SPERMIATION AND SPERM TRANSPORT IN PASSERINE BIRDS
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Summary.
The testes and seminal sacs of thirty European goldfinches and twenty-one canaries collected from specific nests at known phases of the nest cycle were histologically examined. Although no relationship between a characteristic stage of gonadal development and a specific phase of the nest cycle could be established, the histological findings suggested a relationship between the functioning of the seminal sac and the process of spermiation. The histological results are reported and a hypothetical mechanism for spermiation and sperm transport in passerine birds is described.
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