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Statements

Subject Item
n2:RIV%2F60076658%3A12520%2F13%3A43885196%21RIV14-GA0-12520___
rdf:type
n9:Vysledek skos:Concept
rdfs:seeAlso
http://onlinelibrary.wiley.com/doi/10.1002/jmor.20132/abstract
dcterms:description
This study reports about the spermatozoal ultrastructure of three species of astacid crayfish, i.e., the stone crayfish Austropotamobius torrentium, signal crayfish Pacifastacus leniusculus, and noble crayfish Astacus astacus. The acrosome is a cup shaped and electron-dense structure at the anterior of the spermatozoon and comprises three layers of differing electron densities filled with parallel filaments that extend from the base to the apical zone. The acrosome was significantly longer in A. astacus than in P. leniusculus and the shortest acrosome belongs to A. torrentium. The width of the acrosome was significantly narrower in A. torrentium than in P. leniusculus and the widest acrosome belongs to A. astacus. The L:W ratio was significantly greater in A. torrentium than in P. leniusculus and the lowest ratio belongs to A. astacus. Radial arms are visible on each side of the acrosome or nucleus in sagittal view and wrap around the spermatozoon. Each radial arm comprises a parallel bundle of microtubules arranged along the long axis within a sheath. The nucleus, with decondensed material, is located in the posterior of the cell. All parts of the spermatozoon are tightly enclosed within an extracellular capsule. Despite a well-conserved general structure and similarity of pattern among these spermatozoa, differences in the dimensions of the acrosome within the studied species may be useful to help distinguish the different crayfish species. J. Morphol., 2013. (c) 2013 Wiley Periodicals, Inc. This study reports about the spermatozoal ultrastructure of three species of astacid crayfish, i.e., the stone crayfish Austropotamobius torrentium, signal crayfish Pacifastacus leniusculus, and noble crayfish Astacus astacus. The acrosome is a cup shaped and electron-dense structure at the anterior of the spermatozoon and comprises three layers of differing electron densities filled with parallel filaments that extend from the base to the apical zone. The acrosome was significantly longer in A. astacus than in P. leniusculus and the shortest acrosome belongs to A. torrentium. The width of the acrosome was significantly narrower in A. torrentium than in P. leniusculus and the widest acrosome belongs to A. astacus. The L:W ratio was significantly greater in A. torrentium than in P. leniusculus and the lowest ratio belongs to A. astacus. Radial arms are visible on each side of the acrosome or nucleus in sagittal view and wrap around the spermatozoon. Each radial arm comprises a parallel bundle of microtubules arranged along the long axis within a sheath. The nucleus, with decondensed material, is located in the posterior of the cell. All parts of the spermatozoon are tightly enclosed within an extracellular capsule. Despite a well-conserved general structure and similarity of pattern among these spermatozoa, differences in the dimensions of the acrosome within the studied species may be useful to help distinguish the different crayfish species. J. Morphol., 2013. (c) 2013 Wiley Periodicals, Inc.
dcterms:title
Comparative ultrastructure of the spermatozoa of three crayfish species: Austropotamobius torrentium, Pacifastacus leniusculus, and Astacus astacus (Decapoda: Astacidae) Comparative ultrastructure of the spermatozoa of three crayfish species: Austropotamobius torrentium, Pacifastacus leniusculus, and Astacus astacus (Decapoda: Astacidae)
skos:prefLabel
Comparative ultrastructure of the spermatozoa of three crayfish species: Austropotamobius torrentium, Pacifastacus leniusculus, and Astacus astacus (Decapoda: Astacidae) Comparative ultrastructure of the spermatozoa of three crayfish species: Austropotamobius torrentium, Pacifastacus leniusculus, and Astacus astacus (Decapoda: Astacidae)
skos:notation
RIV/60076658:12520/13:43885196!RIV14-GA0-12520___
n9:predkladatel
n18:orjk%3A12520
n5:aktivita
n20:S n20:P
n5:aktivity
P(ED2.1.00/01.0024), P(GAP505/12/0545), P(GPP502/12/P177), P(ME10125), S
n5:cisloPeriodika
7
n5:dodaniDat
n7:2014
n5:domaciTvurceVysledku
n12:1760173 n12:5876001 n12:9615210 n12:2565676
n5:druhVysledku
n19:J
n5:duvernostUdaju
n8:S
n5:entitaPredkladatele
n21:predkladatel
n5:idSjednocenehoVysledku
66100
n5:idVysledku
RIV/60076658:12520/13:43885196
n5:jazykVysledku
n17:eng
n5:klicovaSlova
transmission electron microscopy; stone crayfish; spermatozoon; decapods; acrosome
n5:klicoveSlovo
n6:decapods n6:stone%20crayfish n6:acrosome n6:spermatozoon n6:transmission%20electron%20microscopy
n5:kodStatuVydavatele
US - Spojené státy americké
n5:kontrolniKodProRIV
[FC9B28ECC628]
n5:nazevZdroje
Journal of Morphology
n5:obor
n15:EA
n5:pocetDomacichTvurcuVysledku
4
n5:pocetTvurcuVysledku
4
n5:projekt
n14:GPP502%2F12%2FP177 n14:GAP505%2F12%2F0545 n14:ED2.1.00%2F01.0024 n14:ME10125
n5:rokUplatneniVysledku
n7:2013
n5:svazekPeriodika
274
n5:tvurceVysledku
Kozák, Pavel Kouba, Antonín Niksirat Hashjin, Hamid Rodina, Marek
n5:wos
000320404800004
s:issn
0362-2525
s:numberOfPages
9
n13:doi
10.1002/jmor.20132
n4:organizacniJednotka
12520