Table 1.

Reproductive performance of bdelloid and monogont rotifers exposed to IR

SpeciesDose, hParental wellsDaughter wells
Wells with eggs, nWells with F1, nTotal eggs, nTotal eggs hatched, nRelative parental fertilityRelative parental fecundityWells with eggs, nWells with F2, nTotal eggs hatched, nRelative F1 fertilityRelative F1 fecundity
E. dilatata081682902491.001.0058581.00
18226272350.380.14960.27
278026600.000.00n/an/an/a
384027800.000.00n/an/an/a
E. dilatata088863242911.001.0065641.00
0.587803021600.930.5545400.67
18724278580.280.2015100.56
285231620.020.01100.00
E. dilatata083836135881.001.0078781,0851.001.00
0.2586865774611.040.7874729770.890.87
0.588826023600.990.6173546120.700.57
1.58214538240.170.044190.080.05
A. vaga089899858661.001.0087871.00
291901,0638451.010.9887860.98
488841,2406720.940.7880780.95
693621,0021870.700.2254500.83
89261,169120.070.01320.34
P. roseola095951,9141,5691.001.0092922,3561.001.00
296951,9561,1341.000.7291891,8770.970.80
493761,8736380.800.4173671,2010.910.64
689461,6902170.480.1436292400.650.21
88991,711130.090.013150.110.02
  • Rotifers were irradiated on ice for various times with a 137Cs source delivering 140 Gy per h. Parental and F1 relative fecundity and relative fertility are defined in Materials and Methods. The number of daughters transferred to new wells was in each case equal to the number of parental wells in which daughters were produced. For E. dilatata the number of hatched eggs was counted directly. For bdelloids it was taken as the number of progeny, as described in Materials and Methods.