Publication Date:
2021-05-19
Description:
The effects of various salinity levels among (0‰, 5‰, 10‰, 15‰, and 20‰) for
successful breeding of common carp, Cyprinus carpio were investigated. The duration
of study was 75 days. Ripe broodstock (30) having a mean weight (male 1027±2.4g and
female 1084.8±23g) were selected and stocked into spawning tanks (2000 L). The ratio
among male and female was 2:1. They were fed with commercial floating pelleted feed
having 35% crude protein with 2% body weight twice a day. Broodstock were injected
with ovaprim hormone 0.5 mg kg^-1
female and male 0.2 mg kg^-1
respectively, after
successful spawning broodstock were removed from spawning tanks. The results
showed that the highest fecundity, fertility, hatchability and survival of fry were
obtained on salinity of 0‰ to 10‰ and significantly decreased on 15‰ and 20‰. The
eggs per gram body weight were also recorded in all treatments and highest eggs were
obtained, i.e. 45-60 per female on salinity of 0‰-10‰. Water temperature
(22.4±0.2°C), dissolved oxygen (6.5±0.2 mg L^-1
), pH (7.2±0.2) and ammonia (less than
0.03±0.06 mg L^-1) were monitored throughout the study period. Water quality
parameters remained within the recommended range. Our results suggest that common
carp, C. carpio may give maximum eggs up to 10 ‰ salinity with 81% survival of the
fry.
Description:
Published
Keywords:
Common carp
;
Breeding
;
Ovaprim
;
Salinity
;
Semi-natural
;
Spawning
;
Fertilization
;
Hatching
;
Survival
;
Cyprinus carpio
Repository Name:
AquaDocs
Type:
Journal Contribution
,
Refereed
Format:
pp.790-804
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