Gender and age composition of populations of mermithidae (nematoda, mermithida) - abdominal parasites of invertebrates

10.12737/8442 ◽  
2015 ◽  
Vol 4 (4) ◽  
pp. 68-75
Author(s):  
Харченко ◽  
Nikolay Kharchenko
Keyword(s):  
Unit Area ◽  
Common Occurrence ◽  
Time Intervals ◽  
Age Composition ◽  
Open Environment ◽  
Gender And Age ◽  
Males And Females ◽  
Number Of Individuals ◽  
Dissocia Tion

It was found that the higher the number of individuals of parasites per unit area, the less evident dissocia-tion of males and females within subpopulations. With an overall paucity of Mermithidae dissociation of genders is a common occurrence. Dissociation of individuals by gender within subpopulations in separate time intervals allows the bias of different generations of parasites, as unfertilized females and non-coupling males accumulate in the open environment for several years. As a result, in subpopulations there is rather complicated composition of age’s groups from individuals of more than one generation.

scholarly journals Age and Gender as Cyber Attribution Features in Keystroke Dynamic-Based User Classification Processes

Electronics ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 835
Author(s):  
Ioannis Tsimperidis ◽  
Cagatay Yucel ◽  
Vasilios Katos
Keyword(s):  
High Accuracy ◽  
Keystroke Dynamics ◽  
Time Intervals ◽  
Age And Gender ◽  
Common Features ◽  
User Classification ◽  
Gender And Age ◽  
And Gender ◽  
Keystroke Dynamic

Keystroke dynamics are used to authenticate users, to reveal some of their inherent or acquired characteristics and to assess their mental and physical states. The most common features utilized are the time intervals that the keys remain pressed and the time intervals that are required to use two consecutive keys. This paper examines which of these features are the most important and how utilization of these features can lead to better classification results. To achieve this, an existing dataset consisting of 387 logfiles is used, five classifiers are exploited and users are classified by gender and age. The results, while demonstrating the application of these two characteristics jointly on classifiers with high accuracy, answer the question of which keystroke dynamics features are more appropriate for classification with common classifiers.

Gender and Schizophrenia: Association of Age at Onset with Antecedent, Clinical and Outcome Features

1998 ◽  
Vol 32 (3) ◽  
pp. 415-423 ◽  
Author(s):  
Oye Gureje ◽  
Rotimi W. Bamidele
Keyword(s):  
Functional Outcome ◽  
Early Onset ◽  
Late Onset ◽  
Age At Onset ◽  
Early Age ◽  
Illness Onset ◽  
Gender And Age ◽  
Males And Females ◽  
Clear Method ◽  
Illness Outcome

Objective: There is evidence that gender and age at onset may have a bearing on schizophrenia. The extent to which this differential age at onset influences the clinical features of schizophrenia and its outcome in males and females is not clear. Method: One hundred and twenty outpatients with DSM-III-R schizophrenia were studied to determine the association of antecedent, historical, clinical and 13–year outcome features with age at onset in females (n = 64) and in males (n = 56). Results: Males were significantly younger at illness onset but were not otherwise different from females in antecedent features of illness. For males, age at onset bore little relationship to outcome after 13 years. Females with early onset of illness were more likely to have experienced obstetric complications, to evidence poorer premor-bid functioning, and to have a worse clinical, social and functional outcome than females with late onset. Conclusions: Even though females may have a more benign illness than males, among females, those with early age at onset may be characterised by neurodevel-opmental deviance and worse illness outcome.

scholarly journals Red fox sex ratio and changes in the number in the Krasnoarmeisky District of the Samara Region

2018 ◽  
Vol 7 (2) ◽  
pp. 111-115
Author(s):  
Olga Aleksandrovna Sklueva ◽  
Valeriy Vitalyevich Sklyuev ◽  
Rafik Ibragimovich Khakimov
Keyword(s):  
Population Dynamics ◽  
Sex Ratio ◽  
Vulpes Vulpes ◽  
Red Fox ◽  
Direct Impact ◽  
Age Composition ◽  
Behavioral Adaptations ◽  
Epizootic Process ◽  
Males And Females ◽  
Homeostatic State

