author(s)
Surnar Sharad Raosaheb, ML Ojha, Thongam Ibemcha Chanu, VP Saini and Arun Sharma

abstract
The present investigation was carried out to standardize the water depth for better survival of Clarias magur larvae in both first tier and second tier system. The experiment consisted of three water depth viz; (6 cm – T₁, 8 cm – T₂ and 10 cm – T₃) in triplicates and rear up to 10 dph. The second tier experiment was conducted with three water depth Viz: T₁ (6''), T₂ (7'') and T₃ (8''). The first tier rearing system showed the non-significant difference (P>0.05) between the treatments in terms of body length. However, the body weight gain was significant between T₃ and both T₁ and T₂. The second tier system showed growth and Survival was observed significant difference (p<0.05) among the treatment. Low water depth 6 cm in first tier rearing system and water depth of 06'' showed better growth and higher survival percentage especially for Clarias magur larval rearing in second tier rearing unit. It is obvious from the study that the water depth affected the survival rate of magur larvae rearing.