2,763 results match your criteria maturing males


Large inter-stock differences in catch size-at-age of mature Atlantic salmon observed by using genetic individual origin assignment from catch data.

PLoS One 2021 6;16(4):e0247435. Epub 2021 Apr 6.

Department of Biology, University of Turku, Turku, Finland.

Genetic individual assignment of river stock of origin of mixed stock catch fish offers a tool to analyze size differences among river stocks. Data on the genetically identified river stock of origin of individual fish from commercial mixed stock catches were used to compare the catch size-at-age of mature Atlantic salmon catch fish (Salmo salar) from different rivers in the Baltic Sea. In this application of genetic mixed stock modeling, individual assignments of the river stock of origin were analyzed together with length- and weight-at-age data for individual catch fish. Read More

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Modeling and predicting the growth of indigenous Harnai sheep in Pakistan: non-linear functions and MARS algorithm.

Trop Anim Health Prod 2021 Apr 6;53(2):248. Epub 2021 Apr 6.

Faculty of Agriculture, Department of Animal Science, Biometry and Genetics Unit, Igdir University, Igdir, Turkey.

Five non-linear functions, i.e. Gompertz, Logistic, Negative exponential, Brody and Bertalanffy, and multivariate adaptive regression splines (MARS) data mining algorithm were implemented with the objective to describe the body weight-age relationship of Harnai sheep of Balochistan, Pakistan. Read More

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From Talent Identification to (NBB): Multifactorial Analysis of the Career Progression in Youth Brazilian Elite Basketball.

Front Psychol 2021 16;12:617563. Epub 2021 Mar 16.

Faculty of Physical Education and Sports, Federal University of Juiz de Fora, Juiz de Fora, Brazil.

This study examined individual, task, and environmental constraints that influence the career progression of youth Brazilian elite basketball players and the probability of reaching (NBB) and to determine if the association of the relative age effect (RAE) is a key factor in the career progression. The sample consisted of 4,692 male players who were registered to participate in at least one U15, U17, or U22 youth Brazilian basketball championship between 2004 and 2018. Athletes who reached a high-performance level were coded like NBB players (9. Read More

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Competitive ability determines coalition participation and partner selection during maturation in wild male chimpanzees ().

Behav Ecol Sociobiol 2020 Jul 22;74(7). Epub 2020 Jun 22.

Department of Anthropology, University of New Mexico, Albuquerque, NM, USA.

Social mammals often live in groups in which a dominance hierarchy is an important determinant of access to mates. In addition to competing individually, males may form coalitions of two or more to attack or intimidate rivals. Coalition formation could be particularly advantageous for adolescent males by helping them compensate for their physical and social immaturity. Read More

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Trumpet sounds emitted by male sperm whales in the Mediterranean Sea.

Sci Rep 2021 Mar 12;11(1):5867. Epub 2021 Mar 12.

Department of Environmental Biology, Sapienza University of Rome, Rome, Italy.

Sperm whale trumpets are sounds only occasionally documented, with a well recognisable and stereotyped acoustic arrangement. This study investigated the acoustic features of the trumpets and the context in which these sounds were recorded, using acoustic data collected over 22 years, in the Pelagos Sanctuary area (North-Western Mediterranean Sea). Analysed trumpets (n = 230), recorded at the beginning of a dive after the whale fluke-up, comprised a series of acoustic units organized in short sequences. Read More

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Farmers' perceptions of navy bean (Phaseolus vulgaris L.) production constraints, preferred traits and farming systems and their implications on bean breeding: a case study from South East Lowveld region of Zimbabwe.

J Ethnobiol Ethnomed 2021 Mar 12;17(1):13. Epub 2021 Mar 12.

University of Zimbabwe, Mt Pleasant, Harare, Zimbabwe.

Background: Navy bean is an important legume crop in Zimbabwe. Although its production in Zimbabwe is limited by multiple constraints including biotic, abiotic and socio-economic, there is no documented evidence. Thus, this study aimed at identifying farmers' production constraints, preferred traits and cultivars of navy bean, and strategies used to mitigate some of these constraints. Read More

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Growth and maturity status of young male table tennis players.

Res Sports Med 2021 Mar 4:1-19. Epub 2021 Mar 4.

University of Louisville, School of Public Health and Information Sciences, Louisville, Kentucky, USA.

