Background: Effect of feeding with different levels of sunflower seeds on Reproduction system in laying hens Materials and Methods: A total of 160 white Bovens hens at 30 weeks of age were housed in cages in an open-sided building under a 16 h light: 8 h dark lighting schedule. Birds were randomly divided into four treatments and were fed, ad libitum, diets containing 0% 6% and 9% sunflower see...

The sound reproduction system based on the boundary surface control principle makes possible a physically close sound reproduction and has a high performance of spatial reproduction such as sound localization and sound distance. Based on these features, we have researched and developed a 3-D sound field sharing system in order to make possible a deeper level of telecommunication through music. ...

The purpose of this paper is to describe a two dimensional growth model with sexual reproduction (i.e. two particles are needed to produce a new one) and contrast its properties with those of a similar model with asexual reproduction (i.e. an additive process in the sense of Harris (1978) and Griffeath (1979)). The results reported here were obtained in collaboration with Larry Gray. Detailed p...

One major advantage of sexual reproduction over asexual reproduction is its promotion of genetic variation, although it reduces the genetic contribution to offspring. Queens of social insects double their contribution to the gene pool, while overuse of asexual reproduction may reduce the ability of the colony to adapt to environmental stress because of the loss of genetic diversity. Recent stud...

the present study was aimed to investigate the effect of fluoxetine on aggressive behaviors towards female and testosterone concentration of male fighting fish (betta splendens) during one reproduction event. male specimens were exposed 6 days to concentrations of 0 (control treatment) and 0.54 µg/l fluoxetine (exposed treatment) and aggressive behaviors of them assessed on different reproducti...