Life-history variation of a neotropical thrush challenges food limitation theory
Since David Lack first proposed that birds rear as many young as they can nourish, food limitation has been accepted as the primary explanation for variation in clutch size and other life-history traits in birds. The importance of food limitation in life-history variation, however, was recently ques...
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2005
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09628452_v272_n1564_p769_Ferretti http://hdl.handle.net/20.500.12110/paper_09628452_v272_n1564_p769_Ferretti |
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paper:paper_09628452_v272_n1564_p769_Ferretti |
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paper:paper_09628452_v272_n1564_p769_Ferretti2023-06-08T15:58:04Z Life-history variation of a neotropical thrush challenges food limitation theory Clutch size Food limitation Life-history traits Nest predation Parental behaviour Rufous-bellied thrush clutch size food limitation life history parental care passerine animal behavior article bird clutch size evolution food availability life history Neotropics nest predation nonhuman priority journal adaptation analysis of variance animal animal food Argentina comparative study feeding behavior growth, development and aging morphometrics physiology reproduction songbird videorecording Aves Adaptation, Physiological Analysis of Variance Animal Nutrition Physiology Animals Argentina Body Weights and Measures Feeding Behavior Reproduction Songbirds Video Recording Since David Lack first proposed that birds rear as many young as they can nourish, food limitation has been accepted as the primary explanation for variation in clutch size and other life-history traits in birds. The importance of food limitation in life-history variation, however, was recently questioned on theoretical grounds. Here, we show that clutch size differences between two populations of a neotropical thrush were contrary to expectations under Lack's food limitation hypothesis. Larger clutch sizes were found in a population with higher nestling starvation rate (i.e. greater food limitation). We experimentally equalized clutches between populations to verify this difference in food limitation. Our experiment confirmed greater food limitation in the population with larger mean clutch size. In addition, incubation bout length and nestling growth rate were also contrary to predictions of food limitation theory. Our results demonstrate the inability of food limitation to explain differences in several life-history traits: clutch size, incubation behaviour, parental feeding rate and nestling growth rate. These life-history traits were better explained by inter-population differences in nest predation rates. Food limitation may be less important to life history evolution in birds than suggested by traditional theory. © 2005 The Royal Society. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09628452_v272_n1564_p769_Ferretti http://hdl.handle.net/20.500.12110/paper_09628452_v272_n1564_p769_Ferretti |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Clutch size Food limitation Life-history traits Nest predation Parental behaviour Rufous-bellied thrush clutch size food limitation life history parental care passerine animal behavior article bird clutch size evolution food availability life history Neotropics nest predation nonhuman priority journal adaptation analysis of variance animal animal food Argentina comparative study feeding behavior growth, development and aging morphometrics physiology reproduction songbird videorecording Aves Adaptation, Physiological Analysis of Variance Animal Nutrition Physiology Animals Argentina Body Weights and Measures Feeding Behavior Reproduction Songbirds Video Recording |
| spellingShingle |
Clutch size Food limitation Life-history traits Nest predation Parental behaviour Rufous-bellied thrush clutch size food limitation life history parental care passerine animal behavior article bird clutch size evolution food availability life history Neotropics nest predation nonhuman priority journal adaptation analysis of variance animal animal food Argentina comparative study feeding behavior growth, development and aging morphometrics physiology reproduction songbird videorecording Aves Adaptation, Physiological Analysis of Variance Animal Nutrition Physiology Animals Argentina Body Weights and Measures Feeding Behavior Reproduction Songbirds Video Recording Life-history variation of a neotropical thrush challenges food limitation theory |
| topic_facet |
Clutch size Food limitation Life-history traits Nest predation Parental behaviour Rufous-bellied thrush clutch size food limitation life history parental care passerine animal behavior article bird clutch size evolution food availability life history Neotropics nest predation nonhuman priority journal adaptation analysis of variance animal animal food Argentina comparative study feeding behavior growth, development and aging morphometrics physiology reproduction songbird videorecording Aves Adaptation, Physiological Analysis of Variance Animal Nutrition Physiology Animals Argentina Body Weights and Measures Feeding Behavior Reproduction Songbirds Video Recording |
| description |
Since David Lack first proposed that birds rear as many young as they can nourish, food limitation has been accepted as the primary explanation for variation in clutch size and other life-history traits in birds. The importance of food limitation in life-history variation, however, was recently questioned on theoretical grounds. Here, we show that clutch size differences between two populations of a neotropical thrush were contrary to expectations under Lack's food limitation hypothesis. Larger clutch sizes were found in a population with higher nestling starvation rate (i.e. greater food limitation). We experimentally equalized clutches between populations to verify this difference in food limitation. Our experiment confirmed greater food limitation in the population with larger mean clutch size. In addition, incubation bout length and nestling growth rate were also contrary to predictions of food limitation theory. Our results demonstrate the inability of food limitation to explain differences in several life-history traits: clutch size, incubation behaviour, parental feeding rate and nestling growth rate. These life-history traits were better explained by inter-population differences in nest predation rates. Food limitation may be less important to life history evolution in birds than suggested by traditional theory. © 2005 The Royal Society. |
| title |
Life-history variation of a neotropical thrush challenges food limitation theory |
| title_short |
Life-history variation of a neotropical thrush challenges food limitation theory |
| title_full |
Life-history variation of a neotropical thrush challenges food limitation theory |
| title_fullStr |
Life-history variation of a neotropical thrush challenges food limitation theory |
| title_full_unstemmed |
Life-history variation of a neotropical thrush challenges food limitation theory |
| title_sort |
life-history variation of a neotropical thrush challenges food limitation theory |
| publishDate |
2005 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09628452_v272_n1564_p769_Ferretti http://hdl.handle.net/20.500.12110/paper_09628452_v272_n1564_p769_Ferretti |
| _version_ |
1768545473033928704 |