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Concentration of statolith trace elements in the jumbo flying squid during El Niño and non-El Niño years in the eastern Pacific

Published online by Cambridge University Press:  09 October 2002

Yuzuru Ikeda ,
Akihiko Yatsu ,
Nobuaki Arai  and
Wataru Sakamoto
Yuzuru Ikeda
Affiliation:
Brain Science Institute, RIKEN, Wako, Saitama 351-0198, Japan
Akihiko Yatsu
Affiliation:
National Research Institute of Fisheries Science, Yokohama, Kanagawa 231-8648, Japan
Nobuaki Arai
Affiliation:
Graduate School of Informatics, Kyoto University, Kyoto 606-8501, Japan
Wataru Sakamoto
Affiliation:
Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
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Abstract

Statoliths of the jumbo flying squid Dosidicus gigas (Cephalopoda: Ommastrephidae) in the eastern Pacific in 1995, 1996 (non-El Niño years) and 1997 (El Niño year) were analysed to observe whether unusual temperature increases due to El Niño was recorded in the concentration of trace elements. In addition to calcium (the major element), trace elements of manganese (Mn), iron (Fe), copper (Cu), zinc (Zn), and strontium (Sr) were detected. Strontium concentration in the calcified tissue of some aquatic animals changes with environmental variables. However, yearly comparisons revealed that Sr concentration did not significantly differ between the El Niño year and non-El Niño years. Instead, the Sr concentration differed with squid habitats. Strontium concentration in statoliths of D. gigas from Peruvian waters (high salinity) was significantly higher than those from Costa Rican waters (low salinity) regardless of El Niño.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 82 , Issue 5 , October 2002 , pp. 863 - 866
Copyright
2002 Marine Biological Association of the United Kingdom

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