Metabolic loads and the costs of metazoan reproduction.

Autor: Ginther SC; Centre for Geometric Biology, School of Biological Sciences, Monash University, Clayton, VIC 3800, Australia., Cameron H; Centre for Geometric Biology, School of Biological Sciences, Monash University, Clayton, VIC 3800, Australia.; School of Biosciences, The University of Melbourne, Melbourne, VIC 3010, Australia., White CR; Centre for Geometric Biology, School of Biological Sciences, Monash University, Clayton, VIC 3800, Australia., Marshall DJ; Centre for Geometric Biology, School of Biological Sciences, Monash University, Clayton, VIC 3800, Australia.
Jazyk: angličtina
Zdroj: Science (New York, N.Y.) [Science] 2024 May 17; Vol. 384 (6697), pp. 763-767. Date of Electronic Publication: 2024 May 16.
DOI: 10.1126/science.adk6772
Abstrakt: Reproduction includes two energy investments-the energy in the offspring and the energy expended to make them. The former is well understood, whereas the latter is unquantified but often assumed to be small. Without understanding both investments, the true energy costs of reproduction are unknown. We present a framework for estimating the total energy costs of reproduction by combining data on the energy content of offspring (direct costs) and the metabolic load of bearing them (indirect costs). We find that direct costs typically represent the smaller fraction of the energy expended on reproduction. Mammals pay the highest reproductive costs (excluding lactation), ~90% of which are indirect. Ectotherms expend less on reproduction overall, and live-bearing ectotherms pay higher indirect costs compared with egg-layers. We show that the energy demands of reproduction exceed standard assumptions.
Databáze: MEDLINE
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