Regulation of Breeding Behavior: Do Energy-Demanding Periods Induce a Change in Prolactin or Corticosterone Baseline Levels in the Common Tern (Sterna hirundo)?

被引:14
作者
Riechert, Juliane [1 ]
Chastel, Olivier [2 ]
Becker, Peter H. [1 ]
机构
[1] Inst Avian Res Vogelwarte Helgoland, D-26386 Wilhelmshaven, Germany
[2] CNRS, Ctr Etud Biol Chize, F-79360 Villiers En Bois, France
来源
PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY | 2014年 / 87卷 / 03期
关键词
LONG-LIVED SEABIRD; BLOOD-SAMPLING TECHNIQUE; BODY-MASS; REPRODUCTIVE-PERFORMANCE; FORAGING BEHAVIOR; PARENTAL CARE; FOOD AVAILABILITY; METABOLITE LEVELS; CLUTCH SIZE; EXPERIENCE;
D O I
10.1086/675682
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
Hormones are involved in reproductive decisions, linking environmental cues and body condition and adapting behavior. Mass loss is often accompanied by decreased prolactin and increased corticosterone concentrations, influencing incubation and brooding behavior and ultimately triggering nest desertion. Using blood-sucking bugs (Dipetalogaster maxima), we measured baseline prolactin, corticosterone, and ketone body values in incubating common terns (Sterna hirundo) between 2006 and 2009 during energy-demanding periods: 50 pairs were sampled hungry (after an incubation bout) and again fed (after foraging). In a second approach, we sampled 57 other pairs (experienced and inexperienced birds) three times over their individual breeding period, because reproduction, especially chick rearing, is a very energy-demanding process. In line with the common physiological pattern of fasting, we found significantly lower baseline prolactin values in hungry terns, which were negatively related to mass loss over the incubation bout, whereas corticosterone and ketone body levels were marginally increased. Compared to that in the incubation phase, the prolactin level dropped after hatching of chicks in inexperienced birds, perhaps indicating lower parental expenditure. Corticosterone, on the other hand, increased after hatching in males, probably linked to higher foraging activity, as males mainly deliver food during the first days. These energy-demanding periods clearly influenced hormones and ketone bodies, maybe reinforced by the low energy margin of this small seabird species, but energy reserves were not depleted to a level affecting behavior or reproductive success.
引用
收藏
页码:420 / 431
页数:12
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