Relevant bibliographies by topics / Astacus leptodactylus

Academic literature on the topic 'Astacus leptodactylus'

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Published: 11 March 2023

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Journal articles on the topic "Astacus leptodactylus"

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Pavlica, M., M. Mcžić, G. Klobučar, M. Šrut, I. Maguire, and J. Mlinarec. "Comparative Karyotype Investigations in the European Crayfish Astacus astacus and A. leptodactylus (Decapoda, Astacidae)." Crustaceana 84, no. 12-13 (2011): 1497–510. http://dx.doi.org/10.1163/156854011x607015.

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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. The haploid chromosome complement of A. astacus consists of 52 metacentric, 35 metacentric-submetacentric, and 1 acrocentric chromosomes. Fluorochrome staining with 4,6-diamino-2-phenylindole (DAPI) has revealed that the karyotypes of A. astacus and A. leptodactylus are characterized by large heterochromatic blocks located at centromeric and intercalary positions on the chromosomes. Interstitial heterochromatic blocks were more frequent in A. astacus than in A. leptodactylus. In both species pairing of chromosomes in meiosis was regular with the majority of bivalents in a ring- and a dumbbell-form. Fluorescence in situ hybridization (FISH) has revealed that two 45S rDNA loci were present in the investigated species. In A. astacus one of the two 45S rDNA-bearing chromosome pairs was highly heteromorphic, exhibiting a three-fold size difference between 45S rDNA sites on homologous chromosomes. Such a size difference was significantly less pronounced in A. leptodactylus. The karyotype differences between A. astacus and A. leptodactylus suggest changes in chromosome number as well as position of repetitive DNAs have played a role in the karyotype evolution of the species of Astacus.
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Kostyuk, Vitaliy, Sergey Mezhzherin, and Alexander Garbar. "Генетична диференціація річкових раків із водойм басейну р. Прип'ять." Lesya Ukrainka Eastern European National University Scientific Bulletin. Series: Biological Sciences, no. 13(362) (July 11, 2018): 121–26. http://dx.doi.org/10.29038/2617-4723-2017-362-13-121-126.

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На основі проведених досліджень алозимної мінливості доведено наявність у водоймах басейну річки Прип’ять трьох видів річкових раків: A. astacus, A. angulosus та A. leptodactylus. Установлено, що вид A. astacus генетично більш диференційований від довгопалих раків, ніж A. angulosus й A. leptodactylus між собою.
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Kawai, Tadashi, and Antonín Kouba. "A description of postembryonic development of Astacus astacus and Pontastacus leptodactylus." Freshwater Crayfish 25, no. 1 (April 15, 2020): 103–16. http://dx.doi.org/10.5869/fc.2020.v25-1.103.

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Abstract Morphology in general and developmental morphology in particular provide us with an insight into the evolution, phylogeny, ecological features, behavior, and life cycle of organisms. The present study describes the external morphology of the first three postembryonic developmental stages (Stage 1­3) of two prominent European crayfish species, the noble crayfish Astacus astacus (Linnaeus, 1758) and the narrow­clawed crayfish Pontastacus leptodactylus (Eschscholtz, 1823). External morphology and setation of appendages are similar, presence of re­curved tips for cheliped in Stage I and then the tip lost in Stage 2, long plumose setae on the telson in Stage 2 and then the setae disappearance in Stage 3 accompanied with the fully developed tail fan. The number of segments on antennal flagella differs between the species in Stage I and Stage II. Observed findings on early postembryonic development are consistent between European and North American (Pacifastacus sp.) astacid species, but differ in certain aspects from other crayfish families.
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Alvanou, Maria V., Apostolos P. Apostolidis, Athanasios Lattos, Basile Michaelidis, and Ioannis A. Giantsis. "The Coding Mitogenome of the Freshwater Crayfish Pontastacus leptodactylus (Decapoda:Astacidea:Astacidae) from Lake Vegoritida, Greece and Its Taxonomic Classification." Genes 14, no. 2 (February 15, 2023): 494. http://dx.doi.org/10.3390/genes14020494.

