Correlation of trace element concentrations between epidermis and internal organ tissues in Indo-Pacific humpback dolphins (Sousa chinensis)

Xian Sun, Ri Qing Yu, Mei Zhang, Xiyang Zhang, Xi Chen, Yousheng Xiao, Yulong Ding, Yuping Wu

Research output: Research - peer-reviewArticle

Abstract

Trace element accumulation in the epidermis of cetaceans has been less studied. This study explored the feasibility of using epidermis as a surrogate tissue to evaluate internal contaminant burdens in Indo-Pacific humpback dolphin (Sousa chinensis). Eleven trace elements were analyzed in the epidermis, muscle and liver tissues from 46 individuals of dolphins stranded along the Pearl River Estuary (PRE) coast between 2007 and 2013. Trace elemental concentrations varied among the three tissues, generally with the highest concentrations found in liver tissues and lowest in the epidermis (except Zn, As, and Pb). Zn concentration in the epidermis was the highest among all tissues, indicating that Zn could be an important element for the epidermis physiology. High concentrations of Hg and Cr in liver were likely due to an excessive intake by dolphins which consumed high Hg and Cr contaminated fishes in the PRE. Hg concentrations in epidermis and muscle tissues were significantly higher in the females than in males. Concentrations of V and Pb in liver, Se and Cd in both muscle and liver, and As and Hg in all tissue samples showed significantly positive relationships with body length. Hepatic Cu concentrations were significantly negatively correlated with the body length. Hg and As concentrations in epidermis showed significantly positive correlations with those in liver tissues. Thus this study proposed that epidermis could be used as a non-invasive monitoring tissue to evaluate Hg and As bioaccumulation in internal tissues of Indo-Pacific humpback dolphins populations.

LanguageEnglish (US)
Pages238-245
Number of pages8
JournalScience of the Total Environment
Volume605-606
DOIs
StatePublished - Dec 15 2017

Fingerprint

dolphin
trace element
organ
tissue
Trace Elements
Tissue
Trace elements
Liver
muscle
Muscle
estuary
river
Estuaries
Rivers
cetacean
bioaccumulation
physiology
pollutant
coast
monitoring

Keywords

  • Epidermis sampling
  • Internal tissues
  • Pearl River estuary
  • Sousa chinensis
  • Trace elements

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

Cite this

Correlation of trace element concentrations between epidermis and internal organ tissues in Indo-Pacific humpback dolphins (Sousa chinensis). / Sun, Xian; Yu, Ri Qing; Zhang, Mei; Zhang, Xiyang; Chen, Xi; Xiao, Yousheng; Ding, Yulong; Wu, Yuping.

In: Science of the Total Environment, Vol. 605-606, 15.12.2017, p. 238-245.

Research output: Research - peer-reviewArticle

Sun, Xian ; Yu, Ri Qing ; Zhang, Mei ; Zhang, Xiyang ; Chen, Xi ; Xiao, Yousheng ; Ding, Yulong ; Wu, Yuping. / Correlation of trace element concentrations between epidermis and internal organ tissues in Indo-Pacific humpback dolphins (Sousa chinensis). In: Science of the Total Environment. 2017 ; Vol. 605-606. pp. 238-245
@article{371d8925a19d4c30b6aa8e00105e5a79,
title = "Correlation of trace element concentrations between epidermis and internal organ tissues in Indo-Pacific humpback dolphins (Sousa chinensis)",
abstract = "Trace element accumulation in the epidermis of cetaceans has been less studied. This study explored the feasibility of using epidermis as a surrogate tissue to evaluate internal contaminant burdens in Indo-Pacific humpback dolphin (Sousa chinensis). Eleven trace elements were analyzed in the epidermis, muscle and liver tissues from 46 individuals of dolphins stranded along the Pearl River Estuary (PRE) coast between 2007 and 2013. Trace elemental concentrations varied among the three tissues, generally with the highest concentrations found in liver tissues and lowest in the epidermis (except Zn, As, and Pb). Zn concentration in the epidermis was the highest among all tissues, indicating that Zn could be an important element for the epidermis physiology. High concentrations of Hg and Cr in liver were likely due to an excessive intake by dolphins which consumed high Hg and Cr contaminated fishes in the PRE. Hg concentrations in epidermis and muscle tissues were significantly higher in the females than in males. Concentrations of V and Pb in liver, Se and Cd in both muscle and liver, and As and Hg in all tissue samples showed significantly positive relationships with body length. Hepatic Cu concentrations were significantly negatively correlated with the body length. Hg and As concentrations in epidermis showed significantly positive correlations with those in liver tissues. Thus this study proposed that epidermis could be used as a non-invasive monitoring tissue to evaluate Hg and As bioaccumulation in internal tissues of Indo-Pacific humpback dolphins populations.",
keywords = "Epidermis sampling, Internal tissues, Pearl River estuary, Sousa chinensis, Trace elements",
author = "Xian Sun and Yu, {Ri Qing} and Mei Zhang and Xiyang Zhang and Xi Chen and Yousheng Xiao and Yulong Ding and Yuping Wu",
year = "2017",
month = "12",
doi = "10.1016/j.scitotenv.2017.06.180",
volume = "605-606",
pages = "238--245",
journal = "Science of the Total Environment",
issn = "0048-9697",
publisher = "Elsevier",

