Eusocial insect colonies are defined by extreme variation in reproductive activity among castes, but the ancestral conditions from which this variation arose are unknown. Investigating the factors that contribute to variation in reproductive physiology among solitary insects that are closely related to social species can help to fill this gap. We experimentally tested the role of nutrition, juv...

The distribution of the activity of seven acid glycosidases in the reproductive organs of the pheasant (Phasianus colchicus) was studied. The study was carried out on seven mature birds at the age of 11 months during the reproductive season (May). Significant (p<0.01) differences in acid glycosidase activity dependent on enzyme origin were observed. Generally, the highest activity of acid glyco...

Xanthine oxidase plays crucial roles in the production of reactive oxygen species (ROS), and uric acid in blood which may lead to gout, one of the oldest known forms of arthritis amongst humans. Summer savory (Satureja hortensis L.) a medicinal/spice exhibits antioxidant activity, but unknown effects on xanthine oxidase activity. Here, for the first time, we examined the effects of S. hortensis...

1 Department of Reproductive Immunology and Pathology, Institute of Animal Reproduction and Food Research of PAS, 10-748 Olsztyn, Poland 2Department of Morphology and Function, Faculty of Veterinary Medicine, University of Lisbon, 1300-477 Lisbon, Portugal 3 Laboratory of Reproductive Immunology, Department of Experimental Therapy, Institute of Immunology and Experimental Therapy of PAS, 53-114...

Reproductive efficiency in dairy cattle has been decreased over the last 5 decades despite significant gains in genetic selection, improved reproductive technologies and nutritional care. In high-yielding dairy cattle, the negative energy balance (NEB) during the first week post-partum adversely affects ovarian activity, mainly follicle growth and steroidogenesis. Circulating levels of non-este...

shirbot ( barbus grypus ) is one of the species in south and southwest of iran which is greatly favorable to residents of the region. unfavorable ecological conditions in habitat of this species and overfishing have led to the reduction of the population of shirbot. therefore, to restore the natural stock of this species, identifying its reproductive cycle associated with its habitat is of a gr...