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Offspring sex ratio in domestic goats: Trivers-Willard out of natural selection
maternal age parental investment sex allocation
2015/7/7
In the present
study we have analyzed an extensive data set on the secondary sex ratio (SSR) including 59 335 goat kids born
in 30 633 litters to 11 644 mothers on farms all over the Czech Republi...
Civil War, Marriage Ban and Sex Ratio: Impute the Prime-age Sex Ratio in Post-War Taiwan Using Censored Data
civil war marriage ban sex ratio marriage squeeze China Taiwan
2015/1/22
The civil war between the Nationalists and the Communists in China during 1945-1949 resulted in an enormous influx of immigrants to Taiwan, majority of who were single male soldiers in their 20s or 30...
Could changes in reported sex ratios at birth during China's 1958-1961 famine support the adaptive sex ratio adjustment hypothesis?
China famine sex ratio at birth
2014/11/25
Background: The adaptive sex ratio adjustment hypothesis suggests that when mothers are in poor conditions the sex ratio of their offspring will be biased towards females. Major famines provide opport...
MATERNAL AGE AT BIRTH DELIVERY, BIRTH ORDER AND SECONDARY SEX RATIO IN THE OLD ORDER AMISH OF LANCASTER COUNTY
Maternal Age at Delivery Birth Order Secondary Sex Ratio
2014/11/6
The observation that more boys were born than girls was noted in the late 1660’s. Recent studies suggest the secondary sex ratio (SSR) is declining in industrialized countries. SSR is proposed as a se...
Determination of Sperm Sex Ratio in Bovine Semen Using Multiplex Real-time Polymerase Chain Reaction
Sex Determination Sexed Semen Multiplex Real-time polymerase chain reaction
2016/5/17
Gender selection is important in livestock industries; for example, female calves are required in the dairy industry. Sex-sorted semen is commonly used for the production of calves of the desired gend...
STUDY OF SEX RATIO,ABO AND Rh BLOOD GROUPS DISTRIBUTION IN SOME HAEMATOLOGICAL AND LYMPHATIC DISEASES IN IRAN
Hematological diseases Lymphatic diseases IRAN
2009/12/30
Associations of some hematological and lymphatic diseases with sex and ABO and Rh blood groups were studied in 2579 patients, compared with a control group of 126332 individuals, by the use of clinica...
SEX RATIO IN SNAIL KILLING FLIES SEPEDON SPHEGEA (FABRICIUS) (INSECTA, DIPTERA, SCIOMYZIDAE)
S.sphegea sex ratios genus
2009/12/29
The following three procedures have been used to determine the sex ratio of S.sphegea. The fly is one of the two Iranian species of the genus Sepedon which is fairly dominant in the focus area of Schi...
SEX RATIO IN SNAIL KILLING FLIES SEPEDON SPHEGEA (FABRICIUS) (INSECTA, DIPTERA, SCIOMYZIDAE)
S.sphegea sex ratios genus
2009/12/29
The following three procedures have been used to determine the sex ratio of S.sphegea. The fly is one of the two Iranian species of the genus Sepedon which is fairly dominant in the focus area of Schi...
How can economic schemes curtail the increasing sex ratio at birth in China?
sex ratio at birth sex-selection sex-selective potency son preference value of child
2008/12/18
Fertility decline, driven by the one-child policy, and son preference have contributed to an alarming difference in the number of live male and female births in China. We present a quantitative model ...
Gonad Development and Sex Ratio of Sharptooth Catfish (Clarias gariepinus Burchell, 1822) Cultured under Laboratory Conditions
Clarias gariepinus histology gametogenesis morphology sex ratio
2010/3/26
In the present work, gonad development and sex ratio of sharptooth catfish (Clarias gariepinus) cultured under laboratory conditions over 365 days from hatching were investigated histologically and mo...
Age, Growth, and Sex Ratio of Golden Grey Mullet, Liza aurata (Risso, 1810) in Homa Lagoon (İzmir Bay, Aegean Sea)
Grey mullet (Liza aurata) Homa Lagoon age growth sex ratio
2010/3/26
In this study, age, growth, and sex ratio of 342 golden grey mullets, which were caught in fish traps during fishing season were determined. The samples were between 7.5 and 39.5 cm in length and were...
Investigation of Fecundity and Sex Ratio in the Parasitoid Bracon hebetor Say (Hymenoptera: Braconidae) in Relation to Parasitoid Age
Host parasitoid fecundity sex ratio Galleria mellonella Ephestia kuehniella
2010/3/29
The effect of parasitoid age on fecundity and sex ratio in Bracon hebetor Say (Hymenoptera: Braconidae) was examined at 26 ± 2 ºC and 60 ± 5% relative humidity. Galleria mellonella (L.) and Ephes...
Estimation of Size Frequency Distribution, Sex Ratio and Length-Weight Relationship of Hilsa (Tenualosa ilisha) in the Bangladesh Water
Size frequency length-weight relationship Tenualosa ilisha Bangladesh
2010/11/8
The study is an attempt to estimate the size frequency distribution, sex ratio and length-weight relationship of hilsa (Tenualosa ilisha) by the SPSS programme from length-weight data collected from B...
EFFECT OF THE SEX RATIO ON THE EGG FERTILITY OF MUSCOVY DUCK (CAIRINA MOSHCATA)
Muscovy duck sex ratio hierarchial relations
2010/11/30
Study was carried out for establishing the optimal sex ratio in Muscovy duck breeding. Four variants of the ratio of the male to the female individuals were tested: 1:5(I), 1:6(II), 1:7(III) and 1:8(I...
The Effects of Cold Storage on the Adult Longevity, Fecundity and Sex Ratio of Apanteles galleriae Wilkinson (Hym.: Braconidae)
Parasitoid Apanteles galleriae Cold storage Longevity Fecundity Sex ratio Biological control
2010/3/30
The effect of cold storage on the adult longevity, fecundity and sex ratio of Apanteles galleriae Wilkinson, a koinobiont, solitary and early instar larval endoparasitoid of the Small Wax Moth Achoria...