Occurrence and trophic magnification profile of triphenyltin compounds in marine mammals and their corresponding food webs

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

2 Scopus Citations
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Author(s)

  • Ronia Chung-tin Sham
  • Lily Shi Ru Tao
  • Yanny King Yan Mak
  • Jason Kin Chung Yau
  • Tak Cheung Wai
  • Kevin King Yan Ho
  • Guang-Jie Zhou
  • Yongyu Li
  • Xinhong Wang

Detail(s)

Original languageEnglish
Article number105567
Journal / PublicationEnvironment International
Volume137
Online published19 Feb 2020
Publication statusPublished - Apr 2020

Link(s)

Abstract

The occurrence of triphenyltin (TPT) compounds, a highly toxic antifouling biocide, has been documented in marine environments and organisms all over the world. While some studies showed that marine mammals can be used as sentinel organisms to evaluate the pollution status of emerging contaminants in the environment because of their long lifespans and high trophic levels, information regarding the contamination status of TPT in marine mammal species has been limited over the past decade. More importantly, the primary bioaccumulation pathway of TPT in these long-lived apex predators and the corresponding marine food web is still uncertain. Therefore, this study aimed to evaluate the contamination statuses of TPT in two marine mammal species, namely the finless porpoise and the Indo-Pacific humpback dolphin, and assess the trophic magnification potential of TPT along the food webs of these two species, using stable isotope analysis, and chemical analysis with gas chromatography-mass spectrometry. The results showed that TPT is the predominant residue in majority of the analyzed individuals of two marine mammals, with concentrations ranging from 426.2 to 3476.6 ng/g wet weight in their muscle tissues. Our results also demonstrated an exponential increase in the concentration of TPT along the marine food web, indicating that trophic magnification occurs in the respective food webs of the two marine mammals. The range of trophic magnification factors of TPT in the food webs of finless porpoise and Indo-Pacific humpback dolphin was 2.51–3.47 and 2.45–3.39, respectively. These results suggest that high trophic organisms may be more vulnerable to the exposure of TPT-contaminated environments due to the high trophic magnification potential, and thus ecological risk of these compounds ought to be assessed with the consideration of their bioaccumulation potentials in these marine mammals.

Research Area(s)

  • Biomagnification, Food web, Marine mammal, Organotin compounds, Stable Isotope

Citation Format(s)

Occurrence and trophic magnification profile of triphenyltin compounds in marine mammals and their corresponding food webs. / Sham, Ronia Chung-tin; Tao, Lily Shi Ru; Mak, Yanny King Yan; Yau, Jason Kin Chung; Wai, Tak Cheung; Ho, Kevin King Yan; Zhou, Guang-Jie; Li, Yongyu; Wang, Xinhong; Leung, Kenneth Mei Yee.

In: Environment International, Vol. 137, 105567, 04.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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