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Differences in the temporal scale of reproductive investment across the slow‐fast continuum in a passerine
Author(s) -
Patrick Samantha C.,
Réale Denis,
Potts Jonathan R.,
Wilson Alastair J.,
Doutrelant Claire,
Teplitsky Céline,
Charmantier Anne
Publication year - 2022
Publication title -
ecology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.852
H-Index - 265
eISSN - 1461-0248
pISSN - 1461-023X
DOI - 10.1111/ele.13982
Subject(s) - passerine , ecology , scale (ratio) , temporal scales , reproductive strategy , biology , atmospheric sciences , geography , reproduction , physics , cartography
Life‐history strategies differ with respect to investment in current versus ‘future’ reproduction, but when is this future? Under the novel ‘temporality in reproductive investment hypothesis’, we postulate variation should exist in the time frame over which reproductive costs are paid. Slow‐paced individuals should pay reproductive costs over short (e.g. inter‐annual) time scales to prevent reproductive costs accumulating, whereas fast‐paced individuals should allow costs to accumulate (i.e. senescence). Using Fourier transforms, we quantify adjustments in clutch size with age, across four populations of blue tits ( Cyanistes caeruleus ). Fast populations had more prevalent and stronger long‐term changes in reproductive investment, whereas slower populations had more prevalent short‐term adjustments. Inter‐annual environmental variation partly accounted for short‐, but not long‐term changes in reproductive investment. Our study reveals individuals differ in when they pay the cost of reproduction and that failure to partition this variation across different temporal scales and environments could underestimate reproductive trade‐offs.