Sex Ratios
Are sex ratios in wild European sea bass (Dicentrarchus labrax) populations biased?
... years, sex ratio was biased towards ...level sex ratios in young ...age-group sex ratios was evidenced in ...group sex ratios reflected excess of females in old age groups ...
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Sex ratios of the tick Ixodes arboricola are strongly female-biased, but there are no indications of sex-distorting bacteria
... concerning sex ratios in ixodid ticks is very im- portant, because in the adult stage − in contrast to males that do not feed − female ticks feed for several days, which strongly increases the chance for ...
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New data on the bats (Chiroptera) of Martinique island (Lesser Antilles), with an emphasis on sexual dimorphism and sex ratios
... Tadarida brasiliensis (Brazilian free-tailed bat) Tadarida is the least frequently caught molossid, with only 23 individuals (or 0.9% out of 2613 bats). The sex ratio seems equal (11 females and 12 males) but our ...
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Comparative effects of a natural androgen, 11β hydroxyandrostenedione, and a synthetic androgen, 17α-methyltestosterone, on the sex ratios of Oreochromis niloticus
... As the steroidogenesis in the period of gonadal differentiation has not been extensively studied in teleost fish, par- ticularly in tilapia (Baroiller 1988a and b; Baroiller et al.[r] ...
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Comparative effects of a natural androgen, 11β hydroxyandrostenedione, and a synthetic androgen, 17α-methyltestosterone, on the sex ratios of Oreochromis niloticus
... L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignemen[r] ...
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Modification of population sex ratios by domestication and artificial selection in the European sea bass (Dicentrarchus labrax L.)
... 2. Estimation of genetic parameters of growth & sex (h 2 , r A ) in G1 fish by covariance between relatives (REML) 3. experimental selection for growth on G1 fish, P=5% on body length (BL)Î20 S males, + 20 ...
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The role of density in sex determination of the European eel and the identification of early sex markers
... Using qPCR, we detected testis-specific expressions of pre-mir202, dmrt1, amh, and gsdf and ovary-specific expressions were obtained for aromatase, zar1, zp3 and foxn5. We showed that gene expressions in the gonad of ...
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Point actuel sur la signification des ratios agonistes / antagonistes au membre inférieur
... training on eversion to inversion strength ratios in subjects with unilateral functional ankle instability, Br J Sports Med 2003;37:410-415. [6] Pontaga I. Ankle joint evertor-invertor muscle torque ratio decrease ...
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Sex Differences in White Matter Microstructure in the Human Brain Predominantly Reflect Differences in Sex Hormone Exposure.
... a sex difference in FA , cannot be ruled ...proposed sex hormone effects are most pronounced in WM microstructural characteristics related to ...proposed sex hormone effects. These factors may ...
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Analysis of signal transduction networking using activation ratios
... The analysis described here was developed assuming steady state in the signaling system. This simplification greatly facilitates the overall analysis development, since concentrations of enzyme-substrate complexes can be ...
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Activation Ratios For Reconstruction Of Signal Transduction Networks
... For each protein of interest in the network, both the free active and free active should be measured at several concentrations of the input stimulus. Using the analysis described above, these measurements can be used to ...
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Factors associated with alcohol use before sex among HIV-negative female sex workers in Zambia
... Female sex workers (FSW) are at high risk of HIV ...to sex can compound this ...having sex under the influence of alcohol among Zambian ...had sex under the influence of alcohol in the ...
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Sex Chromosome Degeneration by Regulatory Evolution
... Simulations for lower values of mutation rates and strength of selection against deleterious alleles 206.. are shown on Fig.[r] ...
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Effect of high temperature on sex determination and sex differentiation process in African catfish Clarias gariepinus
... 3. Piferrer F, Ribas L, Díaz N (2012) Genomic Approaches to Study Genetic and Environmental Influences on Fish Sex Determination and Differentiation. Marine Biotechnology, 14, 591-604 . 4. Rougeot, C., Krim, A., ...
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Sex differences in cocaine use in rats
... Materials and Methods Animals The animal care committee of the Université de Montréal approved all experimental procedures, and these followed the guidelines of the Canadian Council on Animal Care. Adult male (225-250 ...
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Sex Therapy for Premature Ejaculation: An Overview
... advantages of such a methodology is that it can be used for standardized measures of effect sizes, provided, of course, that the ad hoc indicators were reported. Table 2 reports effect sizes (Cohen's d) related to the ...
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Sex chromosome quadrivalents in oocytes of the African pygmy mouse Mus minutoides that harbors non-conventional sex chromosomes
... of sex-reversed XY females that carry a variant Y chromosome (Y d ) in which Zfy2 is transcriptionally repressed is comparable to that of X0 females (Vernet et ...these sex chromosome modifications usually ...
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Transmissible cancer and the evolution of sex
... One of the greatest enigma in evolutionary biology is the high prevalence (>99%) of sexual reproduction among eukaryotes [ 1 , 2 ]. Because sexual reproduction requires males that do not produce offspring, an asexual ...
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Effects of high rearing temperatures on the sex ratio of progeny from sex reversed males of Oreochromis niloticus
... L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignemen[r] ...
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Identification of the master sex determining gene in Northern pike (Esox lucius) reveals restricted sex chromosome differentiation
... the sex chromosome, but a nascent sex locus is likely not the explanation for the 429 restricted region suppression of recombination between the X and Y chromosome of ...homomorphic sex chromosomes ...
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