Results 31 to 40 of about 272 (158)

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   +3 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

PCR detection of the crayfish plague pathogen in narrow-clawed crayfish inhabiting Lake Eğirdir in Turkey [PDF]

open access: yesDiseases of Aquatic Organisms, 2012
Many populations of the narrow-clawed crayfish Astacus leptodactylus in Turkey, including those inhabiting Lake Eğirdir, declined drastically in the mid-1980s due to introduction of crayfish plague Aphanomyces astaci. However, unlike many other localities, there has been some recovery in the A.
Kozubikova, E.   +8 more
openaire   +4 more sources

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

The expansion of freshwater crayfish range to the center of Eurasia

open access: yesNauplius, 2020
Freshwater crayfish were previously absent in the territory stretching from the Caspian Sea basin to the Amur basin. That gap is now being filled, mainly due to the eastward invasion of the narrow-clawed crayfish Astacus leptodactylus, which has ...
Igor Popov
doaj   +1 more source

Levels of accumulation of heavy metals and activity of radionuclides in narrow-clawed crayfish (Astacus leptodactylus Eschscholtz, 1823) of the Kamianske and Zaporizhzhia (Dnipro) reservoirs

open access: yesRibogospodarsʹka Nauka Ukraïni, 2023
Purpose. To determine the content of heavy metals as well as natural and artificial radionuclides in muscle tissue and carapaces of narrow-clawed crayfish Astacus leptodactylus of the Kamianske and Zaporizhzhia (Dnipro) reservoirs. Methodology.
P. Korzhenevska   +3 more
doaj   +1 more source

Determination of the hygienic quality of Astacus leptodactylus captured from Haft Barm lakes, Fars Province (Iran) in terms of trace metals accumulated in the product [PDF]

open access: yesBihdāsht-i Mavādd-i Ghaz̠āyī, 2021
< p >Regards the economic potential in extensive rearing of Narrow-clawed crayfish (Astacus leptodactylus) in Haft Barm lakes, Fars Province (Iran), and considering the chain value and global marketing, we need to monitoring programs on hygienic quality ...
N. Shiry   +4 more
doaj   +1 more source

The features of narrow-clawed crayfish (Pontastacus leptodactylus Eschscholtz, 1823) population development in Lake Sevan during 1996–2018

open access: yesТрансформация экосистем, 2019
The narrow-clawed crayfish, an invasive hydrobiont of Lake Sevan appeared in the lake due to accidental introduction having occupied almost the entire territory of Lake Sevan, finding favorable conditions for its existence.
Evelina Kh. Ghukasyan   +3 more
doaj   +1 more source

Fecundity of the narrow-clawed crayfish Pontastacus leptodactylus in the water bodies of Belarus

open access: yesProceedings of the National Academy of Sciences of Belarus, Biological Series, 2023
Pre-larvae hatching fecundity and ovarian fecundity of narrow-clawed crayfish populations were estimated in the lakes and reservoirs of Belarus. Statistically significant differences in the fecundity of females from various water bodies were noted only for Lake Kichino.
openaire   +1 more source

Reproductive efficiency of the narrow-clawed crayfish, Astacus leptodactylus, in several populations in Turkey

open access: yesCrustaceana, 2009
Studies were carried out to evaluate the reproductive efficiency of the narrow-clawed crayfish, Astacus leptodactylus Eschscholtz, 1823, in three different populations in the lakes Apolyont, Iznik, and Manyas in Turkey. Crayfish were sampled monthly using fyke-nets of 34 mm mesh size from April 2002 until March 2003.
Berber, Selcuk, Mazlum, Yavuz
openaire   +3 more sources

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