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Statements

Subject Item
n2:RIV%2F60076658%3A12520%2F07%3A00007822%21RIV10-MSM-12520___
rdf:type
skos:Concept n19:Vysledek
dcterms:description
The aim of this study was to follow the gonadal development in freshwater crayfish Orconectes limosus (Rafinesque) by histological examination of ovaries and testes as well as monthly investigation of the gonadosomatic index over a period of one year. Male gonadosomatic index (I-G) ranged between 0.11 to 0.79% with a minimum in July (0.11 %) and maximum in September (0.79%) while in females it ranged between 0.25 to 6.15% with a minimum in July (0.25%) and maximum in April (6.15%). Between April and May, the histological dissection indicated presence of mature oocytes and oocytes undergoing resorption. Egg extrusion took place in mid April. During the summer months, the volume of oocytes gradually decreased. In winter and spring, the volume of oocytes began to increase during preparation for egg extrusion. The size of oocytes in the ovary increased from 0.2 mm at the beginning of the reproductive cycle to 1.8 mm immediately before egg extrusion. Average number of eggs in the ovary was 140.8 +/- 51.63 The aim of this study was to follow the gonadal development in freshwater crayfish Orconectes limosus (Rafinesque) by histological examination of ovaries and testes as well as monthly investigation of the gonadosomatic index over a period of one year. Male gonadosomatic index (I-G) ranged between 0.11 to 0.79% with a minimum in July (0.11 %) and maximum in September (0.79%) while in females it ranged between 0.25 to 6.15% with a minimum in July (0.25%) and maximum in April (6.15%). Between April and May, the histological dissection indicated presence of mature oocytes and oocytes undergoing resorption. Egg extrusion took place in mid April. During the summer months, the volume of oocytes gradually decreased. In winter and spring, the volume of oocytes began to increase during preparation for egg extrusion. The size of oocytes in the ovary increased from 0.2 mm at the beginning of the reproductive cycle to 1.8 mm immediately before egg extrusion. Average number of eggs in the ovary was 140.8 +/- 51.63
dcterms:title
Studies on annual gonadal development and gonadal ultrastructure i spiny-cheek crayfish (Orconectes limosus) Studies on annual gonadal development and gonadal ultrastructure i spiny-cheek crayfish (Orconectes limosus)
skos:prefLabel
Studies on annual gonadal development and gonadal ultrastructure i spiny-cheek crayfish (Orconectes limosus) Studies on annual gonadal development and gonadal ultrastructure i spiny-cheek crayfish (Orconectes limosus)
skos:notation
RIV/60076658:12520/07:00007822!RIV10-MSM-12520___
n3:aktivita
n14:Z n14:P
n3:aktivity
P(GP206/03/D064), P(ME 855), Z(MSM6007665809)
n3:cisloPeriodika
1
n3:dodaniDat
n12:2010
n3:domaciTvurceVysledku
n16:2489627 n16:9615210 n16:1799630
n3:druhVysledku
n18:J
n3:duvernostUdaju
n17:S
n3:entitaPredkladatele
n6:predkladatel
n3:idSjednocenehoVysledku
453106
n3:idVysledku
RIV/60076658:12520/07:00007822
n3:jazykVysledku
n4:eng
n3:klicovaSlova
gonadosomatic index; Orconectes limosus; ovary; testis; vas deferens; intersex
n3:klicoveSlovo
n9:ovary n9:gonadosomatic%20index n9:vas%20deferens n9:Orconectes%20limosus n9:testis n9:intersex
n3:kodStatuVydavatele
FR - Francouzská republika
n3:kontrolniKodProRIV
[44E124FE5075]
n3:nazevZdroje
BFPP-connaissance et gestion du patrimoine aquatique
n3:obor
n8:GL
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
4
n3:projekt
n10:GP206%2F03%2FD064 n10:ME%20855
n3:rokUplatneniVysledku
n12:2007
n3:svazekPeriodika
384
n3:tvurceVysledku
Hulák, Martin Kozák, Pavel Tichý, F. Policar, Tomáš
n3:wos
000249492000002
n3:zamer
n5:MSM6007665809
s:issn
1297-6318
s:numberOfPages
12
n11:organizacniJednotka
12520