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1.
J Health Care Poor Underserved ; 35(2): 692-706, 2024.
Article in English | MEDLINE | ID: mdl-38828589

ABSTRACT

This study examined the e-cigarette and vaping resistance strategies used by Native Hawaiian and Pacific Islander (NHPI) youths in rural Hawai'i. Focus groups (N = 17) were conducted in eight geographically dispersed elementary, middle/intermediate, and multilevel schools in low-income communities on Hawai'i Island. Sixty-nine youths (67% NHPI, Mage = 12.5 years) participated in this study. The resistance strategies discussed across the greatest number of groups were "refuse" (saying no), "explain" (providing reasons for vaping refusal), "avoid" (avoiding people or places where e-cigarettes were used), and "leave" (walking away from a situation where e-cigarettes were being used). Participants described the challenges in using these strategies within contexts characterized by widespread peer and family vaping and strong social demands to use e-cigarettes. The findings suggest the need for multi-level interventions based on youths' resistance strategies to meaningfully reduce youth vaping use in rural and/or NHPI communities.


Subject(s)
Focus Groups , Native Hawaiian or Other Pacific Islander , Vaping , Humans , Adolescent , Native Hawaiian or Other Pacific Islander/statistics & numerical data , Native Hawaiian or Other Pacific Islander/psychology , Vaping/ethnology , Hawaii , Male , Female , Child , Electronic Nicotine Delivery Systems/statistics & numerical data , Rural Population/statistics & numerical data , Pacific Island People
2.
JAMA Netw Open ; 7(5): e243696, 2024 May 01.
Article in English | MEDLINE | ID: mdl-38691362

ABSTRACT

Importance: The people of Hawai'i have both high rates of health insurance and high levels of racial and ethnic diversity, but the degree to which insurance status and race and ethnicity contribute to health outcomes in COVID-19 remains unknown. Objective: To evaluate the associations of insurance coverage, race and ethnicity (using disaggregated race and ethnicity data), and vaccination with outcomes for COVID-19 hospitalization. Design, Setting, and Participants: This retrospective cohort study included hospitalized patients at a tertiary care medical center between March 2020 and March 2022. All patients hospitalized for acute COVID-19, identified based on diagnosis code or positive results on polymerase chain reaction-based assay for SARS-CoV-2, were included in analysis. Data were analyzed from May 2022 to May 2023. Exposure: COVID-19 requiring hospitalization. Main Outcome and Measures: Electronic medical record data were collected for all patients. Associations among race and ethnicity, insurance coverage, receipt of at least 1 COVID-19 vaccine, intensive care unit (ICU) transfer, in-hospital mortality, and COVID-19 variant wave (pre-Delta vs Delta and Omicron) were assessed using adjusted multivariable logistic regression. Results: A total of 1176 patients (median [IQR] age of 58 [41-71] years; 630 [54%] male) were hospitalized with COVID-19, with a median (IQR) body mass index (BMI; calculated as weight in kilograms divided by height in meters squared) of 30 (25-36) and Sequential Organ Failure Assessment score of 1 (0-2). The sample included 16 American Indian or Alaska Native patients, 439 Asian (not otherwise specified) patients, 15 Black patients, 66 Chinese patients, 246 Filipino patients, 76 Hispanic patients, 107 Japanese patients, 10 Korean patients, 299 Native Hawaiian patients, 523 Pacific Islander (not otherwise specified) patients, 156 Samoan patients, 5 Vietnamese patients, and 311 White patients (patients were able to identify as >1 race or ethnicity). When adjusting for age, BMI, sex, medical comorbidities, and socioeconomic neighborhood status, there were no differences in either ICU transfer (eg, Medicare vs commercial insurance: odds ratio [OR], 0.84; 95% CI, 0.43-1.64) or in-hospital mortality (eg, Medicare vs commercial insurance: OR, 0.85; 95% CI, 0.36-2.03) as a function of insurance type. Disaggregation of race and ethnicity revealed that Filipino patients were more likely to die in the hospital (OR, 1.79; 95% CI, 1.04-3.03; P = .03). When considering variant waves, mortality among Filipino patients was highest during the pre-Delta time period (OR, 2.72; 95% CI, 1.02-7.14; P = .04), when mortality among Japanese patients was lowest (OR, 0.19; 95% CI, 0.03-0.78; P = .04); mortality among Native Hawaiian patients was lowest during the Delta and Omicron period (OR, 0.35; 95% CI, 0.13-0.79; P = .02). Patients with Medicare, compared with those with commercial insurance, were more likely to have received at least 1 COVID-19 vaccine (OR, 1.85; 95% CI, 1.07-3.21; P = .03), but all patients, regardless of insurance type, who received at least 1 COVID-19 vaccine had reduced ICU admission (OR, 0.40; 95% CI, 0.21-0.70; P = .002) and in-hospital mortality (OR, 0.42; 95% CI, 0.21-0.79; P = .01). Conclusions and Relevance: In this cohort study of hospitalized patients with COVID-19, those with government-funded insurance coverage (Medicare or Medicaid) had similar outcomes compared with patients with commercial insurance, regardless of race or ethnicity. Disaggregation of race and ethnicity analysis revealed substantial outcome disparities and suggests opportunities for further study of the drivers underlying such disparities. Additionally, these findings illustrate that vaccination remains a critical tool to protect patients from COVID-19 mortality.


