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Does testis size in cuckoos vary with paternal care?

Maurer, Golo; Blomberg, Simon Phillip


Male birds confront a tradeoff between increasing the number of offspring they sire and providing parental care. This behavioral tradeoff may be manifested as variation in testis size: larger testes, producing more sperm and testosterone, are advantageous for sperm and mating competition, thus ensuring paternity, yet high levels of plasma testosterone also inhibit parental care. There is good evidence that relative testis size is greater in species in which males compete more intensely to...[Show more]

CollectionsANU Research Publications
Date published: 2009
Type: Journal article
Source: Auk
DOI: 10.1525/auk.2009.07185


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