Ref ID : 104
Manuel Serra and Maria Rosa Miracle; Biometric variation in three strains of Brachionus plicatilis as a direct response to abiotic variables. Hydrobiologia 147:83-89, 1987
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Morphometric variation in three clones of Brachionus plicatilis cultured at 20 degrees C, 25 degrees C and 30 degrees C, and 9 0/00, 12 0/00 and 24 0/00 salinity was analysed. Size appeared to be largely under genetic control and this defined the narrow limits within which variation due to abiotic factors could occur. Temperature had a significant effect on size, but affected the three clones differently. The most general effect of temperature was a reduction in size which leveled off as the temperature rose. Of the measurements taken, only distance between the median spines was affected by salinity. An important inter-relationship between the effects of temperature and salinity was also detected.