Đăng nhập
 
Tìm kiếm nâng cao
 
Tên bài báo
Tác giả
Năm xuất bản
Tóm tắt
Lĩnh vực
Phân loại
Số tạp chí
 

Bản tin định kỳ
Báo cáo thường niên
Tạp chí khoa học ĐHCT
Tạp chí tiếng anh ĐHCT
Tạp chí trong nước
Tạp chí quốc tế
Kỷ yếu HN trong nước
Kỷ yếu HN quốc tế
Book chapter
Bài báo - Tạp chí
online (2020) Trang:
Tạp chí: Aquaculture

This study describes the prevalence of common diseases and pathogens of Pangasianodon hypophthalmus in nursing farms in the Mekong delta, Vietnam, and identifies the preventive husbandry measures in use by these farms and their association with diseases. In a first study, farmers of 63 randomly selected nursing farms in An Giang, Can Tho, and Dong Thap provinces were interviewed using semi-structured questionnaires. Questions included topics on disease occurrence and application of husbandry measures in their last crop. The results showed that prevalence of bacillary necrosis of pangasius (BNP) was 75%, motile Aeromonas septicemia (MAS) 60%, parasitic disease 48%, saprolegniasis 19%, pale gill and liver syndrome 17%, tail rot 14%, and swollen swim bladder disease 3%. Eighty-eight percent of farmers had more than one of these diseases in their last crop. The duration of these crops are on average 2 months. Delaying the onset of feed training was significantly preventive for MAS (OR = 0.85, 0.75–0.95 95% CI) and BNP (OR = 0.88, 0.78–0.97), using iodine to disinfect water for BNP (OR = 0.23, 0.05–0.95), draining the pond sludge for parasitic disease (OR = 0.32, 0.10–0.97) and reducing time between filling the pond with water and stocking of fish for parasitic disease (OR of increasing time was 2.49, 1.13–6.40). Of all farmers interviewed, 43% used antibiotics preventively in fish food, but this practice was not significantly associated with lower disease prevalence. In a second study, fish from 48 randomly selected nursing ponds were sampled. Samples were randomly split to diagnose parasites (n = 443), common bacteria (n = 48 pools), or common fungi (n = 371). Prevalences of some pathogens were high, i.e. the parasite Trichodina, 48%, the bacteria Aeromonas hydrophila, causative for MAS, 23%, the bacteria Edwardsiella ictaluri, causative for BNP, 40%, the fungi Fusarium spp., causative for swollen swim bladder disease, 9.7%, and the fungi Aspergillus spp. 9.4%. The high prevalence of some of these diseases and pathogens is concerning, and shows that current preventive and mitigation measures need to be improved. The high number of crops with multiple diseases may indicate a reduced general resilience of the fish, which indicates that mitigation strategies would benefit from a comprehensive approach, instead of focused on single diseases or pathogens. Current preventive husbandry practices needs optimizing, but can play an important role in future mitigation strategies towards improved sustainability of striped catfish nursing farms.

Các bài báo khác
Số Thủy sản 2014 (2014) Trang: 1-6
Tải về
Số 17a (2011) Trang: 1-8
Tải về
Số 36 (2015) Trang: 107-115
Tải về
Số 46 (2016) Trang: 111-117
Tải về
Số 35 (2014) Trang: 121-127
Tải về
Số 22c (2012) Trang: 129-135
Tải về
Số 32 (2014) Trang: 130-135
Tải về
Tập 56, Số CĐ Thủy sản (2020) Trang: 170-178
Tải về
Tập 54, Số CĐ Thủy sản (2018) Trang: 187-194
Tải về
Tập 56, Số 5 (2020) Trang: 192-200
Tải về
Số 25 (2013) Trang: 9-16
Tải về
(2011) Trang: 68
Tạp chí: The 9th Asian Fisheries and Aquaculture Forum, Shanghai-China, 21-25 April 2011
(2014) Trang: 218
Tạp chí: The 9th Symposium on Diseases in Asian Aquaculture, Hochiminh - Vietnam- 24-28 November, 2014
(2014) Trang: 63
Tạp chí: AQUACULTURE AND ENVIRONMENT: A focus in the Mekong Delta, Viet Nam, April 3-5, 2014, Can Thi University, Can Tho city, Viet Nam
 


Vietnamese | English






 
 
Vui lòng chờ...