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Animal Biodiversity and Conservation. Volume 39.2 (2016) Pages: 147-154

Factors affecting fledgling output of great tits, Parus major, in the long term

Rodríguez, S., Álvarez, E., Barba, E.

DOI: https://doi.org/10.32800/abc.2016.39.0147

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Abstract

Fledgling production has often been used as an estimator of avian reproductive success, and it is conditioned by factors affecting offspring development and/or survival during the nesting period. We aimed to determine which predictors influenced fledgling output among a set of basic breeding parameters and local temperature data collected over 25 years in a Mediterranean great tit, Parus major, population, using an information–theoretic approach for model selection. Of the studied variables, the number of hatchlings per nest was the single–most important predictor influencing fledgling production, with larger broods eventually yielding more fledglings, although mass prior to fledging may have been compromised. This result suggests an overall good adjustment between brood size and resource availability in the studied population.

Keywords

Fledgling production, Nestling survival, Brood size, Long–term study

Cite

Rodríguez, S., Álvarez, E., Barba, E., 2016. Factors affecting fledgling output of great tits, Parus major, in the long term. Animal Biodiversity and Conservation, 39: 147-154, DOI: https://doi.org/10.32800/abc.2016.39.0147

Reception date:

11/01/2016

Acceptation date:

10/03/2016

Publication date:

30/06/2016

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