TY - JOUR
T1 - Factors influencing otolith strontium/calcium ratios in Anguilla japonica elvers
AU - Kawakami, Yutaka
AU - Mochioka, Noritaka
AU - Morishita, Koichiro
AU - Tajima, Toshihiro
AU - Nakagawa, Hisaki
AU - Toh, Hidetoshi
AU - Nakazono, Akinobu
PY - 1998
Y1 - 1998
N2 - The effects of temperature and salinity on the concentration ratios of strontium (Sr) to calcium (Ca) within the sagittal otoliths of elvers of the Japanese eel, Anguilla japonica, were studied by spot analysis using a wavelength dispersive X-ray electron microprobe. A total of 340 elvers were used: 100 elvers were reared for 15 days under various salinity conditions (freshwater, one-third seawater, two-thirds seawater and pure seawater at 22 °C; 240 elvers were reared for 58 days under various water temperature conditions (12,17, 22, 27 °C) in either freshwater or pure seawater. Otolith Sr/Ca ratios were found to be positively correlated with water salinity. On the other hand, the Sr/Ca ratios were not found to be significantly different among the various temperature groups. The above results strongly suggest that the physiological mechanism of incorporation of Sr and Ca within the otolith of an eurythermal fish, Japanese eel, does not change within this range of temperatures (12-27 °C).
AB - The effects of temperature and salinity on the concentration ratios of strontium (Sr) to calcium (Ca) within the sagittal otoliths of elvers of the Japanese eel, Anguilla japonica, were studied by spot analysis using a wavelength dispersive X-ray electron microprobe. A total of 340 elvers were used: 100 elvers were reared for 15 days under various salinity conditions (freshwater, one-third seawater, two-thirds seawater and pure seawater at 22 °C; 240 elvers were reared for 58 days under various water temperature conditions (12,17, 22, 27 °C) in either freshwater or pure seawater. Otolith Sr/Ca ratios were found to be positively correlated with water salinity. On the other hand, the Sr/Ca ratios were not found to be significantly different among the various temperature groups. The above results strongly suggest that the physiological mechanism of incorporation of Sr and Ca within the otolith of an eurythermal fish, Japanese eel, does not change within this range of temperatures (12-27 °C).
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U2 - 10.1023/a:1007415420540
DO - 10.1023/a:1007415420540
M3 - Article
AN - SCOPUS:0031902505
SN - 0378-1909
VL - 52
SP - 299
EP - 303
JO - Environmental Biology of Fishes
JF - Environmental Biology of Fishes
IS - 1-3
ER -