. Bulletin. Natural history; Natural history. September, 1967 Childers: Hybridization of Sunfishes 177 Fig. 1 .—Red-ear sunfish fry I above I and WR F, hy- brid fry (below) selected to show the range of morpho- logical deformities of the hy- brid fry. All fry were pro- duced from eggs from one female red-ear sunfish. Both kinds of zygotes were al- lowed to develop simultane- ously under similar condi- tions for 120 hours before being sacrificed. The mean hourly temperature was ° C. (° F.), stand- ard deviation, ° C. (° F.).. any of these fry would have become free swimming. Fif
. Bulletin. Natural history; Natural history. September, 1967 Childers: Hybridization of Sunfishes 177 Fig. 1 .—Red-ear sunfish fry I above I and WR F, hy- brid fry (below) selected to show the range of morpho- logical deformities of the hy- brid fry. All fry were pro- duced from eggs from one female red-ear sunfish. Both kinds of zygotes were al- lowed to develop simultane- ously under similar condi- tions for 120 hours before being sacrificed. The mean hourly temperature was ° C. (° F.), stand- ard deviation, ° C. (° F.).. any of these fry would have become free swimming. Fifty-five percent of the \VG hybrid and 75 percent of the pure green sunfish zygotes developed into normal-appearing swim-up fry (differ- ence significant to level). The WG hybrid swim-up fry appeared to be behaviorally nonnal. The remaining nine kinds of hybrids were not sig- nificantly different from their maternal parent species in the percentages that developed into normal swim-up fr>'. The mean hatching time and stand- ard deviation were calculated for each of the 132 samples of eggs in the 11 experiments (Tables A14-A24 of the ). A statistical weight was calculated for the mean hatching time of each sample by dividing the number of eggs that hatched by the variance of the mean hatching time. A 7094 digital computer was used in the analysis of variance of these data. Tlie statistical analysis, in which the weigjited mean hatching time of each kind of hybrid was compared with that. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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