Subject(s)
COVID-19 Vaccines , COVID-19 , Hospitalization , Insurance Coverage , SARS-CoV-2 , Humans , COVID-19/ethnology , Male , Female , Middle Aged , Hawaii/epidemiology , Retrospective Studies , Hospitalization/statistics & numerical data , Insurance Coverage/statistics & numerical data , Aged , Adult , Vaccination/statistics & numerical data , Ethnicity/statistics & numerical data , Racial Groups/statistics & numerical data , Hospital Mortality
3.
Water Environ Res ; 96(5): e11037, 2024.
Article in English | MEDLINE | ID: mdl-38726833

ABSTRACT

Microbial pollution of recreational waters leads to millions of skin, respiratory, and gastrointestinal illnesses globally. Fecal indicator bacteria (FIB) are monitored to assess recreational waters but may not reflect the presence of Staphylococcus aureus, a global leader in bacterial fatalities. Since many community-acquired S. aureus skin infections are associated with high recreational water usage, this study measured and modeled S. aureus, methicillin-resistant S. aureus (MRSA), and FIB (Enterococcus spp., Clostridium perfringens) concentrations in seawater and sand at six beaches in Hilo, Hawai'i, USA, over 37 sample dates from July 2016 to February 2019 using culturing techniques. Generalized linear models predicted bacterial concentrations with physicochemical and environmental data. Beach visitors were also surveyed on their preferred activities. S. aureus and FIB concentrations were roughly 6-78 times higher at beaches with freshwater discharge than at those without. Seawater concentrations of Enterococcus spp. were positively associated with MRSA but not S. aureus. Elevated S. aureus was associated with lower tidal heights, higher freshwater discharge, onsite sewage disposal system density, and turbidity. Regular monitoring of beaches with freshwater input, utilizing real-time water quality measurements with robust modeling techniques, and raising awareness among recreational water users may mitigate exposure to S. aureus, MRSA, and FIB. PRACTITIONER POINTS: Staphylococcus aureus and fecal bacteria concentrations were higher in seawater and sand at beaches with freshwater discharge. In seawater, Enterococcus spp. positively correlated with MRSA, but not S. aureus. Freshwater discharge, OSDS density, water turbidity, and tides significantly predicted bacterial concentrations in seawater and sand. Predictive bacterial models based upon physicochemical and environmental data developed in this study are readily available for user-friendly application.


Subject(s)
Feces , Seawater , Staphylococcus aureus , Seawater/microbiology , Staphylococcus aureus/isolation & purification , Hawaii , Feces/microbiology , Bathing Beaches , Environmental Monitoring , Sand/microbiology , Water Microbiology , Enterococcus/isolation & purification , Methicillin-Resistant Staphylococcus aureus/isolation & purification
4.
Hawaii J Health Soc Welf ; 83(5): 124-131, 2024 May.
Article in English | MEDLINE | ID: mdl-38716137

ABSTRACT

The mental health crisis among Native Hawaiian young adults is exacerbated by colonization-related risk factors, yet cultural identity stands as a key protective element. This study explored the link between cultural identity and stress, employing cultural reclamation theory, and surveyed 37 Native Hawaiians aged 18-24 through the Native Hawaiian Young Adult Well-being Survey. Engagement with culture, the significance of Hawaiian identity, and stress were assessed, revealing significant correlations between cultural and demographic factors and stress levels. Participants displayed high cultural engagement and valued their Hawaiian identity, with gender and education levels playing a notable role in stress. These findings highlight the importance of including Native Hawaiian perspectives in mental health research and may guide the development of targeted interventions.


