Turkish Journal of Fisheries and Aquatic Sciences
2012, Vol 12, Num, 2 (Pages: 233-238)
Use of Dietary Pelargonium sidoides Extract to Improve Growth and Body Composition of Narrow-Clawed Crayfish Astacus leptodactylus Eschscholtz, 1823 Juveniles
Funda Turan 1 ,Yavuz Mazlum 1 ,Yasemin Bircan Yıldırım 1 ,Armağan Gezer 1
1 Mustafa Kemal University, Faculty of Fisheries and Aquaculture 31200 Iskenderun, Hatay
DOI :
10.4194/1303-2712-v12_2_06
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The effects of the Pelargonium sidoides extract on survival, growth, and body composition of juvenile freshwater
crayfish (Astacus leptodactylus) were investigated. Newly hatched third instars of A. leptodactylus were fed with experimental
diets prepared by using supplementation of P. sidoides extract (0, 0.5, 1 and 2 ml 100 g-1) for 105 days. Growth rate was
increased significantly in crayfish fed with 2 ml P. sidoides extract 100 g-1 diet in comparison to the control groups (P<0.05).
Feed conversion ratio, protein efficiency ratio and apparent net protein utilization were also significantly improved in group
fed diet with 2 ml 100 g-1 P. sidoides extract than that with control and the other groups. After 105 days of rearing the survival
rate was found highest in 2 ml P. sidoides extract 100 g-1 diet supplemented group (80.0%). Protein content (16.5%) of the 2
ml 100 g-1 P. sidoides extract-supplemented group was significantly higher than the control and other dietary groups (P<0.05).
The lipid contents were decreased in P. sidoides extract-supplementation. These results indicated that the P. sidoides extract is
useful to improve growth, feed utilization and survival rate in freshwater crayfish, juvenile diets.
Keywords :
Pelargonium sidoides, crayfish, Astacus leptodactylus, growth performance