ĐÁNH GIÁ NGUỒN LỢI CÁC LOÀI CÁ CHÌNH THUỘC GIỐNG ANGUILLA Ở CÁC THỦY VỰC NỘI ĐỊA TỈNH PHÚ YÊN=EVALUATING SOURCE OF IN COME SPECIES OF EEL FISHES GENUS (ANGUILLA) IN WATER LAGOON OF INLAND, PHU YEN PROVINCE

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Thông tin xuất bản: Tạp chí Khoa học- Trường Đại học Phú Yên, 2013

Mô tả vật lý: tr.4

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EVALUATING SOURCE OF IN COME SPECIES OF EEL FISHES GENUS (ANGUILLA) IN WATER LAGOON OF INLAND, PHU YEN PROVINCE Evaluating the benefits of some species of eel fish (Anguilla) in inland water lagoons, Phu Yen province. There are three species of eels in the inland water lagoons in Phu Yen province: the giant mottled eels (Flower eel, scientifically named Anguilla Marmarota Quoy and Gaimard, 1824) distributing large and appearing in all the rivers, streams, ponds, lakes and marshes
the short fin eels (Ebony eel, scientifically named A. Bicolor M'Clelland, 1844) and the sharp, pointed eels, scientifically named A. Malgumora Kaup, 1856) appearing little in the researching sections. The fundamentally appearing period of these species of eels in the raining season is from September to November. The total annual yield exploited of these three species of eels in the inland water lagoons in Phu Yen province are of 16.000 kilograms. The Glass eels from the sea appear in estuary and migrate to the lower, middle and higher sections of a river. The hydroelectric dams on the rivers are exerting huge impacts to the biodiversity of these eel fish. In particular, this limits the distribution and removes the eel species, influencing the yields exploited at the river sections. Some solutions should be implemented to bring up and logically stock the young eel fish to keep the sustainable development of these eel fish resources in the inland water lagoons in Phu Yen province. Key words:Ở các vùng nước nội địa Phú Yên đã xác định được 03 loài cá chình thuộc giống Anguilla. Đó là cá chình hoa Anguilla marmorata Quoy & Gaimard, 1824
cá chình nhọn Anguilla malgumora Kaup, 1856
cá chình mun Anguilla bicolor Mc Clelland, 1884. Qua điều tra nghiên cứu và thu mẫu thì ba loài cá chình này phân bố ở các thủy vực nội địa: lưu vực sông Ba thuộc tỉnh Phú Yên, sông Kỳ Lộ, sông Bàn Thạch, hồ Hảo Sơn, đầm Ô Loan. Trong đó quần thể cá chình hoa có số lượng nhiều và phân bố ở các thủy vực, cá chình mun phân bố ở sông Ba, sông Kỳ Lộ, hồ Hảo Sơn, sông Bàn Thạch và chình nhọn chỉ thấy phân bố ở một số thủy vực như sông Kỳ Lộ, sông Ba, không thấy phân bố ở các thủy vực còn lại, số lượng cá thể của hai loài này giảm sút, ít khi bắt gặp, nguy cơ bị đe dọa rất cao. Đây là những loài quí hiếm xếp bậc VU sách Đỏ Việt Nam (2007) cần được bảo tồn và có những giải pháp hữu hiệu trong việc quản lý khai thác.

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