نتایج جستجو برای: domestic pigeons
تعداد نتایج: 71196 فیلتر نتایج به سال:
Pigeons, unlike rats, do not display very accurate spatial working memory when tested in the traditional radial arm maze apparatus unless they are given special and extended training (cf. Roberts & Van Veldhuizen, 1985). One possible reason for their apparent "unpreparedness" to display spatial memory abilities in radial arm mazes is that, in the wild, pigeons tend to feed in open-field environ...
The potential role of rock pigeons (Columba livia) in the epidemiology of shiga toxin-producing Escherichia coli (STEC) and Salmonella enterica is unclear. Our objective was to determine the prevalence of STEC and S. enterica in pigeons at urban and dairy settings as a function of season. Prevalence of STEC and S. enterica was estimated by bacteriologic culture of cloacal swabs collected from p...
Flying animals must successfully contend with obstacles in their natural environments. Inspired by the robust manoeuvring abilities of flying animals, unmanned aerial systems are being developed and tested to improve flight control through cluttered environments. We previously examined steering strategies that pigeons adopt to fly through an array of vertical obstacles (VOs). Modelling VO fligh...
Highly pathogenic avian influenza virus (HPAIV) of the H5N1 subtype has been reported to infect pigeons asymptomatically or induce mild symptoms. However, host immune responses of pigeons inoculated with HPAIVs have not been well documented. To assess host responses of pigeons against HPAIV infection, we compared lethality, viral distribution and mRNA expression of immune related genes of pigeo...
This research presents computational models to represent visual navigation mechanisms which guide pigeons (Columba Livia) during flight. A 3D graphics computer simulator was developed to model autonomous flight in virtual pigeons. The aim was to investigate the role of (i) visual landmarks (ii) flocking with other pigeons and (iii) image familiarity in pigeon navigation. A recursive processing ...
Objective- Because of the several differences between avian and mammalian physiology and anatomy, avian anesthesia requires to be more attentive. The aim of this study was to determine a safe injectable anesthetic agent that had more compatibility with the avian features. Design- Experimental study Animals- Twelve male pigeons...
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