Results 171 to 180 of about 2,542 (212)
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Morphological Observation of Museum Specimens of Astacus astacus and Pontastacus leptodactylus
Freshwater Crayfish, 2022Abstract Both external and internal morphological characteristics (the gastric mill and the gill on maxillipeds) of museum specimens of European Astacidae, namely Astacus astacus and Pontastacus leptodactylus, were observed and detailed illustrations and descriptions are herein provided.
Tadashi Kawai, Jiří Patoka
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2020
Narrow-clawed crayfish Astacus leptodactylus (Eschscholtz, 1823) The distribution of narrow-clawed crayfish is mainly linked with the south-eastern region of the country and more rarely in the rest of Latvia (Bērziņš 1936, Mazītis 1955, 1967, 1971). Earlier evaluations of the distribution of this species have been quite inconsistent.
Aleksejevs, Ēriks, Birzaks, Jānis
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Narrow-clawed crayfish Astacus leptodactylus (Eschscholtz, 1823) The distribution of narrow-clawed crayfish is mainly linked with the south-eastern region of the country and more rarely in the rest of Latvia (Bērziņš 1936, Mazītis 1955, 1967, 1971). Earlier evaluations of the distribution of this species have been quite inconsistent.
Aleksejevs, Ēriks, Birzaks, Jānis
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Ontogeny of Osmoregulation in the CrayfishAstacus leptodactylus
Physiological and Biochemical Zoology, 2000Osmoregulation was studied during the postembryonic development of Astacus leptodactylus Eschscholtz 1823 in juvenile stages 1-8 and in adults. Juveniles hatch and later stages develop in freshwater or in moderately saline waters. The time of acclimation from freshwater to a saline medium increased from early juveniles to adults.
G N, Susanto, G, Charmantier
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Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1977
Abstract 1. 1. Composition of egg proteins of Astacus astacus and A. leptodactylus is compared by different methods. 2. 2. Disc electrophoresis reveals seven fractions in each case, four of them being identical in both species. 3. 3. By immunodiffusion (double diffusion test) three precipitin lines can be obtained, with one of them fusing.
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Abstract 1. 1. Composition of egg proteins of Astacus astacus and A. leptodactylus is compared by different methods. 2. 2. Disc electrophoresis reveals seven fractions in each case, four of them being identical in both species. 3. 3. By immunodiffusion (double diffusion test) three precipitin lines can be obtained, with one of them fusing.
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Crustaceana, 2011
AbstractThis study reports on the chromosome number and karyological characteristics of the endangered species of European crayfish, Astacus astacus and A. leptodactylus (Decapoda, Astacidae), both native to Croatian freshwater habitats. The karyotype of A. astacus and A. leptodactylus consists of 2n = 176 and 2n = 180 chromosomes, respectively.
Mlinarec, Jelena +5 more
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AbstractThis study reports on the chromosome number and karyological characteristics of the endangered species of European crayfish, Astacus astacus and A. leptodactylus (Decapoda, Astacidae), both native to Croatian freshwater habitats. The karyotype of A. astacus and A. leptodactylus consists of 2n = 176 and 2n = 180 chromosomes, respectively.
Mlinarec, Jelena +5 more
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2015
Recently, microsatellite markers have been successfully applied to reveal genetic patterns in populations of different European crayfish species. In this preliminary research, we used four microsatellites primarily aiming to check their possible usefulness in detecting hybrids between noble and narrow-clawed crayfish.
Štambuk, Anamaria +4 more
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Recently, microsatellite markers have been successfully applied to reveal genetic patterns in populations of different European crayfish species. In this preliminary research, we used four microsatellites primarily aiming to check their possible usefulness in detecting hybrids between noble and narrow-clawed crayfish.
Štambuk, Anamaria +4 more
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Physiological Response of the Crayfish, Astacus Leptodactylus to Saline Water
Crustaceana, 2004Crayfish can spend their whole life, including reproduction and development, in fresh water. It is considered that many advanced features, like direct development and maternal brood care, can be interpreted as adaptations to life in fresh water (Scholtz, 1995).
Koksal, G +2 more
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Genotoxicity monitoring of freshwater environments using caged crayfish (Astacus leptodactylus)
Chemosphere, 2012Genotoxicity of freshwater pollution was assessed by measuring DNA damage in haemocytes of caged freshwater crayfish Astacus leptodactylus by the means of Comet assay and micronucleus test, integrated with the measurements of physiological (total protein concentration) and immunological (total haemocyte count) haemolymph parameters as biomarkers of ...
Klobučar, Goran I.V. +7 more
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Morphological characteristics of Astacus Leptodactylus from Croatia
2008Narrowed-clawed crayfish (Astacus leptodactylus) is one of four native European freshwater crayfish inhabiting Croatian waters. Its presence was for the first time officially recorded relatively recently in the Sava River. Since then it was discovered in several rivers belonging to the Sava River basin, and in some rivers in the Drava-Danube basin.
Maguire, Ivana, Bušić, Goran
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High-throughput discrimination of bacteria isolated from Astacus astacus and Astacus leptodactylus
2013Bacterial diseases and pathogens of crayfish are common, widespread, and occasionally causing serious mortalities. In order to take rapid measures for correct treatment of crayfish diseases, the turnover time and accuracy in bacterial identification is an issue. Bacteria isolated from tissues of apparently healthy Astacus astacus and A.
Strunjak-Perović, Ivančica +8 more
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