Feeding Ecology, Movement, Growth, and Stock Assessment of Whitespotted Bamboo Shark, Chiloscyllium plagiosum, in Northern Waters off Taiwan

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Project title

Code/計畫編號

NSC102-2313-B019-008-MY3

Translated Name/計畫中文名

台灣北部海域斑竹狗鮫之攝食生態、移動、成長與資源評估研究

Project Coordinator/計畫主持人

Kwang-Ming Liu

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Institute of Marine Affairs and Resource Management

Website

https://www.grb.gov.tw/search/planDetail?id=8105041

Year

2014

Start date/計畫起

01-08-2014

Expected Completion/計畫迄

31-07-2015

Bugetid/研究經費

1850千元

ResearchField/研究領域

漁業

斑竹狗鮫在台灣北部海域海洋生態系中扮演著重要的角色，然而其生態相關之資訊及資源狀態仍然未知。因此，本研究擬針對本種的攝食生態、成長、移動及資源評估進行研究。斑竹狗鮫樣本將按月於新北市富基漁港進行採集，並帶回實驗室解剖進行食性及年齡成長之研究。攝食生態的研究將結合傳統食性研究的方法與利用穩定性同位素分析的結果配合並比較。利用標識放流進行成長研究之結果將與及過去利用脊椎骨所得之結果進行比較。採樣期間並將持續蒐集斑竹狗鮫之體長資料，經由資料之轉換取得漁獲年齡後，配合漁撈日誌所蒐集之CPUE，進行調整型架構年級群解析法(ADAPT-VPA)，以評估斑竹狗鮫目前之資源狀況。除採樣實驗外，同時亦跟隨漁民出海進行傳統籤之標識放流實驗，以及部分樣本施打四環黴素；藉由標識再捕資料進行斑竹狗鮫之成長參數驗證及輪紋形成週期驗證，並進一步推估其死亡率與系群量。除傳統籤之標識外，同時亦進行超音波標籤(Acoustic tag)之標識，探究斑竹狗鮫之移動、棲地利用情形。最後利用Ecopath with Ecosim軟體，配合前述資料及漁撈日誌資料，進行台灣北部海域海洋生態系統之建構，並模擬在不同政策情況下各漁業資源時空變化之分析並提出管理之建議。The bamboo shark (Chiloscyllium plagiosum) plays an important role in the marine ecosystem in northern Taiwan waters. However, its ecological aspects as well as its population status are poor known. Thus, this study is to examine its feeding ecology, growth, movement, and to evaluate its stock assessment. Specimens for feeding ecology and growth studies will be collected at Fugi fish market on a monthly basis. The results of growth derived from tagging study will be compared with those using vertebral band reading. The length frequency data will be continuously collected during the study period and these data will be converted to catch at age. The catch at age data coupled with CPUE estimated from sampling vessels will be used to conduct the stock assessment of the whitespotted bamboo shark using ADAPT-VPA. Tagging study will be conducted on board using conventional tags and chemical tag (OTC). The tag-recapture data can be used to validate the growth parameters and the periodicity of band pairs formation, as well as to estimate the mortality rate and abundance of whitespotted bamboo shark. The acoustic tag will also be used in tagging study to examine the movement and habitat utilization of whitespotted bamboo shark. Finally, the parameters estimated in this study will be used as the inputs of Ecopath with Ecosim to constitute the marine ecosystem. Furthermore, the Ecosim will be used to simulate the impacts of various fishing pressure and resource management strategies on the ecosystem. Finally, the recommendations and suggestions of management for bamboo shark will be proposed.

Keyword(s)

攝食生態
成長
移動
調整型架構年級群解析法
標識放流
超音波標籤
Ecopath with Ecosim
Feeding ecology
Growth
Movement
ADAPT-VPA
Tag and recapture
Acoustic tag
Ecopath with Ecosim

DSpace CRIS

Feeding Ecology, Movement, Growth, and Stock Assessment of Whitespotted Bamboo Shark, Chiloscyllium plagiosum, in Northern Waters off Taiwan

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