Table 2.

Mass percentage, mean, and standard error of different elements on the external surface of the cuticle in the antenna, rostrum, and spear-like shape of the scaphocerite in Marsupenaeus japonicus

	Antenna	Rostrum	Spear-like shape of Scaphocerite
C	30.43 ± 0.22	28.68 ± 0.23	29.01 ± 0.27
N	12.82 ± 0.39	11.46 ± 0.41	13.42 ± 0.53
O	39.38 ± 0.48	40.44 ± 0.54	36.82 ± 0.63
P	6.66 ± 0.10	6.68 ± 0.11	7.50 ± 0.14
Ca	9.33 ± 0.13	12.74 ± 0.17	13.25 ± 0.20
Na	0.41 ± 0.04
Mg	0.73 ± 0.04
Al	0.24 ± 0.03