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https://www.readbyqxmd.com/read/28325592/intersexuality-in-aquatic-invertebrates-prevalence-and-causes
#1
REVIEW
Tiago F Grilo, Rui Rosa
This review is the first assembling information on intersexuality in aquatic invertebrates, from freshwater to estuarine and marine environments. Intersex is a condition whereby an individual of a gonochorist (separate sexes) species has oocytes or distinct stages of spermatogonia, at varying degrees of development, within the normal gonad of the opposite gender (i.e. spermatocytes in the ovary or oocytes in the testis), often involving alterations in the gonadal structure, reproductive tract or external genitalia...
March 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28319194/genome-wide-analysis-of-brain-and-gonad-transcripts-reveals-changes-of-key-sex-reversal-related-genes-expression-and-signaling-pathways-in-three-stages-of-monopterus-albus
#2
Wei Chi, Yu Gao, Qing Hu, Wei Guo, Dapeng Li
BACKGROUND: The natural sex reversal severely affects the sex ratio and thus decreases the productivity of the rice field eel (Monopterus albus). How to understand and manipulate this process is one of the major issues for the rice field eel stocking. So far the genomics and transcriptomics data available for this species are still scarce. Here we provide a comprehensive study of transcriptomes of brain and gonad tissue in three sex stages (female, intersex and male) from the rice field eel to investigate changes in transcriptional level during the sex reversal process...
2017: PloS One
https://www.readbyqxmd.com/read/28317876/extreme-adaptations-for-probable-visual-courtship-behaviour-in-a-cretaceous-dancing-damselfly
#3
Daran Zheng, André Nel, Edmund A Jarzembowski, Su-Chin Chang, Haichun Zhang, Fangyuan Xia, Haoying Liu, Bo Wang
Courtship behaviours, frequent among modern insects, have left extremely rare fossil traces. None are known previously for fossil odonatans. Fossil traces of such behaviours are better known among the vertebrates, e.g. the hypertelic antlers of the Pleistocene giant deer Megaloceros giganteus. Here we describe spectacular extremely expanded, pod-like tibiae in males of a platycnemidid damselfly from mid-Cretaceous Burmese amber. Such structures in modern damselflies, help to fend off other suitors as well as attract mating females, increasing the chances of successful mating...
March 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28263707/health-and-well-being-of-lesbian-gay-bisexual-transgender-and-intersex-people-aged-50-years-and-over
#4
Mark Hughes
Objectives The aim of the present study was to examine the health and well being of older lesbian, gay, bisexual, transgender and intersex (LGBTI) people, the health issues that concern them, the services they use and challenges accessing services.Methods This study comprised a survey of the health and well being of 312 LGBTI people aged 50 years and over in New South Wales. The survey included the Short-Form 12 (SF-12) measure of health-related quality of life, the Kessler 10 (K10) measure of psychological distress, and the three-item Loneliness Scale...
March 7, 2017: Australian Health Review: a Publication of the Australian Hospital Association
https://www.readbyqxmd.com/read/28221818/intersex-care-development-current-priorities
#5
Heino F L Meyer-Bahlburg
No abstract text is available yet for this article.
February 21, 2017: LGBT Health
https://www.readbyqxmd.com/read/28207902/methamphetamine-treatment-outcomes-among-gay-men-attending-a-lgbti-specific-treatment-service-in-sydney-australia
#6
Toby Lea, Johann Kolstee, Sarah Lambert, Ross Ness, Siobhan Hannan, Martin Holt
Gay and bisexual men (GBM) report higher rates of methamphetamine use compared to heterosexual men, and thus have a heightened risk of developing problems from their use. We examined treatment outcomes among GBM clients receiving outpatient counseling at a lesbian, gay, bisexual, transgender and intersex (LGBTI)-specific, harm reduction treatment service in Sydney, Australia. GBM receiving treatment for methamphetamine use from ACON's Substance Support Service between 2012-15 (n = 101) were interviewed at treatment commencement, and after 4 sessions (n = 60; follow-up 1) and 8 sessions (n = 32; follow-up 2)...
2017: PloS One
https://www.readbyqxmd.com/read/28207204/concise-review-increasing-the-validity-of-cerebrovascular-disease-models-and-experimental-methods-for-translational-stem-cell-research
#7
Johannes Boltze, Franziska Nitzsche, Jukka Jolkkonen, Gesa Weise, Claudia Pösel, Björn Nitzsche, Daniel-Christoph Wagner
Interspecies differences, anatomical and physiological aspects as wells as simplified study designs contribute to an overestimation of treatment effects and limit the transferability of experimental results into clinical applications. Confounders of cell therapies for cerebrovascular disorders (CVD) include common CVD comorbidities, frequent medications potentially affecting endogenous and transplanted stem cells, as well as age- and immune-system-related effects. All of those can contribute to a substantial modelling bias, ultimately limiting the prospective quality of preclinical research programs regarding the clinical value of a particular cell therapy...