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Pontastacus leptodactylus (Eschscholtz, 1823) (Decapoda:Astacidea:Astacidae) constitutes an ecologically and economically highly important species. In the present study, the mitochondrial genome of the freshwater crayfish P. leptodactylus from Greece is analyzed for the first time, using 15 newly designed primer pairs based on available sequences of closely related species. The analyzed coding part of the mitochondrial genome of P. leptodactylus consists of 15,050 base pairs including 13 protein-coding genes (PCGs), 2 ribosomal RNA gene (rRNAs), and 22 transfer RNA genes (tRNAs). These newly designed primers may be particularly useful in future studies for analyzing different mitochondrial DNA segments. Based on the entire mitochondrial genome sequence, compared to other haplotypes from related species belonging in the same family (Astacidae) available in the GenBank database, a phylogenetic tree was constructed depicting the phylogenetic relationships of P. leptodactylus. Based on the results, the genetic distance between Astacus astacus and P. leptodactylus is smaller than the genetic distance between Austropotamobius pallipes and Austropotamobius torrentium, despite the fact that the latter two are classified within the same genus, questioning the phylogenetic position of A. astacus as a different genus than P. leptodactylus. In addition, the sample from Greece seems genetically distant compared with a conspecific haplotype available in the GenBank database, possibly implying a genetic distinction of P. leptodactylus from Greece.
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Kokko, Harri, Muzaffer M. Harlioglu, Hamdi Aydin, Jenny Makkonen, Gökhan Gökmen, Önder Aksu, and Japo Jussila. "Observations of crayfish plague infections in commercially important narrow-clawed crayfish populations in Turkey." Knowledge & Management of Aquatic Ecosystems, no. 419 (2018): 10. http://dx.doi.org/10.1051/kmae/2018001.

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We studied the presence of possible Aphanomyces astaci infections in eight Turkish narrow-clawed crayfish (Astacus leptodactylus) populations by analyzing the prevalence and genotypes of the disease agent A. astaci. The qPCR analyses revealed A. astaci infection in seven of the studied eight populations, with the agent level A2 or higher. The agent levels among the infected populations varied from A0 to A5, i.e., from negative to high level of infection, based on qPCR ranking. Based on the sequencing of the chitinase gene and the mitochondrial ribosomal rnnS and rnnL subunits, we detected both A (As) and B (PsI) haplogroups of A. astaci in our samples, with each of the studied populations being carriers of only one haplotype. The results confirm previous detections of A. astaci in Turkish narrow-clawed crayfish populations and reveal, that both A and B haplogroup A. astaci carriers exist widely in A. leptodactylus populations of Turkey.
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Kawai, Tadashi, and Jiří Patoka. "Morphological Observation of Museum Specimens of Astacus astacus and Pontastacus leptodactylus." Freshwater Crayfish 27, no. 1 (December 31, 2022): 49–68. http://dx.doi.org/10.5869/fc.2022.v27-1.49.

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Abstract 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. Several morphological variations in external morphology were detected, and the characters to discriminate between Astacus and Pontastacus have been used to update the diagnoses of these two genera.
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Kokko, H., L. Koistinen, M. M. Harlioğlu, J. Makkonen, H. Aydın, and J. Jussila. "Recovering Turkish narrow clawed crayfish (Astacus leptodactylus) populations carryAphanomyces astaci." Knowledge and Management of Aquatic Ecosystems, no. 404 (2012): 12. http://dx.doi.org/10.1051/kmae/2012006.

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Petrescu, Iorgu, and Ana-Maria Petrescu. "The catalogue of the freshwater crayfish (Crustacea: Decapoda: Astacidae) from Romania preserved in "Grigore Antipa" National Museum of Natural History of Bucharest." Travaux du Muséum National d'Histoire Naturelle "Grigore Antipa" 53, no. 1 (December 1, 2010): 115–23. http://dx.doi.org/10.2478/v10191-010-0008-5.