Subject(s)
Native Hawaiian or Other Pacific Islander , Humans , Male , Female , Hawaii , Young Adult , Adolescent , Surveys and Questionnaires , Native Hawaiian or Other Pacific Islander/psychology , Native Hawaiian or Other Pacific Islander/ethnology , Native Hawaiian or Other Pacific Islander/statistics & numerical data , Mental Health/statistics & numerical data , Stress, Psychological/psychology , Stress, Psychological/ethnology , Social Identification
5.
Hawaii J Health Soc Welf ; 83(5): 138-143, 2024 May.
Article in English | MEDLINE | ID: mdl-38716138

ABSTRACT

Medical education in the US has contributed to institutionalized racism through historically exclusionary practices, which has led to health disparities and inequities in health care today. The 1910 Flexner report, which favored schools with greater resources, led to the closure of nearly half of medical schools in the Us, which were mostly small schools located in rural communities that served economically disadvantaged, ethnic minority, and female populations. Closing these schools ultimately limited the availability of physicians willing to serve disadvantaged and minority populations in impoverished and underserved communities. In order to transform medical education to be more equitable, medical schools must be proactive in opportunity, diversity, and equity efforts. This not only includes efforts in admissions and faculty hiring, but also curricula related to social and health disparities, interracial interactions between students and faculty, and service learning activities that engage and work with marginalized communities. The University of Hawai'i John A. Burns School of Medicine has a longstanding commitment to diversity, which is integral to the school's mission. Providing opportunities to underserved populations has been a priority since establishment of the school. As one of the most diverse univeristies in the US, the school of medicine continues to focus on opportunity, diversity, and equity priorities in both its strategic planning and overall mission.


Subject(s)
Cultural Diversity , Education, Medical , Schools, Medical , Humans , Schools, Medical/statistics & numerical data , Schools, Medical/trends , Schools, Medical/organization & administration , Hawaii , Education, Medical/methods , Education, Medical/trends , History, 20th Century , History, 21st Century
6.
Hawaii J Health Soc Welf ; 83(5): 132-137, 2024 May.
Article in English | MEDLINE | ID: mdl-38716139

ABSTRACT

The 'Tausi Feagaiga (Covenant Keeper) project was a partnership to support the traditional values of tausi matua (caring for one's elders). The partners included a non-governmental organization (Pacific Youth and Community Development), a faith-based organization (Roman Catholic Diocese of Samoa-Pago Pago), and an institute of higher education (University of Hawai'i John A. Burns School of Medicine). The project was created to address the lack of community-based health care such as home health or hospice, and families needing to work outside the home. A culturally based caregiving curriculum was developed to educate caregivers and improve their knowledge and skills. Using a train-the-trainer model, 125 caregivers were trained in family caregiving from 2016-2020. Training was conducted through an intensive workshop followed by practicum at Hope House, the Catholic Diocese home for the aged. Participants who expressed a willingness and competency were mentored to be trainers to continue the 'Tausi Feagaiga project. The mean self-rated confidence in caregiving improved significantly from 3.17 ± 1.02 (mean SD) pre workshop to 3.53 ± 0.71 post workshop (P = .001). Competence in geriatric syndromes was improved from 18.04 ± 4.27 to 21.31 ± 4.30 after attending the workshop (P < .001) and the feedback was extremely positive. Technical assistance was provided to obtain funding through American Samoa Medicaid State Agency to improve the existing infrastructure of Hope House, obtain much needed supplies, and increase ability to hire the participants. 'Tausi Feagaiga positively impacted the lives of the residents of Hope House, the course participants, the elders in the community, and those who care for them.


