Diapositive 1 - de l'Université libre de Bruxelles
Diapositive 1 - de l'Université libre de Bruxelles
Diapositive 1 - de l'Université libre de Bruxelles
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Chapitre IIIbetween these different plates (p ANOVA repeated measures < 10 −5 ) (Table 11). The skeletalSr/Ca ratio was significantly <strong>de</strong>pen<strong>de</strong>nt on the size of the starfish (Sr/Ca = −0.0028 × size+ 2.6897; R 2 = 0.7812; p regression < 10 −6 ) (Figure 23). On the contrary, the size had nosignificant effect on the skeletal Mg/Ca ratio (p regression = 0.061) (mean ± S.D. = 104 ± 8; n= 92). Over this size range the 95% confi<strong>de</strong>nce interval (CI 95) was 87–120 mmol/mol.Table 11: Mg/Ca (mmol/mol) ratios in skeletal plates of Asterias rubens (mean ± standard<strong>de</strong>viation; n = 20). Values sharing the same superscript are not significantly different.Type of calcified tissue Mg/Ca (mmol/mol) Sr/Ca (mmol/mol)Skeleton bulk 112 ± 7 c 2.56 ± 0.04 cAdambulacral plates 113 ± 7 c 2.55 ± 0.04 cAdambulacral spines 106 ± 6 b 2.50 ± 0.04 aAmbulacral plates 96 ± 4 a 2.51 ± 0.04 bAboral plates 96 ± 4 a 2.51 ± 0.04 a,bUpper marginal plates 97 ± 3 a 2.53 ± 0.03 b2.75Skeletal Sr/Ca (mmol/mol)2.72.652.62.552.52.452.42.35y = -0.0028x + 2.6897R 2 = 0.7812; p
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