Arid
DOI10.1139/cjz-2014-0289
Context-dependent foraging by seed-eating birds does not necessarily mean low ecological predictability
Marone, L.1,2; Camin, S. R.1,2; Cueto, V. R.3,4,5
通讯作者Marone, L.
来源期刊CANADIAN JOURNAL OF ZOOLOGY
ISSN0008-4301
EISSN1480-3283
出版年2015
卷号93期号:5页码:353-359
英文摘要

Flexibility of foraging behaviour affects our capacity to predict ecological outputs such as population responses to habitat change. Some birds forage following rules of absolute value of the food item (i.e., absolute valuation). Their realized diet is strongly correlated with the profitability of the food item and it is predictable. Consumers, however, do not always follow absolute rules. Opportunistic foragers adjust food consumption based on the availability of the food item. Their diet is still predictable but more elusive. Relativistic or context-dependent foragers change the ranks of food preferences depending on the presence of alternative food options in the choice set. Predicting their contingent diet is particularly difficult. We tested if the context of seed availability affects foraging decisions of three seed-eating bird species (the Rufous-collared Sparrow (Zonotrichia capensis (Statius Muller, 1776)), the Many-colored Chaco Finch (Saltatricula multicolor (Burmeister, 1860)), and the Common Diuca Finch (Diuca diuca (Molina, 1782))) using choice experiments aimed at detecting if seed preferences for two types of target seeds changed according to context. Birds showed very similar rankings of preferences for target seeds; however, preferences for attractive food items were not fixed but often increased in less valuable contexts. Although results imply some degree of context-dependent behaviour, predictability of bird diet was preserved because the ranking of preferences remained mostly unchanged between contexts (and among bird species), and the higher consumption of target grass seeds in a less attractive context was widely expected from the intrinsic properties of the seeds.


英文关键词context dependence ecological predictability environmental change feeding experiments rational food choice
类型Article
语种英语
国家Argentina
收录类别SCI-E
WOS记录号WOS:000354125500004
WOS关键词FEEDING-PREFERENCE EXPERIMENTS ; CENTRAL MONTE DESERT ; ARGENTINA ; CHOICE ; SPECIALIST ; RESERVES ; DESIGN ; IMPACT
WOS类目Zoology
WOS研究方向Zoology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/186398
作者单位1.IADIZA CONICET Mendoza, Desert Community Ecol Res Team Ecodes, RA-5500 Mendoza, Argentina;
2.Univ Nacl Cuyo, Fac Ciencias Exactas & Nat, RA-5500 Mendoza, Argentina;
3.Univ Buenos Aires, FCEyN, Dept Ecol Genet & Evoluc, Ecodes, Buenos Aires, DF, Argentina;
4.Univ Buenos Aires, IEGEBA, FCEyN, Buenos Aires, DF, Argentina;
5.Consejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, Argentina
推荐引用方式
GB/T 7714
Marone, L.,Camin, S. R.,Cueto, V. R.. Context-dependent foraging by seed-eating birds does not necessarily mean low ecological predictability[J],2015,93(5):353-359.
APA Marone, L.,Camin, S. R.,&Cueto, V. R..(2015).Context-dependent foraging by seed-eating birds does not necessarily mean low ecological predictability.CANADIAN JOURNAL OF ZOOLOGY,93(5),353-359.
MLA Marone, L.,et al."Context-dependent foraging by seed-eating birds does not necessarily mean low ecological predictability".CANADIAN JOURNAL OF ZOOLOGY 93.5(2015):353-359.
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