The Study of Arsenic Accumulating on Major Cephalopods Surrounding North Taiwan Waters

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Project title

Code/計畫編號

MOST106-2611-M019-009

Translated Name/計畫中文名

臺灣北部海域主要頭足類體內砷蓄積之研究

Project Coordinator/計畫主持人

Sha-Yen Cheng

Funding Organization/主管機關

National Science and Technology Council

Co-Investigator(s)/共同執行人

廖正信

Department/Unit

Department of Environmental Biology and Fisheries Science

Website

https://www.grb.gov.tw/search/planDetail?id=12244587

Year

2017

Start date/計畫起

01-08-2017

Expected Completion/計畫迄

31-07-2018

Bugetid/研究經費

810千元

ResearchField/研究領域

海洋科學

頭足類在海洋生態系中扮演著關鍵性角色，是掠食者，也是被掠食者，並且有同類為食的習性。頭足類中的鎖管科是臺灣沿近海主要漁獲物種，其中劍尖槍鎖管（Uroteuthis edulis）和軟絲鎖管（Sepioteuthis lessoniana）為臺灣北部鎖管漁場之主要漁獲對象，而軟絲鎖管（Sepioteuthis lessoniana）同時也是休閒漁業目標物種之一。不同體型的鎖管在洄游過程中所攝食的餌料種類會因其營養策略而有所不同，也會受到營養鹽及初級生產力多寡的影響，使其攝食生態有所差異。此外砷是地球上原有的類金屬物質，其中無機砷對人體較具有毒性，而海水中的砷會透過初級生產者進入食物鏈中，並有生物放大的現象。頭足類體內砷含量是水產生物中相對較高者，鎖管食性又與其洄游路徑有關，因此本研究藉由採集臺灣週邊海域水體樣本及鎖管（劍尖槍鎖管及軟絲鎖管）生物樣本與養殖軟絲鎖管生物樣本，進行胃內容物、碳氮同位素分析及砷物種分析，並結合衛星水溫水色及營養鹽資料，來解析棲息環境對於頭足類之食性生態與體內砷物種轉換機制之關係。Cephalopods play a key role in the marine ecosystem, and they are predators, preys, and cannibal. Loliginidae is the primary cephalopod species in coastal waters of Taiwan. Uroteuthis edulis and Sepioteuthis lessoniana are respectively primary catching species in northeastern sea near Taiwan. S. lessoniana is also the target species in recreation fishery. The feeding ecology of the different size Loliginidae are different, and also be affected by nutrients, primary production and migratory. Besides, the arsenic is a metalloid on earth, and it has two groups: inorganic arsenic and organic arsenic. Inorganic arsenic has higher toxin in humans. Arsenic in seawater could enter the food chain by primary production, and it also has the biomagnification. Cephalopods had higher arsenic concentration then other marine organism, and the feeding ecology of Loliginidae was related to the migratory. Therefore, we would collect the seawater samples and biological samples (U. edulis and S. lessoniana), and observe the stomach contents, carbon and nitrogen stable isotope analysis, and arsenic species analysis. The data would be analyzed with environmental factors including satellite surfer seawater temperature, ocean color and nutrient salt. Then, we would understand the relationship among the environment, feeding ecology and the transfer mechanism at arsenic species.

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The Study of Arsenic Accumulating on Major Cephalopods Surrounding North Taiwan Waters

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