scholarly journals Serum estradiol-17β and testosterone levels during silvering in wild Japanese eel Anguilla japonica

2003 ◽  
Vol 136 (4) ◽  
pp. 913-920 ◽  
Author(s):  
Yu-San Han ◽  
I-Chiu Liao ◽  
Wann-Nian Tzeng ◽  
Yung-Sen Huang ◽  
John Yuh-Lin Yu
Keyword(s):  
Anguilla Japonica ◽  
Japanese Eel ◽  
Serum Estradiol ◽  
Testosterone Levels ◽  
Estradiol 17Β

Hachimijiogan Changes Serum Hormonal Circumstance and Improves Spermatogenesis in Oligozoospermic Men

1986 ◽  
Vol 14 (01n02) ◽  
pp. 37-45 ◽  
Author(s):  
S. Usuki
Keyword(s):  
Sperm Motility ◽  
Moderate Increase ◽  
Serum Estradiol ◽  
Remarkable Increase ◽  
Testosterone Levels ◽  
Fertility Index ◽  
Significant Change ◽  
Estradiol 17Β

28 men with oligozoospermia and 7 with azoospermia received 7.5 g of Hachimijiogan, daily for 8 to 28 weeks. Examinations of semen in oligozoospermic men after treatment revealed a remarkable increase in number (78%) and moderate increase in sperm motility (53%) and in volume (56%), and fertility index was also remarkably improved, whereas no improvement was found in azoospermic men. Furthermore, serum estradiol-17β level was significantly increased (P<0.005) after treatment, while LH, FSH, prolactin and testosterone levels in sera showed no significant change. These results suggest that Hachimijiogan increases serum estradiol-17 β levels and improves spermatogenesis in oligozoospermic men.

scholarly journals Trans-omics analyses revealed differences in hormonal and nutritional status between wild and cultured female Japanese eel (Anguilla japonica)

2018 ◽  
Author(s):  
Masato Higuchi ◽  
Miyuki Mekuchi ◽  
Takeshi Hano ◽  
Hitoshi Imaizumi
Keyword(s):  
Anguilla Japonica ◽  
Japanese Eel ◽  
Sex Hormone Binding Globulin ◽  
Carbohydrate Diet ◽  
High Accumulation ◽  
Commercial Diet ◽  
High Carbohydrate ◽  
The Brain ◽  
Estradiol 17Β

AbstractLong-term stock decline in the Japanese eel (Anguilla japonica) is a serious issue. To reduce natural resource utilization in Japan, artificial hormonal induction of maturation and fertilization in the Japanese eel has been intensively studied. Recent experiment on feminized (by feeding a commercial diet containing estradiol-17β for first half year) cultured eels have shown ovulation problem, which is seldom observed in captured wild eels. In this study, we tried to investigate causes of ovulation problem frequently seen in cultured eels by comparative trans-omics analyses.The omics data showed low growth hormone and luteinizing hormone transcription levels in the brain and low sex hormone–binding globulin transcription levels in the liver of the cultured eels. In addition, we found high accumulation of glucose-6-phosphate and, maltose in the cultured eel liver. We also found that docosahexaenoic (DHA) acid, eicosapentaenoic acid (EPA) and arachidonic acid (ARA) ratios in cultured eels were quite different from wild eels.The data suggested that ovulation problem is due to prolonged intake of a high-carbohydrate diet and/or unbalanced DHA/EPA/ARA ratios in diet.

scholarly journals Effects of Water Temperature and Estradiol-17β on the Sex Ratio and Growth of the Japanese Eel, Anguilla japonica

2013 ◽  
Vol 23 (12) ◽  
pp. 1454-1459 ◽  
Author(s):  
Dae-Jung Kim ◽  
Nam-Sil Lee ◽  
Shin-Kown Kim ◽  
Bae-Ik Lee ◽  
Ki-Baik Seong ◽  
...  
Keyword(s):  
Sex Ratio ◽  
Water Temperature ◽  
Anguilla Japonica ◽  
Japanese Eel ◽  
Estradiol 17Β

Isolation of two types of cDNA encoding growth hormone receptor-like genes in the Japanese eel, Anguilla japonica

2002 ◽  
Vol 68 (sup1) ◽  
pp. 959-960 ◽  
Author(s):  
YUICHI OZAKI ◽  
HARUHISA FUKADA ◽  
YUKINORI KAZETO ◽  
SHINJI ADACHI ◽  
AKIHIKO HARA ◽  
...  
Keyword(s):  
Growth Hormone ◽  
Hormone Receptor ◽  
Growth Hormone Receptor ◽  
Anguilla Japonica ◽  
Japanese Eel

Correlation Between PTEN and VEGF Expressions During the Development of Gas Gland in Japanese Eel (Anguilla japonica) Stimulated by Exogenous Hypophyseal Factors

2010 ◽  
Vol 1 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Yi-Fan Chen ◽  
Shan-Ru Jeng ◽  
Ming-Chyuan Chen ◽  
Jin-Chywan Gwo ◽  
Yung-Sen Huang
Keyword(s):  
Anguilla Japonica ◽  
Japanese Eel ◽  
Gas Gland
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