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Table 2 Feature of the ovarian area 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 Types of cells present in the ovary Cell diameter (μm) Nuclear diameter (μm) Cytoplasm Nucleus Follicle related structures
October-March Oogonia 16.2 ± 0.3 9.3 ± 0.2 Slightly basophilic A nucleolus  
  Pre-perinucleolar oocytes 35.0 ± 0.8 18.0 ± 0.4 Highly basophilic Two or three centrally located nucleoli  
April-July Early perinucleolar oocytes 57.6 ± 1.0 29.6 ± 0.6 Highly basophilic Numerous nucleoli  
  Late perinucleolar oocytes 84.1 ± 3.3 46.9 ± 2.0 Highly basophilic Numerous nucleoli close to the nuclear envelope Granulosa
  Vitellogenic oocytes at yolk vesicle stage (cortical alveoli stage) * 96.2 ± 2.6 51.0 ± 2.1 Weak basophilic
Granules randomly distributed
Numerous nucleoli close to the nuclear envelope Granulosa
Zone radiate
  1. * In April-July also appeared the germ cell types present in the ovary in October-March