Only nine species of existing land mammals grow to adult bodyweights over 1000 kg (1 megagram). All are herbivores thatemploy fermentative digestion. These “megaherbivores” are thetwo species of elephants, the five species of rhinos, the commonhippo, and the giraffe. What are the metabolic pros and cons ofsuch large size? Can you suggest why no terrestrial carnivoresachieve such large size?

Aquaculture Science
3rd Edition
ISBN:9781133558347
Author:Parker
Publisher:Parker
Chapter7: Management Practices For Crustaceans And Mollusks
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Only nine species of existing land mammals grow to adult body
weights over 1000 kg (1 megagram). All are herbivores that
employ fermentative digestion. These “megaherbivores” are the
two species of elephants, the five species of rhinos, the common
hippo, and the giraffe. What are the metabolic pros and cons of
such large size? Can you suggest why no terrestrial carnivores
achieve such large size?

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