A maturity-associated gradient among adolescent athletes in many sports tends to favour early maturing participants. This study was aimed to describe inter-individual variance in growth and skeletal maturation among male youth table tennis. The sample included 99 players registered in competitive clubs for at least 2 years. Read More

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Injuries in youth football and the relationship to player maturation: An analysis of time-loss injuries during four seasons in an English elite male football academy.

Scand J Med Sci Sports 2021 Feb 9. Epub 2021 Feb 9.

Department of Orthopedic Surgery, Sports Orthopedic Research Center Copenhagen (SORC-C), Copenhagen University Hospital, Amager-Hvidovre, Copenhagen, Denmark.

A better insight into injuries in elite-youth football may inform prevention strategies. The purpose of this prospective cohort study was to investigate the frequency, incidence, and pattern of time-loss injuries in an elite male football academy, exploring injuries in relation to age and maturation status. Across four consecutive playing seasons, playing exposure and injuries to all academy players (U'9 to U'21) were recorded by club medical staff. Read More

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February 2021

[Age dynamic of the motor evoked potential from the tongue in healthy persons.]

Adv Gerontol 2020 ;33(5):1002-1006

Pediatric Research and Clinical Center for Infectious Diseases, 9 Prof. Popov str., St. Petersburg 197022, Russian Federation, e-mail:

Our aim was to determine parameters of motor evoked potential (MEP), elicited by the transcranial magnetic stimulation (TMS) from the tongue in healthy persons of different age. 62 neurologically healthy individuals without any speech problems (age range from 2 years old to 75 years, 34 females & 28 males) were enrolled. All underwent diagnostic TMS, single-pulse protocol, 90-sm round coil, Neiro-MS-D device. Read More

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February 2021

General anaesthesia during infancy reduces white matter micro-organisation in developing rhesus monkeys.

Br J Anaesth 2021 04 3;126(4):845-853. Epub 2021 Feb 3.

Department of Psychiatry University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; Department of Computer Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.

Background: Non-human primates are commonly used in neuroimaging research for which general anaesthesia or sedation is typically required for data acquisition. In this analysis, the cumulative effects of exposure to ketamine, Telazol® (tiletamine and zolazepam), and the inhaled anaesthetic isoflurane on early brain development were evaluated in two independent cohorts of typically developing rhesus macaques.

Methods: Diffusion MRI scans were analysed from 43 rhesus macaques (20 females and 23 males) at either 12 or 18 months of age from two separate primate colonies. Read More

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Galanin isoforms by alternative splicing: Structure, expression, and immunohistochemical location in the gonads of European sea bass.

Gen Comp Endocrinol 2021 May 3;305:113730. Epub 2021 Feb 3.

Laboratory of Comparative Endocrinology and Integrative Biology, Centre of Marine Sciences (CCMAR), Faro, Portugal. Electronic address:

Galanin (Gal) is a neuropeptide with multiple functions that is widely expressed in the central and peripheral nervous systems of vertebrates. Anatomical and functional evidence suggests a possible role in regulating reproduction in fishes. To test this possibility, we have isolated and characterized two gal alternative transcripts in European sea bass (Dicentrarchus labrax) that encode two prepropeptides, respectively of 29 (gal_MT853221) and 53 (gal_MT853222) amino acids. Read More

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Parallel in vivo analysis of large-effect autism genes implicates cortical neurogenesis and estrogen in risk and resilience.

Neuron 2021 03 25;109(5):788-804.e8. Epub 2021 Jan 25.

Department of Psychiatry and Behavioral Sciences, UCSF Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA 94143, USA; Quantitative Biosciences Institute (QBI), University of California, San Francisco, San Francisco, CA 94143, USA; Langley Porter Psychiatric Institute, University of California, San Francisco, San Francisco, CA 94143, USA. Electronic address:

Gene Ontology analyses of autism spectrum disorders (ASD) risk genes have repeatedly highlighted synaptic function and transcriptional regulation as key points of convergence. However, these analyses rely on incomplete knowledge of gene function across brain development. Here we leverage Xenopus tropicalis to study in vivo ten genes with the strongest statistical evidence for association with ASD. Read More

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Inhibition of T-Cells by Cyclosporine A Reduces Macrophage Accumulation to Regulate Venous Adaptive Remodeling and Increase Arteriovenous Fistula Maturation.

Arterioscler Thromb Vasc Biol 2021 03 21;41(3):e160-e174. Epub 2021 Jan 21.

Vascular Biology and Therapeutics Program (Y.M., G.K., J. Liu, L.G., J. Langford, M.G., X.G., R.T., B.Y., A.D.), Yale School of Medicine, New Haven, CT.

