Abstract: The invention relates to a device (100) for the individualized monitoring of the feed conversion ratio of poultry comprising: a weighing station (30) comprising side walls and a front wall defining an available internal volume able to contain a bird, a bird identification means (40), able to identify one bird positioned in the available internal volume of the weighing station (30) and to provide identification information of the bird, a bird weighing means (10), able to measure the weight of one bird positioned in the available internal volume of the weighing station (30) and to provide weight information of the bird, a feeder (50) containing poultry feed, coupled to a feed weighing means (20) able to measure the weight of the feed contained in the feeder (50) and to provide weight information of the feed, wherein said feeder (50) comprises a dispensing area (51), wherein said dispensing area (51) is accessible only to one bird positioned in the available internal volume of the weighing station (30), and a

Abstract: Spine fixation instrumentation including a rod and lateral mass screws which can be fixed at any of a range of orientations relative to the rod. Connectors are used to couple the rod and the screws. Sleeves are wedged between yokes on the one hand and the rod or shafts on the other hand. The sleeves are assembled and disassembled by instruments similar to pliers.