title: An energetic perspective on tissue regeneration: The costs of tail autotomy in growing geckos.
abstract: Tail autotomy is a crucial antipredatory lizard response, which greatly increases individual survival, but at the same time also compromises locomotor performance, sacrifices energy stores and induces a higher burden due to the ensuing response of regenerating the lost body part. The potential costs of tail autotomy include shifts in energy allocation and metabolic rates, especially in juveniles, which invest their energy primarily in somatic growth. We compared the metabolic rates and followed the growth of juvenile males with and without regenerating tails in the Madagascar ground gecko (Paroedura picta), a nocturnal ground-dwelling lizard. Geckos with intact tails and those that were regrowing them grew in snout-vent-length at similar rates for 22weeks after autotomy. Tail regeneration had a negligible influence on body mass-corrected metabolic rate measured at regular intervals throughout the regenerative process. We conclude that fast-growing juveniles under the conditions of unrestricted food can largely compensate for costs of tail loss and regeneration in their somatic growth without a significant impact on the total individual body mass-corrected metabolic rate.
authors.affiliation: Department of Zoology, Faculty of Science, Charles University, Viničná 7, Prague 2, 12844, Czech Republic. Electronic address: zuzana.starostova@natur.cuni.cz.
authors.forename: Zuzana
authors.initials: Z
authors.lastname: Starostová
authors.affiliation: Institute of Vertebrate Biology AS CR, Květná 8, Brno, 603 65, Czech Republic. Electronic address: gvozdik@brno.cas.cz.
authors.forename: Lumír
authors.initials: L
authors.lastname: Gvoždík
authors.affiliation: Department of Ecology, Faculty of Science, Charles University, Viničná 7, Prague 2, 12844, Czech Republic. Electronic address: lukas.kratochvil@natur.cuni.cz.
authors.forename: Lukáš
authors.initials: L
authors.lastname: Kratochvíl
mesh_terms: D000818:Animals; D001481:Basal Metabolism; D049628:Body Size; D004734:Energy Metabolism; D008116:Lizards / Q000254:growth & development / Q000502:physiology*; D008297:Male; D010101:Oxygen Consumption; D011897:Random Allocation; D012038:Regeneration; D015203:Reproducibility of Results; D013623:Tail / Q000254:growth & development / Q000502:physiology*; D013997:Time Factors; D015430:Weight Gain
keywords: autotomy; growth; lizard; metabolic rate; oxygen consumption; regeneration