4 ms·
Why would you think that? Larger animals are usually much more energy efficient for various reasons - less surface area to radiate heat, and economies of scale
by Houshalter 10y ago
Why would you think that? Larger animals are usually much more energy efficient for various reasons - less surface area to radiate heat, and economies of scale with larger organs.
- ane 10y agoNo, beef and lamb are the most energy consuming sources of meat. (A dairy producing cow is different.) https://en.wikipedia.org/wiki/Feed_conversion_ratio https://en.wikipedia.org/wiki/Feed_conversion_ratio For cattle, a FCR range from less than 5 to more than 20 kg feed dry matter per kg gain may be encountered.[ Whereas for chickens: Poultry has a feed conversion ratio of 2 to 1.
- baddox 10y agoAgain, that's simple mass efficiency. We can also talk about other efficiencies, like cost of feed versus cost of meat.
- Houshalter 10y agoI believe you, but I'm very surprised. That has larger animals almost universally less efficient than smaller animals, which is the exact opposite of the expected efficiency due to Kleiber's law: https://en.wikipedia.org/wiki/Kleiber%27s_law https://en.wikipedia.org/wiki/Kleiber%27s_law >a cat, having a mass 100 times that of a mouse, will have a metabolism roughly 32 times greater than that of a mouse. And yet this is saying that a mice sized animal should be expected to have the same, or perhaps even better Feed conversion ratio than a cat sized animal. Again, I believe you, but it makes no sense.
- mapt 10y agoThe larger livestock will usually have a much longer lifespan. It has to keep its flesh heated above ambient for that entire lifespan. If Mouse A lives 100x longer and puts on the same weight and achieves the same stature as Mouse B, it's spent ~100x as much energy getting to the same physiological place as Mouse B.
- thevardanian 10y agoNot really. There's a basic thermodynamic inefficiency as organisms get larger, and consume farther away from the energy source, in this that being the sun.
- Houshalter 10y agoHow are cattle consuming farther away from the energy source than chickens?
- deleted 10y ago[deleted]
- g8oz 10y agoThey are not more efficient in terms of how many acres are required to produce a given amount of calories.
- shalmanese 10y agoCows are slaughtered at 80 weeks while chickens are slaughtered at 6 - 8 weeks. That extra order of magnitude of basal metabolic rate is where the energy gets consumed.