Results 81 to 90 of about 751 (107)

Deep attention model for arrhythmia signal classification based on multi-objective crayfish optimization algorithmic variational mode decomposition. [PDF]

Sci Rep
Zhang Y, Zhao H.
europepmc   +1 more source

Linking the production of reactive oxygen species to the expression of antimicrobial peptides through aquaporin in an arthropod. [PDF]

Proc Natl Acad Sci U S A
Wei Z, Liu PP, Wang WG, Wang XW.
europepmc   +1 more source

Hybrid strategy enhanced crayfish optimization algorithm for breast cancer prediction. [PDF]

Sci Rep
Li YJ.
europepmc   +1 more source

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Freshwater Crayfishes (Astacoidea)

1997
Crayfishes inhabiting the northern hemisphere and discussed below belong to the superfamily Astacoidea. Species of this superfamily have the first and second pairs of pleopods present. The first pair of the female may be quite small, but for the male these , and the second pair, are modified as sperm transference organs [gonopods, figs.
Ingle Ray
exaly   +2 more sources

Global Diversity and Conservation of Freshwater Crayfish (Crustacea: Decapoda: Astacoidea)

2016
The number of species in the three families of freshwater crayfish worldwide (Astacidae, Cambaridae, and Parastacidae) are updated by region. These are: Astacidae, western North America (5 species) and Europe (5 species), Cambaridae, eastern North America and Mexico (423 species) and Asia (6 species), and Parastacidae, Oceania (153 species), South ...
, Keith A Crandall, Crandall Keith A
exaly   +2 more sources

Remains of decapod crustaceans from the late Cenomanian and early Turonian of the Czech Republic mistakenly assigned to crayfishes (Astacoidea)

Journal of Crustacean Biology, 2023
Abstract Two species of fossil crustaceans from the Czech Republic are assigned to AstacusFabricius, 1775, a European crayfish: A. laevissimusFritsch & Kafka, 1887 and A. cenomanensisFritsch & Kafka, 1887. Both come from marine sediments, making doubtful their assignment to crayfishes.
, Denis Audo, Martina Kocova Veselska
exaly   +3 more sources

Ultrastructure of spermatozoa from three genera of crayfish Orconectes, Procambarus and Astacus (Decapoda: Astacoidea): New findings and comparisons

Zoologischer Anzeiger, 2013
Abstract Ultrastructure of spermatozoa of three crayfish genera including Orconectes limosus (Rafinesque, 1817), Procambarus clarkii (Girard, 1852), and Astacus leptodactylus (Eschscholtz, 1823) was studied using transmission electron microscopy. The length of the acrosome was significantly greater in A .
Antonin Kouba, Martin Psenicka, Pavel Kozak   +2 more
exaly   +2 more sources

Sexual difference in modes of selection on the pleopods of crayfish (Decapoda: Astacoidea) revealed by the allometry of developmentally homologous traits

Canadian Journal of Zoology, 2003
Crayfish have five pairs of abdominal limbs called pleopods. In males, the first and second pairs of pleopods are used for transferring spermatophores to the female during copulation. The remaining pleopods in males have no obvious function. Female crayfish use their pleopods to carry eggs. Accordingly, it is expected that the selection pressures that
Tadashi Miyashita
exaly   +2 more sources

Quantitative Habitat Models for the Conservation of the Endangered European Crayfish Austropotamobius pallipes Complex (Astacoidea: Astacidae)

2016
Crayfish are the largest mobile freshwater invertebrates and are keystone species in European aquatic ecosystems particularly in small streams and rivers. The white-clawed crayfish Austropotamobius pallipes (a species complex) is currently classified by the IUCN Red List as an endangered species (EN), because its populations have decreased ...
Paolo Vezza, Daniela Ghia, Ghia Daniela   +2 more
exaly   +3 more sources

Appeasement Displays in Cambarid Crayfish (Decapoda, Astacoidea)

1979
exaly   +2 more sources