The paper presents some data on the red fox ( Vulpes vulpes , Linnaeus, 1758) sex ratio in the Krasnoarmeysky District of the Samara Region. The results of winter trails traces of mammals show the placement of individual sites of males and females. The authors consider relationship between the population dynamics, sex and age composition and the placement of individual sites. Some aspects of behavioral adaptations and causes of changes in the number of animals in the study area are considered. The influence of a poaching factor on the dynamic indicators of the studied population and the possible danger of the epizootic process is described. A comparative analysis with the previously obtained data on the ratio of males and females in the litter is carried out. The paper indicates possible causes of animals number changes in the study areas. Poaching has a direct impact on the studied population homeostatic state maintaining mechanisms. There is also a forecast of poaching influence on deterioration of epidemiological and epizootic situation in the investigated region. In this paper we give recommendations to minimize possible damage by human activities.

scholarly journals The Effect of Gender and Age on Intimate Partner Emotional Abuse

2017 ◽  
Vol 4 (3) ◽  
Author(s):  
Seema Vinayak ◽  
Najmeh Safariolyaei
Keyword(s):  
Emotional Abuse ◽  
Partner Abuse ◽  
Intimate Partner Abuse ◽  
Intimate Partner ◽  
Age Effects ◽  
Inclusion Criteria ◽  
Gender And Age ◽  
Main Effect ◽  
Males And Females ◽  
Effect Of Age

Objectives: The purpose of the current research was to study the intimate partner emotional abuse as a form of IPV victimization in India and also was to examine how gender and age effects the alleged intimate partner emotional abuse. Methodology: Initially a sample of 500 hundred heterosexual males and females were contacted. Sample of total 300 hundred was selected based on the inclusion criteria. The sample was further categorized into 150 hundred males and 150 hundred females. Each of these groups was further divided with 75 in each subgroups of age I (30-35 years), and age II (35-40 years). Emotional Abuse Questionnaire (EAQ; Gottman & Gottman, 2009) was used. Results: 2 x 2 ANOVA revealed significant main effect of gender (F (1, 592) = 22.10, p < 0.01), and non-significant main effect of age. Mean scores on gender revealed that females (M = 251.23) were higher than males (M =241.86) on perceived intimate partner emotional abuse. Conclusion: The results of present study revealed that females were higher than males on perceived intimate partner emotional abuse but there are increasing numbers of men who are reporting to be victims of perceived intimate partner abuse.

Reproductive biology of the false coral snake Oxyrhopus guibei (Colubridae) from southeastern Brazil

2002 ◽  
Vol 23 (4) ◽  
pp. 495-504 ◽  
Author(s):  
Otavio Marques ◽  
Lígia Pizzatto
Keyword(s):  
Body Size ◽  
Reproductive Biology ◽  
Rainy Season ◽  
Reproductive Activity ◽  
Climatic Conditions ◽  
Southeastern Brazil ◽  
Coral Snake ◽  
Males And Females ◽  
Reproductive Cycles ◽  
Number Of Individuals

AbstractThe reproductive biology of the false coral snake, Oxyrhopus guibei, was studied through dissection of 496 specimens, combined with observations on captive individuals. Males mature with smaller body size than females, females attain much larger body size, and male-male combat is not expected. Clutch size ranged from 3 to 20, and was correlated with female length. Reproductive cycles in both males and females seem to be continuous, with vitellogenesis and spermatogenesis occurring throughout the year. Reproductive activity in both sexes decreased at the end of the rainy season possibly due to previous intense reproductive activity in more favorable climatic conditions. The smaller number of individuals collected at the end of the rainy season apparently occurs due to the decrease of reproductive activity of this snake.