Subject(s)
Caregivers , Humans , Caregivers/psychology , Caregivers/education , Caregivers/statistics & numerical data , American Samoa , Hawaii , Female , Male , Empowerment
8.
Proc Biol Sci ; 291(2023): 20240330, 2024 May.
Article in English | MEDLINE | ID: mdl-38772417

ABSTRACT

Identifying reliable bioindicators of population status is a central goal of conservation physiology. Physiological stress measures are often used as metrics of individual health and can assist in managing endangered species if linked to fitness traits. We analysed feather corticosterone, a cumulative physiological stress metric, of individuals from historical, translocated, and source populations of an endangered endemic Hawaiian bird, the Laysan duck (Anas laysanensis). We hypothesized that feather corticosterone would reflect the improved reproduction and survival rates observed in populations translocated to Midway and Kure Atolls from Laysan Island. We also predicted less physiological stress in historical Laysan birds collected before ecological conditions deteriorated and the population bottleneck. All hypotheses were supported: we found lower feather corticosterone in the translocated populations and historical samples than in those from recent Laysan samples. This suggests that current Laysan birds are experiencing greater physiological stress than historical Laysan and recently translocated birds. Our initial analysis suggests that feather corticosterone may be an indicator of population status and could be used as a non-invasive physiological monitoring tool for this species with further validation. Furthermore, these preliminary results, combined with published demographic data, suggest that current Laysan conditions may not be optimal for this species.


Subject(s)
Corticosterone , Ducks , Endangered Species , Feathers , Animals , Corticosterone/analysis , Feathers/chemistry , Hawaii , Stress, Physiological , Conservation of Natural Resources , Female , Male
9.
BMC Health Serv Res ; 24(1): 658, 2024 May 23.
Article in English | MEDLINE | ID: mdl-38783284

ABSTRACT

BACKGROUND: The Hawai'i State Department of Health, Child and Adolescent Mental Health Division (CAMHD) has maintained a longstanding partnership with Substance Abuse and Mental Health Services Administration (SAMHSA) to enhance capacity and quality of community-based mental health services. The current study explored CAMHD's history of SAMHSA system of care (SOC) awards and identified common themes, lessons learned, and recommendations for future funding. METHODS: Employing a two-phase qualitative approach, the study first conducted content analysis on seven final project reports, identifying themes and lessons learned based on SOC values and principles. Subsequently, interviews were conducted with 11 system leaders in grant projects and SOC award projects within the state. All data from project reports and interview transcripts were independently coded and analyzed using rapid qualitative analysis techniques. RESULTS: Content validation and interview coding unveiled two content themes, interagency collaboration and youth and family voice, as areas that required long-term and consistent efforts across multiple projects. In addition, two general process themes, connection and continuity, emerged as essential approaches to system improvement work. The first emphasizes the importance of fostering connections in family, community, and culture, as well as within workforce members and child-serving agencies. The second highlights the importance of nurturing continuity throughout the system, from interagency collaboration to individual treatment. CONCLUSIONS: The study provides deeper understanding of system of care evaluations, offering guidance to enhance and innovate youth mental health systems. The findings suggest that aligning state policies with federal guidelines and implementing longer funding mechanisms may alleviate administrative burdens.


Subject(s)
Qualitative Research , United States Substance Abuse and Mental Health Services Administration , Humans , Hawaii , Adolescent , United States , Substance-Related Disorders/therapy , Child , Adolescent Health Services/organization & administration , Interviews as Topic , Mental Health Services/organization & administration , Community Mental Health Services/organization & administration
10.
JAMA Netw Open ; 7(5): e2410253, 2024 May 01.
Article in English | MEDLINE | ID: mdl-38739393

