphinus delphis) from the Atlantic and Mediterranean waters of Spain", ENVIR POLLU, 114(2), 2001, pp. 265-274

Abstract

Blubber of free-ranging common dolphins (Delphinus delphis) from the northwestern coast of Spain (Atlantic), sampled in 1984 and 1996, and of common dolphins entangled in fishing nets in the southwestern Mediterranean, sampled during 1992-1994, was analysed for organochlorine pollutants. In the Atlantic, concentration of all pollutants was significantly higher in males than in females. The overall tPCB/tDDT ratio in this area was 3.35, which indicates a predominance of industrial inputs over those associated with agriculture. Individuals sampled in 1996 showed significantly lower DDT concentrations but a higher ppDDE/tDDT ratio than those sampled in 1984, which reflects the aging of the environmental load. In the same period, tPCB concentration remained constant and, as a consequence, the tPCB/tDDT ratio more than doubled. In the Mediterranean, the reduced sample size of adult individuals precluded proper statistical investigation of sex-related variation. Theoverall tPCB/tDDT ratio was 1.12, suggesting a higher contribution of pollutants of agricultural origin. individuals had significantly higher levels of all DDT forms and a higher ppDDE/tDDT ratio than their counterparts fromthe Atlantic, but similar PCB concentrations. However, the relative frequency of the different congeners in relation to the total PCB load was different in the two areas. This indicates that the two populations do not mix, at least in the short- or medium-term. Organochlorine levels in both areas are at the mid to low end of the range of concentrations detected in other common dolphin populations and in that of other Delphinidae species from thesame region. Although the impact of the organochlorine concentrations on the common dolphin populations surveyed cannot be assessed, it is consideredunlikely that they have played a significant role in the decline that the species has suffered in recent decades in the western Mediterranean. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/09/20 alle ore 02:13:05