Thay thế Aremia bằng thức ăn chế biến ương ấu trùng cua biển Scylla paramamosain

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Tác giả: Tâm Nguyên Lâm, Thị Thanh Hiền Trần

Ngôn ngữ: Vie

Ký hiệu phân loại:

Thông tin xuất bản: Khoa học (Đại học Cần Thơ) 2022

Mô tả vật lý: 251-258

Bộ sưu tập: Metadata

ID: 399021

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Nghiên cứu nhắm đánh giá khả năng thay thế Artemia bằng thức ăn chế biến (TACB) để ương ấu trùng cua biển Scylla paramamosain từ Zoe 3 lên cua 1. Nghiên cứu được thực hiện với 2 thí nghiệm: ương từ giai đoạn Zoe 3 lên megalop và từ megalop lên cua 1. Mỗi thí nghiệm gồm 6 nghiệm thức, được bố trí ngẫu nhiên với 5 lần lặp lại. Thí nghiệm được bố trí với chế độ cho ăn 5 lần/ngày cho tất cả các nghiệm thức, nghiệm thức đối chứng cho ăn hoàn toàn Artemia, nghiệm thức TACB cho ăn hoàn toàn thức ăn chế biến. Bốn nghiệm thức còn lại được thay thế từ 1- 4 lần Artemia bằng thức ăn chế biến, Kết quả tỷ lệ sống của zoae 5 và megalopa có khuynh hướng tăng dần theo tỷ lệ cho ăn Artemia, trung bình lần lượt là 30,8-91,1% và 8,6-17,0% trong đó nghiệm thức 3, 4 và 5 lần Artemia/ngày khác biệt không ý nghĩa thống kê. Tỷ lệ sống từ megalopa đến cua 1 dao động 57,6-76,8%, trong đó nghiệm thức hoàn toàn TACB đạt cao. Khi sử dụng thức ăn chế biến ương cua lượng Artemia giai đoạn Zoea3 đến megalopa giảm được 40% và giai đoạn megalopa đến cua 1 có thể giảm đến 100% lượng Artemia., Tóm tắt tiếng anh, The purpose of this study was to determine if it is possible to substitute Artemia by formulated feed (FF) in rearing the mub crab (Scylla paramamosain) larvae from zoea 3 to crab 1. Two experiments were carried out including (i) rearing from zoea 3 to megalopa stage and (ii) from megalopa to crab 1. Each experiment was designed with 6 treatments (5 replicates each) in which crab larvae were fed 5 times/day with different feeding of Artemia and FF including (i) only Artemia (5 times - control), (ii) 4 times of Artemia + 1 time of FF, (iii) 3 times of Artemia + 2 times of FF, (iv) 2 times of Artemia + 3 times of FF, (v) 1 time of Artemia + 4 times of FF and (vi) only FF (5 times). The results showed that survival rates of zoea 5 and megalopa tended to increase with the increased Artemia feeding times, averaging 30.8-91.1% and 8.6-17.0%, respectively, in which the treatment of 3, 4, and 5 feeding times of Artemia/day did not differ significantly. The survival rate from megalopa to crab 1 ranged from 57.6 to 76.8%, in which the formulated feed treatment was highest. Artemia can be reduced by 40% from zoea 3 to megalopa, and up to 100% from megalopa to crab 1 by the replacement of FF.

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