Affect of Stocking Densities to Growth and Survival rate of Freshwater Eel (Mastacembelus armatus) Fingerlings

  • Nguyễn Quang Đạt
  • Trần Đình Luân
  • Trần Anh Tuấn
  • Trương Tiến Hải

Abstract

A study on effects of stocking density on growth and survival rate of freshwater eels (Mastacembelus armatus) from 30 to 150 days old was conducted seperatelly in two stages. In experiment 1, fish were nursed up to 60 days old with three stocking densities (200, 400, 600 fish/m2, which were coded as MĐ1, MĐ2, MĐ3, respectively). In experiment 2, fish were continuoesly nursed from 60 to 150 days old with other three densities (50, 100, 150 fish/m2, which were coded as MĐ4, MĐ5, MĐ6, respectively). In the first experiment, MĐ1 showed the highest final harvest body weight
(1.56g) and survival rate (90.0%), followed by MĐ 2 with 1.41g of final body weight and 86.9% survival rate , and last by MĐ3 with 1.26g of harvest body weight and 83.3% survival rate (P<0.05). Therefore, a
stoking density of 200 fish/m2 (MĐ1) is recommended for this nursing period. In the second experiment, the harvest body weight and survival rate were 5.91g and 95.3% for MĐ4; 6.31g and 95.0% for MĐ5; and 5.44g and 87.8% for MĐ6, respectively. Of the densities, MĐ5 (100 fish/m2) was shown to be the better in terms of growth and survival rate in relation to nursing activities, and hence is resommended for this nursing period. To improve growth and survival of M. armatus from 30 to 150
days old, beside suitable feeding, stocking density should play an important role.

điểm /   đánh giá
Published
2015-05-04
Section
Bài viết