ABSTRACT

Importance: Earlier puberty is associated with adverse health outcomes, such as mental health issues in adolescence and cardiometabolic diseases in adulthood. Despite rapid growth of the Asian American, Native Hawaiian, and Pacific Islander populations in the US, limited research exists on their pubertal timing, potentially masking health disparities. Objective: To examine pubertal timing among Asian American, Native Hawaiian, and Pacific Islander children and adolescents by disaggregating ethnic subgroups. Design, Setting, and Participants: This retrospective cohort study included Asian American, Native Hawaiian, and Pacific Islander youths aged 5 to 18 years assessed for pubertal development at Kaiser Permanente Northern California, a large, integrated health care delivery system. Follow-up occurred from March 2005, through December 31, 2019. Data were analyzed in October 2023. Exposure: Race and ethnicity, categorized into 11 ethnic subgroups: Asian Indian, Chinese, Filipino, Japanese, Korean, Native Hawaiian and Pacific Islander, Other South Asian, Other Southeast Asian, Vietnamese, multiethnic, and multiracial. Main Outcomes and Measures: Pubertal timing was determined using physician-assessed sexual maturity ratings (SMRs). Outcomes included the median age at transition from SMR 1 (prepubertal) to SMR 2 or higher (pubertal) for onset of genital development (gonadarche) in boys, breast development (thelarche) in girls, and pubic hair development (pubarche) in both boys and girls. Results: In this cohort of 107 325 Asian American, Native Hawaiian, and Pacific Islander children and adolescents (54.61% boys; 12.96% Asian Indian, 22.24% Chinese, 26.46% Filipino, 1.80% Japanese, 1.66% Korean, 1.96% Native Hawaiian and Pacific Islander, 0.86% Other South Asian, 3.26% Other Southeast Asian, 5.99% Vietnamese, 0.74% multiethnic, and 22.05% multiracial), the overall median ages for girls' pubarche and thelarche were 10.98 years (95% CI, 10.96-11.01 years) and 10.13 years (95% CI, 10.11-10.15 years), respectively. For boys' pubarche and gonadarche, median ages were 12.08 years (95% CI, 12.06-12.10 years) and 11.54 years (95% CI, 11.52-11.56 years), respectively. Differences between subgroups with earliest and latest median age at onset were 14 months for girls' pubarche, 8 months for thelarche, 8 months for boys' pubarche, and 4 months for gonadarche. In general, Asian Indian, Native Hawaiian and Pacific Islander, and Other South Asian subgroups had the earliest ages at onset across pubertal markers, while East Asian youths exhibited the latest onset. Restricting to those with healthy body mass index did not substantially change the findings. Conclusions and Relevance: In this cohort study of Asian American, Native Hawaiian, and Pacific Islander children and adolescents, pubertal timing varied considerably across ethnic subgroups. Further investigation is warranted to assess whether these differences contribute to observed health disparities in adulthood, such as type 2 diabetes and cardiovascular diseases.


Subject(s)
Asian , Native Hawaiian or Other Pacific Islander , Puberty , Humans , Adolescent , Female , Male , Asian/statistics & numerical data , Child , Native Hawaiian or Other Pacific Islander/statistics & numerical data , Puberty/physiology , Retrospective Studies , Child, Preschool , California , Hawaii , Sexual Maturation/physiology , Pacific Island People
12.
Article in English | MEDLINE | ID: mdl-38791780

ABSTRACT

The Prevent Suicide Hawai'i Taskforce is a state, public, and private partnership of individuals, organizations, and community groups that leads statewide suicide prevention efforts in Hawai'i. The purpose of this evaluation was to identify the progress and barriers of the Taskforce to inform the upcoming 2025 Hawai'i Suicide Prevention Strategic Plan in the following areas: Hope, Help, Heal, Research and Evaluation, and Policy and Advocacy. Utilizing a sequential exploratory mixed-methods approach, 18 key informants were interviewed, followed by a 13-question survey sent to the Taskforce member listserv. Results were analyzed using qualitative coding techniques and descriptive statistics. Interview findings contained six themes: importance of community relationships, interconnection of suicide prevention efforts, progress in diversifying training, organizational challenges, adaptations to the COVID-19 pandemic, and funding challenges. Of the 34 survey respondents, most were involved in the area of Hope (91%). The respondents reported the area with most progress was Hope (87%), and the most important area to address was Help (41%). The majority (82%) of the respondents characterized the level of Taskforce communication as Excellent or Good. Interview and survey data corroborated each other and revealed new insights about the successes and barriers of the Taskforce and their progress in implementing the Strategic Plan. Recommendations included advocating for long-term funding for suicide prevention and building community relationships.


Subject(s)
Suicide Prevention , Humans , Hawaii , COVID-19/prevention & control , Surveys and Questionnaires
14.
Hawaii J Health Soc Welf ; 83(4): 99-107, 2024 Apr.
Article in English | MEDLINE | ID: mdl-38585286

