EFFECTS OF ACUTE VERSUS SUSTAINED ADMINISTRATION OF GNRHA ON GTH RELEASE AND OVULATION IN THE RAINBOW-TROUT, ONCORHYNCHUS-MYKISS

被引：53

作者：

BRETON, B ^{[1
]}

WEIL, C ^{[1
]}

SAMBRONI, E ^{[1
]}

ZOHAR, Y ^{[1
]}

机构：

[1] NATL CTR MARICULTURE,IOLR,ELAT,ISRAEL

来源：

AQUACULTURE | 1990年 / 91卷 / 3-4期

关键词：

D O I：

10.1016/0044-8486(90)90201-W

中图分类号：

S9 [水产、渔业];

学科分类号：

0908 ;

摘要：

The effects of different forms of GnRHa (sustained vs. acute) on the stimulation of gonadotropin secretion and the rate of ovulation were investigated in the rainbow trout, Oncorhynchus mykiss. A biodegradable sustained release form of DTrp6 LH-RH induced a progressive rise in the gonadotropin plasma levels in a dose-dependent manner. The stimulation of gonadotropin secretion was maintained for 3 weeks. All fish ovulated within 5 days after injection using a high dosage (50 μg/kg body weight) whereas with the lower dosages (25 and 12.5 μg/kg body weight) 100% ovulation was reached after 8 days. In contrast, acute injections of GnRHa (20 μg/kg body weight) induced a transient stimulation of gonadotropin secretion. Ovulation rates were first accelerated within 8-10 days and then remained stable but they did not reach 100% 26 days after the injection. At that time the rate of ovulation in the control group had increased to 70%. These results are discussed, along with a comparison of variability of egg quality with treatments. © 1990.

引用

页码：373 / 383

页数：11

共 21 条

[1] ADVANCEMENT AND SYNCHRONIZATION OF SPAWNING IN SALMO-GAIRDNERI AND SALMO-TRUTTA FOLLOWING ADMINISTRATION OF LRH-A COMBINED OR NOT WITH PIMOZIDE [J].