Results 51 to 60 of about 1,236,441 (247)
Effect of age at photostimulation on sexual maturation in broiler breeder pullets.
Poultry Science, 2014 Genetic selection programs in broiler stocks have contributed to changes in the responsiveness of the broiler breeder female to nutritional factors. A study was conducted to investigate the effect of photostimulation (PS) age on sexual maturity traits in
A. Pishnamazi +3 more
semanticscholar +1 more source
Gut microbiota regulates the brain metabolism of sexually mature drones
Microbiology SpectrumPrevious studies have found that gut microbiota and metabolites may be crucial in insect sexual maturation. For example, during sexual maturity, the increased dopamine in the drone’s brain can affect its reproductive behavior, such as flight, mating, and
Jun Zhang +12 more
doaj +1 more source
Sexual maturation of Greek boys
Annals of Human Biology, 2002 Sexual maturation is dependent on genetic and environmental factors, therefore each ethnic group has to have its own normative data.This study describes the sexual maturation of Greek boys.We examined cross-sectionally 1266 healthy boys, aged 8-16 years. Pubertal staging in each boy was assessed according to Tanner's classification.
A, Papadimitriou +4 more
openaire +2 more sources
Aerobic fitness and biological and sociodemographic indicators in female school children
Revista Brasileira de Cineantropometria e Desempenho Humano, 2013 Aerobic fitness is an important health-related fitness component. The objective of this study was to analyze the influence of age, growth, body composition, sexual maturation and socioeconomic status on the aerobic fitness of female school children ...
Roberto Régis Ribeiro +5 more
doaj +1 more source
Sexually Matured Female Mice showed Higher γ-Linolenic Acid (GLA) in the Muscle Tissue
Journal of Animal Reproduction and Biotechnology, 2015 The sexual maturation occurred by the changes of steroid hormones was known to sex-dependently and/or agedependently regulate the lipid metabolism in various animal species.
Chang Seok Park +2 more
doaj +1 more source
Poultry ScienceSexual maturity is a pivotal reproductive trait in laying hens because it is directly related to egg production. The age at first egg is a definitive indicator of sexual maturity attainment in laying hens. Most Chinese indigenous chicken breeds exhibit a
Jiale Zhang +6 more
doaj +1 more source
Marine Biotechnology, 2013 In Atlantic salmon aquaculture, early sexual maturation represents a major problem for producers. This is especially true for grilse, which mature after one sea winter before reaching a desirable harvest weight, rather than after two sea winters.
Alejandro P. Gutiérrez +5 more
semanticscholar +1 more source
Ecology and EvolutionIndividuals can adjust allocation strategies based on intrinsic and extrinsic factors. Variation in nutritional status during sexual maturation and resource acquisition during breeding may affect life history functions and trade‐offs.
Wenxia Wang +4 more
doaj +1 more source
Genome-wide circular RNAs signatures involved in sexual maturation and its heterosis in chicken
Journal of Integrative AgricultureSexual maturation heterosis has been widely exploited in animal crossbreeding. However, the underlying mechanism has been rarely explored in chicken. In the present study, we performed the reciprocal crossing between White Leghorn and Beijing You chicken
Yuanmei Wang +12 more
doaj +1 more source
BMC Pediatrics, 2013 BackgroundThe objective of this study was to determine body fat percentiles of adolescents in the city of São Paulo, Brazil, according to gender, age, and sexual maturation.MethodsThis study involved 4,690 adolescents aged 10–15 years across 31 schools ...
I. de Pádua Cintra +5 more
semanticscholar +1 more source