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<br />,1 <br />:.1 <br />, j <br />.., <br />i <br />.I <br /> 0 <br />" (~ <br />) N <br />, <br />, ,~ <br /> ,.;:. <br />" '-0 <br />, <br />,! <br /> <br />Eggs and larvae <br /> <br />Selenium concentrations in eggs and newly hatched larvae produced by females exposed <br /> <br />to the two selenium-fortified diets were 2.9-504 times higher than those in muscle plugs of the <br /> <br />female parent at day 153 of exposure (Table 12). In contrast, selenium concentrations in eggs <br /> <br />and larvae from females exposed to the control diets were only {,5-2.3 times higher than those in <br /> <br />muscle plugs at day 153. Selenium concentrations in I-day posthatch (dph) larvae were <br /> <br />significantly higher than those in eggs (paired T-test, T=4.08, P<O.OI, n=8), but the magnitude of <br /> <br />difference was small (I.I-IA fold). <br /> <br />Whole-body selenium concentrations in larvae decreased progressively with age and the <br /> <br />magnitude of reduction in selenium concentrations in 16- and 30-dph larvae was correlated with <br /> <br />selenium concentrations in newly hatched larvae (r=0.892 and 0.850, P=0.02, n=6 and 7, <br /> <br />respectively). Whole-body selenium concentrations in larvae with the highest residues at hatch <br /> <br />(l3.35-13AO i-1g!g) were reduced by 75-76% after 30 days (3.20-3.30 i-1g/g); whereas larvae with <br /> <br />the lowest residues at hatch (2.75 i-1g!g) were only reduced by 20% after 30 days (2.20 flg/g). <br /> <br />Whole-body selenium concentrations in 30-dph larvae were within 22% of that in brine shrimp <br /> <br />nauplii (2.7 i-1g/g selenium). <br /> <br />There were no significant correlations between selenium residues in eggs and hatchability <br /> <br />i,; and deformed larvae or between selenium residues in I-dph larvae and survival to swim-up and <br /> <br />growth after 30 days. Overall survival was not correlated with selenium residues in eggs or <br /> <br />I-dph larvae. However, survival of larvae at 10 and 30 days was inversely correlated with their <br /> <br />whole-body selenium residues at I dph (r=-0.784 and -0.726, P=0.02 and 0.04, n=8). The <br /> <br />biological significance of these correlations is doubtful because of the small sample size (n=8) <br /> <br />and the fact that one group oflarvae with the second highest selenium residues at hatch (13.35 <br /> <br />47 <br />