飼育水温がヒラメ稚魚耳石の元素組成に及ぼす影響  [in Japanese] Effect of Water Temperature on the Elemental Composition of Otoliths from the Juvenile Japanese Flounder, Paralichthys olivaceus  [in Japanese]

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Author(s)

    • 角田 出 KAKUTA Izuru
    • 石巻専修大学理工学部生物生産工学科 Department of Biotechnology, Senshu University of Ishinomaki

Abstract

1) 耳石の元素組成の変化から魚類の生息環境履歴を捉えるための基礎資料を得ることを目的として, 飼育水温の違い(9℃, 12℃, 15℃, 19℃, 22℃, 25℃) がヒラメ稚魚耳石の元素組成に及ぼす影響を調べた.<BR>2) 荷電粒子励起X線放射化 (PIXE) 法は耳石中元素の高感度検出法として有効であった.<BR>3) 耳石のSr/Ca比と生息水温の間には, 水温12℃から22℃の範囲において, 負の相関が認められた.<BR>4) 水温9℃から25℃の範囲において, 耳石のCl濃度およびCl/Ca比と水温の間には負の相関が, Zn濃度およびZn/Ca比と水温の間には正の相関が認められた.<BR>5) 耳石のK, Fe, Mn, Cuの濃度および当該元素とCa濃度の比と水温の間には有意な関係は認められなかった.<BR>6) 耳石のSr/Ca比, Cl濃度, Cl/Ca比, Zn濃度, Zn/Ca比は魚の生息水温履歴を予測する際の有効な指標となる可能性がある.

The effect of temperature on the elemental composition of sagittae (otoliths) taken from the juvenile Japanese flounder <I>Paralichthys olivaceus</I>, reared at constant temperatures (9, 12, 15, 19, 22 and 25°C) for one month, was studied using particle induced X-ray emissions (PIXE). Several elements were detected in the otoliths; not only calcium (Ca), chloride (Cl), strontium (Sr) and potassium (K), but also iron (Fe), zinc (Zn), manganese (Mn) and copper (Cu). The PIXE technique proved to be an effective tool for performing multielement analysis in small fish otolith. The strontium-calcium (Sr/Ca) concentration ratios of lab-reared juvenile flounder were inversely proportional to the respective cultivating temperatures (body growth rate) between 12°C and 22°C. The Cl concentrations and the chloride-calcium (Cl/Ca) concentration ratios were inversely proportional to the respective culfivation temperatures between 9°C and 25°C. On the other band, the Zn concentrations and the zinc-calcium (Zn/Ca) concentration ratios were directly proportional to the cultivation temperatures within the same range. No significant changes in other element concentrations and each of these/Ca concentration ratios in the otoliths were found. These results indicate that there is it may be possible to use the relationship between the elemental composition of otoliths and the ambient temperature as a means of reconstructing the life history of this fish.

Journal

  • Bulletin of the Society of Sea Water Science, Japan

    Bulletin of the Society of Sea Water Science, Japan 50(5), 349-355, 1996-10

    The Society of Sea Water Science, Japan

References:  20

Cited by:  1

Codes

  • NII Article ID (NAID)
    10008280165
  • NII NACSIS-CAT ID (NCID)
    AN0018645X
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03694550
  • NDL Article ID
    4045615
  • NDL Source Classification
    ZM44(科学技術--地球科学--海洋・陸水・火山) // ZP8(科学技術--化学・化学工業--無機化学・無機化学工業)
  • NDL Call No.
    Z15-47
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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