Nghiên cứu này nhằm khảo sát nguồn lợi và hiện trạng nghề nuôi tu hài ở Vân Đồn, tỉnh Quảng Ninh hiện nay. Số liệu trong bài được thu thập qua khảo sát, điều tra và phỏng vấn nhanh người dân. Kết quả khảo sát thu được tại Vân Đồn chủ yếu là loài tu hài Lutraria rhychaena, Jonas 1844 phân bố với mật độ dao động từ 0,1-0,2 con/m2 , loài Lutraria arcuata Deshayes in Reeve,1854 chỉ xuất hiện với mật độ rất ít ở Đông Xá. | TNU Journal of Science and Technology 226 10 211 - 219 CURRENT SITUATION OF RESOURCES AND Lutraria rhynchaena IN VAN DONG DISTRICT QUANG NINH PROVINCE Trieu Anh Tuan1 4 Thai Thanh Binh2 Bui Huu Son3 Nguyen Xuan Viet4 1Hung Vuong University 2Fisheries and Technical Economic College 3Quang Ninh Fisheries Breeding and Technical Science Centre 4Hanoi National University of Education ARTICLE INFO ABSTRACT Received 13 4 2021 This study aims to assess the resources and the current status of the art of shrimp farming in Van Don Quang Ninh province today through investigation and Revised 7 7 2021 survey. The data in the article are collected through methods of quick survey Published 13 7 2021 investigation and interviews with people. The results obtained at Van Don mainly distributed the comedones Lutraria rhychaena Jonas 1844 with density ranging from 0 1-0 2 species m2 species Lutraria arcuata Deshayes in Reeve 1854 only KEYWORDS appears in Dong Xa with very little density. The area of distribution of these two species has been pushed offshore the aquatic resources are seriously reduced and Otter clam the cultivated area is being replaced by a number of other mollusks. Through a Van Don survey of 400 1250 households with aquaculture jobs in 8 towns and townships in Onserve Van Don district 152 households still maintain the profession of cultivating comedy the farming households are scattered in the district with very small area Profit out of a total of 2 100 ha of mollusk farming. The stocking density is from 25-50 Mollucs raising techniques commercial cage the seeding season is from April to September every year. Culture time is from 10-12 months crop harvested size from 20-40g head 25-50 g kg harvested output is 23 4 tons ha revenue is 2 34 billion VND. bring profits to farmers about 0 669 billion VND. The study has provided information about the resources and distribution area of Lutrariar rhynchaena in Van Don at the same time assessed the current status and .
