Waste to hurry: Dynamic energy budgets explain the need of wasting to fully exploit blooming resources.

A comparative study of the energetics of 165 animal species, including representatives of most large phyla and of all 13 chordate classes, reveals a very wide range of specific somatic maintenance costs, when corrected for a common temperature. While a typical value is 20 J d21 cm23 at 20°C, some vertebrates have values below 10 J d21 cm23 and some small invertebrate planktivores have values exceeding 1 kJ d21 cm23; the salp Thalia seems to have around 8 kJ d 21 cm23. This wide range of values is amazing because some 80–90% of the somatic maintenance costs is generally thought to be used for the turnover of mass and animal species do not differ that much in chemical composition in terms of proteins, lipids and carbohydrates. I present theory-based arguments to suggest that species waste resources for the purpose of remaining small, growing fast, and responding rapidly with population numbers to temporal and local food abundance. Maintenance is the continuous effort organisms invest to keep metabolism in a viable state without association to (nett) production. This paper is about an intriguing pattern of somatic maintenance costs that I found among animal species, but to present it, I first need to discuss its links with respiration and metabolic activity and the role of metabolic memory in this and a data-collection on animal energetics.