Organochlorine concentrations (PCBs, DDTs, HCHs, HCB and MIREX) in delphinids stranded at the northeastern Brazil
详细信息 查看全文
- 作者：Elitieri B. Santos-Neto ; Claudio Eduardo Azevedo-Silva ; Tatiana L. Bisi ; Jessica Santos ; Ana Carolina O. Meirelles ; Vitor L. Carvalho ; Alex ; re F. Azevedo ; Jos茅 Eug锚nio Guimar茫es ; Jos茅 Lailson-Brito
- 关键词：Guiana dolphin ; Bioaccumulation ; Cetaceans ; Organochlorines ; Discriminant analysis
- 刊名：Science of the Total Environment
- 出版年：15 February, 2014
- 年：2014
- 卷：472
- 期：Complete
- 页码：194-203
- 全文大小：916 K
文摘
Organochlorine compounds are highly persistent in the environment, causing bioaccumulation and biomagnification through the marine food chain. To verify the bioaccumulation pattern of DDT and its metabolites, as well as PCBs, Mirex, HCHs and HCB, samples of subcutaneous adipose tissue from 25 Guiana dolphins (Sotalia guianensis), two Fraser's dolphins (Lagenodelphis hosei), two spinner dolphins (Stenella longirostris), one spotted dolphin (Stenella frontalis), and one striped dolphin (Stenella coeruleoalba) were analyzed. The collected specimens were found stranded in northeastern Brazil between 2005 and 2011. The concentrations were reported in 渭g路g鈭?#xA0;1 lip, varying from 0.02 to 17.3 for 危PCB, from 0.003 to 5.19 for 危DDT, from 0.005 to 0.16 for 危HCH, from 0.002 to 0.16 for HCB, and from 0.02 to 2.38 for Mirex. The PCBs dominated the bioaccumulation pattern for both the Guiana and spinner dolphins; for the other species, DDT was the major compound. A discriminant function analysis revealed the differences in the organochlorine accumulation patterns between the Guiana dolphin (S. guianensis) and the continental shelf/oceanic dolphins (S. frontalis and S. longirostris). The results also show that the concentrations of organochlorine compounds found in the delphinids in northeastern Brazil were lower than the delphinids found in other regions of Brazil, as well as other locations worldwide with intense agroindustrial development and/or a larger population.