NPIP-mandated serological screening of a multiplier breeder flock detected possible Mycoplasma gallisepticum (MG) exposure. The flock was quarantined and further samples including blood and choanal swabs were collected and sent to a research facility for independent testing and confirmation. Subsequent analyses included diagnosis by Serum Plate Agglutination (SPA), MG-specific Polymerase Chain ...

This case study presents a female aged 54 yrs with a 12 months history of progressive pulmonary impairment after a 7-yr period of occupational exposure to rotary-cut polyethylene. An open lung biopsy revealed the histopathology of follicular bronchiolitis that is viewed as a stereotypical feature for flock worker's lung. It seems to be the first case of plastic flock-associated interstitial lun...

We study a one-dimensional lattice flocking model incorporating all three of the flocking criteria proposed by Reynolds [Computer Graphics 21, 4 (1987)]: alignment, centering, and separation. The model generalizes that introduced by O. J. O'Loan and M. R. Evans [J. Phys. A. 32, L99 (1999)]. We motivate the dynamical rules by microscopic sampling considerations. The model exhibits various flocki...

This paper explores the differential impact of multi-agent system heterogeneity in context an idealised herding task. In simulation, a team simple herders must move flock towards target location continuous 2d space. Flock is controlled by dividing into number non-overlapping social groups that influence sheep movement. Results demonstrate increasing (i.e., different groups) reduces performance ...

The number of lambs sold per ewe mated in the breeding flock has a considerable impact on sheep operation profitability. This depends primarily on fertility, prolificacy (# of lambs), and lamb survival, mothering ability, milk production of the ewe and lamb growth rate. Optimal reproduction does vary by environment and management system – some sheep operations don’t want a lambing rate over 200...

Fleece rot and footrot are two bacterial skin diseases of potential significance in sheep. Both diseases are associated with sheep production in high rainfall-environments. Meece rot is currently the most efficient indicator trait known for genetic improvement in resistance to body strike. Exploitation of genetic variation in resistance to fleece rot is feasible through selection of sheep withi...

A Mycoplasma synoviae (MS)-free flock of broiler breeders was housed for brooding and rearing on an MS endemic farm. PCR revealed that the flock became infected within nine weeks. At 22 weeks the flock was transferred to a clean and disinfected house on a previously depopulated farm. The birds were then subjected to three treatments with fluoroquinolones due to recurrent Escherichia coli perito...

While techniques exist for simulating group behaviors, these methods usually only provide simplistic navigation and planning capabilities. In this work, we explore the benefits of integrating roadmap-based path planning methods with flocking techniques. We show how group behaviors such as exploring can be facilitated by using dynamic roadmaps (e.g., modifying edge weights) as an implicit means ...

Pyrotechnics have long been used to frighten birds from specific areas but birds might habituate to them. Anecdotal and limited published reports suggest that killing a flock member can reduce habituation. However, little behavioral work has been conducted in this area. We exposed brown-headed cowbirds (Molothrus ater) to noise from either 0.22 caliber blanks or 15-mm pyrotechnics in a series o...

INTRODUCTION. .......... ....................................................... Historical. ..................................................................... Materials and methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Analysis of data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....