L’haplodiploïdie chez les hyménoptères leur confère une meilleure résistance aux effets délétères de la dépression de consanguinité. Cependant, certains hyménoptères ont un déterminisme du sexe particulier qui les rend sensibles à cette dépression. Chez ces espèces, le genre des individus dépend de la complémentarité des allèles à un locus donné, le single-locus Complementary Sex Determination (sl-CSD). Les oeufs non fécondés se développent en mâles haploïdes alors hémizygotes au locus de CSD. En revanche les oeufs fécondés donnent des femelles diploïdes s’ils sont hétérozygotes au locus du CSD mais deviennent des mâles diploïdes s’ils sont homozygotes pour ce même locus. Ces derniers sont d’autant plus fréquents dans les populations consanguines où le taux d’homozygotes est élevé. Or, les mâles diploïdes sont dans la majorité des cas non viables ou stériles. La production de tels mâles est de ce fait coûteuse pour les femelles. La faible viabilité des mâles diploïdes s’apparente alors à de la dépression de consanguinité. Par des approches liées à l’écologie comportementale et à l’écologie chimique le projet de thèse se concentre sur l’étude des coûts individuels générés par la production de mâles diploïdes et à l’évolution des comportements sélectionnés en réponse à ces coûts. Dans un premier temps, je me suis intéressée à la fitness des mâles diploïdes et aux répercussions de leur production sur les femelles de la population. Dans un second temps, j’ai étudié les comportements permettant de réduire les coûts de la production des mâles diploïdes. Les individus apparentés représentent les partenaires sexuels où le risque de produire des fils diploïdes est le plus élevé. De ce fait, les comportements d’évitement de la consanguinité devraient être sélectionnés dans ces populations / Haplodiploidy in hymenopterans offers a great resistance to the deleterious effect of inbreeding depression. However, some hymenopterans have a specific sex determination which drives them to this depression. Among those species, the sex of individuals depends on allele complementary at a particular locus; the single-locus Complementary Sex Determinatation (sl-CSD). Unfertilized eggs give birth to haploid males which are hemizygotes at the CSD locus. Conversely, fertilized eggs develop into females when heterozygote at the CSD locus but become diploid males when homozygote at the same locus. Diploid males are especially frequent in inbred populations with a high inbreeding rate. Yet diploid males are generally unviable or sterile. Production of such males is therefore costly for females. Reduced viability of diploid males is then similar to inbreeding depression. Linked with behavioural ecology and chemical ecology approaches, the PhD project starts by focusing on individual costs due to production of diploid males, and then on behaviours that have evolved in response to these costs. As a first step, the fitness of diploid males and its impact on females of the population have been measured. If they are unviable, their production is akin to female mortality. As a second step, we studied behaviours that reduce the cost of diploid male production. Related individuals are sexual partners that are most likely to father diploid sons. Therefore, behavioural inbreeding avoidance may be selected in such populations

The current work extends upon the theories of female mate preference in a novel way by examining how the interaction of race and the masculinity of males affect preference in females. In Study 1, I manipulated the facial masculinity of photographs of White, Black, and Asian males. Female participants rated the faces on attractiveness, masculinity, and age. In Study 2, nine photographs were matched on masculinity and participants made judgments on dimensions relating to dateabiltity, attractiveness, resources, masculinity, and parenting behaviors. Asian males are often neglected as potential romantic partners. A major aim of the current work was to assess if racial bias against Asian males in romantic situations are lessened with increased facial masculinity. Asian males were evaluated highly across several dimensions if they possessed high masculine facial characteristics. Medium masculine White and Black males were evaluated as the most attractive and dateable in their respective racial groups. Additionally, low masculine White and Black males were evaluated as better choices for resource and family-related attributions in their respective racial groups.

According to current U.S. labor statistics, Black male executives are underrepresented in every major industry in the United States. Common impediments preventing Black males from occupying executive positions include workplace white supremacy, biculturalism, repressive structures, and disparate career development. Using critical race theory as a framework, this basic qualitative study investigated the experiences of eight male executives, five Black and three white, from various industries to understand their perceptions and perspectives on race and racism, and examined their workplace lived experiences to study why there are not more Black males in the e-suite. Moreover, strategies to increase Black male representation in executive leadership positions were explored. The results of this study indicated white supremacy and norms are ubiquitous and dominant in the workplace. Consequently, this prevailing workplace ideology determines an organization’s culture, policies and practices, and, altogether, trigger traumas for Black males. Black male participants associated many of their workplace experiences with traumas in the forms of white favoritism, marginalization, stereotyping, microinvalidation, and compulsive assimilation. As a coping mechanism, they found support and organizational belonging through social networking in peer relationships and affinity groups, but their white counterparts almost exclusively used networking for career advancement.5 An emergent strategy from this study to increase Black male representation in the e-suite was the notion of a designed relationship model between aspiring Black male executives and equity-minded white male executives. However, because scholarship concerning career barriers impeding Black males from executive leadership positions is limited, future research is required to better understand the relationship between their workplace traumas and their underrepresentation.

