論文

基本情報

氏名 太田 千穂
氏名(カナ) オオタ チホ
氏名(英語) CHIHO OHTA
所属 中村学園大学 栄養科学部 栄養科学科
職名 准教授

題名

Mercury, cadmium, zinc and copper concentrations and stable isotope ratios of carbon and nitrogen in tiger sharks (Galeocerdo cuvier) culled off Ishigaki Island, Japan

単著・共著の別

 

著者

Tetsuya Endo
Osamu Kimura
Hideki Ogasawara
Chiho Ohta
Nobuyuki Koga
Yoshihisa Kato
Koichi Haraguchi

担当区分

 

概要

We analyzed Hg, Cd, Zn and Cu in the liver as well as Hg and stable isotope ratios of carbon and nitrogen (delta C-13 and delta N-15) in muscle from tiger sharks (Galeocerdo cuvier) in Japan. The Hg concentration in the muscle increased slightly and proportionally with increases in body length, but the Hg concentration in the liver increased markedly after maturation (exceeding 2.7 m precaudal length). The Hg concentration in the liver of mature shark was higher than that in the muscle. The Cd concentration in the liver increased with increases in body length. On the other hand, the Zn and Cu concentrations in the liver decreased during the growth stage, but thereafter increased with increased Cd burden due to growth. The marked increase in hepatic Hg in mature sharks may be explained by the continuous intake of Hg via food, slower growth and Hg Se complex formation. High concentrations of Zn and Cu in the liver of immature sharks and concomitant increases in Zn and Cu with the Cd burden in the liver of mature sharks may be explained by the physiological requirements of Zn and Cu during the growth stage, the induction of metallothionein synthesis due to the Cd burden and the subsequent binding of these metals to metallothionein. The delta N-15 and delta C-13 values decreased with increases in body length, suggesting a shift from coastal feeding to pelagic feeding with shark growth. The Hg and Cd concentrations tended to be negatively correlated with the delta N-15 and delta C-13 values as a result of the increase in Hg and Cd accumulation due to the growth and the decreases in delta N-15 and delta C-13 values due to the sift of feeding area. (C) 2015 Elsevier Ltd. All rights reserved.

発表雑誌等の名称

ECOLOGICAL INDICATORS

出版者

ELSEVIER SCIENCE BV

55

 

開始ページ

86

終了ページ

93

発行又は発表の年月

2015-08

査読の有無

有り

招待の有無

無し

記述言語

英語

掲載種別

研究論文(学術雑誌)

国際・国内誌

 

国際共著

 

ISSN

 

eISSN

 

DOI

10.1016/j.ecolind.2015.03.008

Cinii Articles ID

 

Cinii Books ID

 

Pubmed ID

 

PubMed Central 記事ID

 

形式

無償ダウンロード

JGlobalID

 

arXiv ID

 

ORCIDのPut Code

 

DBLP ID