Haplodiploidy, sex-ratio adjustment, and eusociality. [PDF]
, 2013 Hamilton's "haplodiploidy hypothesis" holds that inflated sororal relatedness has promoted altruistic sib rearing in haplodiploids, potentially explaining their apparent predisposition to eusociality.
Gardner, A +3 more
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Human sex ratio at amniocentesis and at birth in Taiwan
Taiwanese Journal of Obstetrics & Gynecology, 2012 Objectives: An increase in the proportion of male-to-female live births has raised concerns in Taiwan. Disclosure of fetal sex during prenatal screening is not allowed by the Taiwan government.
I-Wen Lee +3 more
doaj +1 more source
The quantitative genetic basis of sex ratio variation in Nasonia vitripennis : a QTL study [PDF]
, 2010 Our understanding of how natural selection should shape sex allocation is perhaps more developed than for any other trait. However, this understanding is not matched by our knowledge of the genetic basis of sex allocation.
Shuker, DM +20 more
core +2 more sources
Inbreeding and selection on sex ratio in the bark beetle Xylosandrus germanus [PDF]
, 2011 Background: Local Mate Competition (LMC) theory predicts a female should produce a more female-biased sex ratio if her sons compete with each other for mates.
Keller, Laurent +19 more
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Climate influences fledgling sex ratio and sex-specific dispersal in a seabird. [PDF]
PLoS ONE, 2013 Climate influences the dynamics of natural populations by direct effects over habitat quality but also modulating the phenotypic responses of organisms' life-history traits. These responses may be different in males and females, particularly in dimorphic
Alvaro Barros +2 more
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Simultaneous failure of two sex-allocation invariants : implications for sex-ratio variation within and between populations [PDF]
, 2015 This research was supported by Wolfson College Cambridge (A.M.M.R.) and the Natural Environment Research Council (grant no. NE/K009524/1) (A.G.).Local mate competition (LMC) occurs when male relatives compete for mating opportunities, and may favour the ...
Rodrigues, Antonio, Gardner, Andy
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EVALUATION OF SEMEN SEX RATIO IN COOLED AND FROZEN SEMEN STRAWS BY REAL-TIME PCR [PDF]
Basrah Journal of Veterinary Research, 2016 The study was demonstrated on quantitative evaluation of SRY and ZFX gene of (120) semenstraws from 10 Holliston bull (60) straws in cooling state 5C° and 60 straws after deep freezingin liquid nitrogen) .
Baqer Ja’fer. Hassan +2 more
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Temperature-dependent sex determination in fish revisited: Prevalence a single sex ratio response pattern, and possible effects of climate change. [PDF]
, 2008 Ospina-Álvarez N, Piferrer F (2008) Temperature-Dependent Sex Determination in Fish Revisited: Prevalence, a Single Sex Ratio Response Pattern, and Possible Effects of Climate Change. PLoS ONE 3(7): e2837.
Piferrer, Francesc +7 more
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Digit Ratio (2D:4D): A Biomarker for Prenatal Sex Steroids and Adult Sex Steroids in Challenge Situations [PDF]
, 2014 Digit ratio (2D:4D) denotes the relative length of the second and fourth digits. This ratio is considered to be a biomarker of the balance between fetal testosterone (T) and estrogen (E) in a narrow window of early ontogeny.
Liam Kilduff +20 more
core +1 more source
Factors Determining Decline in Sex Ratio in Kuwaiti Population [PDF]
المجلة المصرية للسکـان وتنظيم الأسرة, 1985 Census data of kuwait show that the sex ratio among kuwaiti nationals has been declining. This paper examines the influence of varimus factors on sex ratio.
Mostafa El-Shalakani
doaj +1 more source