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E Norris

Publications and source records attributed to E Norris.

23 records · Page 2Linked to original sources

Regulation and grinding ability of grit in the gizzard of Norwegian willow ptarmigan (Lagopus lagopus).

Fluctuations in grit composition in the gizzards of willow ptarmigans and the grinding ability of various grit assortments from wild ptarmigans were examined. We confirmed reports of other investigators that larger, fewer and rounder stones were present in the winter than in the autumn. Experiments showed that ptarmigans prefer stones with diameters between 2-5 mm. Birds on a constant diet maintained a constant stone intake throughout the year. The composition of gizzard grit was influenced by the availability of stones as well as of the type of food the ptarmigans ate. Using an artificial gizzard, grit from birds shot during the autumn was found to be a more efficient grinding material than grit from winter birds. We suggest that other functions than grinding, such as supplying minerals, may be equally important functions of the grit.

Animals↗

Care of the paediatric day-surgery patient.

Paediatric day surgery minimizes the length of the hospital stay and therefore is less traumatic for both child and parents. This is only true if the day-surgery process encompasses parental participation in care, good communication and a planned discharge process.

Ambulatory Surgical Procedures↗