Relationship Between Gender, Stress, and Quality of Social Support

2020 ◽  
pp. 003329412093984 ◽  
Author(s):  
Meredith Kneavel
Keyword(s):  
Social Support ◽  
Perceived Stress ◽  
Internet Survey ◽  
Support Network ◽  
Tend And Befriend ◽  
Gender And Age ◽  
Males And Females ◽  
And Gender ◽  
And Coping

Background Research suggests that gender differences exist in both stress and how social support is utilized and that the relationship between stress and social support may not be linear. Methods An internet survey of n = 1080 participants was conducted evaluating quality and quantity of social support, gender, age, and perceived stress and coping. Results Reported quality of social support, gender, and age significantly predicted perceived stress and that there was a curvilinear interaction between the quality of social support and gender which significantly predicted perceived stress. Conclusion The current findings supported Taylor’s Tend and Befriend theory that females have higher reported stress levels, a larger support network, and report more quality in their social support. Practitioner points:  • Males and females may manifest stress differently in their relationships. • When working with males and females in practice it may be important to understand the depth and breadth of their social networks and how they utilize those networks. • Females indicate higher levels of stress and greater social support quality. • It is important to understand that one’s social network can be an important source of support (a coping mechanism) but that it can also serve as a stressor in some cases.

Relationships Among Violent and Non-Violent Video Games, Anxiety, Self-Esteem, and Aggression in Female and Male Gamers

2019 ◽  
Vol 11 (3) ◽  
pp. 15-37
Author(s):  
Cristina Cabras ◽  
Maria Laura Cubadda ◽  
Cristina Sechi
Keyword(s):  
Video Games ◽  
Video Game ◽  
State Anxiety ◽  
Positive Relationship ◽  
Self Esteem ◽  
Violent Video Game ◽  
Gender And Age ◽  
Aggression Questionnaire ◽  
Males And Females ◽  
Video Gamers

This study examines the differences in anxiety, self-esteem, and aggression levels between players of violent and non-violent video game and its connection to gender and age. This survey-based research utilizes survey data from 851 video gamers. The study included 61% men and 39% women. The ages of the participants ranged from 18 to 45. Participants were administered an anonymous survey including demographics, a questionnaire for video game habits, Rosenberg's self-esteem scale, a state anxiety inventory (STAI-S), and the Buss-Perry Aggression Questionnaire (BPAQ). The results revealed significant differences between males and females, as well as between younger and older gamers. Despite the majority of research showing a positive relationship between violent video game exposure and aggression levels, the results suggest that of the preference for a violent video game over a non-violent one is not, in itself, a cause for increased anxiety, self-esteem, and aggression levels.

scholarly journals Genetic influence on electrocardiogram time intervals and heart rate in aging mice

2009 ◽  
Vol 296 (6) ◽  
pp. H1907-H1913 ◽  
Author(s):  
Shuqin Xing ◽  
Shirng-Wreng Tsaih ◽  
Rong Yuan ◽  
Karen L. Svenson ◽  
Linda M. Jorgenson ◽  
...  
Keyword(s):  
Heart Rate ◽  
Inbred Strains ◽  
Genetic Influence ◽  
Cardiac Conduction ◽  
Qrs Complex ◽  
Time Intervals ◽  
Age Related ◽  
Males And Females ◽  
Heritability Estimates ◽  
Age Related Changes

Understanding the genetic influence on ECG time intervals and heart rate (HR) is important for identifying the genes underlying susceptibility to cardiac arrhythmias. The objective of this study was to determine the genetic influence on ECG parameters and their age-related changes in mice. ECGs were recorded in lead I on 8 males and 8 females from each of 28 inbred strains at the ages of 6, 12, and 18 mo. Significant interstrain differences in the P-R interval, QRS complex duration, and HR were found. Age-related changes in the P-R interval, QRS complex duration, and HR differed among strains. The P-R interval increased with age in 129S1/SvlmJ females. The QRS complex duration decreased with age in C57BR/J males and DBA2/J females but increased in NON/ShiLtJ females. HR decreased in C57L/J females and SM/J and P/J males but increased in BALB/cByJ males. Differences between males and females were found for HR in SJL/J mice and in the P-R interval in 129S1/SvlmJ mice. Broad-sense heritability estimates of ECG time intervals and HR ranged from 0.31 for the QRS complex duration to 0.52 for the P-R interval. Heritability estimates decreased with age for the P-R interval. Our study revealed that genetic factors play a significant role on cardiac conduction activity and age-related changes in ECG time intervals and HR.