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The catalogue of the freshwater crayfish (Crustacea: Decapoda: Astacidae) from Romania preserved in "Grigore Antipa" National Museum of Natural History of Bucharest The largest collection of freshwater crayfish of Romania is preserved in "Grigore Antipa" National Museum of Natural History of Bucharest. The collection consists of 426 specimens of Astacus astacus, A. leptodactylus and Austropotamobius torrentium.
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Lele, Sandra-Florina, and Lucian Pârvulescu. "Crayfish chelae usage suggests predominantly ambidextrous habitude." Crustaceana 92, no. 3 (February 28, 2019): 257–67. http://dx.doi.org/10.1163/15685403-00003886.

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Abstract Heterochely is an important feature in some marine decapod crustaceans, but it is seldom investigated in freshwater crayfish. In this study, we applied a biometrical analysis targeting wild populations of three European crayfish species, Astacus leptodactylus, Astacus astacus, and Austropotamobius torrentium, as well as one invasive North American species, Faxonius limosus. Field data were combined with video-recorded observations to understand the usage of chelae in laboratory experiments for A. leptodactylus and F. limosus. According to biometrical measurements, heterochely was evenly distributed between species and sexes in wild populations, leading to the assumption that there is no specific pattern in chela size. Moreover, we found that the ambidextrous usage of chelae is a commonly encountered behaviour in crayfish, since no significant relationship was found between their chelae and asymmetry. This behaviour could maximize the chances of survival for crayfish in general, since losing one or both chelae is often recorded in the wild.
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Van Hoof, D., R. Witters, and R. Lontie. "The reaction of hydroxyurea with oxyhaemocyanin and methaemocyanin of the crayfish Astacus leptodactylus and the snail Helix pomatia." Biochemical Journal 254, no. 2 (September 1, 1988): 605–7. http://dx.doi.org/10.1042/bj2540605.

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The reaction of hydroxyurea with the oxyhaemocyanins of Astacus leptodactylus and Helix pomatia yielded methaemocyanins which could be regenerated with hydroxylamine. Hydroxyurea did not react with Astacus methaemocyanin, but quantitatively regenerated Helix methaemocyanin under N2. The reaction of hydroxyurea with Helix haemocyanin at pH 5.7 under air thus led to a steady state, with an oxyhaemocyanin/methaemocyanin ratio of 2.05:1.
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Dissertations / Theses on the topic "Astacus leptodactylus"

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Meer, Jeannette van de. "Adenosin und Urat modulieren die Sauerstoffversorgung des Sumpfkrebses Astacus leptodactylus." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=970361459.

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Kone, Youssouf. "Contribution à l'étude de la maturation ovarienne chez l'Ecrevisse Astacus (Pontastacus) leptodactylus Eschscholtz 1823." Bordeaux 1, 1985. http://www.theses.fr/1985BOR10533.

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La croissance ovarienne et ovocytaire chez astacus leptodactylus est marquee par trois etapes: la previtellogenese, les vitellogenees primaire et secondaire. La vitellogenese primaire debute par la formation de nombreuses microvillosites ovocytaires, accompagnee par une synthese importante de globules vitellins primaires. La vitellogenese secondaire est caracterisee par l'apparition de macrovillosites au niveau de la membrane ovocytaire et l'accumulation de globules vitellins definitifs. Le demarrage et le maintien de la vitellogenese seraient lies a l'activite des cellules folliculaires. Les faibles taux d'ecdysteroides sanguins consecutifs a l'exuviation chez l'ecrevisse et l'augmentation du taux de materiel immunoreactif dans l'ovaire pendant la vitellogenese pourraient etre mis en correlation avec la maturation ovarienne et les evenements ultrastructuraux observes au cours de la croissance ovocytaire. Au stade 2 du developpement ovarien, des fractions proteiques majeures (en particulier une fraction de pm 580 000 daltons), absentes chez les males, apparaissent dans le sang. Cette observation conforte les donnees ultrastructurales sur la participation possible d'un materiel d'origine exogene, a la formation des globules vitellins pendant la vitellogenese secondaire
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Tuncay, Yusuf Kır İsmail. "Kovada Gölü'nde yaşayan istakozlarda (Astacus leptodactylus eschscholtz, 1823) ağır metal birikiminin incelenmesi /." Isparta: SDÜ Fen Bilimleri Enstitüsü, 2007. http://tez.sdu.edu.tr/Tezler/TF01001.pdf.

