Influence of incubation temperature on embryo development, hatchling morphology and early growth rate in red-footed tortoise (Chelonoidis carbonaria)

Autor(es)

Mendoza, Pierina ^{[1, 2]} ; Cerdan, Isaura ^[3] ; Garcia, Beatriz ^[3] ; Furuta, Camila ^[1] ; Di Santo, Ludmilla ^[4] ; Sanfilippo, Luiz F. ^[5] ; Bicego, Kenia C. ^[6] ; Carciofi, Aulus C. ^[4]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ, Sch Agr & Vet Sci, Dept Anim Sci, BR-14884900 Sao Paulo - Brazil

^[2] WARMI Wildlife Anim Res & Management Integrat, Lima - Peru

^[3] Sao Paulo State Univ, Sch Agr & Vet Sci, Dept Biol Sci, BR-14884900 Sao Paulo - Brazil

^[4] Sao Paulo State Univ, Dept Clin & Vet Surg, Sch Agr & Vet Sci, BR-14884900 Sao Paulo - Brazil

^[5] Univ Sao Paulo, Inst Biomed Sci, Av Prof Lineu Prestes 2415, BR-05508900 Sao Paulo, SP - Brazil

^[6] Sao Paulo State Univ UNESP, Sch Agr & Vet Sci, Dept Anim Morphol & Physiol, BR-14884900 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY; v. 259, SEP 2021.
• Citações Web of Science: 0

Resumo

Reptile embryos respond to temperature changes with metabolic and physiological adjustments that influence hatchling success, phenotype, behaviour, and growth rate. Climate change and global warming can affect the reptile population by altering the frequencies of hatchling survival and phenotypes. Therefore, previous studies proposed artificial incubation as a potential strategy for mitigating these effects. Red-footed tortoise (Chelonoidis carbonaria) eggs were collected and incubated at constant temperatures of 27.5 degrees C and 29.5 degrees C to investigate the physiological effects of temperature on embryo development, hatchling morphology, and early post-hatch growth rate. The direct effect of temperature on the incubation period, egg mass loss, hatching success, hatchling size, and mass was evaluated at hatching and three months of age. Hatchlings from 29.5 degrees C presented a shorter incubation period (141 days) than those from 27.5 degrees C (201 days; p < 0.05). Egg mass loss, hatchling mass, and size at hatching were not different between the incubation temperatures (p > 0.05). However, the hatching success (survival rate) was lower (64.5% versus 100%) in eggs incubated at 29.5 degrees C, but the hatchling mass and straight plastron width were higher at three months of age than those from eggs incubated at 27.5 degrees C (p < 0.05). These results indicate that incubation temperature influences hatching success and hatchling size and mass in the first months by influencing the early growth rate. (AU)

• Processo FAPESP: 19/14923-0 - Efeito do consumo de amido ou fibra no metabolismo energético e crescimento de jabutis piranga (Chelonoidis carbonaria)
• Beneficiário: Pierina Jocelyn Mendoza Yengle
• Modalidade de apoio: Bolsas no Brasil - Mestrado