Ảnh hưởng của nhiệt độ và độ mặn cao lên tiêu hao năng lượng qua bài tiết ammonia trên cá lóc (Channa striata)=Impacts of high temperature and salinity on ammonia (NH3-N) excretion in snakehead fish (Channa striata)

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Tác giả: Văn Tuân Phan, Thị Phương Lan Trần

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Công thương, 2024

Mô tả vật lý: tr.370-374

Bộ sưu tập: Metadata

ID: 244148

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Nghiên cứu ảnh hưởng của nhiệt độ và độ mặn cao lên bài tiết ammonia (NH3-N) của cá lóc (Channa striata) có kích cỡ từ 5-6 g
cá được bố trí trên các điều kiện nhiệt độ 28,31,34 (°C) kết hợp với độ mặn 0, 6, 9 (‰) (28°C-0‰ là đối chứng). Cá được cho ăn 1 lần/ngày trong 5 ngày đầu, bắt đầu ngày thứ 6 tiến hành thu mẫu nước. Kết quả phân tích cho thấy, hàm lượng NH3-N thải ra đạt giá trị cao nhất sau 12 giờ cho cá ăn và giá trị này sẽ ổn định sau 24 giờ. Hàm lượng NH3-N thải ra cao nhất ở 34°C-0‰ (0,085±0,014 mg/L), thấp nhất là 31°C-6‰ (0,033±0,008 mg/L) và giá trị này sẽ tăng lên khi độ mặn lên 28°C-9‰ (0,072±0,017 mg/L) khác biệt so với các nghiệm thức còn lại (p<
0,05). Giá trị năng lượng (ZE+UE) thải ra trên các nghiệm thức: 34°C-0‰
34°C-6‰ và 34°C-9‰ tương ứng là 12,75±2,81
6,32±1,12
9,83±2,96 (J/mg/N). Vậy, khi nhiệt độ và độ mặn tăng cao đều gia tăng quá trình bài tiết ammonia của cá lóc.This study analyzed the impact of high temperature and salinity on ammonia (NH3-N) excretion in snakehead fish (Channa striata) weighing 5-6 g. The fish were examined under different temperatures of 28, 31, and 34°C and salinity levels of 0, 6, and 9‰ (28°C-0‰ as the control sample). The fish were fed once a day for the first five days, and water samples were collected on the sixth day. The analysis results showed that the highest NH3-N excretion occurred 12 hours after feeding and stabilized after 24 hours. The highest NH3-N excretion was observed at 34°C-0‰ (0.085±0.014 mg/L), and the lowest was at 31°C-6‰ (0.033±0.008 mg/L). These values increased when the experimental conditions increased to 28°C-9‰ (0.072±0.017 mg/L), significantly different from the other treatments (p<
0.05). The energy value (ZE+UE) excreted in the treatments 34°C-0‰, 34°C-6‰, and 34°C-9 was 12.75±2.81
6.32+1.12
and 9.83±2.96 (J/mg/N), respectively. It can be seen that the increase in both temperature and salinity enhances the ammonia excretion process in snakehead fish.

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