https://scholars.lib.ntu.edu.tw/handle/123456789/348219
標題: | Spatio-temporal variation in the elemental compositions of otoliths of southern bluefin tuna Thunnus maccoyii in the Indian Ocean and its ecological implication | 作者: | Wang, C.H. Lin, Y.T. Shiao, J.C. You, C.F. Tzeng, W.N. JEN-CHIEH SHIAO |
關鍵字: | Migratory environmental history; Ontogenetic change; Otolith elemental composition | 公開日期: | 2009 | 卷: | 75 | 期: | 6 | 起(迄)頁: | 1173-1193 | 來源出版物: | Journal of Fish Biology | 摘要: | The elements Na, Mg, Mn, Ca, Sr and Ba in otoliths of southern bluefin tuna Thunnus maccoyii, collected from their feeding ground in the central Indian Ocean and spawning ground between southern Java and north-western Australia were measured by laser-ablation inductively coupled plasma mass spectrometry (LA-ICPMS) and compared among sampling locations and developmental stages. The Na, Mg and Mn to Ca concentration ratios were significantly higher at the larval stage than at the adult stage, and the ratio reached a peak at the first inflection point of the otolith, mean ±s.d. 43·3 ± 4·9 days after hatching and decreased sharply to a low level thereafter. The temporal change of the elements:Ca ratios in the first inflection point corresponded to the life stage transition from larva to juvenile, indicating that the uptake rate of elements from ambient waters was significantly influenced by the ontogenetic change in the fish. The elemental composition at the otolith edge differed significantly in sub-adults on the feeding grounds and adults on the spawning grounds. Thus, the otolith elemental composition can be used as a biological tracer to study the time of the ontogenetic shift and to reconstruct the past migratory environmental history of T. maccoyii. In addition, the elemental composition of the otolith core of the adult was similar between feeding and spawning grounds, indicating that the fish in the Indian Ocean had the same larval origin, which is consistent with the single spawning population hypothesis. © 2009 The Fisheries Society of the British Isles. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-70449433046&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/348219 |
DOI: | 10.1111/j.1095-8649.2009.02336.x | SDG/關鍵字: | biological marker; animal; article; chemistry; growth, development and aging; Indian Ocean; marine biology; metabolism; time; tuna; vestibule; Animals; Biological Markers; Indian Ocean; Marine Biology; Otolithic Membrane; Time Factors; Tuna; Scombridae; Thunnus maccoyii |
顯示於: | 海洋研究所 |
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