scholarly journals The Relation between the Hatching Time and the Sex-ratio in Chicks

1972 ◽  
Vol 9 (2) ◽  
pp. 70-78 ◽  
Author(s):  
KENJI ICHINOE ◽  
EIICHIRO OHTA ◽  
TOSHIO MAKABE ◽  
SHOZO SUZUKI
Keyword(s):  
Sex Ratio ◽  
Hatching Time

The Relation between the Hatching Time and the Sex-ratio in Japanese Quail

1972 ◽  
Vol 9 (2) ◽  
pp. 102-103
Author(s):  
Kenji Ichinoe ◽  
Osamu Yamamuro ◽  
Shozo Suzuki
Keyword(s):  
Sex Ratio ◽  
Japanese Quail ◽  
Hatching Time

scholarly journals The Relation between the Hatching Time and the Sex-Ratio in Chicks

1968 ◽  
Vol 5 (4) ◽  
pp. 190-197 ◽  
Author(s):  
KENJI ICHINOE ◽  
EIICHIRO OHTA ◽  
SHOZO SUZUKI
Keyword(s):  
Sex Ratio ◽  
Hatching Time

scholarly journals Long-Term Exposure to Benzo[a]Pyrene Affects Sexual Differentiation and Embryos Toxicity in Three Generations of Marine Medaka (Oryzias Melastigma)

2020 ◽  
Vol 17 (3) ◽  
pp. 970 ◽  
Author(s):  
Dong Sun ◽  
Qi Chen ◽  
Bo Zhu ◽  
Yu Lan ◽  
Shunshan Duan
Keyword(s):  
Sex Ratio ◽  
Sexual Differentiation ◽  
Endocrine Disorders ◽  
Marine Medaka ◽  
Offspring Sex Ratio ◽  
Reproductive Genes ◽  
Hatching Time ◽  
Embryo Toxicity ◽  
High Concentrations ◽  
Embryonic Toxicity

Benzo[a]pyrene (BaP) is a common environmental disrupting chemical that can cause endocrine disorders in organisms. However, the continued interference effects of BaP on multi-generation fish needs further research. In this study, we performed different periods (G1F1-3, G2F2-3, G3F3) of BaP exposure on marine medaka. We determined the embryo toxicity, and analyzed relative reproductive genes (ERα, cyp19a and vtg1) to predict the sexual differentiation of marine medaka. The results showed that high concentrations of BaP (200 μg·L−1) significantly delayed the hatching time of embryos. Moreover, medium/high concentrations of BaP (20 and 200 μg·L−1) prolonged the sexual maturity time of marine medaka. The relative gene expression of ERα, cyp19a and vtg1 were measured at 5 dpf of embryos. We found that BaP had significantly inhibited the expression of the genes related to female fish development. Consequently, there were more males in the offspring sex ratio at BaP exposure. Overall, BaP can cause embryonic toxicity and abnormal sexual differentiation, while the expression of related reproductive genes can effectively indicate the sex ratio.

scholarly journals The Relation between the Hatching Time and the Sex-Ratio in Chicks

1967 ◽  
Vol 4 (4) ◽  
pp. 201-206 ◽  
Author(s):  
KENJI ICHINOE ◽  
EIICHIRO OHTA ◽  
TOSHIO MAKABE ◽  
TATSUO ICHIGE ◽  
SHOZO SUZUKI
Keyword(s):  
Sex Ratio ◽  
Hatching Time

scholarly journals The Relationship between Hatching Time and Sex-ratio in Chicks

1973 ◽  
Vol 52 (4) ◽  
pp. 1584-1592 ◽  
Author(s):  
Kenji Ichinoe
Keyword(s):  
Sex Ratio ◽  
Hatching Time ◽  
The Relationship

scholarly journals The Relation between the Hatching Time and the Sex-Ratio in Chicks

1966 ◽  
Vol 3 (4) ◽  
pp. 197-200 ◽  
Author(s):  
KENJI ICHINOE ◽  
KUNIYASU YOSHIMOTO ◽  
SHOZO SUZUKI
Keyword(s):  
Sex Ratio ◽  
Hatching Time

Die unbehandelten Kranken: Ältere Männer mit Depression

2008 ◽  
Vol 27 (07) ◽  
pp. 617-619 ◽  
Author(s):  
M. Wittmann ◽  
E. Haen ◽  
H. Spießl ◽  
H. Hausner
Keyword(s):  
Sex Ratio ◽  
Epidemiologische Studien

ZusammenfassungZahlreiche epidemiologische Studien zeigen, dass sich das Geschlechterverhältnis der Prävalenz depressiver Erkrankungen ab der 6. Lebensdekade – also nach der weiblichen Menopause – wieder annähert. Wir haben untersucht, ob sich dieser epidemiologische Effekt auch in der stationären Versorgung abbildet. Unter Verwendung der AGATE-Stichtagsdaten der Jahre 2000 bis 2004, wurde der Zusammenhang zwischen Geschlecht und Alter bei stationär behandelten depressiven Patienten analysiert. Der Zusammenhang zwischen Geschlechterverhältnis und dem Alter wurde mithilfe des Korrelationskoeffizienten nach Spearman sowie mit χ2-Test untersucht. In der 5. und 6. Lebensdekade lag die Sex-Ratio F/M bei 1,7:1, sie stieg in der 7. Dekade auf 2,2:1 und in der 8. Dekade auf 2,6:1 an. Anders als aufgrund epidemiologischer Studien zu erwarten wäre, nähert sich in der stationär psychiatrischen Versorgung das Verhältnis depressiver Patienten im Alter nicht an. Depressive ältere Männer sind also im stationären Versorgungssystem unterrepräsentiert.

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