The effects of galactooligosaccharide (GOS) and varying levels Lactobacillus plantarum (LP) on some physiological parameters as well air exposure stress resistance in clawed crayfish (Pontastacus leptodactylus) were investigated. During a 97-day trial, 216 fed with four experimental diets (in triplicates) including the control diet (without GOS LP), GLP7 (GOS 2%+LP 107 CFU.g-1 diet), GLP8 108 G...

The Astacus leptodactylus specimens were collected from four sites of Aras reservoir, North-West of Iran and examined for the epibionts during 2009. Protozoan epibionts from ciliophora (one genus and seven species) and tracheophyta were isolated from the cuticular surface of different body parts of narrow-claw crayfish, A.leptodactylus. Seasonal prevalence of infestation was determined in 394 i...