Table 3. Chi-square analyses to test for significant differences in gender distribution of Pelagia noctiluca.

	Male	Female	Sum	Expected Values	X2
January	76	72	148	74	0.05
February	38	25	63	31.5	1.34
March	18	5	23	11.5	3.67
April	55	38	93	46.5	1.55
May	34	22	56	28	1.29
June	28	11	39	19.5	3.71
July	31	30	61	30.5	0.01
August	40	36	76	38	0.11
September	56	20	76	38	* 8.52
October	61	61	122	61	0.00
November	75	84	159	79.5	0.25
December	71	67	138	69	0.06
Annual	583	471	1054	527	* 5.95

(X² _(0.05) = 3.84). Asterisk (*) marks significant difference.