Studies on the quality, factors affecting motility and short - term storage of milt of the Indian mackerel, Rastrelliger kanagurta

摘要

A detailed study was conducted on the monthly variation in milt-volume, spermatozoaudconcentration and duration of motiUty of spermatozoa oi Rastrelliger kanagurta.udMilt-volume showed peak (0.094 ml) in the month of May. Spermatozoa concentrationuddid not vary much during the period of May to October (21.5-21.7 x lO'ml"').udDuration of motility in 100% seawater was observed to be maximum in the month ofudAugust (101.6 sec.) followed by October (96.53 sec.) and April (94.4 sec). Theudeffect of various dilutions of seawater on the duration of motility showed a decreasingudtrend with decrease in concentration. Maximum duration of motility (86.46 sec.)udwas observed in 100% seawater.