ẢNH HƯỞNG CỦA TẦN SUẤT CHO ĂN LÊN SINH TRƯỞNG, TỶ LỆ SỐNG VÀ HIỆU QUẢ SỬ DỤNG THỨC ĂN CỦA CÁ KHOANG CỔ CAM (Amphiprion percula Lacepède, 1802)

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Tác giả: Tấn Sỹ Nguyễn, Thị Lê Nghi Nguyễn, Thị Lê Trang Trần, Văn Dũng Trần

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Thái Nguyên, 2023

Mô tả vật lý: tr.254-262

Bộ sưu tập: Metadata

ID: 339676

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Nghiên cứu được thực hiện nhằm đánh giá ảnh hưởng của tần suất cho ăn lên sinh trưởng, tỷ lệ sống và hiệu quả sử dụng thức ăn của cá khoang cổ cam. Năm tần suất cho ăn được thử nghiệm gồm 2 lần, 4 lần, 6 lần, 8 lần và 10 lần/ngày. Cá khoang cổ cam giống (0,86 g, 3,45 cm) được nuôi với mật độ 15 con/bể (65 lít/bể). Các nghiệm thức được thực hiện với ba lần lặp trong thời gian 8 tuần. Kết quả nghiên cứu cho thấy tần suất cho ăn ảnh hưởng đáng kể đến các chỉ tiêu tăng trưởng của cá. Cá được cho ăn 6 lần/ngày đạt các chỉ tiêu tăng trưởng về chiều dài, khối lượng cao nhất, tiếp theo là 8 và 10 lần, và thấp nhất ở nghiệm thức 2 và 4 lần/ngày (P <
0,05). Tuy nhiên, tần suất cho ăn không ảnh hưởng đến hệ số phân đàn (CVL, W), hệ số điều kiện (CF) và tỷ lệ sống (SR) giữa các nghiệm thức (P >
0,05). Hiệu quả sử dụng thức ăn (FCR, FER và PER) cũng đạt được tối ưu ở chế độ cho ăn 6 lần/ngày (P <
0,05). Từ nghiên cứu này có thể nhận thấy, cá khoang cổ cam giống nên được cho ăn 6 lần/ngày nhằm đạt được các chỉ tiêu tăng trưởng và hiệu quả sử dụng thức ăn tối ưu.This study was conducted to evaluate the effect of feeding frequency on growth, survival and feed utilization of orange clownfish. Five feeding frequencies were tested including 2 times, 4 times, 6 times, 8 times and 10 times/day. Orange clownfish fingerlings (0.86 g, 3.45 cm) were reared at a density of 15 fish/tank (65 liters/tank). All treatments were performed with three replicates over a period of 8 weeks. Results showed that feeding frequency significantly affected the growth parameters of fish. Fish fed 6 times/day achieved the highest growth in total length and body weight, followed by 8 and 10 times/day, and the lowest growth was found in the treatment of 2 and 4 times/day (P <
0.05). However, the feeding frequency did not affect the coefficient variance (CVL, W), condition factor (CF), and survival rate (SR) among the treatments (P >
0.05). Feed utilization (FCR, FER and PER) was also optimally achieved at the feeding frequency of 6 times/day (P <
0.05). From this study, it can be seen that orange clownfish fingerlings should be fed 6 times/day to attain optimal growth and feed efficiency.

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