scholarly journals Ecophysiological and behavioural responses to salinity and temperature stress in cyclopoid copepod Oithona davisae with comments on gender differences

Author(s):  
LEONID SVETLICHNY ◽  
ELENA HUBAREVA ◽  
MARCO UTTIERI

The gender differences in reaction to salinity (3-50) and temperature (6-26°C) stress were studied in the thermophilic cyclopoid copepod Oithona davisae, introduced in the brackish temperate Black Sea since 2001. Both females and males possessed similar salinity tolerance ranges (6–40) irrespective of the salinity change rate, and females displayed a striking osmotic control upon sharp (18-40 and 40-18) salinity shocks. By contrast, the temperature response of males and females were different. Torpidity was recorded at a temperature below 10°C in males collected both in warm and cold seasons, as well as in summer-autumn females whilst in females grown up at the beginning of winter the locomotor parameters were high even at 6°С. The total metabolic rate of summer-autumn and winter females was determined by the level of basal metabolic rate and energy expenditures due to motor activity. In winter females that maintained high activity at low temperature, the total and basal metabolic rates, differing by 2.3 times at all temperatures within the range of 8–28°C, varied in accordance with the temperature coefficient Q10 of about 2, whereas in summer-autumn females at low temperatures total metabolic rate decreased to the basal level. The plasticity of both males and female to wide ranges in abiotic conditions provide an adaptive strategy to sustain the spreading of O. davisae in diverse environments.

Nutrients ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 2653 ◽  
Author(s):  
Xinyan Bi ◽  
Ciarán G. Forde ◽  
Ai Ting Goh ◽  
Christiani Jeyakumar Henry

The underlying mechanisms that regulate energy homeostasis and food intake are not fully understood. Moreover, little research has been performed on the relation of body composition with habitual macronutrient intake among free-living populations. Since body composition and energy metabolism differ between males and females, we aimed to determine whether the relationship between body composition and habitual macronutrient intakes is gender-dependent. In this cross-sectional study, 261 participants (99 males) were recruited from Singapore. Macronutrient intake was evaluated from a three-day self-reported dietary record. Body composition and basal metabolic rate (BMR) were determined by using dual-energy X-ray absorptiometry (DEXA) and indirect calorimetry, respectively. Our results show that both BMR (p < 0.001) and lean body mass (LBM, p < 0.001) predicted daily energy intake (EI). LBM was positively associated with intakes of protein (PRO) and fat (FAT) in females, but not in males. This relationship persisted even after adjustment for fat mass (FM). On the other hand, no significant associations between FM and macronutrient intake were observed in both males and females. Therefore, the relationship between habitual macronutrient intake, LBM, and BMR is gender-dependent. Elucidating the gender differences in energy metabolism is important for understanding the factors that regulate energy homeostasis and can subsequently help better manage energy balance.


2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Kyle Landon Jossy

This study looked at how males and females were portrayed, based on the amount of skin shown in the clothing worn.  A Content analysis was performed on a sample of 20 randomly selected popular comics from the last 3 years.  Both male and female characters were rated on how much skin they showed in three clothing categories; neck line, sleeve length, and lower body.  Results showed that in all 3 categories, women consistently wore more revealing clothing.  The findings demonstraetd that the comic book industry is comparable to other forms of media, in the sexualization of female characters, by having them wear more revealing clothing.


2020 ◽  
pp. 003329412097175
Author(s):  
Johanna Levallius ◽  
Elin Monell ◽  
Andreas Birgegård ◽  
David Clinton ◽  
Emma Forsén Mantilla

