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Table 2 Estimates of inter- and intra-cohort egg volume variation in H.asinina and systematic error

From: Variation in rates of early development in Haliotis asinina generate competent larvae of different ages

 

n

Mean diameter

(μm)

Std. dev.

(μm)

Min/Max

(μm)

Mean vol.

(μm3)

Std. Dev.

(μm3)

Std. Error 1

(μm3)

Systematic

error (%) 2

Cohort 1 measurement 1

46

136.0

4.2

120.0/144.4

1,321,897.9

117,418.7

 

35.6

Cohort 1 measurement 2

46

133.5

4.5

114.0/144.4

1,249,694.1

121,253.2

 

34.5

Cohort 1 measurement 3

46

133.5

4.2

117.2/141.1

1,249,108.2

112,218.9

41,857.1

37.3

Cohort 2 measurement 1

25

140.9

3.6

132.0/146.2

1,466,635.5

112,840.8

 

31.4

Cohort 2 measurement 2

25

138.9

2.9

132.0/144.8

1,404,027.4

88,846.1

 

39.9

Cohort 2 measurement 3

25

138.9

4.2

129.2/148.5

1,406,434.3

126,670.2

35,472.4

28.0

Cohort 3 measurement 1

27

138.0

4.7

129.7/147.6

1,381,673.6

142,105.0

 

15.8

Cohort 3 measurement 2

27

136.6

3.6

131.0/143.9

1,336,833.8

105,865.6

 

21.2

Cohort 3 measurement 3

27

137.3

4.7

126.4/146.2

1,360,755.8

136,909.9

22,436.7

16.4

  1. 1 The standard error is the standard deviation of sample means reported in column 6 (Mean vol.)
  2. 2 The systematic error is the fraction of the standard deviation accounted for by the standard error (i.e. the variation obtained by measuring the same eggs 3 times as a proportion of the estimated variation in egg volume). This was calculated as the Std. Error (column 8) divided by the Std. Dev. (column 7) expressed as a percentage. Note that these values can only be underestimates of the total systematic error, additional sources of error will inflate these values
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Frontiers in Zoology

ISSN: 1742-9994