Reproductive Biology and Fishery-Related Characteristics of the Malabar Grouper (Epinephelus malabaricus) Caught in the Coastal Waters of Mafia Island, Tanzania

Table 2

Monthly frequency and average length (cm) for Epinephelus malabaricus according to maturity stages. F1 and F2 are not included in female (F) : male (M) ratio. See Table 1 for descriptions of F1–F6 and M2–M5.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	𝑁	Mean length (cm)	SD	Min	Max	% of the total
F1	6	5	10	2	4	9	2	3	7	13	15	6	82	57.8	11.2	25	79	47.7
F2	2	2	1	1	0	0	0	0	1	3	2	1	13	69.8	8	59	79	7.6
F3	2	0	0	0	2	1	0	0	1	2	2	0	10	76.8	4.7	73	88	5.8
F4	4	1	0	0	0	0	1	0	1	3	2	2	14	82.9	6.7	71	90	8.1
F5	1	1	0	0	0	0	0	0	0	1	1	4	8	87.4	7.1	76	97	4.7
F6	0	0	0	0	0	0	0	0	2	1	3	3	9	89.1	11.1	80	113	5.2
M2	7	5	0	0	0	0	0	0	1	0	0	12	25	101.2	3.4	97	108.5	14.5
M3	2	0	0	0	0	0	0	0	0	0	0	1	3	104.8	3.4	102.8	108.7	1.7
M4	0	1	0	0	0	0	0	0	2	2	0	1	6	106.5	6.9	101	114	2.9
M5	0	0	0	0	0	0	0	0	0	0	0	2	2	111.7	1	110.6	112.3	1.7
F : M	1 : 1.3	1 : 3	—	—	2 : 0	1 : 0	1 : 0	—	1.3 : 1	3.5 : 1	8 : 0	1 : 1.8	1.1 : 1