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Male Western moose stand anywhere from 1.9 to 2.0 metres (6.2 to 6.6 ft) at the shoulder. Their antlers span 1.5 to 1.7 metres (4.9 to 5.6 ft) and they weigh anywhere from 380–720 kilograms (840–1,590 lb). Female Western moose stand at 1.8 metres (5 ft 11 in) on average, and weigh anywhere from 270 to 360 kilograms (600 to 790 lb).
Alaska moose are sexually dimorphic with males being 40% heavier than females. [5] Male Alaska moose can stand over 2.1 m (6.9 ft) at the shoulder, and weigh over 635 kg (1,400 lb). When Alaska moose are born, they weigh on average about 28 pounds, but by five months old they can weigh up to 280 pounds. [4]
Eastern moose are the third largest subspecies of moose only behind the western moose and the Alaska moose. Males stand on average 1.7–2.0 m (5.6–6.6 ft) at the shoulder and weigh up to 634 kg (1,398 lb). Females stand on average 1.7 m (5.6 ft) at the shoulder and weigh on average 270–360 kg (600–790 lb).
This simple method is sometimes used for cattle. The number of animal units represented by one or more head of cattle may be calculated by dividing their total body mass in kg by 454 (or dividing their weight in pounds by 1000). Thus an 800-pound steer would be considered equivalent to 0.8 animal units. [4] Estimation based on metabolic body size.
Dairy cow Dairy cow Beef cow Tropical cow Dairy cow producing 3,000 L (790 US gal) milk 2-year-old dry Merino sheep Ewe with one lamb Weight equivalent of one unit 650 kg (1,430 lb) 455 kg (1,003 lb) 250 kg (550 lb) 600 kg (1,300 lb) 45 kg (99 lb) 55 kg (121 lb) Dairy cow 1.00 1.00 1.00 0.50 0.70 1.00 20.0 8.0 Dry medium beef cow
Precocial mammal species generally have greater adult body weights than altricial mammals as precocial mammals have markedly longer gestation periods than altricial mammals. [21] The neonatal of larger mammals develop relatively more quickly and thus making it more likely that a large mammal would produce a more well-developed neonate as a ...
The energy expenditure of chasing and fighting during the breeding season can result in a buck losing an immense amount of weight, with some research documenting losses of as much as 20% of body weight with some sources showing body mass losses of up to 30%. [11] On average, a buck before breeding season can weigh up to 180 pounds (82 kg).
Even mild heat stress can reduce the yield of cow milk: research in Sweden found that average daily temperatures of 20–25 °C (68–77 °F) reduce daily milk yield per cow by 200 g (0.44 lb), with the loss reaching 540 g (1.19 lb) for 25–30 °C (77–86 °F). [53]