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Born to sing!Song development in a singing primate

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Current Zoology 2021年第6期67卷 597-608页

作者： Chiara DE GREGORIO Filippo CARUGATI Vittoria ESTIENNE Daria VALENTE Teresa RAIMONDI Valeria TORTI Longondraza MIARETSOA Jonah RATSIMBAZAFY Marco GAMBA Cristina GIACOMA Department of Life Sciences and Systems Biology University of Torinovia Accademia Albertina 13Torino 10125Italy Groupe d’Etude et de Recherche sur les Primates de Madagascar(GERP) BP 779–Antananarivo 101Madagascar

In animal vocal communication,the development of adult-like vocalization is fundamental to interact appropriately with ***,the factors that guide ontogenetic changes in the acoustic features remain poorly *** contrast with a historical view of nonhuman primate vocal production as substantially innate,recent research suggests that inheritance and physiological modification can only explain some of the developmental changes in call structure during growth.A particular case of acoustic communication is the indris’singing behavior,a peculiar case among Strepsirrhine *** to a decade of intense data collection,this work provides the first long-term quantitative analysis on song development in a singing *** understand the ontogeny of such a complex vocal output,we investigated juvenile and sub-adult indris’vocal behavior,and we found that young individuals started participating in the chorus years earlier than previously *** results indicated that spectro-temporal song parameters underwent essential changes during *** particular,the age and sex of the emitter influenced the indris’vocal *** found that frequency parameters showed consistent changes across the sexes,but the temporal features showed different developmental trajectories for males and *** the low level of morphological sexual dimorphism and the marked differences in vocal behavior,we hypothesize that factors like social influences and auditory feedback may affect songs’features,resulting in high vocal flexibility in juvenile *** trait may be pivotal in a species that engages in choruses with rapid vocal turn-taking.

关键词： duet flexibility juveniles lemurs ontogeny rhythm

Reproductive performance of the Mesa silverside(Chirostoma jordani Woolman,1894)under natural and controlled photoperiods

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BIOCELL 2012年第3期36卷 105-111页

作者： JOSÉLUIS ARREDONDO-FIGUEROA LAURA GEORGINA NÚÑEZ-GARCÍA PALOMA ADRIANA HEREDIA-GUZMÁN JESÚS T.PONCE-PALAFOX Posta Zootécnica Departamento de ZootecniaCentro de Ciencias AgropecuariasUniversidad Autónoma de AguascalientesJesús MaríaAguascalientesMéxico Planta Experimental de Producción Acuícola Departamento de HidrobiologíaCBSUniversidad Autónoma Metropolitana IztapalapaMéxicoD.F Facultad de Estudios Superiores Iztacala Universidad Nacional Autónoma de MéxicoEstado de MéxicoMéxico Centro de Innovación y Transferencia Tecnológica CENITT Posgrado CBAPEscuela Nacional de Ingeniería PesqueraUniversidad Autónoma de NayaritTepicNayaritMéxico

Chirostoma jordani is a native annual species inhabiting lacustrine waters of the Central Mexico *** is widely distributed and is currently facing high environmental *** experi-ments were performed to study the reproductive performance of this *** of the experiments were conducted in 270-L indoor recirculation *** males and one female at the first stage of reproduction were included in each test.A photoperiod of 14 light hours and 10 dark hours was *** a fifth experiment,10 females and 15 males were kept in an outdoor 3,000-L recirculation tank under natural *** number of spawns,fertilised eggs and 30-day-old juveniles were counted and the survival rate was *** results indicated significant differences(Pjuveniles and a higher survival rate were observed under natural *** trials exhibited different patterns of egg produc-tion during the *** egg production in the natural-photoperiod trials followed a polynomial curve *** contrast,the trials under the controlled photoperiod showed an irregular pattern of increases and decreases in egg production.

