Ảnh hưởng của chlorine lên một số chỉ tiêu huyết học của cá rô phi (oreochromis niloticus)

TRƯỜNG ĐẠI HỌC CẦN THƠ KHOA THỦY SẢN VÕ DUY PHÚC ẢNH HƯỞNG CỦA CHLORINE LÊN MỘT SỐ CHỈ TIÊU HUYẾT HỌC CỦA CÁ RÔ PHI (Oreochromis niloticus) LUẬN VĂN TỐT NGHIỆP ĐẠI HỌC NGÀNH NUÔI TRỒNG THỦY SẢN 2010 LỜI CẢM TẠ Em xin chân thành ghi ơn cô PGs.Ts Đỗ Thị Thanh Hương giảng viên hướng dẫn ñã tận tình truyền ñạt, dạy bảo hướng dẫn em suốt trình thực luận văn Chân thành cám ơn! Tồn thể thầy Khoa thủy sản, đặc biệt thầy anh chị Bộ mơn Dinh dưỡng chế biến thủy sản quan tâm tạo ñiều kiện tốt cho em hồn thành luận văn thời gian Cảm ơn chị Nguyễn Thị Kim Hà, Nguyễn Văn Toàn bạn làm việc nhiệt tình giúp đỡ tơi suốt trình làm luận văn Xin chân thành cám ơn! TĨM TẮT Chlorine hóa chất xử lý nước ñược sử dụng rộng rãi nuôi trồng thủy sản Tuy nhiên sử dụng không hợp lý gây lãng phí nguy hiểm đến sức khỏe cá, tơm Do đó, mục đích nghiên cứu xác ñịnh ảnh hưởng chlorine lên thay ñổi số tiêu sinh lý máu cá rô phi ñánh giá mức ñộ tồn lưu ñể từ có biện pháp sử dụng an tồn hợp lý Thí nghiệm đánh giá mức độ ảnh hưởng chlorine lên biến ñổi số tiêu sinh lý máu bố trí mức nồng ñộ chlorine (0; 0,03; 0,28; 0,35 mg Cl/L) qua lần thu mẫu (1, 6, 24, 48, 72, 96 giờ) thu ñược kết số lượng hồng cầu, hàm lượng hemoglobin, tỷ lệ huyết cầu máu cá giảm số lượng bạch cầu, thể tích hồng cầu, tỷ lệ methemoglobin máu tăng cao theo nồng ñộ chlorine xử lý, tiêu ñều hồi phục sau 72 Nồng ñộ xử lý chlorine cao, cường độ hơ hấp cá giảm nhiên nồng độ chlorine LC50 cường độ hơ hấp cá lại tăng khác biệt khơng có ý nghĩa thống kê 0Ө& /Ө& 7UDQJ L LL LLL LY Y /Ӡ, &Ҧ0 7Ҥ 7Ï0 7Ҳ7 '$1+ 6È&+ %Ҧ1* '$1+ 6È&+ +Ỵ1+ '$1+ 0Ө& 9,ӂ7 7Ҳ7 &+ѬѪ1* *,Ӟ, 7+,ӊ8 &+ѬѪ1* /ѬӦ& +Ҧ2 7¬, /,ӊ8 6ѫ OѭӧF YӅ Fi 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