CONCENTRATIONS OF PROGESTERONE, TESTOSTERONE AND ESTRADIOL-17-BETA IN THE SERUM DURING THE ESTROUS-CYCLE OF ASIAN ELEPHANTS (ELEPHAS-MAXIMUS)

被引：24

作者：

TAYA, K

KOMURA, H

KONDOH, M

OGAWA, Y

NAKADA, K

WATANABE, G

SASAMOTO, S

TANABE, K

SAITO, K

TAJIMA, H

NARUSHIMA, E

机构：

[1] Laboratory of Veterinary Physiology, Tokyo University of Agriculture and Technology, Tokyo, 183, Fuchu

[2] Tokyo, 110, Ueno Zoological Gardens, Ueno Koen, Taito-ku

来源：

ZOO BIOLOGY | 1991年 / 10卷 / 04期

关键词：

ELEPHANT; FOLLICULAR DEVELOPMENT; LUTEAL FUNCTION;

D O I：

10.1002/zoo.1430100404

中图分类号：

S85 [动物医学（兽医学）];

学科分类号：

0906 ;

摘要：

The levels of progesterone, testosterone and estradiol-17-beta in serum samples from two female Asian elephants were measured for the period of 32 months from February 1987 to September 1989. Serum samples were collected weekly from unanesthetized elephants. Each elephant showed eight ovarian cycles in 32 months. Ovarian cycles, characterized by changes in concentrations of serum progesterone, averaged 16.8 +/- 0.6 (mean +/- SEM, n = 14) weeks in length. The changes in concentrations of testosterone in the serum showed a similar pattern to those of progesterone with a striking increase noted during the luteal phase. The highest levels of serum estradiol-17-beta were noted when progesterone levels showed low basal values. These results suggest that estradiol-17-beta may be an index of follicular maturation during the estrous cycle in Asian elephants, and that the ovaries of Asian elephants may produce testosterone in the luteal phase.

引用

页码：299 / 307

页数：9

共 18 条

[1]

Brannian J.D., Griffin F., Papkoff H., Terranova P.F., Short and long phases of progesterone secretion during the oestrous cycle of the African elephant (Loxodonta africana), Journal of Reproduction and Fertility, 84, pp. 357-365, (1988)

[2]

Chappel S.C., Schmidt M., Cyclic release of luteinizing hormone and the effects of luteinizing hormone‐releasing hormone injection in Asiatic elephants, American Journal of Veterinary Research, 40, pp. 451-453, (1979)

[3]

Chenault J.R., Thatcher W.W., Kalra P.S., Abrams R.M., Wilcox C.J., Transitory changes in plasma progestins, estradiol, and luteinizing hormone approaching ovulation in the bovine, Journal of Dairy Science, 58, pp. 709-717, (1975)

[4]

Czekala N.M., Roocroft A., Bates M., Estrogen metabolism in the Asian elephant (Elephas maximus), Biology of Reproduction, 40, (1989)

[5]

Gay V.L., Kerlen J.T., Serum LH and FSH following passive immunization against circulating testosterone in the intact male rat and in orchidectomized rats bearing subcutaneous Silastic implants of testosterone, Archs Andrology, 1, pp. 257-266, (1978)

[6]

Gibori G., Antczak E., Rothchild I., The role of estrogen in the regulation of luteal progesterone secretion in the rat after day 12 of pregnancy, Endocrinology, 100, pp. 1483-1495, (1977)

[7]

Herriman I.D., Harwood D.J., Mallinson C.B., Heitzman R.J., Plasma concentrations of ovarian hormones during the oestrous cycle of the sheep and cow, Journal of Endocrinology, 81, pp. 61-64, (1979)

[8]

Hess D.L., Schmidt A.M., Schmidt M.J., Reproductive cycle of the Asian elephant (Elephas maximus) in captivity, Biology of Reproduction, 28, pp. 767-773, (1983)

[9]

Hodges J.K., Henderson C., McNeilly A.S., Circulating oestrogen concentrations during pregnancy in the African elephant (Loxodonta africana), Journal of Reproduction and Fertility, 67, pp. 121-127, (1983)

[10]

Jainudeen M.R., Eisenberg J.F., Tilakeratne N., Oestrous cycle of the Asiatic elephant Elephas maximus, in captivity, Journal of Reproduction and Fertility, 27, pp. 321-328, (1971)

← 1 2 →