Stocking density in the larviculture of Nile tilapia in saline water

Revista Brasileira de Zootecnia

Alvarenga, Érika Ramos de¹  Rodrigues, Lucas Alves¹  Silva, Walisson de Souza e¹  Takata, Rodrigo¹  Turra, Eduardo Maldonado¹  Luz, Ronald Kennedy¹  Melillo Filho, Reinaldo¹  Santos, André Eduardo Heringer¹ 

[1] Universidade Federal de Minas Gerais, Belo Horizonte, Brazil

关键词: intensive larviculture;    Oreochromis niloticus;    water quality;    water salinity    Introduction Stocking density is one of the factors that could potentially affect fish survival (Houde;    1977) and production performance (Hecht & Uys;    1997;    Irwin et al;   

DOI  :  10.1590/S1516-35982012001200001

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

The objective of this study was to assess the possibility of increasing the stocking density in the larviculture of Nile tilapia, Oreochromis niloticus, in saline water. Six-day post-hatched larvae (average weight of 0.09±0.002 g), at the start of the exogenous feeding, were stocked in twelve 8 L tanks at densities of 1, 10, 20 and 30 larvae/L. The larvae were fed a diet consisting of 40% crude protein five times per day. During larviculture, water was kept at a salinity of 2 g of common salt/L. At the end of the 28-day experiment, the survival rate, length, weight, temperature, water salinity and conductivity were not affected by the different treatments. The dissolved oxygen and pH, however, decreased as density increased, whereas total ammonia concentration, turbidity and biomass showed a direct relationship with the increase of stocking density. Consequently, the present study shows for the first time that the larviculture of Nile tilapia is possible with up to 30 larvae/L in water with 2 g of salt/L.

【 授权许可】

CC BY-NC