Body size and spine length at each temperature are shown in Table 3. Four measured
characteristics (body length, body width, antero-median spine length and antero-lateral spine
length) of SS and LS clones were not affected by temperature (P > 0.05). Only the posterior
spine length of the SS was influenced by temperature (P < 0.05) and there was a highly
significant, negative correlation between posterior spine length and temperature (r = –0.791,
P < 0.01). All offspring of the SS produce posterior spines at 20 and 25 °C with an average
length of 19.8 ± 6.6 and 11.9 ± 2.6 μm, respectively. This spine was present from the first
to the sixth generation and the length of the posterior spine of different generations was
not significantly different (P > 0.05)