tailieunhanh - Báo cáo nghiên cứu khoa học: "HI ỆN TRẠNG KHAI THÁC VÀ SỬ DỤNG TÔM SÚ (Penaeus monodon) BỐ MẸ Ở CÀ MAU"

Tuyển tập các báo cáo nghiên cứu khoa học của trường đại học cần thơ trên tạp chí nghiên cứu khoa học đề tài: HI ỆN TRẠNG KHAI THÁC VÀ SỬ DỤNG TÔM SÚ (Penaeus monodon) BỐ MẸ Ở CÀ MAU. | Tạp chí Khoa học 2008 2 188-197 Trường Đại học Cần Thơ HI ỆN TR Ạ NG KHAI THÁC VÀ SỬ DỤNG TÔM SÚ Penaeusmonodon BỐ MẸ Ở cà mau Châu Tài Tảo1 Hoàng Văn Súy và Nguyễn Thanh Phương1 ABSTRACT This survey was carried out at Rach Goc estuary where is considered the main location to provide brood-stock of Penaneus monodon for provinces of the Mekong delta and central provinces. Data was colleted though interviewing 32 fishermen 34 hatcheries in Tan Thuan commune of Dam Doi district and Tan An commune district of Cà Mau 23 traders of level 1 and 13 traders of level 2 were also interviewed to get the information on trading of brood-stock. The results showed that most offishermen capturing brood-stocks came from Bac Lieu province. Average numbers of caught brood-stock were 86 565 females year and 36 564 males year. Average body weight offemales was and that of males was g. Price of brood-stock sold at fishing ground was 709 375-588 250 VND female and 34 063-18 608 VND male. Each fishing boat could catch 2 390 - 1 132 shrimps year. The main fishing grounds were Bai Can about 125km from Rach Goc located at 7-8o45 N latitude and around Khoai island at 103-105oE longitude with the expanse of rock sandy bottom and 30m depth. Each primary traders could provide 3 343-2 934 brood-stock year to hatcheries and other broodstock-related business and brood-stock year to secondary traders conisting of males year and 1 596-1 133 females year. Price of brood-stock provided by primary traders was 826 087-407 771 VND female and 78 043-32 604 VND male. The price was 1 321 154-576 795 VND female and 109 615-12 659 VND male in the case of selling to secondary traders. About 42 000 brood-stocks were used by the hatcheries in Ca Mau per year the remainings were sold to other provinces. Price of broodstock bought by the hatcheries was 1 950 000-410 000 VND female and 120 000-18 745 VND male. Average size of females was 189-13 g ind. .