Objective: Arteriovenous fistulae (AVF) are the preferred vascular access for hemodialysis, but the primary success rate of AVF remains poor. Successful AVF maturation requires vascular wall thickening and outward remodeling. A key factor determining successful AVF maturation is inflammation that is characterized by accumulation of both T-cells and macrophages. Read More

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Age-Related Increases in Posterior Hippocampal Granularity Are Associated with Remote Detailed Episodic Memory in Development.

J Neurosci 2021 Feb 18;41(8):1738-1754. Epub 2020 Dec 18.

Columbia University, New York, New York 10027.

Episodic memory is critical to human functioning. In adults, episodic memory involves a distributed neural circuit in which the hippocampus plays a central role. As episodic memory abilities continue to develop across childhood and into adolescence, studying episodic memory maturation can provide insight into the development and construction of these hippocampal networks, and ultimately clues to their function in adulthood. Read More

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February 2021

Estrogen and sex-dependent loss of the vocal learning system in female zebra finches.

Horm Behav 2021 Mar 23;129:104911. Epub 2021 Jan 23.

Department of Neurobiology, Duke University Medical Center, Durham, NC 27710, USA; Laboratory of Neurogenetics of Language, The Rockefeller University, New York, NY 10065, USA; The Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA. Electronic address:

Sex hormones alter the organization of the brain during early development and coordinate various behaviors throughout life. In zebra finches, song learning is limited to males, with the associated song learning brain pathways only maturing in males and atrophying in females. While this atrophy can be prevented by treating females with exogenous estrogen during early post-hatch development, the requirement of estrogen during normal male song system development is uncertain. Read More

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The effect of leucaena hay as a source of effective fibre and nutrients in diets with forage palm for finishing sheep in semi-arid regions.

Anim Sci J 2021 Jan;92(1):e13508

Department of Agrarian and Environmental Sciences, Federal University of Maranhão, Chapadinha, Maranhão State, Brazil.

The present study was conducted to evaluate the intake, digestibility and nitrogen balance of diets for finishing sheep, containing leucaena hay as a source of effective fibre and forage palm. Twenty-one male sheep were used in a randomized block design with three treatments, represented by total diets, where the forage was leucaena hay and forage palm in natura in proportions 350:650, 450:550 and 550:450 g/kg respectively. For the pH and NH -N in the ruminal fluid, and urea in the blood serum, plots split in time were adopted. Read More

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January 2021

Performance of Black Bengal goat: a 50-year review.

Authors:
Md Emran Hossain

Trop Anim Health Prod 2021 Jan 5;53(1):71. Epub 2021 Jan 5.

Department of Animal Science and Nutrition, Faculty of Veterinary Medicine, Chattogram Veterinary and Animal Sciences University, Zakir Hossain Road, Khulshi, Chattogram, 4225, Bangladesh.

Black Bengal goat (BBG) is the most widely recognized legacy goat breed in Bangladesh. The breed is black in color yet likewise earthy, white, or dim colors additionally found. The breed has medium body size with grown-up weight 25-30 kg, little horns, short legs, and tight body structure. Read More

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January 2021

Longitudinal smoking patterns and adult cardiometabolic risk among African Americans.

Health Psychol 2021 Jan;40(1):51-61

Center for Pediatric Psychology, Department of Psychology, Oklahoma State University.

Objective: To better understand mechanisms influencing health in African Americans (AAs), the aims of this study were (a) to identify longitudinal cigarette smoking classes among AAs across adolescence and into young adulthood; (b) to identify risk factors for smoking and how cardiometabolic health in adulthood differs by smoking class; and (c) to investigate whether smoking mediates the relation between adolescent risk factors and adult cardiometabolic health.

Method: This study used 4 waves of nationally representative data, restricted to an AA subsample (N = 2,009). Participants self-reported on multilevel risk factors in adolescence and smoking across adolescence and young adulthood; cardiometabolic risk was assessed in adulthood. Read More

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January 2021

Biological Maturity Status in Elite Youth Soccer Players: A Comparison of Pragmatic Diagnostics With Magnetic Resonance Imaging.

Front Sports Act Living 2020 15;2:587861. Epub 2020 Dec 15.

Department of Sport Psychology and Research Methods, Institute of Sports Science, Eberhard Karls University of Tübingen, Tübingen, Germany.

