Conservation and Sustainable Management of Acanthopagrus genus Bioresource

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Project title

Code/計畫編號

MOST104-2313-B019-004

Translated Name/計畫中文名

台灣黑鯛屬魚類遺傳資源之永續經營

Project Coordinator/計畫主持人

Jin-Chywan Gwo

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Aquaculture

Website

https://www.grb.gov.tw/search/planDetail?id=11576900

Year

2015

Start date/計畫起

01-08-2015

Expected Completion/計畫迄

31-07-2016

Bugetid/研究經費

700千元

ResearchField/研究領域

漁業

"台灣長期放流重要經濟水產養殖魚苗藉以補充復原枯竭的魚源。養殖魚苗會造成嚴重的遺傳效應。本研究擬建構台灣重要的經濟鯛科魚類一黑鯛屬(Acanthopagrus)遺傳資源的保存管理模式。由於台灣海域存在6種黑鯛屬物種，本研究將以分子標記首先進行物種與品種之鑑定，與建立國内各海域野生黑鯛屬魚類之遺傳參數，並和國外比較；用以評估黑鯛屬魚類水產養殖種原管理及人工放流的理論基礎，並視育種或人工放流之需要，提供合適規晝。具體工作為：1.物種、品種的鑑定，篩選保存各種特殊品種；2.調查國内各海域野生與養殖黑鯛之遺傳多樣性，是否有近親交配、無意識的雜交造成種質衰退、族群過小釀成遺傳漂變等現象，以分子標記藉由親子鑑定評估人工養殖種苗放流的效果；3. 以精液凍結保存的方式收集各地區珍貴品種之配子並長期儲存種質資源。經由人工受精，提供後續分子標記之分析。最後根據研究對象魚種之生產模式，規劃永續的種苗生產設施，制定實用的種魚遺傳資源的管理規範。" Stock enhancement has been proposed as a means to increase the depleted fish stocks for decades in Taiwan. Continuous massive releases of hatchery fish or artificial seed have raised concerns about the negative genetic effects on wild populations. Hatchery fish or aquaculture seed had caused considerable genetic change (reduce genetic variability and lower the genetic diversity) in the next generation. The possible genetic effects of releases have become a focal point when evaluating the effectiveness of stock enhancement program recently. Long-term monitoring changes in genetic diversity and tracing the pedigree in aquaculture operations using molecular markers had proved to be a power tool for genetic assessment and was proposed as a routine practice. Black sea bream (Acanthopagrns schlegelii) is one of the most economical important marine stock enhancement and aquaculture species in Taiwan. Because six Acanthopagrus species have been reported in Taiwan waters, I will identify the correct species and evaluate the genetic structure (allele frequency, hererozygosities, inbreeding coefficient, effective population size) of natural and hatchery-released fish from different locations using molecular markers. Stock and cryopreserve the valuable and special stock semen for future breeding and genetic improvements. I will also design programs: to maintain the genetic quality of hatchery population being the same with wild population, to minimize the genetic impact to wild population, and to maximize the success of stock enhancement stocking. Risk management within the hatchery is an important precaution, before releasing the aquaculture seed into the wild.

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Conservation and Sustainable Management of Acanthopagrus genus Bioresource

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