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Turkish Journal of Fisheries and Aquatic Sciences 2010, Vol 10, Num, 3     (Pages: 403-410)

Effects of Eyestalk Ablations on Growth and Ovarian Maturation of the Freshwater Prawn Macrobrachium lanchesteri (de Man)

K.N. Varalakshmi 1 ,Ravichandra Reddy 1

1 Shri Bhagawan Mahaveer Jain College, Centre for Post-Graduate Studies, Department of Biotechnology, 18/3, 9th Main, III Block, Jayanagar, 560 011, Bangalore, India DOI : 10.4194/trjfas.2010.0314 Viewed : 2505 - Downloaded : 3500 The effects of unilateral and bilateral eyestalk ablations on growth, ovarian maturation, carbohydrate, protein and energy contents were investigated in Macrobrachium lanchesteri (de Man). Daily growth as well as ovarian maturation were accelerated by eyestalk ablation in these prawns. The mortality in ablated prawns was more than that of intact ones. The biochemical components like carbohydrate and protein were altered by eyestalk ablations. The energy content of the different tissues were also showing some variations due to the absence of eyestalk hormones. Eyestalk ablation, especially unilateral eyestalk ablation could be used for inducing rapid growth and spawning in this particular species of freshwater prawns. Keywords : Eyestalk ablation, ovarian maturation, ovarian index, growth, energy content