منابع مشابه
Comparison of gizzard and intestinal microbiota of wild neotropical birds
Gut bacterial communities have been shown to be influenced by diet, host phylogeny and anatomy, but most of these studies have been done in captive animals. Here we compare the bacterial communities in the digestive tract of wild birds. We characterized the gizzard and intestinal microbiota among 8 wild Neotropical bird species, granivorous or frugivorous species of the orders Columbiformes and...
متن کاملextensions of some polynomial inequalities to the polar derivative
توسیع تعدادی از نامساوی های چند جمله ای در مشتق قطبی
15 صفحه اولWhy birds eat colourful grit: colour preferences revealed by the colour of gizzard stones.
Colour preferences from sexual or social contexts are assumed to have arisen owing to preferences for specific kinds of food, representing a sensory bias, but once colour preferences have evolved in a sexual context, they may also be expressed during foraging. We tested whether preferences for specific body colours (i.e. plumage and soft parts) were related to colour preferences for grit ingest...
متن کاملPrevalence and numbers of bacteria in broiler crop and gizzard contents.
Crops or gizzards in broiler carcasses are frequently damaged during processing. The contents from either organ, defined by the USDA Food Safety and Inspection Service as ingesta, may contaminate the carcass. Previous research has shown crop contents are a source of Salmonella contamination on processed carcasses, although less information is available on gizzard contents. The purpose of this s...
متن کاملBirds and Some Human Diseases
adult plumage. One would certainly expect that at least half of the individuals of an average flock in September and October would be birds of the year, and since all were in adult plumage, the postjuvenal molt must have been complete by that time for the particular flock observed. It therefore appears to me that the individual under consideration, No. 55-127606, is a bird from a rare second br...
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ژورنال
عنوان ژورنال: Nature
سال: 1882
ISSN: 0028-0836,1476-4687
DOI: 10.1038/026012a0