Sperm biology of artificially induced common carp, Cyprinus carpio (Linnaeus, 1758)

Hatchery production of common carp seed has been practiced for several decades in Bangladesh but information on sperm biology of induced broods is limited. The study aimed to determine the sperm biology artificially induced broods to improve the current hatchery management. Sperm volume, motility, concentration and pH were 2.04±1.07 µl g -1 of fish, 93±3 %, 1.77±0.49×10 10 cells ml -1 and 7.59±0.29, respectively. There has been a substantial variation (p<0.05) in volume (µl g -1 of fish), concentration (×10 10 cells ml -1 ) and motility (%) among the fortnightly collected sperm samples. The motility (%) of the fresh sperm was similar in all the activation media tested, however, sperm were motile for longer duration in 0.3% than in 0.2% NaCl, tap water and distilled water. Sperm biology of the induced broods would be useful in breeding programs advancing the development of aquaculture of the species.