The influence of biological maturity status (BMS) on talent identification and development within elite youth soccer is critically debated. During adolescence, maturity-related performance differences within the same age group may cause greater chances of being selected for early maturing players. Therefore, coaches need to consider players' BMS. Read More

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December 2020

Comparative transcriptome analysis of three gonadal development stages reveals potential genes involved in gametogenesis of the fluted giant clam (Tridacna squamosa).

BMC Genomics 2020 Dec 7;21(1):872. Epub 2020 Dec 7.

Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Science, 164 West Xingang Road, Guangzhou, 510301, China.

Background: Gonad development and differentiation is an essential function for all sexually reproducing species, and many aspects of these developmental processes are highly conserved among the metazoa. However, the mechanisms underlying gonad development and gametogenesis remain unclear in Tridacna squamosa, a large-size bivalve of great ecological value. They are protandrous simultaneous hermaphrodites, with the male gonad maturing first, eventually followed by the female gonads. Read More

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December 2020

Association of Cumulative Paternal Early Life Stress With White Matter Maturation in Newborns.

JAMA Netw Open 2020 11 2;3(11):e2024832. Epub 2020 Nov 2.

FinnBrain Birth Cohort Study, Turku Brain and Mind Center, Institute of Clinical Medicine, University of Turku, Turku, Finland.

Importance: Early life stress (ELS) has been shown to affect brain development and health outcomes. Recent animal studies have linked paternal early stress exposures with next-generation outcomes. Epigenetic inheritance through the male germline has been suggested to be one of the mechanisms. Read More

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November 2020

A multi-trajectory analysis of commonly co-occurring mental health issues across childhood and adolescence.

Eur Child Adolesc Psychiatry 2020 Nov 16. Epub 2020 Nov 16.

Jacobs Center for Productive Youth Development, University of Zurich, Zurich, Switzerland.

Developmental trajectories of mental health issues can often be usefully summarised in a small number of clinically meaningful subtypes. Given the high levels of heterotypic and homotypic comorbidity in child and adolescent mental health symptoms, we explored whether it was possible to identify clinically meaningful developmental subtypes of multiple commonly co-occurring mental health issues. We evaluated the combined developmental trajectories of the most common and commonly co-occurring child and adolescent mental health issues: attention-deficit/hyperactivity disorder (ADHD), internalising, and externalising symptoms in a normative sample of youth with data (n = 1620) at ages 7, 8, 9, 10, 11, 12, 13 and 15 using group-based multi-trajectory modelling. Read More

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November 2020

Development of supermale and all-male Atlantic salmon to research the vgll3 allele - puberty link.

BMC Genet 2020 11 12;21(1):123. Epub 2020 Nov 12.

Institute of Marine Research (IMR), Matre Aquaculture Research Station, 5984, Matredal, Norway.

Background: Farmed Atlantic salmon are one of the most economically significant global aquaculture products. Early sexual maturation of farmed males represents a significant challenge to this industry and has been linked with the vgll3 genotype. However, tools to aid research of this topic, such as all-male and clonal fish, are still lacking. Read More

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November 2020

Maturity-related developmental inequalities in age-group swimming: The testing of 'Mat-CAPs' for their removal.

J Sci Med Sport 2021 Apr 16;24(4):397-404. Epub 2020 Oct 16.

Sydney School of Health Sciences, Faculty of Medicine & Health, The University of Sydney, Australia. Electronic address:

Objectives: To (1) examine the association between maturity timing and performance-based selection levels in (N=708) Australian male 100-m Freestyle swimmers (12-17 years); (2) identify the relationship between maturation status and 100-m Freestyle performance; and (3) determine whether Maturation-based Corrective Adjustment Procedures (Mat-CAPs) could remove maturation-related differences in swimming performance.

Methods: In Part 1, maturity timing category distributions ('Early', 'Early Normative', 'Late Normative' and 'Late') for 'All', 'Top 50%' and '25%' of raw swimming times were examined within and across age-groups. In Part 2, multiple regression analyses quantified the relationship between maturity offset (YPHV) and swimming performance. Read More

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ERα Signaling in GHRH/Kiss1 Dual-Phenotype Neurons Plays Sex-Specific Roles in Growth and Puberty.

J Neurosci 2020 12 6;40(49):9455-9466. Epub 2020 Nov 6.

Department of Molecular and Integrative Physiology.

