Results 91 to 100 of about 810 (118)
Genome assembly of redclaw crayfish (Cherax quadricarinatus) provides insights into its immune adaptation and hypoxia tolerance. [PDF]
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Zootaxa, 2020
The use of color photographs in crayfish species descriptions, state faunal books and popular articles is relatively recent. Except for verbal color descriptions, color and color patterns have not often been explored by crayfish researchers.
G. Schuster
semanticscholar +3 more sources
The use of color photographs in crayfish species descriptions, state faunal books and popular articles is relatively recent. Except for verbal color descriptions, color and color patterns have not often been explored by crayfish researchers.
G. Schuster
semanticscholar +3 more sources
Global Diversity and Conservation of Freshwater Crayfish (Crustacea: Decapoda: Astacoidea)
, 2016The 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 ...
T. Kawai, K. Crandall
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, 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 ...
P. Vezza, D. Ghia, G. Fea
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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 ...
P. Vezza, D. Ghia, G. Fea
semanticscholar +2 more sources
MATING BEHAVIOR OF THE CRAYFISH ORCONECTES NAIS (FAXON, 1885) (DECAPODA, ASTACOIDEA)
Crustaceana, 1977[La conduite d'appariement des Orconectes nais etait la meme que celle d'autres especes d'ecrevisses sauf l'approche du mâle a la femelle et les manoeuvres du mâle pour mettre la femelle dans une position renversee. Sa conduite d'approche consistait en tendant les seconde et troisieme paires de pereiopodes pour prendre la femelle et la manipuler dans ...
Martha R. Pippitt
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Zoologischer Anzeiger - A Journal of Comparative Zoology, 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 .
H. Niksirat +4 more
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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 .
H. Niksirat +4 more
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Freshwater Crayfishes (Astacoidea)
, 1997Crayfishes 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.
R. Ingle
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Australian Journal of Zoology, 1972
The development of the cephalothoracic grooves, orientation of the chelae in life (correlated with burrowing), and modifications of the sexual characters of the males are the main attributes utilized in deducing the probable phylogeny of the Parastacidae.
E. Riek
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The development of the cephalothoracic grooves, orientation of the chelae in life (correlated with burrowing), and modifications of the sexual characters of the males are the main attributes utilized in deducing the probable phylogeny of the Parastacidae.
E. Riek
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Crustaceana, 1977
Die Hautungszyklen von normal ernahrten und von hungernden Faxonella clypeata wurden im Labor untersucht, um Wechselbeziehungen zwischen bestimmten, wahrend der Proecdysis ablaufenden Ereignissen (Ablosen der Epidermis von der alten Kutikula, Bildung von Gastrolithen, Borsten und neuer Kutikula) zu studieren. Das Stadium Do machte etwa 50-70% der Dauer
K. Rao +3 more
semanticscholar +2 more sources
Die Hautungszyklen von normal ernahrten und von hungernden Faxonella clypeata wurden im Labor untersucht, um Wechselbeziehungen zwischen bestimmten, wahrend der Proecdysis ablaufenden Ereignissen (Ablosen der Epidermis von der alten Kutikula, Bildung von Gastrolithen, Borsten und neuer Kutikula) zu studieren. Das Stadium Do machte etwa 50-70% der Dauer
K. Rao +3 more
semanticscholar +2 more sources
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
N. Kato, T. Miyashita
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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
N. Kato, T. Miyashita
semanticscholar +2 more sources