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Table 1 Characteristics (mean ± SE) of breeding females from mainland and island populations.

From: Island selection on mammalian life-histories: genetic differentiation in offspring size

 

island (n = 51)

mainland (n = 33)

Fndf, ddf

p-value

Body mass of offspring (g)

1.85 ± 0.01

1.74 ± 0.02

4.541,23.3

0.044

Litter size

5.0 ± 0.2

5.6 ± 0.3

3.091,82

0.083

Litter mass (g)

9.25 ± 0.37

9.74 ± 0.44

0.8131,80

0.370

Reproductive effort (1)

0.76 ± 0.03

0.81 ± 0.04

1.201,82

0.277

Reproductive effort (2)

0.40 ± 0.02

0.42 ± 0.2

1.201,29.1

0.392

Post-partum head width of mother (mm)

13.2 ± 0.1

13.3 ± 0.1

0.401,33.9

0.529

Post-partum body mass of mother (g)

23.2 ± 0.4

23.2 ± 0.4

0.021,32.1

0.896

  1. Only the test statistics of origin are presented from the mixed model analyses (SPSS 14.0). Origin of mother was used as a fixed factor and population as a random factor in the analyses. Mother was also used as a random factor in the analysis of offspring body mass. Reproductive effort (1) = L × M o 0.75/M m 0.75, and Reproductive effort (2) = L × M o /Mm; where L is litter size; M o is mean pup mass at birth, and M m is weight of the female after delivery. ndf = numerator degrees of freedom, ddf = denominator degrees of freedom.
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BMC Ecology and Evolution

ISSN: 2730-7182

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