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Year-class differences in the reproductive system, plasma prolactin and corticosterone concentrations, and onset of prebasic molt in male dark- eyed juncos (Junco hyemalis) during the breeding period

Dates

Year
2000

Citation

Deviche, P., Wingfield, J. C., and Sharp, P. J., 2000, Year-class differences in the reproductive system, plasma prolactin and corticosterone concentrations, and onset of prebasic molt in male dark- eyed juncos (Junco hyemalis) during the breeding period: General Comparitive Endocrinology, v. 118, no. 3, p. 425-35.

Summary

Year-class differences in reproductive function were investigated in a free-living population of adult male Dark-eyed Juncos, Junco hyemalis, breeding in interior Alaska. Second-year males (SY, entering their first breeding season) were compared with after-second-year males (ASY, entering at least their second breeding season). We measured body mass, size of the cloacal protuberance (CP), testis mass, onset of prebasic molt, and concentrations of plasma luteinizing hormone (LH), testosterone (T), corticosterone (CORT), and prolactin (PRL) throughout the reproductive season (April to mid-July). There were no differences in SY and ASY body weights but SY males had smaller CPs and testis masses than ASY males during gonadal recrudescence [...]

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File Process
Type
End Note
Reference Item
6127 records
Reference File
NWBLCC-20160503-Saved.xml

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Citation Extension

journalGeneral Comparitive Endocrinology
parts
typeNotes
value1453
typePages
value425-35.
typeVolume
value118
typeNumber
value3
citationTypeJournal Article

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