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Table 4 Parameters related with the development of the gonad of gilthead seabream during the second reproductive cycle.

From: Testicular involution prior to sex change in gilthead seabream is characterized by a decrease in DMRT1 gene expression and by massive leukocyte infiltration

Months Testicular stages Ovarian stages GSI
(%)
Ovarian ratio
(%)
Ovarian cell diameter means
(μm)
Ovarian nuclear diameter means
(μm)
Acidophilic granulocytes
(%)
October- January Spermatogenesis Immature From 1.4 ± 0.2 to 3.7 ± 1.0 and then to 1.8 ± 0.8 From 44.55 ± 15.06 to 9.52 ± 5.11 32.2 ± 1.7 16.62 ± 0.90 No detected
February Spawning Immature 1.3 ± 0.4 46.45 ± 3.26 37.3 ± 1.8 19.54 ± 0.91 4.79 ± 0.96
March Post-spawning Immature 0.52 ± 0.04 66.26 ± 3.71 39.6 ± 1.8 21.93 ± 0.99 1.12 ± 0.24
April-July Testicular involution Growth: vitellogenic oocytes in yolk vesicles stage 0.41 ± 0.05 From 74.43 ± 10.78 to 88.50 ± 4.20 51.5 ± 1.8 26.82 ± 0.98 From 8.76 ± 1.24 to 3.69 ± 0.67 reaching the maximum value in may (9.25 ± 1.23)