Table 1.
Sex ratio with shell size of Sinonovacula constricta

Shell length(mm)	Number			Sex ratio		χ2	P-value
	Total	Female	Male	F/F+M	F:M
≤30.0	4	1	3	0.25	1:3.00	1.000	0.317
30.1-40.0	17	5	12	0.29	1:2.40	2.882	0.090
40.1-50.0	10	3	7	0.30	1:2.33	1.600	0.206
50.1-60.0	23	9	14	0.39	1:1.56	1.087	0.297
60.1-70.0	26	12	14	0.46	1:1.17	0.154	0.695
70.1-80.0	14	8	6	0.57	1:0.75	0.286	0.593
80.1≤	6	3	3	0.50	1:1.00	0.000	1.000
Total	100	41	59	0.41	1:1.44	3.240	0.072