Incubation increases oxidative imbalance compared to chick rearing in a seabird, the Magellanic penguin (Spheniscus magellanicus)

被引:8
|
作者
Colominas-Ciuro, Roger [1 ]
Bertellotti, Marcelo [2 ]
Carabajal, Eliana [2 ]
D'Amico, Veronica L. [2 ]
Barbosa, Andres [1 ]
机构
[1] CSIC, Museo Nacl Ciencias Nat, Dept Ecol Evolut, E-28006 Madrid, Spain
[2] Consejo Nacl Invest Cient & Tecn, Ctr Estudio Sistemas Marinos, Ctr Nacl Patagon, RA-2915 Puerto Madryn, Argentina
关键词
HISTORY TRADE-OFFS; ANTIOXIDANT CAPACITY; REPRODUCTIVE PHASES; STRESS; COSTS; DAMAGE; ALLOCATION; ENERGETICS; OXIDANTS; BEHAVIOR;
D O I
10.1007/s00227-017-3139-4
中图分类号
Q17 [水生生物学];
学科分类号
071004 ;
摘要
It is expected that activities which require a high use of energy could generate higher oxidative stress. In the present study, we have compared two breeding periods (incubation and chick rearing) with different energetic demands in the Magellanic penguin, predicting a higher oxidative unbalance during chick rearing since involves higher demanding activities such as chick feeding and greater nest protection than during incubation. Specifically, we predicted higher oxidative damage and lower antioxidant defences during chick rearing than during incubation. Fieldwork was conducted in a Magellanic penguin colony located in Estancia San Lorenzo (42 degrees 05'S, 63 degrees 49'W), Peninsula Valdes, Argentina, during the breeding season of 2014-2015. Surprisingly, our results did not support our initial prediction. Incubating adults had their oxidative status unbalanced showing significantly lower antioxidant levels than those rearing chicks. Moreover, oxidative damage did not show any significant variation between both breeding periods. Further, we did not find differences in oxidative status between sexes. Our results suggest that incubation is a highly demanding activity compared to chick rearing in terms of oxidative balance since the lower presence of antioxidants can be explained as they have probably depleted to limit oxidative damage by ROS. Differential foraging
引用
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页数:8
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