Carbon sources affect water quality and haemato‐biochemical responses of Labeo rohita in zero‐water exchange biofloc system. (2nd July 2019)

• Record Type: Journal Article
• Authors: Ahmad, Irshad; Leya, Tasok; Saharan, Neelam; Asanaru Majeedkutty, Babitha Rani; Rathore, Gaurav; Gora, Adnan Hussain; Bhat, Irfan Ahmad; Verma, Ajit Kumar
• Is Part Of: Aquaculture research. Volume 50:Number 10(2019)
• Page Start: 2879
• Page End: 2887
• Publication Date: 2019-07-02
• Subjects: haematological responses -- Labeo rohita -- metabolic enzyme activity -- nitrogen dynamics -- organic carbon sources; Aquaculture -- Periodicals; Fishery management -- Periodicals; 639.8
• DOI: 10.1111/are.14241
• Languages: English
• ISSNs: 1355-557X

Abstract

Abstract: Biofloc technology degrades waste into useful resources exploiting microbes and can be used in zero‐water exchange systems. To study the effect of different biofloc systems on haematological and metabolic response of Labeo rohita fingerlings, a 60‐days experiment was conducted using four long lasting carbon sources. Seven hundred and fifty fingerlings having mean weight of 4.80 ± 0.12 g were randomly distributed into 15 tanks ( n = 50 per tank). Five experimental groups were set in triplicate; T1 (Tapioca), T2 (Wheat), T3 (Corn) T4 (Sugar bagasse) and control (clear water). In‐situ biofloc was developed in 300 L fibre‐reinforced plastic (FRP) tanks and a C/N ratio of 15 was maintained. Water quality variables indicated ammonia immobilization by heterotrophic bacteria, as the dominant mechanism for the removal of toxic‐nitrogenous compounds in the biofloc systems. Results exhibited significantly higher floc volume (53.33 ± 7.88 ml/L), haemoglobin content (6.61 ± 0.03 g/dl) and total leucocyte count (109.66 ± 0.06 thousand cells/mm 3 ) in tapioca biofloc system. Furthermore, the digestive and anti‐oxidative enzymes activities were also significantly higher in tapioca biofloc system. The lactate dehydrogenase and malate dehydrogenase enzyme assays showed a decreased level in tapioca biofloc system as compared with other biofloc systems and control group. Our observations indicate that tapioca biofloc system could improve the water quality, haematological and anti‐stress responses of L. rohita fingerlings in biofloc systems and thus can effectively replace other carbohydrate sources for the biofloc system.