Levels of phenoloxidase (Po), trypsin and lysozyme activities were determined following 48 hours exposing freshwater crayfish (Pontastacus leptodactylus) weighing 59.8±3.4g to different low pH values of 6.5, 5.5, 4 and 2.5 at 20-23˚C. Significant decrease were found (p

One of the most critical challenges in species distribution modelling is testing and validating various digitally derived environmental predictors (e.g., remote-sensing variables, topographic variables) by field data. Therefore, here we aimed to explore value soil properties spatial four European indigenous crayfish species. A database with 473 presence absence locations Romania for Austropotam...

In this study, the effect of some biotic (total length, sex) and abiotic (sampling station month) factors on shell status (soft or hard) Pontastacus leptodactylus were investigated in a natural crayfish population. The study was carried out Hirfanl? Dam Lake (Central Anatolia), where one most important harvesting areas Turkey, with monthly basis between Jun-2017 May-2018. Permutational multivar...

Pre-larvae hatching fecundity and ovarian of narrow-clawed crayfish populations were estimated in the lakes reservoirs Belarus. Statistically significant differences females from various water bodies noted only for Lake Kichino. For all other bodies, dependence on length did not differ statistically was described by one equation. The greatest loss eggs during spawning period (oviposition), inse...

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...

In this study, it is aimed to compare the yield and strength of crayfish fyke rigged with knotless net 210d/12 rope thickness those traditional material 210d/6 knotted which widely used in Turkey fishing (Pontastacus leptodactylus, Eschscholtz, 1823). The study was carried out on a monthly basis between June 2017 May 2018. total 300 nets, equipped 150 classical alternative were used. caught cra...

The crustacean Hyperglycemic Hormone (cHH) is a neuropeptide present in many decapods. Two different chiral isomers are simultaneously present in Astacid crayfish and their specific biological functions are still poorly understood. The present study is aimed at better understanding the potentially different effect of each of the isomers on the hepatopancreatic gene expression profile in the cra...

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...