Abstract
Previous studies on reproduction in the red claw crayfish, Cherax quadricarinatus, have successfully employed broodstock densities of up to 20 crayfish m −2. This study attempted to increase the density of broodstock in order to intensify production of young in indoor hatcheries. Adult crayfish were stocked in 0.3 m 2 tanks at a 1:5 M:F sex ratio at three densities: 6, 12 and 18 crayfish per tank (corresponding to 20, 40 and 60 m −2). The number of berried females was noted at weekly intervals during 14 weeks. There was no difference among densities in survival rate and percentage of spawning and molting, nor in clutch size (pleopodal egg counts) of females. The results indicated that breeding red claw females are insensitive to crowding over a wide range of densities. They suggest that a broodstock density higher than 60 crayfish m −2 is feasible under indoor hatchery conditions.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
