abstract experiment was conducted for 8 weeks to determine the reaction (astacus leptodactylus) to interaction energy and salinity. diets containing 3 levels of energy (300,370 and 450 kcal/100g) with a constant protein content of 30% and 2 levels of salinity (fresh water and brackish water (12 ppt) were formulated. tank content 110 liter, each filled with 80 liter water. 5 a.leptodactylus (ave...

A total of 107 leptodactylid frogs representing 6 species, Leptodactylus fuscus (n 5 15), Leptodactylus leptodactyloides (n 5 9), Leptodactylus mystaceus (n 5 2), Leptodactylus ocellatus (n 5 31), Leptodactylus petersii (n 5 31), and Leptodactylus pustulatus (n 5 19), collected in the Brazilian state of Tocantins, were examined for helminths. One species of Digenea (Catadiscus marinholutzi), 6 ...

The genetic variation and population structure of narrow-clawed crayfish (Astacus leptodactylus) was examined by means of polymerase chain reaction (PC R) restriction fragment length polymorphism (RF LP) analysis of the cytochrome oxidase subunit I (COI) of mitochondrial DNA. A total of 194 adult specimens were collected from seven sample sites including, two in the south Caspian Sea and one ea...

The crustacean hyperglycemic hormone is the most abundant neuropeptide present in the eyestalk of Crustacea and its main role is to control the glucose level in the hemolymph. Our study was aimed at assessing the importance of C-terminal amidation for its biological activity. Two recombinant peptides were produced, Asl-rcHH-Gly with a free carboxyl terminus and Asl-rcHH-amide with an amidated C...

The freshwater crayfish of the Aras Reservoir is an important economic fisheries resource of West Azarbaijan, Iran. This study was conducted to evaluate the prevalence of parasitic infestation of Crayfish seasonally in this area in 2010. Among 390 different sizes of Astacus leptodactylus which were examined,  a range of ectocommensals or ectosymbionts from a number of different phyla including ...