Hiện trạng nuôi cá trắm cỏ (ctenopharyngodone idella) trong lồng trên sông luộc và sông Thái Bình tại huyện Tứ Kỳ, tỉnh Hải Dương

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Tác giả: Minh Anh Kim, Văn Vạn Kim, Văn Hòa Nguyễn, Đình Hoài Trương, Đức Mạnh Vũ

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học Đại học Hạ Long, 2023

Mô tả vật lý: tr.101

Bộ sưu tập: Metadata

ID: 345358

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Bài báo cung cấp thông tin về hiện trạng nuôi cá lồng trên sông Luộc và sông Thái Bình tại huyện Tứ Kỳ, tỉnh Hải Dương trên cơ sở điều tra 149 hộ nuôi cá với 1.133 lồng trong thời gian từ tháng 10/2021 – 01/2022. Các lồng nuôi chủ yếu là cá trắm cỏ (85,35%), có kích cỡ phổ biến là 162 m3 (6m × 9m × 3m, chiếm 89,50%). Mật độ thả 12 – 15 con/m3, cỡ 0,5 – 1,0 kg/con, sử dụng thức ăn công nghiệp 100% và cho cá ăn thức ăn xanh thỏa mãn, chỉ tính riêng thức ăn viên có FCR = 2,5. Cá trắm cỏ nuôi 12 – 15 tháng đạt 6,0 kg/con, năng suất đạt 66,1 kg/m3
giá bán trung bình đạt 48.000 đồng/kg cá, chi phí thức ăn công nghiệp chiếm đến trên 80% giá thành sản phẩm. Cá trắm cỏ nuôi lồng thường bị bệnh xuất huyết, tuột vảy, thối mang. Bệnh thường xảy ra nhiều và gây thiệt hại vào các tháng mùa đông (tháng 10 – 12 năm trước đến tháng 1 năm sau) ở cỡ 1,5 – 2,0 kg/con
tỷ lệ chết cộng dồn lên đến 15% tổng số cá thả. Hiện tại, khu vực này đang nuôi cá trắm cỏ tỷ suất lợi nhuận thấp 6,85%.This paper provided the information of the current status of grass carp cage culture on Luoc and Thai Binh rivers in Tu Ky district, Hai Duong province, based on the results of a survey of 149 households with a total of 1133 fish cages. The survey was carried out from October 2021 to January 2022. This shows that the grass carp takes place mostly in the cage culture system (85,35%) with a popular size of 162 m3 (6m × 9m × 3m). Stocking densities were 12 – 15 fish/m3 at 0,5 – 1,0 kg/fish. All households used pellet feed with an average of FCR = 2,5 plus grass and vegetables. Grass carp cultured for 12 – 15 months reach 6,0 kg/fish with a price of 48.000 VND/kg and production of 66,1 kg/m3 per cage. The pellet feed cost was more than 80% of product costs. Grass carp cage culture often suffers from hemorrhagic disease, scale loss, and gill rot – the disease often occurs and causes damage in the winter months (October to December of last year to January of next year) at the size of 1,5 – 2,0 kg/fish cumulative mortality up to 15% of total stocked fish. Currently, this area is raising grass carp with a low-profit rate of 6,85%. This paper provides information to help the planning region of fish cage culture achieve economic efficiency and sustainable development of fish cage culture on rivers.

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