Key criteria included the presence of oogonia and primitive testicular tissue in the gonads
of bisexual juveniles, the presence of brown body atretic structures in testes of mature sex-changed males as evidence of prior female function, and the occurrence of transitional individuals whose gonads
contained both developing male and regressing female tissue types (Sadovy de Mitcheson and Liu, 2008).
Serial sections of female gonads
were used to analyze the relative density of ovarian structures.
Oocyte diameter and histological examination in the gonads
of Cerastoderma glaucum showed a reproductive strategy that follows a polycyclic pattern with successive spawning periods.
This special characteristic, and the possibility of self-fertilization, have encouraged detailed studies of the gonad
structure of the genus Serranus (Atz, 1965; Fishelson, 1970; Reinboth, 1970; Febvre et al.
Concentrations of DDE were always greater than those of DDD and DDT in both livers and gonads
gigas, Ostrea edulis are also predominantly hermaphrodites, with the presence of both male and female gonad
within each individual and the ability to change sex several times during a breeding season.
Worms were not detected in the gonads
of male fish.
001); greater numbers of oysters with undifferentiated gonads
(30%) and a green mantle (66.
There are no published reports on the histological staging of channeled or knobbed whelk gonads
Staff at SMileS raised pounds 150 for the trust by taking part in Tinsel Tuesday - when people wear fanc dress to raise cash for the trust's Gonads
Soder  in a study on gonadal development in humans have indicated that the macroscopic sexual differentiation until 42 days embryo is not visible in human and gonads
in human are located in the ventromedial part of mesonephros.
In mammals, sex chromosomes (XX in female, XY in male) determine the future sex of the animal during embryonic development by establishing whether the gonads
will become testes or ovaries.
OBJECTIVES: Using our previously developed organ culture system, we investigated the effects of cadmium chloride on human gonads
at the beginning of fetal life, a critical stage in the development of reproductive function.
metamorphic timing), size and developmental status of gonads
What sea creature has gonads
that are a prized delicacy in Europe and the Far East?