February 16, 2017: Stem Cells
https://www.readbyqxmd.com/read/28205594/genome-editing-reveals-dmrt1-as-an-essential-male-sex-determining-gene-in-chinese-tongue-sole-cynoglossus-semilaevis
#8
Zhongkai Cui, Yun Liu, Wenwen Wang, Qian Wang, Ning Zhang, Fan Lin, Na Wang, Changwei Shao, Zhongdian Dong, Yangzhen Li, Yingming Yang, Mengzhu Hu, Hailong Li, Fengtao Gao, Zhanfei Wei, Liang Meng, Yang Liu, Min Wei, Ying Zhu, Hua Guo, Christopher H K Cheng, Manfred Schartl, Songlin Chen
Chinese tongue sole is a marine fish with ZW sex determination. Genome sequencing suggested that the Z-linked dmrt1 is a putative male determination gene, but direct genetic evidence is still lacking. Here we show that TALEN of dmrt1 efficiently induced mutations of this gene. The ZZ dmrt1 mutant fish developed ovary-like testis, and the spermatogenesis was disrupted. The female-related genes foxl2 and cyp19a1a were significantly increased in the gonad of the ZZ dmrt1 mutant. Conversely, the male-related genes Sox9a and Amh were significantly decreased...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28160440/representation-of-speech-variability
#9
REVIEW
Tessa Bent, Rachael F Holt
Speech signals provide both linguistic information (e.g., words and sentences) as well as information about the speaker who produced the message (i.e., social-indexical information). Listeners store highly detailed representations of these speech signals, which are simultaneously indexed with linguistic and social category membership. A variety of methodologies-forced-choice categorization, rating, and free classification-have shed light on listeners' cognitive-perceptual representations of the social-indexical information present in the speech signal...
February 3, 2017: Wiley Interdisciplinary Reviews. Cognitive Science
https://www.readbyqxmd.com/read/28120628/same-sex-partner-bereavement
#10
Lefteris Patlamazoglou, Janette G Simmonds, Tristan L Snell
The experience of same-sex-attracted people who have lost a partner is neglected in the existing literature on bereavement. Previous research on lesbian, gay, bisexual, transgender, intersex, queer and questioning (LGBTIQ) populations tends to focus on the loss of a partner to HIV-related causes, and there is scant research concerning non-HIV-related bereavement. The purpose of this article is to investigate the non-HIV-related bereavement experiences of same-sex partners and to address the potential complications of disenfranchised grief...
January 1, 2017: Omega
https://www.readbyqxmd.com/read/28073070/negotiating-intersex-a-case-for-revising-the-theory-of-social-diagnosis
#11
Tania M Jenkins, Susan E Short
The theory of social diagnosis recognizes two principles: 1) extra-medical social structures frame diagnosis; and 2) myriad social actors, in addition to clinicians, contribute to diagnostic labels and processes. The relationship between social diagnosis and (de)medicalization remains undertheorized, however, because social diagnosis does not account for how social actors can also resist the pathologization of symptoms and conditions-sometimes at the same time as they clamor for medical recognition-thereby shaping societal definitions of disease in different, but no less important, ways...
February 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28069490/sexual-segregation-of-forage-patch-use-support-for-the-social-factors-and-predation-hypotheses
#12
Michael T Biggerstaff, Marcus A Lashley, M Colter Chitwood, Christopher E Moorman, Christopher S DePerno
Nearly all species of sexually dimorphic ungulates sexually segregate. Several hypotheses have been proposed to explain this phenomenon, including the social-factors hypothesis (SFH) and the predation hypothesis (PH). Interestingly, previous studies have accepted and rejected each hypothesis within and across species but few studies have simultaneously tested both hypotheses in the same population. In August 2011 and 2012 using 7680 photographs taken with camera traps in standardized forage patches, we tested two predictions of the SFH: 1) foraging efficiency of both sexes would decrease when foraging rate in mixed-sex groups relative to single-sex groups, and 2) activity patterns (i...
March 2017: Behavioural Processes
https://www.readbyqxmd.com/read/28057709/when-parents-choose-gender-intersex-children-and-the-law
#13
Melanie Newbould
In England and Wales, it is usually lawful for those with parental responsibility to consent to treatment on children who have not acquired legal capacity, providing that they are acting in the child's best interests. Whilst in most instances this process is unproblematic and the decisions made are non-controversial, there are troubling examples where this is more problematic. The difficulties for a family with a child who has an intersex condition will be considered to illustrate that there may be cases of medical and surgical treatment where even though both parents and doctors agree on a course of action in good faith, the treatment administered may not necessarily be in the best interests of the child...
