Results 31 to 40 of about 1,631 (226)

Cheliped loss and abnormalities of the narrow-clawed crayfish, Pontastacus leptodactylus (Eschscholtz, 1823) (Crustacea: Decapoda: Astacidae) [PDF]

open access: yesNauplius
Heterochely is an important phenomenon in decapod crustaceans. Nevertheless, it was rarely examined in freshwater crayfish. Therefore, the aim of this study was to investigate cheliped loss and abnormalities of the narrow-clawed crayfish, Pontastacus ...
Selçuk Berber   +2 more
doaj   +4 more sources

Morphology of the narrow-clawed crayfish (Astacus leptodactylus Eschscholtz, 1823) in the north-west Croatia [PDF]

open access: green, 2017
Astacus leptodactylus jedna je od četiri nativne vrste porodice Astacidae u Hrvatskoj, ujedno je i ključna vrsta u slatkovodnim ekosustavima. Unatoč važnosti vrste A. leptodactylus, općenito nedostaju podaci o toj vrsti na europskom nivou.
Tamara Preininger
openalex   +3 more sources

Molecular-genetic testing of freshwater species and breeds of animals (fish, narrow-clawed crayfish, mollusks)

open access: diamondFaktori eksperimental'noi evolucii organizmiv, 2018
Aim. Description of the results of molecular genetic studies of a number of fish, narrow-clawed crayfish, and mollusk species. Methods. For the analysis, RAPD, SSR, and DNA-barcoding methods were used. Results. Unique RAPD amplicones were identified to differentiate Lahvinsky, Tremlyansky and Isobelinsky carp breeds.
С. Е. Дромашко   +5 more
openalex   +3 more sources

The sublethal effects of (2,4-Dichlorophenoxy) acetic acid (2,4-D) on narrow-clawed crayfish (Astacus leptodactylus Eschscholtz, 1823) [PDF]

open access: diamondArchives of Industrial Hygiene and Toxicology, 2016
Abstract2,4-D is a widely used phenoxy herbicide, potentially toxic to humans and biota. The objective of the present study was to reveal short term sublethal effects of 2,4-D on narrow-clawed freshwater crayfish (Astacus leptodactylus Eschscholtz, 1823), based on histology, total haemocyte counts, selected haemolymph parameters, and oxidative stress ...
A. Çağlan Karasu Benlı   +4 more
openalex   +6 more sources

Influence of temperature on embryonic development of Pontastacus leptodactylus freshwater crayfish, and characterization of growth and osmoregulation related genes [PDF]

open access: yesBMC Zoology
Narrow clawed crayfish, Pontastacus (Astacus) leptodactylus, represents an ecologically and economically valuable freshwater species. Despite the high importance of artificial breeding for conservation purpose and aquaculture potential, hatching ...
Maria V. Alvanou   +6 more
doaj   +2 more sources

Artificial extrusion of spermatophores for insemination of the narrow-clawed crayfish Pontastacus leptodactylus (Eschscholtz, 1823)

open access: yesAquaculture Reports, 2019
The extrusion of spermatophores using electrical stimulation and dissection techniques from the vas deference was performed to test the feasibility of artificial insemination in Pontastacus leptodactylus.
Ardavan Farhadi   +2 more
doaj   +2 more sources

Better Alone Than in Bad Company: Trophic Ecology of Co-Occurring Invasive and Native Crayfish. [PDF]

open access: yesEcol Evol
This study investigated and compared trophic interactions between invasive signal crayfish and native white‐clawed crayfish at sites of co‐occurrence and in allopatry. The presence of crayfish plague, body condition, and trophic niche traits were explored as possible factors that make invasive signal crayfish a strong competitor, enhancing its ...
Ghia D   +8 more
europepmc   +2 more sources

Physiology of Ovarian Development in Crustaceans: Interactions Among Hormones, Nutrients, and Environmental Factors From Integrated Perspectives. [PDF]

open access: yesAquac Nutr
Reproductive maturation remains a central bottleneck in crustacean aquaculture, as ovarian development dictates broodstock quality, fecundity, and larval viability. This review synthesizes current knowledge on the physiological regulation of ovarian maturation in decapod crustaceans, emphasizing the interplay of hormones, nutrients, and environmental ...
Dildar T, Cui W, Ma H.
europepmc   +2 more sources

Some features of crustacean cultivation aquabiotechnology on the waters of energy facilities [PDF]

open access: yesE3S Web of Conferences, 2021
The data on the state of the crayfish population on the territory of the Middle Volga before its regulation and after the formation of reservoirs are presented.
Kalaida Marina   +2 more
doaj   +1 more source

Fusarium oxysporum causes black gill disease in narrow-clawed crayfish Pontastacus leptodactylus

open access: yesDiseases of Aquatic Organisms, 2022
Morphological and molecular analyses were carried out to determine the causative agent of black gill disease in narrow-clawed crayfish Pontastacus leptodactylus specimens collected from 6 lakes (Taşkısığı, Beyşehir, Karaidemir, Karataş, Manyas, and Gölhisar) in Turkey.
Tastan, Yigit, Cagatay, Ifakat Tulay
openaire   +3 more sources

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