The Company of Biologists

Table 1.

Progression of fusion in wild-type embryos, from 15 somites to 48 hpf

Stage	Total fibres	Total nuclei	Number of embryos	Mean of embryo means^{^*}
15 somites	113	113	6	1
20 somites	269	301	14	1.19
22 somites	225	400	7	1.73
24 hpf	384	929	12	2.48
26-28 hpf	2531	6730	77	2.63
30 hpf	709	1954	22	2.81
34 hpf	443	1156	12	2.71
48 hpf	130	419	8	3.23

Stage	Total fibres	Total nuclei	Number of embryos	Mean of embryo means^{^*}
15 somites	113	113	6	1
20 somites	269	301	14	1.19
22 somites	225	400	7	1.73
24 hpf	384	929	12	2.48
26-28 hpf	2531	6730	77	2.63
30 hpf	709	1954	22	2.81
34 hpf	443	1156	12	2.71
48 hpf	130	419	8	3.23

Mean nuclei/fibre for each embryo used as sample values, to weight each embryo equally, n=number of embryos. hpf, hours postfertilisation.