An Initial Study on Artificial Reproduction of Pond Loach (Misgurnus anguillicaudatus Cantor, 1842)

  • Bùi Huy Cộng
  • Ngô Thị Dịu
  • Nguyễn Thị Diệu Phương

Abstract

An initial study on artificial reproduction of pond loach (Misgurnus anguillicaudatus Cantor, 1842) was conducted in order to determine main affecting factors including breeding season, breeding rate and use of hormones. Pond loach broodstock at a size of 8-15 g/fish, were fattened at a stocking density of 20 fish/ m2 in cement tanks (30 m2/tank, 1.5m in depth), and fed on 28-35% protein pellet feed. Water flow was 1-2 hours/week for stimulating reproduction. The breeding season started from April and ended in October. the mature rate was highl in June, July and August. Hypophysis extract was injected to stimulate reproduction in pond loach at 7 mg/kg for females and applied 1/3 such a dose for males. Results showed that 100% females bred with a fertilization rate iof 70% and a hatching rate of 60%. The fry of pond loach were kept in cement tanks and fed on plankton and egg yolk. Fish of 1.5-2 cm in length were tranfered to nets until they reached 4-5cm in length. The fingerlings were fed plankton and pellets with 35-40% protein.
In the years of 2009 and 2010, by artifical reproduction 3000 fingerlings with a size of 2-3g/fish were produced. The present research results contributes new knowledge of seedstock production, nursing and conservation of pond loach.

điểm /   đánh giá
Published
2015-04-09
Section
Bài viết