Emu Dromaius novaehollandiae
تعريف
The emu is Australia's largest bird and is farmed commercially alongside the ostrich, kept in open outdoor pens for meat, hide and above all fat, which is rendered into emu oil for cosmetic and therapeutic use. Birds are typically slaughtered at two years, at which age a Japanese farmed population averaged thirty-seven to forty kilograms. Breeding inverts the usual avian pattern: birds pair roughly one to one, hens may take successive mates, and the male alone incubates, sitting about eight weeks with almost no food or water and losing up to a quarter of his body weight before going on to rear the chicks. Eggs weigh around 600 g and take roughly forty-seven to fifty-six days to hatch. Two things shape emu clinical work. The bird runs a strong annual fat cycle, laying fat down in spring and summer and drawing on it in winter, so body condition must be read against the season rather than against a fixed ideal. And the gut has no prominent crop, ferments mainly in the jejunum and caeca, digests up to forty-five percent of dietary fibre, and moves digesta through quickly.
المؤشّرات الحيوية
- مدّة الحضانة
- 50 – 56 days
- الوزن عند البلوغ
- 40 – 44 kg
NATURAL incubation under the broody male, which is how emus incubate - the stated period is 56 days, with day 50 given as the point from which keepers should start checking daily for hatched chicks. Both numbers come from one sentence, so this is not a splice. A second ratite husbandry reference gives 'Incubation is approximately 50 days' for the emu (The Poultry Site, Ratite Production: Ostrich, Emu and Rhea), which sits on the floor of this band and is not merged in. The withdrawn 47-day floor was a misreading: DD 47 in the cited imaging study is the day the experiment ENDED and the remaining embryos were sacrificed - no emu hatched at 47 days in any cited source. As stored previously, a keeper was told to expect hatch up to nine days before it can happen.
ADULT body weight, explicitly labelled adult, as summarised in a peer-reviewed Poultry Science paper from four primary studies (Sales et al. 1999; Naveena et al. 2013; Menon et al. 2014; Yokohama 2014). READ THIS AS AN APPROXIMATE CENTRAL FIGURE, NOT A REFERENCE INTERVAL - the source gives no spread, and healthy adults sit well outside 40-44 kg. The emu has no breeds. Sexes are not separated in the figure, but the same paper states that at 4 to 6 years of age female emus are heavier than males ('At 4 to 6 yr of age, female emus exhibited larger body weight than males, while fat accumulation in males was greater than that in females'). Deliberately NOT used: the same paper's own 2-year-old SLAUGHTERED body weights (mean 38.824 +/- 5.870 kg; females 39.500 +/- 6.053 kg, males 38.088 +/- 5.780 kg), which come from the same Japanese farm and are the same kind of growth-stage figure that was withdrawn.
تُعرض المؤشّرات المُوثَّقة فقط. غياب مؤشّر هنا يعني أنه غير مذكور في مرجع موثوق لهذا النوع — لا أنه ناقص من الصفحة.
السلالات — لا يوجد ارتباط
لا سلالة منشورة لهذا النوع بعد. السلالات محصودة بأعداد كبيرة وتنتظر اعتماداً بشرياً قبل أن تُنشر.
كل السلالات ←العلامات السريرية — لا يوجد ارتباط
لا علامة سريرية منشورة بعد — وهي أيضاً ما ينقص باحث العلامات.
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