Some aspects of the reproductive biology of Cobitis keyvani (Mousavi-Sabet, Yerli, Vatandoust, Ozeren and Moradkhani, 2012), an endemic Loach fish species from the Talar River in the southern Caspian Sea basin, in north of Iran was studied by regular monthly collections throughout a year. Fecundity, condition factor, gonado-somatic, modified gonado-somatic and Dobriyal indices were es...

Mature cystic teratomas (dermoid cysts) are benign tumors found in a variety of locations including the gonads, central nervous system, head and neck and retro peritoneum. They develop from totipotent germ cells and can give rise to a diverse array of mature tissue types resulting in the frequent finding of structures such as hair, bone, teeth, fat and neural tissue. Dermoid cysts of the ovary ...

The ill effects of carotid artery occlusion or ligation vary in man and experimental animals according to surgical techniques, environmental conditions, diet, stress, sex, age, strain of the animal, blood pressure, the state of cardiopulmonary system, and other diverse factors. Unilateral carotid artery ligation in most small laboratory animals is an innocuous procedure. The gerbil, a desert ra...

Gonads were removed from fetal mice at about the time that gonadal sex differentiation occurs. The gonads were cultured in vitro with or without their mesonephric tissue. When gonads and ducts removed from sexually undifferentiated fetuses were cultured together, the gonads of both sexes developed female characteristics, whereas gonads cultured without mesonephros developed according to the sex...

The development stages of male and female gonads in the freshwater crab Sylviocarcinus pictus (H. Milne Eduards, 1853) were described through macroscopic and microscopic (histology) examinations. The histological description was based on 40 specimens (20 each sex). Four gonadal development stages were found for females: immature, ripening, mature and spawned. The following female cells were fou...

Teratoma is the most commonly encountered germ cell tumour among the most common ovarian tumours; however, teratomas of the omentum and mesentery are extremely rare. They are usually asymptomatic or can produce compressive symptoms. The imaging features are suggestive. The present report describes such a case of primary omental teratoma encountered in a young patient, which was managed by surgi...

In mammals, the specification of GC begins during cleavage; GC first appears near the gut and further migrates to the developing gonads. The lineage of GC is called germ line. They are unique cells, which undergo cell division of two types, mitosis and meiosis, in contrast to somatic cells of mammal’s body, which only divide by mitosis. Accordingly to Fig. 2 following further differentiation GC...

Reproductive parameters evaluation is considered as helpful tool for gene bank formation in ecological and economically important animals species. Gloydius halys caucasicus is venomous, viviparous pit viper of northwest of Iran. In this research, the spermatic reproductive parameters of this taxon were studied. Twenty six male snakes were collected from Takht-e-Soleiman region between September...

Abstract Mangrove forests along the vast coast of West Papua serve as habitat for mud crabs, which are high-value economic resources marketed to various regions in Indonesia. However, intensive utilization impacts sustainability mangrove crab populations, especially orange crabs ( Scylla olivacea ). Exploitation studies need be conducted further use manage resources. This study was six months, ...