FN Archimer Export Format
PT J
TI Maternal oxidative stress and reproduction: testing the constraint, cost and shielding hypotheses in a wild mammal
BT 
AF VIBLANC, Vincent A.
   SCHULL, Quentin
   ROTH, Jeffrey D.
   RABDEAU, Juliette
   SARAUX, Claire
   UHLRICH, Pierre
   CRISCUOLO, François
   DOBSON, F. Stephen
AS 1:1;2:1;3:2;4:1;5:3;6:1;7:1;8:2;
FF 1:;2:;3:;4:;5:;6:;7:;8:;
C1 Univ Strasbourg, CNRS, IPHC, UMR 7178, Strasbourg, France.
   Auburn Univ, Dept Biol Sci, Auburn, AL 36849 USA.
   IFREMER Inst Francais Rech Exploitat Mer, UMR MARBEC, Sete, France.
C2 UNIV STRASBOURG, FRANCE
   UNIV AUBURN, USA
   IFREMER Inst Francais Rech Exploitat Mer, UMR MARBEC, Sete, France.
IF 5.037
TC 18
UR https://archimer.ifremer.fr/doc/00415/52679/53542.pdf
LA English
DT Article
DE ;antioxidant;body condition;cost of reproduction;life history;mammal;mitochondria;trade-off
AB 1.Oxidative stress has been proposed as a central causal mechanism underlying the life history trade-off between current and future reproduction and survival in wild animals. 2.Whereas mixed evidence suggests that maternal oxidative stress may act both as a constraint and a cost to reproduction, some studies have reported a lack of association between reproduction and maternal oxidative stress. 3.The oxidative shielding hypothesis offers an alternative explanation, suggesting that mothers may pre-emptively mitigate the oxidative costs of reproduction by increasing antioxidant defences prior to reproduction. 4.We tested the oxidative constraint, cost, and shielding hypotheses using a longitudinal field study of oxidative stress levels in a species that breeds using daily energy income, the Columbian ground squirrel (Urocitellus columbianus). 5.Elevated maternal oxidative damage prior to reproduction was associated with higher maternal investment in litter mass at birth, but not at weaning. 6.Breeding females increased their antioxidant capacity and decreased their oxidative damage from birth to lactation compared to non-breeding females measured at the same time periods. However, lower maternal oxidative stress during lactation was not associated with higher offspring survival or mass growth over this period. 7.Our results provide little evidence for maternal oxidative stress acting as a constraint on, or cost to, reproduction in Columbian ground squirrels, but partially support the idea that oxidative shielding occurred to buffer potential oxidative costs of reproduction. 
PY 2018
PD MAR
SO Functional Ecology
SN 0269-8463
PU Wiley
VL 32
IS 3
UT 000426503900013
BP 722
EP 735
DI 10.1111/1365-2435.13032
ID 52679
ER

EF