Histological assessment of seasonal gonad maturation of red mullet (Mullus barbatus L., 1758) in Antalya Bay of Mediterranean in Turkey

Figures & data

Figure 1. Immature oocytes (H + E) Po: Primer oocytes; O: The small oocytes Oo: Oogonium Of: Ovarian folds.

Table 1. Annual frequency of gonadal developmental stages of female and male individuals of M. barbatus.

	Females							Males
Ages	0^+-VI^+	I^+-VI^+	I^+-V^+	I^+-VI^+	I^+-VI^+	I^+-VI^+	I^+-VI^+	0^+-VI^+	I^+-VI^+	I^+-VI^+	I^+-VI^+	I^+-VI^+	Total
Stages/Months	Immature	Chromatin-nucleolus	Peri nucleolar	Cortical alveoli	Vitello genesis	Maturity	Post-ovulation	Spermatogenesis	Spermiogenesis	Spermiation	Sperm release	Resting
January	n = 9 %14,52	n = 14 %22,58	n = 12 %19,35					n = 13 %20,97	n = 9 %14,52			n = 5 %8,06	62 %100
February	n = 8 %12,12	n = 11 %16,66	n = 14 %21,21	n = 1 %1,52				n = 9 %13,64	n = 14 %21,21	n = 9 %13,64			66 %100
March	n = 4 %6,56	n = 7 %11,49	n = 8 %13,11	n = 8 %13,11	n = 4 %6,56			n = 6 %9,84	n = 11 %18,03	n = 9 %14,74	n = 4 %6,56		61 %100
April	n = 2 %2,82	n = 5 %7,04	n = 7 %9,86	n = 12 %16,90	n = 10 %14,08	n = 4 %5,63		n = 3 %4,23	n = 7 %9,86	n = 14 %19,72	n = 7 %9,86		71 %100
May		n = 5 %4,95	n = 5 %4,95	n = 11 %10,89	n = 14 %13,86	n = 15 %14,85		n = 7 %6,93	n = 9 %8,91	n = 13 %12,87	n = 18 %17,82	n = 4 %3,96	101 %100
June		n = 3 %3,06	n = 4 %4,08	n = 9 %9,18	n = 7 %7,14	n = 11 %11,22	n = 11 %11,22	n = 5 %5,10	n = 10 %10,20	n = 13 %13,27	n = 16 %16,33	n = 9 %9,18	98 %100
July		n = 3 %3,00	n = 3 %3,00	n = 8 %8,00	n = 5 %5,00	n = 8 %8,00	n = 10 %10,00	n = 6 %6,00	n = 7 %7,00	n = 12 %12,00	n = 17 %17,00	21 %21,00	100 %100
August	n = 1 %1,18	n = 4 %4,71	n = 5 %5,88	n = 6 %7,06	n = 5 %5,88	n = 6 %7,06	n = 8 %9,41		n = 6 %7,06	n = 9 %10,59	n = 14 %16,47	n = 21 %24,70	85 %100
September	n = 8 %12,70				n = 4 %6,35	n = 5 %7,94	n = 15 %23,81	n = 3 %4,76		n = 6 %9,52	n = 8 %12,70	n = 14 %22,22	63 %100
October	n = 10 %16,67				n = 1 %1,67	n = 2 %3,33	n = 11 %18,33	n = 11 %18,33	n = 6 %10,00			n = 19 %31,67	60 %100
November	n = 11 %17,74	n = 7 %11,29	n = 2 %3,23				n = 3 %4,84	n = 18 %29,03	n = 11 %17,74			n = 10 %16,13	62 %100
December	n = 13 %21,31	n = 8 %13,11	n = 3 %4,92				n = 2 %3,28	n = 15 %24,59	n = 7 %11,48			n = 13 %21,31	61 %100
Total	66	67	63	55	50	51	60	96	97	85	84	116	890

Figure 2. Oocytes in chromatin-nucleolus stage in January (H + E).

Figure 3. Oocytes in Perinucleolus stage in March (H + E).

Figure 4. Cortical alveoli stage (H + E).

Figure 5. Vitellogenesis stage in May (MT).

Figure 6. Maturity stage in May (MT).

Figure 7. Post-ovulation stage in June (H + E) O: Oocyte N: Nucleus Nu: Nucleolus Op: Ooplasma Fe: Follicular epithelium cells V: Vacuole Ca: Cortical alveoli Cr: Corion Zr: Zona radiata Gv: Germinal vesicle Yg: Yolk globules Ysg: Egg yolk granules Af: Atretic follicle.

Figure 8. Spermatogenesis stage in December (H + E).

Figure 9. Development of spermatocytes and spermatids in May during the spermiogenesis stage (MS).

Figure 10. Spermiation stage in May (H + E).

Figure 11. Development spermatozoa in the sperm release stage (H + E).

Figure 12. Resting stage in December (H + E) Sg: Spermatogonia Spm: Spermatozoa Std: Spermatid PS: Primary spermatocyte SS: Secondary spermatocyte Tt: Testicular tubules.