Histology of A. eschrichtii males and female gonads.

a) –18 mm male testis; b)– 21 mm male testis; c)– 26 mm male testis; d)–ovary of 15 mm female at stage F0; e)– 22 mm female at stage F0 and; f)– 32 mm female at stage FIV; Spc–spermatocytes, Spt–spermatids, Spz–spermatozoa in spermatophore, Pvo–previtellogenic oocytes, Vo–vitellogenic oocytes (scale = 100 μm).