Ảnh hưởng của mật độ luân trùng (Brachionus plicatilis) lên sinh trưởng và tỉ lệ sống của cá song trân châu ở giai đoạn ương từ cá bột lên 18 ngày tuổi=Effects of rotifer density (Brachionus plicatilis) on growth and survival rate of pearl grouper at the nursery stage from fry to 18 days old

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Tác giả: Minh Tuấn Hoàng, Thị Như Phương Lê, Hữu Tích Nguyễn, Ngọc Phước Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học Đại học Hạ Long, 2024

Mô tả vật lý: tr.103

Bộ sưu tập: Metadata

ID: 486211

Thêm vào giỏ

Luân trùng Brachionus plicatilis được xem là loại thức ăn sống quan trọng trong ương nuôi ấu trùng cá biển. Tuy nhiên, mỗi loài cá khác nhau yêu cầu mật độ luân trùng khác nhau trong quá trình ương nuôi. Nghiên cứu được tiến hành nhằm xác định mật độ luân trùng thích hợp lên sinh trưởng và tỉ lệ sống của cá song trân châu (cá song lai) giai đoạn ương từ cá bột đến 18 ngày tuổi với 4 nghiệm thức thức ăn có mật độ luân trùng lần lượt là 10, 15, 20 và 25 luân trùng/mL, mỗi nghiệm thức được lặp lại 3 lần. Thí nghiệm kết thúc khi ấu trùng cá bắt đầu ăn Artemia. Kết quả nghiên cứu cho thấy tốc độ tăng trưởng, tỉ lệ sống của cá song trân châu đạt cao nhất, tỉ lệ phân đàn và tỉ lệ dị hình thấp nhất khi ương từ giai đoạn cá bột lên 18 ngày tuổi với mật độ luân trùng là 20 luân trùng/mL.The rotifer Brachionus plicatilis plays a crucial role as live feed in the cultivation of marine fish larvae. Different fish species, however, require different densities of rotifers during rearing. A study was conducted to determine the optimal rotifer density for the growth and survival rate of the pearl grouper (hybrid grouper) larvae from the fry stage to 18 days old, with four feeding treatments of 4 densities of rotifer: 10, 15, 20 or 25 rotifers/mL. Each treatment was performed in triplicate. The experiment was terminated when the fish larvae began consuming Artemia. The results indicated that the growth and survival rate of the pearl grouper were highest, and the rate of deformities and coefficient of variation (CV) in body length were lowest when reared from the fry stage to the fingerling stage at 18 days old with a rotifer density of 20 individuals/mL.

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