海洋軟體動物內骨骼之環境紀錄：以烏賊骨板為例

Environmental Record in the Internal Shell of Marine Molluscs: The Case of Cuttlebone

鍾明宗(Ming-Tsung Chung) ； 游鎮烽(Chen-Feng you) ； 王佳惠(Chia-Hui Wang)

《國立臺灣博物館學刊》 64卷2期 (2011/06) Pp. 17-31

摘要

骨板是烏賊的內骨骼，其主要成分為碳酸鈣，且其形態依種類而異。過去曾有學者研究骨板上的輪紋當作一成長形質，並嘗試用以回推族群成長率。但是骨板的形成機制、週期性，以及其化學組成如何反應海水溫度及鹽度的研究尚屬少數。過去曾有研究分析頭足類化石－箭石內骨髓中的微量元素及其同位素組成，進一步用以回推古海洋環境變遷。本文簡述骨板之功能、形態、成分、結構及應用，並初步分析烏賊骨板中的種化學元素組成，比較採自屏東東港、臺東成功以及澎湖等，三個不同海域之虎斑鳥賊骨板元素濃度之差異，以及同樣採自屏東海域中的三個不同烏賊物種，包括尖烏賊、短穗烏賊和虎斑鳥賊之骨板元素濃度異同，希望能更了解烏賊硬組織形成的機制，也期能將烏賊骨板應用在現代海洋環境變遷之研究。

關鍵字

烏賊 ； 骨板 ； 箭石 ； 環境變遷

並列摘要

Cuttlebone is the endoskeleton of cuttlefish, composed mainly by carbonate in aragonite form, and the morphology is species-specific. Past fisheries studies use the increment on cuttlbone as growth parameter to back-calculate population growth rate. However, researches on the mechanism and periodicity of cuttlebone increment formation and how it reflects the abiotic environment in water are still limited. Studies measured both trace elements and stable isotopes on the extinct marine cephalopod, belemnoids as a geochemical record for past environmental change had been done for years. Therefore, the function , morphology, chemical composition, structure and application studies on cuttlebones are introduced. A preliminary result on 15 elements in cuttlebone is showed. Geographic differences of elements/ calcium ratio of Sepia pharaonis among three sampling locations, including Donkang (Pingtung), Chengkung (Taitung) and Penghu, and also interspecies differences among Sepia aculeate, Sepia brevimana and Speia pharaonis collected from Pingtung coastal area are analyzed. In the future, more comprehensive knowledge on the mechanism of formation, and also on the possibility of the application to modern marine environmental change should be focused.

並列關鍵字

Cuttlefish ； Cuttlebone ； Belemnoid ； Environmental Change

參考文獻

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