}

TY - JOUR

T1 - Correlation of trace element concentrations between epidermis and internal organ tissues in Indo-Pacific humpback dolphins (Sousa chinensis)

AU - Sun,Xian

AU - Yu,Ri Qing

AU - Zhang,Mei

AU - Zhang,Xiyang

AU - Chen,Xi

AU - Xiao,Yousheng

AU - Ding,Yulong

AU - Wu,Yuping

PY - 2017/12/15

Y1 - 2017/12/15

N2 - Trace element accumulation in the epidermis of cetaceans has been less studied. This study explored the feasibility of using epidermis as a surrogate tissue to evaluate internal contaminant burdens in Indo-Pacific humpback dolphin (Sousa chinensis). Eleven trace elements were analyzed in the epidermis, muscle and liver tissues from 46 individuals of dolphins stranded along the Pearl River Estuary (PRE) coast between 2007 and 2013. Trace elemental concentrations varied among the three tissues, generally with the highest concentrations found in liver tissues and lowest in the epidermis (except Zn, As, and Pb). Zn concentration in the epidermis was the highest among all tissues, indicating that Zn could be an important element for the epidermis physiology. High concentrations of Hg and Cr in liver were likely due to an excessive intake by dolphins which consumed high Hg and Cr contaminated fishes in the PRE. Hg concentrations in epidermis and muscle tissues were significantly higher in the females than in males. Concentrations of V and Pb in liver, Se and Cd in both muscle and liver, and As and Hg in all tissue samples showed significantly positive relationships with body length. Hepatic Cu concentrations were significantly negatively correlated with the body length. Hg and As concentrations in epidermis showed significantly positive correlations with those in liver tissues. Thus this study proposed that epidermis could be used as a non-invasive monitoring tissue to evaluate Hg and As bioaccumulation in internal tissues of Indo-Pacific humpback dolphins populations.

AB - Trace element accumulation in the epidermis of cetaceans has been less studied. This study explored the feasibility of using epidermis as a surrogate tissue to evaluate internal contaminant burdens in Indo-Pacific humpback dolphin (Sousa chinensis). Eleven trace elements were analyzed in the epidermis, muscle and liver tissues from 46 individuals of dolphins stranded along the Pearl River Estuary (PRE) coast between 2007 and 2013. Trace elemental concentrations varied among the three tissues, generally with the highest concentrations found in liver tissues and lowest in the epidermis (except Zn, As, and Pb). Zn concentration in the epidermis was the highest among all tissues, indicating that Zn could be an important element for the epidermis physiology. High concentrations of Hg and Cr in liver were likely due to an excessive intake by dolphins which consumed high Hg and Cr contaminated fishes in the PRE. Hg concentrations in epidermis and muscle tissues were significantly higher in the females than in males. Concentrations of V and Pb in liver, Se and Cd in both muscle and liver, and As and Hg in all tissue samples showed significantly positive relationships with body length. Hepatic Cu concentrations were significantly negatively correlated with the body length. Hg and As concentrations in epidermis showed significantly positive correlations with those in liver tissues. Thus this study proposed that epidermis could be used as a non-invasive monitoring tissue to evaluate Hg and As bioaccumulation in internal tissues of Indo-Pacific humpback dolphins populations.

KW - Epidermis sampling

KW - Internal tissues

KW - Pearl River estuary

KW - Sousa chinensis

KW - Trace elements

UR - http://www.scopus.com/inward/record.url?scp=85021428665&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85021428665&partnerID=8YFLogxK

U2 - 10.1016/j.scitotenv.2017.06.180

DO - 10.1016/j.scitotenv.2017.06.180

M3 - Article

VL - 605-606

SP - 238

EP - 245

JO - Science of the Total Environment

T2 - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

ER -