Effect of stocking density on growth performance, plankton abundance, body composition and haematological parameters of Etroplus suratensis (Bloch, 1790)

2021 ◽  
Author(s):  
Somnath R. Yadav ◽  
Balasaheb R. Chavan ◽  
Narinder Kumar Chadha ◽  
Suresh D. Naik ◽  
Kishore K. Krishnani ◽  
...  
Keyword(s):  
Body Composition ◽  
Growth Performance ◽  
Stocking Density ◽  
Haematological Parameters ◽  
Etroplus Suratensis

Effects of stocking density and presence or absence of soil base on growth, weight variation, survival and body composition of pearlspot,Etroplus suratensis(Bloch) fingerlings

2012 ◽  
Vol 44 (8) ◽  
pp. 1266-1276 ◽  
Author(s):  
Gouranga Biswas ◽  
Tapas K Ghoshal ◽  
Maruthamuthu Natarajan ◽  
Arunachalam R Thirunavukkarasu ◽  
Jitendra K Sundaray ◽  
...  
Keyword(s):  
Body Composition ◽  
Stocking Density ◽  
Soil Base ◽  
Weight Variation ◽  
Etroplus Suratensis

scholarly journals Performance of juvenile turbot (Scophthalmus maximus) fed varying dietary L-carnitine levels at different stocking densities

2010 ◽  
Vol 67 (2) ◽  
pp. 151-157 ◽  
Author(s):  
José Fernando Magalhães Gonçalves ◽  
Bruno Graziano da Silva Turini ◽  
Rodrigo Otávio de Almeida Ozório
Keyword(s):  
Body Composition ◽  
Growth Performance ◽  
Stocking Density ◽  
Ammonia Excretion ◽  
Scophthalmus Maximus ◽  
Production Costs ◽  
Growth Depression ◽  
Final Body Weight ◽  
Total Ammonia ◽  
Turbot Scophthalmus Maximus

Commercial farming of turbot (Scophthalmus maximus) at high stocking densities may lead to growth depression and increasing production costs. Moreover, the high levels of accumulated waste in an intensive system may cause rapid deterioration of water quality, which may undermine the production. L-carnitine is known as a growth-enhancer which shows promise as mitigator of crowding effects. The effects of stocking densities (4, 8, 11 and 14 kg m²) on growth performance, feed utilization and body composition were evaluated during 75 days on turbot (75.6 ± 2.8 g) fed two dietary L-carnitine levels (40 or 240 mg kg¹). At the end of the feeding trial, total ammonia excretion (TAN) was measured postprandially for 24h. Specific growth rate and weight gain decreased with increasing stocking density. Fish held at 4 kg m² had higher final body weight (94-96 g) than fish held at higher densities (80-87 g). Protein efficiency ratio was higher in fish held at 4 kg m² (1.33-1.36), in comparison to fish stocked at 8 kg m² (0.98) or 14 kg m² (0.45). Voluntary feed intake decreased from 0.70 to 0.56% BW with increasing stocking density. Dietary L-carnitine supplementation did not affect growth performance and body composition, except for body L-carnitine content which increased from 75 to 128 mg kg¹ BW with supplementation. Fish fed 240 mg L-carnitine supplements had lower TAN that the ones fed 40 mg L-carnitine (p < 0.05).

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