Seasonal Changes of Testis Volume, Scrotal Circumference and Serum Testosterone Concentrations in Male Sika Deer (Cervus nippon).
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Accession number;00A0378306
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| Title;Seasonal Changes of Testis Volume, Scrotal Circumference and Serum Testosterone Concentrations in Male Sika Deer (Cervus nippon). |
| Author;
KAMEYAMA Y
(Tokyo Univ. Agriculture, Abashiri-shi, Jpn)
TAKAHASHI R
(Tokyo Univ. Agriculture, Abashiri-shi, Jpn)
ITO M
(Tokyo Univ. Agriculture, Abashiri-shi, Jpn)
MARU R
(Nihon Univ., Tokyo, Jpn)
ISHIJIMA Y
(Tokyo Univ. Agriculture, Abashiri-shi, Jpn)
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Journal Title;Anim Sci J
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Journal Code:F0902A
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ISSN:1344-3941
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VOL.71;NO.2;PAGE.137-142(2000)
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| Figure&Table&Reference;FIG.3, TBL.1, REF.23 |
| Pub. Country;Japan |
| Language;English |
| Abstract;Annual changes in the concentration of serum testosterone (T) in sika deer stags were examined. The relationships between the serum T concentration and the size of testis, and between the serum T concentration and the antler cycle were also evaluated. The serum T concentration increased between July and September, then decreased between October and November. The highest serum T concentration was noted in September or October. During the period from November to the following July, the serum T concentration remained low. The volume of the testis and scrotal circumference showed changes similar to those in the serum T concentration. The testis volume showed clearer seasonal changes than those of the scrotal circumference. Shedding of velvets was observed during the period of high serum T concentrations. These results indicate that there are distinct annual changes in the blood T concentration in sika deer stags, which are related to the annual changes in testis volumes, scrotal circumferences and antlers. (author abst.) |
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