The aggressive behaviour of female hamsters was studied while they were housed in large enclosures with males and in brief tests with males or females. Some females are not aggressive with any male, whereas others are very aggressive toward all males in both testing conditions. Females that are not aggressive toward intact males may be very aggressive toward castrated males or females. When the...

The oxytocin (OT) family of neuropeptides are known to modulate social behaviours and anxiety in mammals and birds. We investigated cell numbers and neural activity, assessed as Fos induction, within magnocellular and parvocellular populations of neurons producing the OT homologue mesotocin (MT, Ile(8)-oxytocin). This was conducted within the male brown anole lizard, Anolis sagrei, following ag...

URBANEK, R. P., AND T. A. BOOKHOUT. 1992. Nesting of Greater Sandhill Cranes on Seney National Wildlife Refuge, p. 161-167. In D. A. Wood [ed.], Proc. 1988 N. Am. Crane Workshop. Voss, K. S. 1977. Agonistic behavior of the Greater Sandhill Crane, p. 63-85. In R. D. Feldt, [ed.], Proc. Symp. on the eastern population of the Greater Sandhill Crane. Michigan City, Indiana. WALKINSHAw, L. H. 1949. ...

BACKGROUND The extent of social behaviour among reptiles is underappreciated. Two types of aggregations are recognized in lizards: ecological and social, i.e., related to the attraction to a site or to animals of the same species, respectively. As most lizards are territorial, aggregations increase the probability of aggressive interactions among individuals, a density-dependent behaviour. ME...

In male golden hamsters, agonistic behavior matures during puberty, changing from play fighting to adult-like aggression. In addition, this transition is accelerated by repeated social subjugation early in puberty. However, little is known about the development of agonistic behavior in females. In the present study, we compared the development of agonistic behavior in male and female golden ham...

Purpose: In prostate cancer, the anti-apoptotic mechanism of sulfated glycoprotein-2 (clusterin) against tumor necrosis factor-alpha (TNF-α) receptors and the action of type 2 TNF-α receptor (TNFR2) were investigated. Materials and Methods: TNF-α, agonistic-TNF type 1 receptor (TNFR1) antibody, agonistic-TNF-R2 antibody and their combination were treated in PC3 cell line with or without anti-cl...