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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Oxygen supply limits the heat tolerance of avian embryos

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Author(s):
Vimmerstedt, Jon C. [1] ; Padilla Perez, Dylan J. [2] ; Angilletta, Jr., Michael J. [3] ; VandenBrooks, John M. [1]
Total Authors: 4
Affiliation:
[1] Midwestern Univ, Dept Physiol, Coll Grad Studies, Glendale, AZ 85308 - USA
[2] Fed Univ Sao Paulo UNIFESP, Dept Ecol & Evolutionary Biol, Diadema Campus, Rua Dr Artur Riedel 275, BR-09972270 Sao Paulo, SP - Brazil
[3] Arizona State Univ, Sch Life Sci, Tempe, AZ 85287 - USA
Total Affiliations: 3
Document type: Journal article
Source: BIOLOGY LETTERS; v. 15, n. 11 NOV 2019.
Web of Science Citations: 0
Abstract

Physiologists have primarily focused on two potential explanations for heat stress in animals-the classic model of molecular stability and an alternative model of oxygen limitation. Although the classic model has widespread support, the oxygen-supply model applies to many aquatic animals and some terrestrial ones. In particular, the embryonic stage of terrestrial animals seems most susceptible to oxygen limitation because embryos acquire oxygen from the atmosphere by diffusion rather than ventilation. We report experiments confirming the two conditions of the oxygen-supply model in Japanese quail embryos, Coturnix coturnix. Hypoxia (12% O-2) greatly reduced the chance of survival at 47.5 degrees C, and hyperoxia greatly improved the chance of survival at 48.5 degrees C. This finding expands the scope of the oxygen-supply model to a terrestrial, endothermic species, suggesting that oxygen supply generally limits the heat tolerance of embryos. (AU)

FAPESP's process: 17/21747-8 - Trade-off between behavioral thermoregulation and hydration status in the false coral snake Oxyrhopus guibei (Serpentes, Dipsadidae)
Grantee:Dylan Jose Padilla Perez
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 18/17251-0 - Does thermoregulation drive the evolution of dorsal coloration in tropidurid lizards?
Grantee:Dylan Jose Padilla Perez
Support Opportunities: Scholarships abroad - Research Internship - Master's degree