ABSTRACT

When compared to their urban counterparts, rural regions have worse health outcomes and more challenges in health care access. As the only island state in the US, Hawai'i's unique geographic layout may magnify these disparities. However, there are limited publications on the impact of urban-rural disparities in health care in Hawai'i. The study team aimed to identify the challenges rural health care providers face when managing treatment of Parkinson's disease (PD), a complex disease. A self-administered survey was sent to 247 eligible providers who practiced in Hawai'i and prescribed PD medications from 2017-2019. The survey assessed: provider's comfort level in PD management; utilization and accessibility of health care services; perspective on barriers to PD care; and perspective on telemedicine. Providers were categorized into O'ahu providers (OP, urban) and neighbor island (Hawai'i, Kaua'i, and Maui) providers (NIP, rural). The final sample size was 44 providers (18% response rate). NIP were significantly less likely than OP to report access to social workers (P=.025), geriatric services (P=.001), and psychologist/psychiatrist/mental health professionals (P=.009). There were no statistical differences in: criteria used for PD diagnosis, resources utilized for PD education, and comfort in prescribing PD medications. The findings show that NIP are just as engaged and capable in providing PD care as OP. However, NIP encounter more limitations to accessibility, which can affect the quality of PD care that their rural patients receive. Further research is needed to understand how these limitations affect health-related outcomes in PD as well as other chronic diseases.


Subject(s)
Parkinson Disease , Telemedicine , Humans , Aged , Hawaii , Parkinson Disease/drug therapy , Health Services Accessibility , Health Personnel
16.
Hawaii J Health Soc Welf ; 83(4): 108-112, 2024 Apr.
Article in English | MEDLINE | ID: mdl-38585290

ABSTRACT

Purpose is an important construct across contexts and cultures, with evidence suggesting it is strongly related to health, health behaviors, discrimination, and experiences of trauma. In this narrative review of the research on purpose in Hawai'i, the authors identify, critically analyze, and synthesize the extant literature found through a comprehensive literature search. It then discusses important cultural considerations for engaging in purpose research in Hawai'i, broadly, and with the Indigenous people of Hawai'i (Kanaka Maoli). The review presents findings on how sense of purpose levels differ between Hawai'i and the continental United States and risk factors or strengths critical in shaping the development of purpose in Hawai'i. Potential future directions for this line of inquiry conclude this review, with a particular emphasis on the need for integration of Kanaka Maoli ontology and values.


Subject(s)
Health Behavior , Indigenous Peoples , Humans , United States , Hawaii , Risk Factors
17.
PLoS One ; 19(4): e0296820, 2024.
Article in English | MEDLINE | ID: mdl-38620018

ABSTRACT

BACKGROUND: The Worldwide Voyage (WWV) was a 3-year (2014-2017) open-ocean voyage to circumnavigate the world using Indigenous knowledge and navigational skills aboard Hokule'a, a traditionally designed Native Hawaiian (NH) voyaging canoe (wa'a kaulua). Each WWV segment included experienced crew and leadership who were recognized by their voyaging peers as highly experienced in Polynesian oceanic voyaging. This study explored the perceptions and insights of WWV-experienced ocean voyagers on the interconnection between human health and oceanic voyaging. METHODOLOGY: A constructivist approach with a storytelling-based moderator guide was used to conduct focus groups and informant interviews of experienced crew and voyaging leadership. Participants were interviewed and recorded transcripts were analyzed using content analysis. Triangulation of analysis included secondary thematic review by two independent NH cultural practitioners and participant member checking. Purposive sampling was used to enroll 34 of 66 eligible highly experienced voyagers (leadership n = 6; crew n = 28) in 5 focus groups and 4 informant interviews. RESULTS: Six themes emerged: 1) Indigenous context (spiritual and natural environment); 2) Importance of relationships and community; 3) Description of life on the canoe; 4) Holistic health; 5) Mindfulness, stress reduction and emotional health; and 6) Opportunities for intervention. Themes 1-5 were inductive and intricately interrelated, and theme 6 was deductive in that it directly resulted from a moderator guide question. Theme 6 offers strategies to improve the impact of voyaging and health well beyond the physical voyage with recommendations for improved transition back to land and developing a wa'a community context, which reflects a traditional voyaging experience. CONCLUSIONS: Polynesian oceanic voyaging is strongly perceived as a positive and transformative holistic-health-promoting experience. SIGNIFICANCE: Recommendations to promote generalizable health benefits of a voyaging lifestyle offers a promising and culturally grounded approach warranting future studies to understand mechanism and potential impact for improving health inequities.


