TY - JOUR
T1 - Antler cycle and endocrine parameters in male axis deer (Axis axis)
T2 - Seasonal levels of LH, FSH, testosterone, and prolactin and results of GnRH and ACTH challenge tests
AU - Bubenik, G. A.
AU - Brown, R. D.
AU - Schams, D.
N1 - Funding Information:
Acknowledgements-Authors would like to acknowledge the skilful technical assistance of Dr T. Dailey, J. Kidwell and V. Ramirez. The study was supported by the Caesar Kleberg Wildlife Research Institute in Kingsville, Texas and by NSERC, Canada.
PY - 1991
Y1 - 1991
N2 - 1. 1. Antler cycles of six adult male axis deer of southern Texas were relatively well synchronized within the herd. The old antlers were cast from December to March and regenerated antlers polished between March and June. The rutting season occurred in June and July. 2. 2. LH and FSH exhibited little seasonal variation (LH 0.7 - 1.3 ng/ml; FSH 32-65 ng/ml). Prolactin levels were lowest in December (20 ng/ml) and highest in June (115 ng/ml). Testosterone concentrations exhibited a distinct seasonal pattern: minimum in December (0.1 ng/ml) and maximum in May (1.75 ng/ml). 3. 3. After GnRH challenge (100 μg given i.m. in November), maximal LH levels (reached 40-60 min after injection), varied from 7.7 to 11.2 ng/ml, and T levels varied from 1.3 to 1.6 ng/ml. 4. 4. Twenty I.U. of ACTH (given in March), elevated cortisol levels from 4-8 μg/dl (pretreatment) to 16-21 μg/dl (140min post-administration).
AB - 1. 1. Antler cycles of six adult male axis deer of southern Texas were relatively well synchronized within the herd. The old antlers were cast from December to March and regenerated antlers polished between March and June. The rutting season occurred in June and July. 2. 2. LH and FSH exhibited little seasonal variation (LH 0.7 - 1.3 ng/ml; FSH 32-65 ng/ml). Prolactin levels were lowest in December (20 ng/ml) and highest in June (115 ng/ml). Testosterone concentrations exhibited a distinct seasonal pattern: minimum in December (0.1 ng/ml) and maximum in May (1.75 ng/ml). 3. 3. After GnRH challenge (100 μg given i.m. in November), maximal LH levels (reached 40-60 min after injection), varied from 7.7 to 11.2 ng/ml, and T levels varied from 1.3 to 1.6 ng/ml. 4. 4. Twenty I.U. of ACTH (given in March), elevated cortisol levels from 4-8 μg/dl (pretreatment) to 16-21 μg/dl (140min post-administration).
UR - http://www.scopus.com/inward/record.url?scp=0025851618&partnerID=8YFLogxK
U2 - 10.1016/0300-9629(91)90144-2
DO - 10.1016/0300-9629(91)90144-2
M3 - Article
C2 - 1679702
AN - SCOPUS:0025851618
SN - 0300-9629
VL - 99
SP - 645
EP - 650
JO - Comparative Biochemistry and Physiology -- Part A: Physiology
JF - Comparative Biochemistry and Physiology -- Part A: Physiology
IS - 4
ER -