Results 71 to 80 of about 6,148 (217)

Study of Phenotypic Correlations between Morphologic Characters and Body Parameters at River Male Lobsters (Astacus Fluviatilis)

open access: yesScientific Papers Animal Science and Biotechnologies, 2023
The body measurements was made on 20 males of river lobster (Astacus fluviatilis or Astacus astacus). The lobsters on witch the study was made had an average total length of body of 12.72 cm ±0.19 cm (formed from: 6.07±0.10cm the length of cefalothorax ...
Marian Bura   +3 more
doaj  

ОСОБЕННОСТИ ГЕНЕТИЧЕСКОЙ СТРУКТУРЫ ПОПУЛЯЦИЙ И МОРФОЛОГИЧЕСКАЯ ИЗМЕНЧИВОСТЬ ПОПУЛЯЦИЙ РЕЧНЫХ РАКОВ ASTACUS FABRICIUS, 1775 ЮГО-ВОСТОКА УКРАИНЫ [PDF]

open access: yes, 2012
Комплексное исследование четырех выборок речных раков из речных систем юго-востока Украины, базирующееся на аллозимах и внешней морфологии, показало присутствие в регионе трех видов.
Жалай, Е. И.   +2 more
core  

eDNA‐Based Detection of Invasive Crayfish and Crayfish Plague in Estonia

open access: yesEnvironmental DNA, Volume 7, Issue 3, May–June 2025.
Our study explored the potential of integrating the eDNA approach into ongoing annual monitoring programs for invasive crayfish species and A. astaci. Crayfish eDNA was detected in 9 out of 14 water bodies where presence was confirmed by trapping, yielding 64% detection efficiency. eDNA from A.
Michael Oliewo Aluma   +4 more
wiley   +1 more source

Research Regarding Somatic Measurements at River Lobster Males (Astacus Fluviatilis)

open access: yesScientific Papers Animal Science and Biotechnologies, 2023
The body measurements was made on 20 males of river lobsters (Astacus fluviatilis or Astacus astacus). The lobsters on witch the study was made had an average total length of body of 12.72 cm ±0.19 cm (formed from: 6.07±0.10cm the length of cefalothorax,
Marian Bura   +3 more
doaj  

Population characteristics of the narrow-clawed crayfish (Astacus leptodactylus Eschscholtz, 1823) in the Treće jezero of the Maksimir Park [PDF]

open access: yes, 2016
Uskoškari rak (Astacus leptodactylus Eschscholtz, 1823) pripada porodici Astacidae te je autohtona europska slatkovodna vrsta koja naseljava stajaćice i spore vodotoke. Cilj ovog rada je opisati populacijske značajke uskoškarog raka u Trećem jezeru parka
Orešković, Mislav
core   +1 more source

Reproductive Interference Alters Species Coexistence in Nematodes due to Asymmetric Sperm‐Induced Harm

open access: yesEcology Letters, Volume 28, Issue 1, January 2025.
We test how reproductive interference from inter‐species mating between sympatric Caenorhabditis nematodes can influence species coexistence and exclusion. We demonstrate that females from the species with higher intrinsic population growth experience reduced lifespan and fecundity due to incomplete interspecies mate discrimination that leads to ...
Rebecca Schalkowski   +3 more
wiley   +1 more source

The continuing spread of Pacifastacus leniusculus in Carinthia (Austria) [PDF]

open access: yesKnowledge and Management of Aquatic Ecosystems, 2009
Crayfish plague and introductions of non-indigenous freshwater crayfish species (NICS) have had major consequences for the survival of autochthonous crayfish populations in Europe.
M. Weinländer, L. Füreder
doaj  

Population genetic structure analysis of the freshwater crayfish (Astacus leptodactylus) in different region inferred from mtDNA control region sequencing [PDF]

open access: yes, 2016
In this study population genetic structure of freshwater crayfish (Astacus leptodactylus) in Iran was investigated using direct sequencing of mtDNA control region. A total of 132 samples were collected from the different locations.
Khoshkholgh, Majidreza, Nazari, Sajad
core  

ОСОБЕННОСТИ АЛЛОЗИМНОЙ ИЗМЕНЧИВОСТИ В ПОПУЛЯЦИЯХ ДЛИННОПАЛЫХ РАКОВ (PONTASTACUS BOTT, 1950) В ПРЕДЕЛАХ УКРАИНЫ [PDF]

open access: yes, 2012
Анализ аллозимной изменчивости выборок длиннопалых раков Pontastacus leptodactylus s. lato показал их четкую генетическую дифференциацию на две группы.
Жалай, Е. И.   +2 more
core  

Multiple drivers of decline in the global status of freshwater crayfish (Decapoda: Astacidea) [PDF]

open access: yes, 2015
Rates of biodiversity loss are higher in freshwater ecosystems than in most terrestrial or marine ecosystems, making freshwater conservation a priority.
Collen, Ben   +2 more
core   +1 more source

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