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Stieb, Stefanie [Verfasser]. "Funktionelle, strukturelle und phylogenetische Untersuchungen an Lipoproteinen des Flusskrebses Astacus leptodactylus / Stefanie Stieb." Mainz : Universitätsbibliothek Mainz, 2012. http://d-nb.info/1022300482/34.

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Lassalle, ‎Philippe. "Echelle de développement cuticulotenses et ecdystéroïdes chez l'embryon de l'écrevisse Astacus (Fontastacus) leptodactylus." Bordeaux 1, 1985. http://www.theses.fr/1985BOR10543.

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Lassalle, Philippe. "Echelle de développement, cuticulogénèses et ecdystéroïdes chez l'embryon de l'écrevisse Astacus (Pontastacus) leptodactylus Eschscholtz 1823." Grenoble : ANRT, 1985. http://catalogue.bnf.fr/ark:/12148/cb375948843.

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Harlioğlu, Muzaffer Mustafa. "Comparative biology of the signal crayfish, Pacifastacus leniusculus (Dana), and the narrow-clawed crayfish, Astacus leptodactylus Eschscholtz." Thesis, University of Nottingham, 1996. http://eprints.nottingham.ac.uk/13339/.

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Some aspects of the biology of Pacifastacus leniusculus and Astacus leptodactylus have been compared. The literature survey shows that considerably more studies have been carried out on P. leniusculus than A. leptodactylus. Although no major differences have been found in the morphology of appendages and mouthparts of the species, structural differences have been found in the abundance of setae on the second maxilliped, in the number of teeth on the mandibles and the crista dentata, and form of the chelipeds. Studies on the environmental tolerance of the species show that both species are able to survive in saline water for long periods of time but they can only increase in number in low salinities. Both species can survive over a wide range of temperatures, but they cannot tolerate temperatures of 34 °C after stepwise acclimation. Although the results do not show a clear difference in the tolerance of P. leniusculus and A. leptodactylus to low oxygen, there are some indications that A. leptodactylus is more tolerant of decreased oxygen tensions than P. leniusculus. By using a non-invasive heart beat monitor on crayfish it has been observed that the frequency of heart beats is extremely variable and can be affected by many factors, such as temperature and salinity. Juveniles of the two species can have a significant impact on plant and macroinvertebrate communities. The results also show that both species can have a negative effect on the recruitment of fish populations in freshwaters by eating fish eggs. Competition experiments show that both juveniles and adults of P. leniusculus are significantly more aggressive than those of A. leptodactylus. The results also show that A. leptodactylus would be eliminated by P. leniusculus if they met in a wild. Adults of the species prey on their juveniles, except the brooding females with stage 2s. This predation occurs in the presence of adequate nutrition. Non-predatory behaviour of the brooding females may indicate the presence of pheromones in the species. Reproductive efficiency of the populations of the species in Britain is as good as any studied elsewhere. In comparison to A. leptodactylus, P. leniusculus has more eggs, but smaller in size. Pleopodal egg development of the species can be reduced from seven months to three months with temperature acclimation, but photoperiod is not a factor in reducing pleopodal egg development. In both species sexual dimorphism was observed between males and females. Males of both species and females of P. leniusculus exhibit allometric or isometric growth during their lives but female A. leptodactylus exhibits isometric growth throughout. Comparison of body parameters shows that P. leniusculus can be considered as a morphologically better species to adapt to environmental conditions than A. leptodactylus because it has large and heavy chelae, and heavy body weight. Both species grow fast, but because P. leniusculus hatches earlier it has an advantage over A. leptodactylus and has bigger juveniles by the end of the first summer. In both species males produce significantly more claw meat than females. Although A. leptodactylus produces significantly more tail meat, males of P. leniusculus produce significantly more claw and total meat. Significant differences occur in the tail meat yield of female A. leptodactylus and in the claw meat yield of female P. leniusculus, but males produce similar amount of meat in winter and summer. The Swedish trappy is very effective method of catching both species over a certain size. Day and night catches show that both species are very active during the day and night.
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Picquart, Véronique. "Recherches sur les infections fongiques des branchies à fusarium chez les crustacés Astacus leptodactylus esch. et Austropotamobius pallipes ler." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37608905h.

