TABLE 2.

Progress of ossification: Length of the cartilaginous part and percentage of animals with fully ossified keel bones.

	Week 8	Week 10	Week 15	Week 19	Week 23
Ø Length of the cartilaginous part of the keel bone [cm]	0.53 ± 0.18	0.08 ± 0.11	0.01 ± 0.03	0	0
Ø Relative length of the cartilaginous part of the complete keel bone [%]	9.3 ± 3.2	1.4 ± 2	0.1 ± 0.6	0	0
Minimum length of the cartilaginous part of the keel bone [cm]	0	0	0	0	0
Maximum length of the cartilaginous part of the keel bone [cm]	0.89	0.36	0.17	0	0
Percentage of animals with fully ossified keel bones [%]	5.9	63	95.3	100	100