Ecogeochemistry Research for Investigating Migration Pattern and Population Ecology of Mullet around Taiwan

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Project title

Code/計畫編號

NSC102-2621-B019-006-MY3

Translated Name/計畫中文名

以生態地化研究來解析台灣附近烏魚之洄游模式及族群生態

Project Coordinator/計畫主持人

Chia-Hui Wang

Funding Organization/主管機關

National Science and Technology Council

Co-Investigator(s)/共同執行人

沈康寧

Department/Unit

Department of Environmental Biology and Fisheries Science

Website

https://www.grb.gov.tw/search/planDetail?id=11274071

Year

2015

Start date/計畫起

01-08-2015

Expected Completion/計畫迄

01-07-2016

Bugetid/研究經費

1220千元

ResearchField/研究領域

海洋科學

"烏魚分布在全球南北緯42°間的沿近海、河口域以及河川中下游水域，是熱帶、亞熱帶最常見的河口依賴型海洋性魚類。成熟烏魚則於冬至前後聚集台灣西南沿海產卵，為我國冬季最重要的經濟魚種之一。近年來已有研究利用分子生物技術詳細分析了整個西北太平洋烏魚種群遺傳結構，結果顯示西北太平洋有三個烏魚的隱蔽種，本計畫將結合分子生物技術以及耳石生態地球化學技術，收集棲息於台灣主要河川中、沿近岸於台灣海峽和東北部海域產卵烏魚成體，以及孵化後入添至河口的烏魚苗個體，解析烏魚之族群時空分布，以及各族群之洄游模式及生態習性，分析包括耳石微量元素指紋圖和包括氧、鍶、硫、碳及氮等同位素，詳細解析烏魚的鹽度及微棲地洄游歷程、代謝及食性以及環境污染等不同生態學研究。此外由於烏魚為廣溫、廣鹽性的魚類，且其污染耐受度也高，本計畫也將進一步透過耳石及魚體不同組織之微量金屬及同位素分析，研究用烏魚當作生物指標來作為環境監測的方法。" "Flathead mullet Mugil cephalus distributes world widely from around 42oN to 42oS latitude, and inhabits in coastal water, estuarine, and freshwater river, and is an abundant estuarine-dependent marine fish species. Matured mullet migrates southward to southwestern Taiwan for spawning during winter and is one of the most economically important fishery species. Recent year, research using a set of ten microsatellites and one mtDNA (COI) locus to analysis the population structure of mullet in the northwestern Pacific, and three cryptic species of M. cephalus were identified within this region. This project aim to combine the molecular biotechnology and otolith ecogeochemistry to investigate the spatial and temporal population distribution, migration pattern and ecology of different population of mullet near Taiwan. We will collect mullet individuals inhabiting in Taiwan main rivers, spawning migration individuals from Taiwan Strait and northeastern Taiwan and mullet larvae from estuaries, and analysis otolith elemental fringerprint and oxygen, strontium, sulfur, carbon and nitrogen isotopes of different population. The detail transhaline and micro-habitat movement, metabolism and trophic habit change, and environmental pollution history pattern will be discussed. Mullet is tolerant to temperature, salinity and pollution, and current project also aims to evaluate the method to use mullet as bioindicator for environmental monitoring methodology for future application."

Keyword(s)

烏魚
生態地球化學
耳石
族群結構
生物指標
Mullet
ecogeochemistry
otolith
population structure
bioindicator

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Ecogeochemistry Research for Investigating Migration Pattern and Population Ecology of Mullet around Taiwan

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