نتایج جستجو برای: astacus leptodactylus
تعداد نتایج: 663 فیلتر نتایج به سال:
: heavy metals are chemical pollutants characterized by their toxicity, stability, bioaccumulation and biomagnification. they might accumulate in aquatic organisms, transfer through food chain and enter into human body. therefore, the study of their accumulation in the edible aquatic species has been a very important part of ecological and monitoring investigations. astacus leptodactylus is a b...
The noble crayfish ( Astacus astacus ), a keystone species of high ecological, economic, and cultural importance in Europe, is threatened due to long-term population decline caused by anthropogenic pressure on its habitats, the presence non-indigenous invasive climate change. Since effective protection remaining populations requires conservation measures based comprehensive knowledge species, i...
The present study examined the effects of different levels of plant protein (soybean meal) on biochemical parameters heamolymph of freshwater crayfish (Astacus leptodactylus). For this purpose, the effects of different levels of soybean meal protein including 0%, 30%, 50%, 70%, and 100% diet on some biochemical parameters and ion heamolymph of freshwater crayfish were evaluated after 60 days of...
A total of 394 (255 males,139 females) live freshwater crayfish Astacus leptodactylus from four stations of Aras reservoir in West Azarbaijan Province (North-Western Iran) were studied during the winter until early autumn of 2009 for the presence of parasites, Epibionts and Fungal agents. Parasitological surveys were carried out on gills exoskeleton and internal organs, mycological examinations...
Protozoan epibionts on Astacus leptodactylus (Eschscholtz, 1823) from Aras Reservoir, Northwest Iran
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...
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