Introduction Binge eating is a common behaviour that is strongly linked to both obesity and eating disorder. There is evidence that binge eating commonly co-occurs with other problematic and addictive-like behaviours; however, this has not been explored systematically. The present study aimed to examine the relationship between binge eating, body weight, disordered eating behaviours and associated addictive-like behaviours, with particular attention paid to gender differences. Method A community sample ( N = 500; 75% female, Mage = 32.5 years) reported disordered eating behaviours (i.e. binge eating, purging, restriction of eating, compulsive exercise), body mass index (BMI), food addiction, starvation addiction, exercise dependence, tobacco use and alcohol consumption. Results 42% of females and 21% of males reported binge eating during the past four weeks. Binge eating was significantly associated with all investigated behaviours in females, and with purging, compulsive exercise and overweight/obesity in males. Controlling for BMI, self-starvation predicted binge eating in males (OR = 1.07), while food addiction (OR = 1.73) and alcohol dependence (OR = 1.11) predicted binge eating in females. Conclusions The multiple associations between binge eating and addictive-like behaviors supports broad screening and generalized prevention efforts. Prevention efforts should reflect gender differences.


2002 ◽  
Vol 9 (3) ◽  
pp. 289-297 ◽  
Author(s):  
Aldert Vrij ◽  
Emma Kirby

Astudy is reported investigating gender differences in judging the behaviour of males and females during mixed-dyad conversations and the impact of the endorsement of rape myths in explaining these gender differences. A total of 51 males and 40 females watched a videotape of a male actor and female actor verbally interacting in a social environment and were asked to give their impression about this interaction. They were also requested to fill in the Rape Myths Acceptance Scale (1980). Results revealed that compared to females, males had a stronger tendency to see the interaction in sexual terms. Also, male participants endorsed rape myths more strongly. Finally, gender differences in rape myth endorsements accounted for gender differences in perceiving male-female mixed-dyad interactions to alimited extent. Implications of the findings are discussed.


2003 ◽  
Vol 30 (1) ◽  
pp. 29-43 ◽  
Author(s):  
Lorien Abroms ◽  
Cynthia M. Jorgensen ◽  
Brian G. Southwell ◽  
Alan C. Geller ◽  
Karen M. Emmons

This study employs focus group methodology to explore gender differences in sunscreen use. Guided by the theory of reasoned action, males and females were found to differ on each of the following constructs: behavior, behavioral beliefs, and normative beliefs. Males and females differed in their sunscreen use, with females adopting a more preventive style of sunscreen use and males a more reactive style. Males and females differed in their salient beliefs that motivated their sunscreen use, many of which were related to traditional American gender roles. In addition, although males and females were aware of both positive and negative sources of normative beliefs regarding sunscreen use, females received more encouragement from their mothers and peers than males. Findings are discussed in terms of their implications for the design of future interventions.


2018 ◽  
Vol 40 (4) ◽  
pp. 439-446 ◽  
Author(s):  
Michael J. Granado ◽  
Everett B. Lohman ◽  
Noha S. Daher ◽  
Keith E. Gordon

Background: Ultrasound is a widely used diagnostic tool for patients with plantar fasciitis. However, the lack of standardization during the measurement for plantar fascia thickness has made it challenging to understand the etiology of plantar fasciitis, as well as identify risk factors, such as gender. The purpose of this study was to investigate gender differences regarding plantar fascia thickness while controlling for metatarsophalangeal (MTP) joint position in the healthy and those with unilateral plantar fasciitis. Methods: Forty participants (20 with unilateral plantar fasciitis and 20 controls) with plantar fascia thickness (mean age, 44.8 ± 12.2 years) participated in this study. The majority were females (n = 26, 65%). Plantar fascia thickness was measured via ultrasound 3 times at 3 different MTP joint positions: (1) at rest, (2) at 30 degrees of extension, and (3) at maximal extension. Results: When comparing gender differences, the males in the plantar fasciitis group had a significantly thicker plantar fascia than the females ( P = .048, η2 = 2.35). However, no significant differences were observed between healthy males and females. The males with unilateral plantar fasciitis also had significantly thicker asymptomatic plantar fasciae collectively compared with controls ( P < .05), whereas females with unilateral plantar fasciitis had a similar but not significant change. Conclusion: It appears that healthy males and females have similar plantar fascia thickness. However, as plantar fasciitis develops, males tend to develop thicker plantar fasciae than their female counterparts, which could have future treatment implications. Level of Evidence: Level III, case-control comparative study.


