Sub-lethal impact of carbaryl on food utilization in the freshwater prawn Macrobrachium malcolmsonii

This study determines the toxic effect of carbaryl (Sevin50% W.P) on the food utilization parameters in intermoult juveniles of the prawn, Macrobrachium malcolmsonii. The prawns (4.5-5.0 cm in length and 1.0-1.25 g wet wt.) were exposed to three sub-lethal concentrations of carbaryl (5.15, 7.73 and...

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Bibliographic Details
Published in:Journal of environmental biology 2011-05, Vol.32 (3), p.369-373
Main Authors: Bhavan, P Saravana, Geraldine, P, Sowdeswari, R
Format: Article
Language:English
Subjects:
Absorption
Ammonia
Animals
Bioenergetics
Carbaryl
Carbaryl - toxicity
Dose-Response Relationship, Drug
Energy
Environmental science
Excretion
Feeding Behavior - drug effects
Feeding rates
Food
Freshwater
Insecticides - toxicity
Macrobrachium malcolmsonii
Palaemonidae - drug effects
Palaemonidae - physiology
Water Pollutants, Chemical - toxicity
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Summary:This study determines the toxic effect of carbaryl (Sevin50% W.P) on the food utilization parameters in intermoult juveniles of the prawn, Macrobrachium malcolmsonii. The prawns (4.5-5.0 cm in length and 1.0-1.25 g wet wt.) were exposed to three sub-lethal concentrations of carbaryl (5.15, 7.73 and 15.47 microgl-1) for duration of 40 days. The toxic medium was renewed daily. The prawns were fed ad libitum with known energy quantity of boiled goat liver on daily basis. The overall wet weight gain was calculated. The energy lost through unconsumed food (15-60%), faeces (15-109%), ammonia excretion (9-27%) and moults (13-26%) of the prawns were calculated. The feeding rate, the rate and efficiency of absorption, the metabolic and food conversion rates and the gross and net food conversions efficiencies were found to be significantly declined (p
ISSN:0254-8704
2394-0379