Plasma testosterone profiles, semen characteristics, and artificial insemination in yearling and adult captive Mallard ducks (Anas platyrhynchos)

Testosterone profiles and semen characteristics were determined using yearling and adult captive wild-strain Mallard (Anas platyrhynchos) drakes. Wild-strain Mallard hens were artificially inseminated by modifying a technique developed for domesticated poultry. In both adult and yearling drakes, the...

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Bibliographic Details
Published in:Poultry science 1998-06, Vol.77 (6), p.882-887
Main Authors: Stunden, C.E. (University of British Columbia, Vancouver, BC, Canada.), Bluhm, C.K, Cheng, K.M, Rajamahendran, R
Format: Article
Language:English
Subjects:
AGE
AGE DIFFERENCES
Aging
Animals
ARTIFICIAL INSEMINATION
BLOOD PLASMA
CANARD
DUCKS
Ducks - physiology
ECLOSABILIDAD DEL HUEVO
ECLOSABILITE
EDAD
EGG HATCHABILITY
EMBRYO MORTALITY
ESPERMATOZOO
Female
FERTILIDAD
FERTILITE
FERTILITY
INSEMINACION ARTIFICIAL
INSEMINATION ARTIFICIELLE
Insemination, Artificial - veterinary
MACHO
MALE
MALES
MORTALIDAD
MORTALITE
MORTALITY
MOTILITY
MOUVEMENT
MOVEMENT
MOVIMIENTO
Oviposition
PATO
PLASMA SANGUIN
PLASMA SANGUINEO
SEASONAL VARIATION
Seasons
SEMEN
Semen - physiology
Sperm Motility
SPERMATOZOA
SPERMATOZOIDE
SPERME
TESTOSTERONAS
TESTOSTERONE
Testosterone - blood
VARIACION ESTACIONAL
VARIATION SAISONNIERE
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Summary:Testosterone profiles and semen characteristics were determined using yearling and adult captive wild-strain Mallard (Anas platyrhynchos) drakes. Wild-strain Mallard hens were artificially inseminated by modifying a technique developed for domesticated poultry. In both adult and yearling drakes, there was a change in the concentration of circulating plasma testosterone during the reproductive season. Testosterone concentrations increased from basal levels in March, peaked in April, and decreased to basal levels in May. The decrease in testosterone concentration to basal level was 2 wk earlier in yearlings than in adults (P 0.05). The decrease in testosterone concentration was associated with the onset of postnuptial molt. Semen volume (0.04 to 0.08 mL) and semen concentration (approximately 1.32 x 10(9) spermatozoa per milliliter) were not different between adult and yearling drakes (P 0.05). Overall mean fertility for yearling and adult drakes obtained with artificial insemination was 70.4%. These results suggest that artificial insemination may be used successfully in the propagation of captive wild-strain Mallard ducks
ISSN:0032-5791
1525-3171
DOI:10.1093/ps/77.6.882