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Table 1 Eggshell quality measurements from hens after estradiol 3-benzoate or placebo treatment

From: Exogenous estradiol improves shell strength in laying hens at the end of the laying period

 

Lohmann Selected Leghorn (LSL)

Lohmann Brown (LB)

Placebo

Estradiol

P value

Placebo

Estradiol

P value

(n = 2)

(n = 2)

(n = 2)

(n = 2)

Egg weight (g)

65.9 ± 0.35

65.6 ± 0.46

n.s

67.0 ± 0.50

66.3 ± 0.37

n.s

Shell Deformation (μm)

74 ± 0.9

73 ± 0.9

n.s

74 ± 1.2

69 ± 0.7

0.0002

Shell breaking strength (g)

4077 ± 71

4026 ± 58

n.s

4263 ± 79

4388 ± 71

n.s

Shell weight (g)*

5.94 ± 0.04

5.96 ± 0.04

n.s

6.09 ± 0.04

6.38 ± 0.04

<0.0001

Shell thickness incl membrane (mm)*

0.386 ± 0.002

0.390 ± 0.002

0.0749

0.400 ± 0.002

0.409 ± 0.002

0.0014

Shell thickness excl membrane (mm)*

0.357 ± 0.002

0.362 ± 0.002

0.0373

0.372 ± 0.002

0.378 ± 0.002

0.0415

  1. Eggshell quality of eggs from Lohmann Selected Leghorn (LSL) and Lohmann Brown (LB) hens treated with estradiol 3-benzoate or a placebo pellet at the end of the laying period. Values are expressed as mean ± SE.
  2. *Egg weight was included as a covariate in the analysis of shell weight and shell weight was included as a covariate in the analysis of shell thickness, these values are expressed as LSmean ± SE.