. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 136 DANIEL S. GROSCH AND ROBERT L. SULLIVAN treatment, five days should be subtracted from each value. It is evident from the data obtained that longevity of wasps was not influenced significantly by internal ft radiation over the range investigated. In fact, the experimentals show higher mean survival time than the corresponding controls in five out of the nine experiments. In the distribution and range of values which make up the array from which mean sur- vival time is calculated, examples of both treated and non-treated
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 136 DANIEL S. GROSCH AND ROBERT L. SULLIVAN treatment, five days should be subtracted from each value. It is evident from the data obtained that longevity of wasps was not influenced significantly by internal ft radiation over the range investigated. In fact, the experimentals show higher mean survival time than the corresponding controls in five out of the nine experiments. In the distribution and range of values which make up the array from which mean sur- vival time is calculated, examples of both treated and non-treated wasps were ob- tained in the long-lived category of 40 days after the honey feeding. Typically, at. FIGURE 5. Survival curves obtained by plotting the percentage of hatched eggs against the radioactivity of the mixture ingested. The results for the first day of egg laying are designated by ovals. The corresponding curve is drawn of alternating horizontal and vertical dashes. The results for the period comprising the second to fourth day are designated by x marks and the curve is drawn using short dashes. The results of the period comprising the fifth to ninth day are designated with triangles and the curve is drawn using long dashes. The arrows mark the possible range of dosage for the initial experiment when pipetted measurement was attempted. least three to six animals were alive after 30 days of experimental observation. Such longevity was spectacular in experiments in which egg production was halted five to eight days after treatment, yet the sterilized females remained alive for weeks after laying their last egg. A more comprehensive investigation into what appears to be remarkable radio-resistance by adult braconids is in progress. DISCUSSION Interpretation of the above results is difficult because we have not been able to find comparable studies with the day-to-day life-time approach. In general the. Please note that these images are extracted from scanned page images th
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