关键词： breeding Atherinopsidae eggs juveniles survival rate

The Epidemiology of Self-Harm in the Romanian Juvenile Prison System: A Two-Year Cohort Study

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Open Journal of Epidemiology 2021年第4期11卷 371-389页

作者： Carmen-Valeria Baias Joseph Beckwith-Finnegan Faculty of Integral Medicine University EurAka Therwil Switzerland The University of Georgia Athens USA

Background: There is no extensive literature on social predictors of self-harm in the juvenile justice system, over the time of a prisoner’s sentence. Self-harm behavior displays a higher prevalence in prison, 11 to 14 times greater than in the general population. Our study extended the current research in self-harm by examining dynamic factors of self-harm in adolescents over their sentence in the Romanian juvenile prison system. Method: The present research examined longitudinal predictors of self-harm behaviors in 439 adolescent inmates (Mage = 16.21;5.2% female, 94.8% male), enrolled in prison during 2011-2012, following them for two years. A series of time-to-event analyses were applied to start from the time of the subject’s internment in the juvenile prison system. Results: Findings from the multivariate survival analyses show that adherence to self-harm conduct in prison was consistently influenced by family factors and prison contexts;although low ability to cope with frustration, sensitivity and emotion dysregulation also mattered. Keeping the other covariates invariant, serving a prison sentence in a closed regime reduces the probability of remaining free of self-harm events, increasing the monthly hazard of self-harm by a factor of 5.26 on average (HR = 5.26, 95% CI = 2.37 - 11.64) compared to the open regime. Conclusion: A greater focus on longitudinal studies may help improve the screening process and also follow the progress of each juvenile to warrant the efficacy of preventive programs in self-harm, according to their emerging needs.

关键词： Self-Harm Risk-Assessment Survival Analysis juveniles Prison System

The Epidemiology of Recurrent Violence and Its Relationship with Sentence Time in the Romanian Juvenile Prison System: A Two-Year Cohort Study

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Open Journal of Epidemiology 2022年第1期12卷 12-30页

作者： Carmen-Valeria Baias Faculty of Integral Medicine University EurAka Therwil Switzerland

Background: Research suggests that a small number of persistent violent offenders are responsible for a majority of prison violence and tend to behave violently to a disproportionate amount. However, literature on patterns of violence in juvenile prisoners is limited. Method: In order to explore how subjects engage in violence while incarcerated in the juvenile prison system, the authors will examine both proximal and distal predictors of violent behavior among juveniles in custody. This study adds to the current empirical research by longitudinally examining dynamic risk factors of recurrent violent behavior across a population of juvenile prisoners (Mage = 16.21;94.8% male) in custody in the Romanian juvenile justice system, starting from their entry date until the end of the follow-up period (Me = 2 years). Results: Results from a series of repeated aggressive events survival analyses show evidence of a long-term deleterious association between pre-incarceration risk factors and poor developmental trajectory associated with violence. Adherence to destructive conduct in prison was consistently influenced by low ability to cope with the prison environment, although education level and family factors also mattered. Implications for prison professionals and forensic practitioners are presented. Conclusion: Recurring aggressive behavior is frequent for individuals who experience complex adverse experiences during childhood, suggesting that screening youths upon their admission into juvenile justice settings should include an assessment of their basic self-regulation needs. A greater focus on longitudinal studies may help improve the screening process and also follow the progress of each juvenile to warrant the efficacy of preventive programs in self-harm, according to their emerging needs.

关键词： Violence Risk-Assessment Repeated Events Analysis juveniles Prison System

Study on Pond Cultivation Technology of Juvenile Poyang Lake Catfish

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Agricultural Science & Technology 2016年第9期17卷 2111-2113,2123页

作者：姚毅许亮清熊春贤姜青龙侯玉洁南昌市农业科学院江西南昌330006

In this paper, the feeding strategies and related pond cultivation technology of catfish juveniles were reviewed, thereby providing technical support for largescale rearing of large-size catfish juveniles. The growth rate of Poyang Lake catfish juveniles was higher than those of juvenile black carp, grass carp, silver carp and bighead carp. Compared with southern catfish juveniles, the large-size Poyang Lake catfish juveniles had characteristics of relatively docile temperament, coarse feed resistance and lower incidence.

关键词： Catfish juveniles Feeding Pond