Subject(s)
Native Hawaiian or Other Pacific Islander , Ships , Humans , Qualitative Research , Hawaii , Focus Groups
18.
Proc Biol Sci ; 291(2020): 20232340, 2024 Apr 10.
Article in English | MEDLINE | ID: mdl-38593845

ABSTRACT

Studies of adaptive radiations have played a central role in our understanding of reproductive isolation. Yet the focus has been on human-biased visual and auditory signals, leaving gaps in our knowledge of other modalities. To date, studies on chemical signals in adaptive radiations have focused on systems with multimodal signalling, making it difficult to isolate the role chemicals play in reproductive isolation. In this study we examine the use of chemical signals in the species recognition and adaptive radiation of Hawaiian Tetragnatha spiders by focusing on entire communities of co-occurring species, and conducting behavioural assays in conjunction with chemical analysis of their silks using gas chromatography-mass spectrometry. Male spiders significantly preferred the silk extracts of conspecific mates over those of sympatric heterospecifics. The compounds found in the silk extracts, long chain alkyl methyl ethers, were remarkably species-specific in the combination and quantity. The differences in the profile were greatest between co-occurring species and between closely related sibling species. Lastly, there were significant differences in the chemical profile between two populations of a particular species. These findings provide key insights into the role chemical signals play in the attainment and maintenance of reproductive barriers between closely related co-occurring species.


Subject(s)
Spiders , Animals , Humans , Male , Hawaii , Species Specificity , Reproductive Isolation , Silk
19.
Nat Commun ; 15(1): 3109, 2024 Apr 10.
Article in English | MEDLINE | ID: mdl-38600100

ABSTRACT

Island systems provide important contexts for studying processes underlying lineage migration, species diversification, and organismal extinction. The Hawaiian endemic mints (Lamiaceae family) are the second largest plant radiation on the isolated Hawaiian Islands. We generated a chromosome-scale reference genome for one Hawaiian species, Stenogyne calaminthoides, and resequenced 45 relatives, representing 34 species, to uncover the continental origins of this group and their subsequent diversification. We further resequenced 109 individuals of two Stenogyne species, and their purported hybrids, found high on the Mauna Kea volcano on the island of Hawai'i. The three distinct Hawaiian genera, Haplostachys, Phyllostegia, and Stenogyne, are nested inside a fourth genus, Stachys. We uncovered four independent polyploidy events within Stachys, including one allopolyploidy event underlying the Hawaiian mints and their direct western North American ancestors. While the Hawaiian taxa may have principally diversified by parapatry and drift in small and fragmented populations, localized admixture may have played an important role early in lineage diversification. Our genomic analyses provide a view into how organisms may have radiated on isolated island chains, settings that provided one of the principal natural laboratories for Darwin's thinking about the evolutionary process.


Subject(s)
Mentha , Humans , Mentha/genetics , Phylogeny , Hawaii , Biological Evolution
20.
Zebrafish ; 21(2): 206-213, 2024 Apr.
Article in English | MEDLINE | ID: mdl-38621213

ABSTRACT

The Ala Wai Canal is an artificial waterway in the tourist district of Waikiki in Honolulu, HI. Originally built to collect runoff from industrial, residential, and green spaces dedicated to recreation, the Ala Wai Canal has since experienced potent levels of toxicity due to this runoff entering the watershed and making it hazardous for both marine life and humans at current concentration, including Danio rerio (zebrafish). A community of learners at educations levels from high school to postbaccalaureate from Oahu, HI was connected through the Consortium for Increasing Research and Collaborative Learning Experiences (CIRCLE) distance research program. This team conducted research with an Investigator and team from Mayo Clinic in Rochester, MN, with the Ala Wai Canal as its primary subject. Through CIRCLE, research trainees sent two 32 oz bottles of Ala Wai- acquired water to a partnered laboratory at the Mayo Clinic in which zebrafish embryos were observed at differing concentrations of the sampled water against a variety of developmental and behavioral assays. Research trainees also created atlases of developmental outcomes in zebrafish following exposure to environmental toxins and tables of potential pesticide contaminants to enable the identification of the substances linked to structural defects and enhanced stress during Ala Wai water exposure experiments.


Subject(s)
Water Pollutants, Chemical , Zebrafish , Humans , Animals , Hawaii , Water , Water Pollutants, Chemical/toxicity , Water Pollutants, Chemical/analysis , Embryo, Nonmammalian/chemistry
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