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Table 2 Average heartbeat measured at 15°C and 26°C in st.24 and st.34 medaka embryos of the Hd-rR and ODT strains

From: Regular heartbeat rhythm at the heartbeat initiation stage is essential for normal cardiogenesis at low temperature

Developmental stage

Heart rate (mean ± SD)

Hd-rR strain

ODT strain

15°C

26°C

15°C

26°C

st.24

9.08 ± 1.66

24.0 ± 4.43

8.78 ± 2.67

21.1 ± 3.93

st.34

70.7 ± 3.21

116.0 ± 10.6*

67.3 ± 2.31

116.9 ± 6.44

  1. Average heart rate (bpm) at st.24 and st.34 recorded 3 h after the onset of the 15°C treatment (15°C, n = 3 each) in the Hd-rR and ODT strains. Control embryos were incubated at 26°C (n = 3; n = 26 at st.34). The asterisk indicates the same data as presented in Table 1.
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BMC Developmental Biology

ISSN: 1471-213X

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