ẢNH HƯỞNG CỦA ION CHÌ (Pb2+) LÊN TỈ LỆ SỐNG VÀ DỊ TẬT XƯƠNG SỐNG CỦA ẤU TRÙNG CÁ SÓC Oryzias curvinotus GIAI ĐOẠN 1-10 NGÀY TUỔI = THE EFFECT OF LEAD ION ON THE GROWTH AND SURVIVAL RATE OF Oryzias curvinotus FROM STAGE 1 TO 10 DAYS OLD

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Tác giả: Dung Trần Thị Phương

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học - Trường Đại học Sư phạm TP Hồ Chí Minh, 2020

Mô tả vật lý: tr.527

Bộ sưu tập: NCBI

ID: 551412

Thêm vào giỏ

Ion chì là một trong những cation có tác động lên sức sống, khả năng sinh trưởng, dị tật về xương sống trong quá trình sống của cá. Nghiên cứu được tiến hành nhằm đánh giá tác động của ion chì (Pb2+) ở các nồng độ 0 µg/L
50 µg/L
100 µg/L
150 µg/L lên quá trình phát triển cá Sóc giai đoạn ấu trùng sau nở từ 1-10 ngày tuổi. Kết quả cho thấy: (i) ở các nồng độ Pb2+ được kiểm tra khác nhau, nồng độ tối thiểu Pb2+ ảnh hưởng đến tỉ lệ sống của cá Sóc là 50 µg/L
(ii) ở mọi nồng độ được kiểm tra Pb2+, tỉ lệ sống của cá bị ảnh hưởng nhiều nhất vào ngày thứ 5 tại nồng độ 150 µg/L. Dựa vào kết quả thu được, chúng tôi thiết lập một phương trình để dự đoán tỉ lệ sống của ấu trùng cá và tìm được nồng độ LD50 Pb2+ gây chết cá ấu trùng sau 10 ngày nuôi là 98 µg/L và LT50 của Pb2+ ở nồng độ 150 µg/L là 9,76 ngày. Kết quả nghiên cứu cho thấy, nồng độ Pb2+ càng cao càng làm giảm tỉ lệ sống của cá, tăng dị tật xương sống cá ấu trùng và ảnh hưởng cao nhất tại nồng độ 150 µg/L. Lead ion is one of the cations that affects the vitality, growth ability, causing skeletal deformities in fish development. This study was conducted to evaluate the effect of lead ion (Pb2+) on 1 to 10-day-old Oryzias curvinotus larvae at different concentrations: 0 µg/L
50 µg/L
100 µg/L
150 µg/L. The results revealed that: (i) the minimum Pb2+ concentration affecting the medak survival rate is 50 µg/L
(ii) the Pb2+ concentration significantly affecting the survival rate on the 5th day is 150 µg/L. Based on the obtained results, we offered an equation to predict the survival rate of fish larvae and discovered the lethal LD50 concentration of Pb2+ after 10 days culturing is 98 µg/L and LT50 of Pb2+ at the concentration of 150 µg/L is 9,76 days. In conclusion, the higher concentration of Pb2+ causes the lower survival rate and the higher skeletal deformities of Oryzias curvinotus
the most effective concentration is 150 µg/L.

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