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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Annual cycle of spawning and molting in the red-claw crayfish, Cherax quadricarinatus, under laboratory conditions
Year:
1997
Source of publication :
Aquaculture (source)
Authors :
ברקי, אסף
;
.
חולתא, גדעון
;
.
לוי, טל
;
.
קרפלוס, אילן
;
.
Volume :
157
Co-Authors:
Barki, A., Department of Aquaculture, Institute of Animal Science, Agricultural Research Organization, P.O. Box 6, Bet Dagan 50250, Israel
Levi, T., Department of Aquaculture, Institute of Animal Science, Agricultural Research Organization, P.O. Box 6, Bet Dagan 50250, Israel
Hulata, G., Department of Aquaculture, Institute of Animal Science, Agricultural Research Organization, P.O. Box 6, Bet Dagan 50250, Israel
Karplus, I., Department of Aquaculture, Institute of Animal Science, Agricultural Research Organization, P.O. Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
239
To page:
249
(
Total pages:
11
)
Abstract:
The annual spawning and molting cycles of the Australian red-claw crayfish was studied in the laboratory over a period of 13 months. Sexually mature crayfish were maintained in 140-l tanks, each containing four females and one male, under a constant temperature (26-28°C) and either an ambient or a controlled (14 L:10 D) photoperiod. A similar annual pattern of spawning and molting was evident under the two photoperiod regimes. Females spawned three times and molted twice a year on average. Most spawning occurred during spring and summer, and molting occurred mainly after the breeding season but also between spawns. Variable sequences of spawning and molting were evident during the breeding months in each photoperiod condition. The most common sequences were spawn-molt-spawn and spawn-spawn-molt, with the females as likely to spawn as to molt following the first spawning. An intervening spawning elongated the time interval between molts but did not affect the molt increment. The number of juveniles per spawn was positively correlated with female size, whereas juvenile weight was not. There was an increase in fecundity between successive spawns in females from the controlled, but not ambient, photoperiod, probably due to difference in their spawning history (novice and experienced spawners, respectively). The environmental manipulation applied here failed to maintain continuous spawning over the year in Cherax quadricarinatus broodstock.
Note:
Related Files :
annual cycle
Annual spawning cycle
Cherax quadricarinatus
Decapoda
Growth
red-claw crayfish
spawning
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/S0044-8486(97)00163-4
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
31014
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:59
You may also be interested in
Scientific Publication
Annual cycle of spawning and molting in the red-claw crayfish, Cherax quadricarinatus, under laboratory conditions
157
Barki, A., Department of Aquaculture, Institute of Animal Science, Agricultural Research Organization, P.O. Box 6, Bet Dagan 50250, Israel
Levi, T., Department of Aquaculture, Institute of Animal Science, Agricultural Research Organization, P.O. Box 6, Bet Dagan 50250, Israel
Hulata, G., Department of Aquaculture, Institute of Animal Science, Agricultural Research Organization, P.O. Box 6, Bet Dagan 50250, Israel
Karplus, I., Department of Aquaculture, Institute of Animal Science, Agricultural Research Organization, P.O. Box 6, Bet Dagan 50250, Israel
Annual cycle of spawning and molting in the red-claw crayfish, Cherax quadricarinatus, under laboratory conditions
The annual spawning and molting cycles of the Australian red-claw crayfish was studied in the laboratory over a period of 13 months. Sexually mature crayfish were maintained in 140-l tanks, each containing four females and one male, under a constant temperature (26-28°C) and either an ambient or a controlled (14 L:10 D) photoperiod. A similar annual pattern of spawning and molting was evident under the two photoperiod regimes. Females spawned three times and molted twice a year on average. Most spawning occurred during spring and summer, and molting occurred mainly after the breeding season but also between spawns. Variable sequences of spawning and molting were evident during the breeding months in each photoperiod condition. The most common sequences were spawn-molt-spawn and spawn-spawn-molt, with the females as likely to spawn as to molt following the first spawning. An intervening spawning elongated the time interval between molts but did not affect the molt increment. The number of juveniles per spawn was positively correlated with female size, whereas juvenile weight was not. There was an increase in fecundity between successive spawns in females from the controlled, but not ambient, photoperiod, probably due to difference in their spawning history (novice and experienced spawners, respectively). The environmental manipulation applied here failed to maintain continuous spawning over the year in Cherax quadricarinatus broodstock.
Scientific Publication
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