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Effects of neonatal nutrition on adult reproduction in a passerine bird
Author(s) -
BLOUNT JONATHAN D.,
METCALFE NEIL B.,
ARNOLD KATHRYN E.,
SURAI PETER F.,
MONAGHAN PAT
Publication year - 2006
Publication title -
ibis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.933
H-Index - 80
eISSN - 1474-919X
pISSN - 0019-1019
DOI - 10.1111/j.1474-919x.2006.00554.x
Subject(s) - taeniopygia , biology , passerine , fecundity , reproduction , yolk , breed , zebra finch , avian clutch size , zoology , reproductive success , precocial , ecology , population , demography , neuroscience , sociology
Effects of neonatal nutrition on adult reproductive performance have been little studied. In Zebra Finches Taeniopygia guttata , poor neonatal nutrition is known to be associated with reduced blood antioxidant levels in adulthood, which could impair reproductive performance. Here, we compare the effects of standard‐quality (SQ) or lower‐quality (LQ) neonatal nutrition on components of fecundity. Compared with controls, LQ birds took longer to initiate egg‐laying, and then laid eggs at a slower rate. LQ birds did not, however, show reduced clutch mass or size, or yolk antioxidant levels (retinol; α‐ or γ‐tocopherol; carotenoids). Zebra Finches breed opportunistically, often only once in their short lifetime. Therefore, the timing but also the number and quality of eggs are critical fitness‐related traits. Our results indicate that LQ birds had impaired reproductive capacity, suggesting resource accumulation constraints. Maximizing egg number and quality appears to have been more important than rapid egg production.