First admissions to inpatient care in Ireland for schizophrenia 1971-2004: trends in gender and age

2007 ◽  
Vol 24 (4) ◽  
pp. 132-139 ◽  
Author(s):  
Caroline Hart ◽  
Donna T Doherty ◽  
Dermot Walsh
Keyword(s):  
Marital Status ◽  
Psychiatric Inpatient ◽  
Future Research ◽  
Hospital Data ◽  
Community Based ◽  
Never Married ◽  
Time Period ◽  
Gender And Age ◽  
Males And Females ◽  
First Admission

AbstractFirst admissions for schizophrenia to inpatient psychiatric services in Ireland are declining. The reason for this decline has been debated and it has been proposed that it could be attributable to either a decline in incidence or to policy changes or to both.Objectives: This study examines the trends in first admission numbers for schizophrenia in Ireland and the influence of gender and marital status on age at first admission over the time period 1971-2004.Method: Data were derived from the National Psychiatric Inpatient Recording System (NPIRS) for the years 1971-2004 inclusive. All first admissions with a diagnosis of schizophrenia during these years were included in the analysis.Results: The results showed a significant decline in the number of first admissions with the number of first admissions for males exceeding those for females. The average age of first admission was higher for females than males (p < 0.001). The average age of first admission showed a decline for males (p < 0.001), but not for females. Marital status was a stronger predictor of age of admission than gender (p < 0.001). Never married persons had a lower age of first admission than those married and the delaying effect of marriage on age at first admission was evident in males and females (p < 0.001).Conclusions: An examination of first admission hospital data confirm male disadvantage in schizophrenia. The study highlighted a number of areas for future research which include examining gender differences in more refined diagnostic sub groups of schizophrenia and the monitoring of first contacts with community-based mental health services.

scholarly journals The Development of the Species of Upogebia from Plymouth Sound

1919 ◽  
Vol 12 (1) ◽  
pp. 81-134 ◽  
Author(s):  
Gladys E. Webb
Keyword(s):  
Adult Stage ◽  
Distinct Species ◽  
The Body ◽  
Specific Character ◽  
Common Occurrence ◽  
Living State ◽  
Males And Females ◽  
Small Point

Upogebia deltura Leach and Upogebia stellata (Mont.) are both of common occurrence on the coasts of Devonshire and Cornwall, but in the adult stage they are not easily obtained, owing to their burrowing habits. The larvæ, however, are very common in the tow-nets, occurring throughout the year with the exception of the midwinter months, and are particularly plentiful from June to August. The two species are closely allied, and for some time it was believed that the differences between them might be merely sexual, and not specific (Bell 1853). They are now clearly recognised as separate and distinct species, and De Morgan (1910) has obtained males and females of both forms. Upogebia deltura Leach may be distinguished by its greater size, sometimes five or six inches in length when full-grown, as well as by its broad abdomen with soft abdominal pleura. The two joints of the chela on the first thoracic leg are almost equal in length. Upogebia stellata (Mont.) is an altogether smaller and more slender animal, seldom exceeding two and a half inches in length. The abdomen is narrower, and the fixed finger of the chela very much shorter than the dactylus. There is also a small point on the side of the carapace, just over the base of the second antenna, which has been established as a specific character by De Morgan (1910). In the living state the body of the animal is covered with orange-red spots (hence its name stellata), while Upogebia deltura Leach is of a uniform dirty cream colour.

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