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California Community Colleges (CCC) are the largest post-secondary higher education systems in the nation, with an enrollment of over 2 million at a given year. They are also the most affordable and accessible for students after completing K-12 education. With California having the largest Latinx residents (39%), they overwhelmingly makeup 45% of the student population enrolled in CCC. Although Latinx students are pursuing higher education and enrolling in high numbers in CCC’s, they still fall short when it comes to student success outcomes, particularly transfer, when compared with their peers. Only 10 % of Latinx students transfer in two years, 16% in four years, and 32 % in six years. This number becomes more alarming when only analyzing the Latino male student transfer rate, which is less than four percent in two years, seven percent in four years and 16 % in six years. Aspects of literature attributes the Latinx attainment gap to both institutional and environmental determinants. Institutional determinants include: academic preparedness, the role of faculty, staff, and administration, and faculty diversity. Environmental determinants include: family influences, financial and socioeconomic status, as well as masculinity identity. Given what the literature has provided, this study will look at Latino male students who have indicated progress towards transfer using the Associates Degree for Transfer (ADT). The ADT was established in 2011 and it was meant to create a clearer path for students to navigate the transfer process and end up transferring to a California State University (CSU). This study employed Merriam’s (206) basic qualitative research methodology to understand the meaning that students have constructed through their college experience and interactions with peers, counselors, faculty, and administrators. A total of 10 participants, all Latino community college males, were part of this investigation. The data collection process included: semi-structured interviews, which were one hour in length, using thematic analysis as well as a color-coded method. The research data was viewed through Yosso’s (2005) Community Cultural Wealth framework to capture the positive qualities that Latino male students bring to higher education. The results from this study indicated that Latino male students had a wide range of challenges steaming from environmental to academic challenges. Additionally, findings suggest that many Latino male students are disengaged from campus support services. This may be due to the COVID – 19 pandemic and the services being offered virtually. A third component from the findings suggest that Latino male students need a sense of belonging to the campus. This can be done by establishing a Latino center, male initiative program, greater mentorship, or and designated counselors that can invest as well as dedicate more time in their education. The researcher outlined several recommendations for action in the field of community college practice and for further research.

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The purpose of this qualitative study was to understand the social, cultural, and structural factors that contribute to or inhibit alcohol use and abuse in the Army among young males, unmarried or married without a present spouse. Seventeeen single, or separated, young male soldiers stationed at Fort Bragg Army Base were interviewed to provide insight into the research questions. Soldiers were largely located through face-to-face canvassing. The interviews, which lasted from 45 to 90 minutes, took place face-to-face and were then transcribed. Interviews were analyzed using grounded theory approach by locating patterns, themes and relationships to come to generalizations. The themes that emerged from the interviews include: 1) stresses of army work/life; 2) social/entertainment use; 3) tradition/brotherhood/entitlement; 4) fear/consequences; 5) impressionable youth; 6) treatment. While the themes which emerged were reported in discrete terms, there was overlap in them. The functional aspect of alcohol use to these soldiers mixed with the impact of social interaction influencing their use served to encourage and further the use of alcohol. The drinking patterns of young male soldiers can be seen to exist on a continuum of either social integration or social stress, in line with Durkheim's conception of suicide, with the existence of being on either end of these continuums leading to excessive alcohol use. The findings confirm Durkheim's conception of social order in leading to unhealthy responses and indicate the Army needs to address the role and impact of the greater social environment in leading to alcohol misuse among young male soldiers.

The presence of siblings during childhood and adolescence has a significant impact on the behaviors and perceptions of adults later in life. Effects of mixed-gendered sibling dyads on delinquent behavior, gender typing, and romantic and sexual relationships are of interest. These behaviors can lead to notable health disparities, making it imperative to gain insight into factors associated with such behaviors in young adult and adolescent males. This project explored possible correlations between gender composition of siblings and health behavior indicators for violence, competition and risk, and sexual and romantic relationships. Analysis of these variables was performed using data from the Young Adult and Adolescent Male Health Behavior Indicator Scale [YAAMHBIS]. Descriptive analyses showed YAAM understanding of abuse and successful marriage and relationship qualities, as well as a conditional acceptance of violence, competition, and risk. Means testing between those with and without sisters indicated that those with sisters acknowledged abuse, marriage qualities, and the consequences of infidelity. Additionally, those with sisters had, on average, an earlier age of sexual debut than those without supporting previous research regarding the effects of female communication in childhood on adult interactions. The correlations found between sibling gender and YAAM perceptions later in life could lay the groundwork for future studies further investigating sibling gender or split households and an association with health behaviors.

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