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Phạm Cử Thiện(1), Trần Thị Thu Thủy

Thành phần loài ốc nước ngọt và tỉ lệ nhiễm sán lá song chủ trên ốc (giai đoạn cercariae) thu được trong ao nuôi cá thịt tai tượng ở tỉnh Tiền Giang

Freshwater snail diversity in growout ponds of giant gourami regarding intermediate hosts of trematode larvae (cercariae stage) in tien giang province

Tạp chí Khoa học - Đại học Sư phạm TP Hồ Chí Minh

2021

9

1649-1659

1859-3100

Nghiên cứu thành phần loài ốc nước ngọt và tỉ lệ nhiễm sán lá song chủ (giai đoạn cercariae) trên ốc trong ao nuôi cá thịt tai tượng ở huyện Châu Thành, tỉnh Tiền Giang được thực hiện vào tháng 10/2020 và tháng 4/2021. Tổng số 4548 mẫu từ 8 loài ốc, 8 giống, 4 họ đã được thu và phân loại dựa theo đặc điểm hình thái. Kết quả cho thấy, ốc Melanoides tuberculata bị nhiễm Xiphidio cercariae và Furcocercous cercariae trong khi ốc Bithynia sp. nhiễm Xiphidio cercariae và Parapleurolophocercous cercariae. Sáu loài ốc còn lại không nhiễm cercariae bao gồm Filopaludina sumatrensis, Pomacea sp., Sermyla tornatella, Sinotaia lithophaga, Tarebia granifera và Thiara scabra. Tỉ lệ ao nhiễm cercariae trong mùa khô cao hơn trong mùa mưa (P>0.05). Cần tiếp tục nghiên cứu dịch tễ học của sán lá song chủ trong ao nuôi cá tai tượng nhằm góp phần phát triển nuôi trồng thủy sản bền vững và an toàn vệ sinh thực phẩm.

Research on the composition of freshwater snails and trematode larvae (cercariae stage) in 20 grow-out ponds of giant gourami was carried out in Chau Thanh district, Tien Giang province in October 2020 and April 2021. A total of 4,548 samples of snails including 8 species, 8 genera, 4 families was collected and identified by the morphological method. The results showed that Melanoides tuberculata was infected Xiphidio cercariae and Furcocercous cercariae whereas Xiphidio cercariae and Parapleurolophocercous cercariae were recovered from Bithynia sp. No cercariae were found in Filopaludina sumatrensis, Pomacea sp., Sermyla tornatella, Sinotaia lithophaga, Tarebia granifera and Thiara scabra. The trematode pond prevalence (cercariae stage) in the dry season was higher than in the wet season (P>0.05). Further research on the epidemiology of trematodes in giant gourami cultured in ponds should be done to control the trematode infection in the cercariae stage to contribute to sustainable aquaculture development and food safety.

TTKHCNQG, CTv 138

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