Results 131 to 140 of about 231 (156)
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A Key to Genera, Species and Subspecies of Astacinae (Nephropsidea: Astacidae)
International Review of Hydrobiology, 1967exaly +2 more sources
2023
The observations of crawfish behaviour were carried out in artificial water bodies with varying existence conditions. Migration of the western-palearctic Astacidae species to fresh waters in the Ancient Old Pontian Black sea epoch is substantiated. The immigration theory of the Caspian fauna origin (including Astacidae) in the Pontoazovian area is ...
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The observations of crawfish behaviour were carried out in artificial water bodies with varying existence conditions. Migration of the western-palearctic Astacidae species to fresh waters in the Ancient Old Pontian Black sea epoch is substantiated. The immigration theory of the Caspian fauna origin (including Astacidae) in the Pontoazovian area is ...
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The Occurrence and Distribution of Pteridines and Purines in Crayfish (Decapoda, Astacidae)
Crustaceana, 1972[Die Gewebe und Organe von neun Flusskrebs-Arten - Cambarus bartoni, C. diogenes, C. fodiens, C. robustus, Orconectes immunis, O. obscurus, O. propinquus, O. rusticus und O. virilis - aus Zentral- und Sud-Ontario (Kanada), wurden (Dunnschichtchromatographie auf Zellulose Platten) auf Pteridinen untersucht.
E.B. Waywell, S. Corey
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Development Genes and Evolution, 2006
The early development of the parthenogenetic Marmorkrebs (marbled crayfish) is described with respect to external morphology, cell lineage, and segment formation. Due to its parthenogenetic reproduction mode, the question arises whether or not the marbled crayfish is a suitable model organism for developmental approaches.
Frederike, Alwes, Gerhard, Scholtz
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The early development of the parthenogenetic Marmorkrebs (marbled crayfish) is described with respect to external morphology, cell lineage, and segment formation. Due to its parthenogenetic reproduction mode, the question arises whether or not the marbled crayfish is a suitable model organism for developmental approaches.
Frederike, Alwes, Gerhard, Scholtz
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Ein Beitrag Zur Systematik Der Astacidae (Decapoda)
Crustaceana, 1962[Une etude taxonomique des ecrevisses (Astacidae) europeennes, plus particulierement de ses representants balkaniqwes, est presentee, basee sur l'examen de plus de 300 exemplaires de diverses localites. Les genres et sous-genres sont discutes et les especes, sous-especes et categories systematiques au dessous du niveau subspecifique sont mises en cle ...
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2023
In distribution of crayfishes of Astacus, Cambaroides and Austropotamobius genera the same peculiarity is observed which was observed in distribution of Astacus (Pontastacus) leptodactylus the combined dwelling in the same water body of some taxons.
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In distribution of crayfishes of Astacus, Cambaroides and Austropotamobius genera the same peculiarity is observed which was observed in distribution of Astacus (Pontastacus) leptodactylus the combined dwelling in the same water body of some taxons.
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The Hatchling Setae of Austropotamobius Pallipes (Lereboullet) (Decapoda, Astacidae)
Crustaceana, 1973Der genaue Befruchtungsort und die genaue Befruchtungszeit des Austropotamobius pallipes sind nicht bekannt; befruchtete Eier schlupfen in der zweiten Juniwoche aus. Der frischgeschlupfte Krebs hat in diesem ersten Stadium fast noch keine Haare; aber die Position der zukunftigen Haare ist durch Auswuchse auf der Schale angedeutet. Die Antennen haben im
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Porodica Astacidae u sjeverozapadnoj Hrvatskoj
2002Račja kuga, zagađenje, nekontrolirani izlov, promjena staništa i unos kompetitivnih alohtonih vrsta uzrokovali su prorijeđenje ili nestanak autohtonih vrsta rakova porodice Astacidaea iz mnogih europskih i naših voda pa su to danas vrlo ugrožene vrste. U Hrvatskoj su zaštićene Zakonom o zaštiti prirode, ali nažalost ne i dovoljno istražene.
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COMPARATION OF MORPHOMETRY BETWEEN CROATIAN AND AUSTRIAN ASTACIDAE POPULATIONS
2008The morphometric characteristics of an animal reflect both genetic variation and adaptation to the environment and can be used for the distinction of populations. Therefore, twenty-one morphometric parameters were measured on five populations of the stone crayfish, Austropotamobius torrentium and on four populations of the noble crayfish, Astacus ...
Maguire, Ivana +2 more
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Karyological analysis of three Astacidae species : a preliminary report
2008This is a preliminary report on the karyotype analysis of three freshwater crayfish species (Astacus astacus, A. leptodactylus and Austropotamobius torrentium) belonging to family Astacidae, all native to Croatian freshwater habitats. Chromosome number and heterochromatin distribution was studied on metaphase spreads of mitotic and meiotic cells of ...
Pavlica, Mirjana +5 more
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