Concentrations of DDE in Blubber Biopsies of Free-Ranging Long-Beaked Common Dolphin (Delphinus capensis) in the Gulf of California

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• 作者：Juan Pablo Gallo-Reynoso ; Tiffany B. Malek…
• 关键词：4 ; 4-DDT ; Common Dolphins ; Delphinus capensis ; Gulf of California
• 刊名：Bulletin of Environmental Contamination and Toxicology
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：94
• 期：1
• 页码：6-11
• 全文大小：276 KB
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• 刊物主题：Pollution, general; Environmental Health; Ecotoxicology; Soil Science & Conservation; Environmental Chemistry; Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution;
• 出版者：Springer US
• ISSN：1432-0800

文摘

Long-beaked common dolphins (Delphinus capensis) in the Gulf of California have been exposed to persistent contaminants that originated in large agricultural areas near the coast. Live common dolphins were sampled by remote dart biopsies to determine concentrations of tDDT in blubber. Life stage and initial gender identification was determined by field observations. Gender was confirmed by genetic analysis of the skin. Concentration of tDDT in blubber was analyzed by gas chromatography. The 16 samples collected consisted of: 2 adult males, 6 adult females, and 8 juveniles. 4,4-DDE was detected in most of the samples with 4,4-DDD and 4,4-DDT under detection levels. Concentrations of DDE varied from non-detectable to 87.3?μg/g lipid weight with a median of 16?μg/g lipid weight. The highest concentration was detected in an immature female. No differences were detected between gender or life stage but this could be attributed to small sample size. We recommend continued sampling of D. capensis blubber biopsies from the Gulf of California in order to relate these levels with affected in vitro biomarkers such as mixed function oxidase activity.