Provisioning of nestlings by male and female red-winged blackbirds, Agelaius phoeniceus
Provisioning of nestlings by male and female red-winged blackbirds, Agelaius phoeniceus
复制标题
雄性和雌性红翅黑鸫 (Agelaius phoeniceus) 喂养雏鸟
DOI：
10.1016/s0003-3472(05)80675-x
复制
发表时间：
1990
期刊：
影响因子：
2.5
通讯作者：
Juliann Zanocco
中科院分区：
文献类型：
--
作者：
K. Yasukawa;Judy L. Mcclure;Rebecca A. Boley;Juliann Zanocco
使用逐步多元线性回归来确定影响雄性和雌性红翅黑鹂雏鸟喂养率的因素，以及这种供给对繁殖成功率的影响。此外，判别函数分析用于检查配对喂养和雌性喂养的幼崽之间的差异。研究发现，母本和父本的喂养率随着繁殖经验、育雏规模、育雏中雄性比例和雏鸟年龄的增加而增加。当两只或更多雏鸟同时在其领地活动时，雄鸟最有可能在最先进的巢中喂养雏鸟。雌性的摄食率在筑巢季节下降。雌性取食率与雄性取食率和雌性地位无关，因此父母双方喂养的雏鸟比仅由雌性喂养的雏鸟获得更多的食物。结果，配对喂养的雏鸟中挨饿的雏鸟减少了，而且这些雏鸟比雌鸟喂养的雏鸟产生了更多的雏鸟。因此，雄性和雌性都会受到自己经历的影响，并且似乎会对“雏鸟需求”做出反应。虽然雄性和雌性的供给可以用特定投资策略的成本和收益来解释，但显然需要对成本和收益进行识别和量化，并进行实验研究来检验其影响，以便更全面地了解父母对红翅黑鸟的投资。
Stepwise multiple linear regression was used to identify the factors that affect the rate at which nestlings were fed by male and female red-winged blackbirds, and the effects of this provisioning on reproductive success. In addition, discriminant function analysis was used to examine the differences between pair-fed and female-fed broods. Both maternal and paternal feeding rate were found to increase with breeding experience, brood size, proportion of males in the brood and nestling age. The male was most likely to feed nestlings in the most advanced nest when two or more were concurrently active on his territory. Female feeding rate decreased through the nesting season. Female feeding rate was independent of male feeding rate and female status, so nestlings fed by both parents received more food than those fed only by the female. As a result, fewer nestlings starved in pair-fed broods, and these broods produced more fledglings than female-fed broods. Thus, both males and females are affected by their experience, and appear to respond to ‘nestling demand’. While male and female provisioning can be interpreted in terms of the costs and benefits of specific investment strategies, identification and quantification of the costs and benefits, and experimental studies to examine their effects are clearly needed for a more complete under-standing of parental investment in the red-winged blackbird.