The Reproductive Biology ofDactylogyrus sp. (Monogenea: Dactylogyridae) Infecting Grasscarp

Received: 24-09-2013

Accepted: 12-11-2013

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Issue: Vol. 11 No. 7 (2013)

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CHĂN NUÔI – THÚ Y – THỦY SẢN

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Hoai, T., Hau, N., & Van, K. (2024). The Reproductive Biology ofDactylogyrus sp. (Monogenea: Dactylogyridae) Infecting Grasscarp. Vietnam Journal of Agricultural Sciences, 11(7), 957–964. http://testtapchi.vnua.edu.vn/index.php/vjasvn/article/view/1654

The Reproductive Biology ofDactylogyrus sp. (Monogenea: Dactylogyridae) Infecting Grasscarp

Truong Dinh Hoai (*) 1 , Nguyen Thi Hau 1 , Kim Van Van 1

  • 1 Khoa Chăn nuôi và Nuôi trồng thủy sản, Trường Đại học Nông nghiệp Hà Nội

    • Keywords

    Dactylogyrus, reproductive biology, Grass carp

    Abstract


    Dactylogyrus sp., a common external parasite frequently occurs with high percentage and intensity of infection in fresh water fish. The infection of this prasite causes great influence on the growth and production of many freshwater fish, especially grasscarp (Ctenopharyngodon idella) at fry and fingerling stage. The study was carried out on 180 fry grasscarp, 363 mature Dactylogyrus sp. and 1813 eggs of Monogenea to investigate major features of the reproductive biology of this parasite. The results showed that the maturation time of the eggs from being laid to hatching to oncommiracidia was 4.65 ±0.27days. This parasite reaches sexual maturity and completes their life cycle in 11.4 ± 0.24 days. Egg production increased gradually over time, rising from 2.75 ± 0.17 to 8.08± 0.53 eggs/h from day 1 to day 5.. At night time, the rate of laying and egg production was 1.7 to 2 and 1.6 to 2.1 times, respectively, higher than those at day time. This study is the first instance that the reproductive biology of Dactylogyrus sp. infecting grasscarp was examined in Vietnam.

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