PLoS ONE ◽  
2021 ◽  
Vol 16 (10) ◽  
pp. e0259069
Author(s):  
Phuc Pham-Duc ◽  
Kavitha Sriparamananthan

Inappropriate use of antibiotics has been one of the main contributors to antimicrobial resistance, particularly in Southeast Asia. Different genders are prone to different antibiotic use practices. The objective of this scoping review is to understand the extent and type of evidence available on gender differences in antibiotic use across Southeast Asia. The search strategy for this scoping review involved PubMed, Semantic Scholar, BioMed Central and ProQuest. Two-level screening was applied to identify the final sample of relevant sources. Thematic content analysis was then conducted on the selected final sources to identify recurring themes related to gender differences in antibiotic use and a narrative account was developed based on the themes. Recommendations for next steps regarding reducing inappropriate antibiotic use and gender considerations that need to be made when developing future interventions were also identified. Research on gender and antibiotic use remains scarce. Studies that discuss gender within the context of antibiotic use often mention differences between males and females in knowledge, attitudes and/or behaviour, however, do not explore reasons for these differences. Gender differences in antibiotic use were generally examined in terms of: (i) knowledge of antibiotic use and antimicrobial resistance and (ii) practices related to antibiotic use. Evidence indicated that differences between males and females in knowledge and practices of antibiotic use varied greatly based on setting. This indicates that gender differences in antibiotic use are greatly contextual and intersect with other sociodemographic factors, particularly education and socioeconomic status. Educational interventions that are targeted to meet the specific needs of males and females and delivered through pharmacists and healthcare professionals were the most common recommendations for reducing inappropriate use of antibiotics in the community. Such targeted interventions require further qualitative research on factors influencing differences in knowledge and practices related to antibiotic use among males and females. In addition, there is also a need to strengthen monitoring and regulation practices to ensure accessibility to affordable, quality antibiotics through trusted sources.


2020 ◽  
Vol 1 (1) ◽  
pp. 1-10
Author(s):  
Purbo Kusumastuti ◽  
Aulia Apriana ◽  
Yazid Basthomi

Touching into the gender differences between males and females in expressing the use of exaggeration expressions, this study analyzes the relevant data using the LIWC tool, the HIP method, and the deficit and difference theories. This study found that in relation to the gender stereotypes, both males and females speak differently, yet also demonstrate similarities. Both the male and female subjects express emotions equally in the language production; yet, the negative emotions are dominated by the males, and the positive emotions are dominated by the females. The difference of emotion productions influences the differences in the males’ production of exaggeration expressions, such as empty adjectives, italic expressions, and hyperbole by the female subjects.  


2022 ◽  
pp. 002242782110489
Author(s):  
Fawn T. Ngo ◽  
Egbert Zavala ◽  
Alex R. Piquero

Objectives We assess the proposed mechanisms outlined in Agnew’s General Theory of Crime and Delinquency about gender differences in crime and deviance (gender differences are due to differences between males and females in their standing on the life domains or differences in the effect of the life domains on the phenomenon among males and females) in accounting for sex differences in intimate partner violence (IPV) among a sample of young adults. Methods Drawing data from the International Dating Violence Study (IDVS) and employing the negative binomial regression method, we examined the effects of six self-domains, four family domains, one school/work domain, and one peer domain measures on IPV. Results Although males reported a higher frequency across all five life domains compared to females, the number of life domain variables that were significantly related to IPV among females was greater than the number among males. Further, the effects of the life domain variables on IPV were different for males and females with the peer variable (criminal peers) exhibiting the greatest effect on IPV among males and the self-domain (anger issues) demonstrating the greatest effect on IPV among females. Conclusions Agnew’s theory is well suited to assess sex differences in IPV.


Author(s):  
OJS Admin

Social support is the key contributor in high performance of athletes for both males and females. Social support has wide array of sources such as perceived and actual support. The study aims to investigate the gender differences in perceived level of social support.


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