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Barradas, Cristina. "Rôle des organes branchiaux dans les échanges gazeux et ioniques chez l'écrevisse Astacus leptodactylus et chez le homard Homarus americanus." Lyon 1, 1999. http://www.theses.fr/1999LYO10339.

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Serrano, Laetitia. "Contrôle neuroendocrine de l'osmorégulation chez un crustacé d'eau douce, l'écrevisse "Astacus Leptodactylus" : Implication de l'hormone hyperglycémiante des crustacés et aspects ontogénétiques." Montpellier 2, 2004. http://www.theses.fr/2004MON20157.

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Book chapters on the topic "Astacus leptodactylus"

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Schneider, H. J., W. Voll, L. Lehmann, R. Grißhammer, A. Goettgens, and B. Linzen. "Partial Amino Acid Sequence of Crayfish (Astacus Leptodactylus) Hemocyanin." In Invertebrate Oxygen Carriers, 173–76. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-71481-8_31.

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Witters, R., D. Van Hoof, W. Deleersnijder, J. P. Tahon, and R. Lontie. "Preparation of a Methaemocyanin of Astacus Leptodactylus Regenerable with Hydroxylamine." In Invertebrate Oxygen Carriers, 445–48. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-71481-8_75.

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BIELEFELD, MARTINA, GERD GELLISSEN, and KLAUS-DIETER SPINDLER. "PROTEIN PRODUCTION AND THE MOULTING CYCLE IN THE CRAYFISH ASTACUS LEPTODACTYLUS—I." In Ecdysone, 175–80. Elsevier, 1986. http://dx.doi.org/10.1016/b978-0-08-032016-8.50027-1.

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McClain, W. Ray. "Crayfish Aquaculture." In Fisheries and Aquaculture, 260–84. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190865627.003.0011.

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Crayfish have been in demand as desirable food items around the globe for centuries, and entrepreneurs have capitalized on this demand by developing and applying aquaculture principals for the intentional culture of this freshwater crustacean. The current state of the art has advanced within the last half century and is centered on a handful of species, represented by three different families, with some level of commercial production occurring on all continents except Antarctica. Procambarus clarkii (family Cambaridae), a native of south central USA, is cultured in the USA and China and easily forms the bulk of farm-raised and wild-captured crayfish globally. One North American species (Pacifastacus leniusculus) and two European species (Astacus astacus and A. leptodactylus) constitute the main cultured species from the family Astacidae and are grown in small operations throughout Europe and parts of Asia. Four species (Parastacidae), all natives of Oceania, are cultured in their native ranges and were also introduced for aquaculture in several locations around the globe. Cherax destructor and C. albidus, both commonly referred to as yabby, are medium-size crayfish and share similar life histories, whereas C. quadricarinatus (redclaw crayfish) and C. cainii (smooth marron) are larger and more valuable but have very different geographical origins. While commercial crayfish aquaculture is typically based on an extensive or semi-extensive production approach in earthen ponds, more intensive approaches may involve selective breeding, improved strains, brood or nursery phases, and use of raceways or recirculation systems. Pond size can range from 0.05 to 80 ha, depending on the species cultured. Harvesting is accomplished mainly by baited trap, although other gear and techniques are sometimes employed. Global crayfish aquaculture production has expanded significantly in the last decade, due largely to the integration of Procambarus clarkii with that of rice production in the USA and China. This integrated system of production works well because rice farming has similar requirements as crayfish aquaculture, such as clay soils, irrigation systems, and suitable climates; furthermore, the rice crop residue provides the base of the food web for furnishing sustenance to growing crayfish.
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Conference papers on the topic "Astacus leptodactylus"

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Petrescu, Ana Maria. "Structural and ultrastructural description of the ovarian wall in astacid crayfish, {Astacus leptodactylus}." In 15th International Congress of Histochemistry and Cytochemistry. Istanbul: LookUs Scientific, 2017. http://dx.doi.org/10.5505/2017ichc.pp-153.

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