Gonadal steroids modulate growth hormone (GH) secretion and the pubertal growth spurt via undefined central pathways. GH-releasing hormone (GHRH) neurons express estrogen receptor α (ERα) and androgen receptor (AR), suggesting changing levels of gonadal steroids during puberty directly modulate the somatotropic axis. We generated mice with deletion of ERα in GHRH cells (GHRH), which displayed reduced body length in both sexes. Read More

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December 2020

Comparison of IVF and IVM outcomes in the same patient treated with a modified IVM protocol along with an oocytes-maturing system containing melatonin: A pilot study.

Life Sci 2021 Jan 2;264:118706. Epub 2020 Nov 2.

Reproductive Medicine Center, Department of Obstetrics and Gynecology, the First Affiliated Hospital of Anhui Medical University, No 218 Jixi Road, Hefei 230022, Anhui, China; NHC Key Laboratory of study on abnormal gametes and reproductive tract (Anhui Medical University), No 81 Meishan Road, Hefei 230032, Anhui, China; Key Laboratory of Population Health Across Life Cycle (Anhui Medical University), Ministry of Education of the People's Republic of China, No 81 Meishan Road, Hefei 230032, Anhui, China. Electronic address:

Aim: To compare embryonic developmental competence and clinical outcomes of oocytes matured in vivo (IVF oocytes) and those matured in vitro (IVM oocytes) from the same IVM/IVF cycles, and to analyze the clinical efficiency of a melatonin-supplemented in vitro maturation system combined with a modified IVM/IVF protocol.

Main Methods: We randomly recruited 22 patients undergoing IVM/IVF treatment protocol in our medical centre. The fertilization, cleavage and blastocyst formation rates, as well as clinical pregnancy, implantation and live birth/ongoing pregnancy rates were analysed and compared between IVF and IVM oocytes. Read More

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January 2021

Physician assistants in geriatric medical care.

BMC Geriatr 2020 11 4;20(1):449. Epub 2020 Nov 4.

Northern Arizona University, 15917 NE Union Rd, Ridgeview, WA, 98642, USA.

Background: The US population is maturing. As of 2020, over 52 million (16%) people are age 65 or older. With a citizenry that is increasingly "gray," the nation is short of medical providers who specialize in geriatric medical care. Read More

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November 2020

Characterization of sperm-associated antigen 6 expression in the reproductive tract of the domestic rooster (Gallus domesticus) and its impact on sperm mobility.

Poult Sci 2020 Nov 26;99(11):6188-6195. Epub 2020 Aug 26.

The Department of Poultry Science, University of Georgia, Athens, GA. Electronic address:

Sperm mobility is a major determinant of sperm quality in the domesticated chicken (Gallus domesticus) and is therefore an area of interest for improving fertility. Sperm-associated antigen 6 (SPAG6) is an important flagellar protein implicated to be necessary for flagellar function but negatively associated with rooster fertility. This study was aimed to characterize the expression of SPAG6 and investigate its utility as a protein biomarker of sperm mobility. Read More

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November 2020

Higher Executive Control Network Coherence Buffers Against Puberty-Related Increases in Internalizing Symptoms During the COVID-19 Pandemic.

Biol Psychiatry Cogn Neurosci Neuroimaging 2021 01 28;6(1):79-88. Epub 2020 Aug 28.

Department of Psychology, Stanford University, Stanford, California. Electronic address:

Background: Early pubertal maturation has been posited to be a biopsychosocial risk factor for the onset of internalizing psychopathology in adolescence; further, early-maturing youths exhibit heightened reactivity to stressful events. School closures and enforced social distancing, as well as health and financial uncertainties, during the COVID-19 pandemic are expected to adversely affect mental health in youths, particularly adolescents who are already at risk for experiencing emotional difficulties. The executive control network (ECN) supports cognitive processes required to successfully navigate novel challenges and regulate emotions in stressful contexts. Read More

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January 2021

Effect of Khat (Catha edulis Forsk) extract on testicular maturation in pre-pubertal and pubertal rats: A morphological and biochemical study.

Anat Histol Embryol 2021 Mar 22;50(2):271-283. Epub 2020 Oct 22.

Department of Anatomy, Embryology & Histology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt.

The present study aimed at analysing the effect of Khat plant extract on rat testicular development. Thirty-two weaned male albino rats (4 weeks old) were divided into four groups consisting of eight animals each. While control animals received normal saline, rats of groups I, II and III received 100, 200 and 300 mg Khat extract per kg body weight dissolved in distilled water by oral gavage daily for 8 weeks, respectively. Read More

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