January 5, 2017: Medical Law Review
https://www.readbyqxmd.com/read/28026945/reduction-of-intersex-in-a-wild-fish-population-in-response-to-major-municipal-wastewater-treatment-plant-upgrades
#14
Keegan A Hicks, Meghan L M Fuzzen, Emily K McCann, Maricor J Arlos, Leslie M Bragg, Sonya Kleywegt, Gerald R Tetreault, Mark E McMaster, Mark R Servos
Intersex in fish downstream of municipal wastewater treatment plants (MWWTPs) is a global concern. Consistent high rates of intersex in male rainbow darter (Etheostoma caeruleum) have been reported for several years in the Grand River, in southern Ontario, Canada, in close proximity to two MWWTPs. The larger MWWTP (Kitchener) recently underwent upgrades that included the conversion from a carbonaceous activated sludge to nitrifying activated sludge treatment process. This created a unique opportunity to assess whether upgrades designed to improve effluent quality could also remediate the intersex previously observed in wild fish...
January 12, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/27997231/transgender-health-new-zealand-s-innovative-statistical-standard-for-gender-identity
#15
Frank Pega, Sari L Reisner, Randall L Sell, Jaimie F Veale
The implementation of the New Zealand government's recently developed statistical standard for gender identity has led to, and will stimulate further, collection of gender identity data in administrative records, population surveys, and perhaps the census. This will provide important information about the demographics, health service use, and health outcomes of transgender populations to allow evidence-based policy development and service planning. However, the standard does not promote the two-question method, risking misclassification and undercounts; does promote the use of the ambiguous response category "gender diverse" in standard questions; and is not intersex inclusive...
February 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/27996180/non-lethal-laparoscopic-detection-of-intersex-testicular-oocytes-in-largemouth-bass-micropterus-salmoides-and-smallmouth-bass-micropterus-dolomieu
#16
Alexander H Macleod, Vicki S Blazer, Mark A Matsche, Lance T Yonkos
Intersex in wild fish populations has received considerable attention in the scientific literature and public media. Conventional detection of testicular oocytes (TO), the presence of immature oocytes within testis of male fish, employs transverse sectioning of excised testis and is lethal. This present study used a non-lethal laparoscopic technique to collect biopsies of testis from black bass, entering the body cavity via the genital pore. Detection of TO was compared between biopsy and conventional methods using 79 smallmouth bass (SMB) Micropterus dolomieu from 8 sites and 68 largemouth bass (LMB) M...
December 20, 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/27940159/dmrt1-is-necessary-for-male-sexual-development-in-zebrafish
#17
Kaitlyn A Webster, Ursula Schach, Angel Ordaz, Jocelyn S Steinfeld, Bruce W Draper, Kellee R Siegfried
The dmrt1 (doublesex and mab-3 related transcription factor 1) gene is a key regulator of sex determination and/or gonadal sex differentiation across metazoan animals. This is unusual given that sex determination genes are typically not well conserved. The mechanisms by which zebrafish sex is determined have remained elusive due to the lack of sex chromosomes and the complex polygenic nature of sex determination in domesticated strains. To investigate the role of dmrt1 in zebrafish sex determination and gonad development, we isolated mutations disrupting this gene...
December 8, 2016: Developmental Biology
https://www.readbyqxmd.com/read/27938637/conducting-rigorous-research-with-subgroups-of-at-risk-youth-lessons-learned-from-a-teen-pregnancy-prevention-project-in-alaska
#18
Kathryn Hohman-Billmeier, Margaret Nye, Stephanie Martin
In 2010, Alaska Department of Health and Social Services (DHSS) received federal funding to test an evidence-based teen pregnancy prevention program. The grant required a major modification to an existing program and a randomized control trial (RCT) to test its effectiveness. As the major modifications, Alaska used peer educators instead of adults to deliver the program to youth aged 14-19 instead of the original curriculum intended age range of 12-14. Cultural and approach adaptations were included as well...
2016: International Journal of Circumpolar Health
https://www.readbyqxmd.com/read/27932634/a-narrative-review-of-the-literature-about-people-with-intellectual-disability-who-identify-as-lesbian-gay-bisexual-transgender-intersex-or-questioning
#19
Nathan J Wilson, Jemima Macdonald, Brenda Hayman, Alexandra M Bright, Patsie Frawley, Gisselle Gallego
This narrative review of the research literature presents a summary about the key issues facing people with intellectual disability (ID) who identify as lesbian, gay, bisexual, transgender, intersex or questioning (LGBTIQ). The aim of this review was to consolidate research of the topic; to identify whether any pilot studies reporting social/sexual/educational interventions had been published; and to offer some perspective on the type of future research required to better inform policy, practice and theory that may lead to better outcomes for people with ID who identify as LGBTIQ...
December 8, 2016: Journal of Intellectual Disabilities: JOID
https://www.readbyqxmd.com/read/27885615/the-white-mullet-mugil-curema-as-biological-indicator-to-assess-environmental-stress-in-tropical-coastal-lagoons
#20
Alejandra García-Gasca, Julián Ríos-Sicairos, Rubí Hernández-Cornejo, Isabel Cunha, Jesús N Gutiérrez, Héctor Plascencia-González, Luz María García de la Parra, Selene Abad-Rosales, Miguel Betancourt-Lozano
Several coastal lagoons and estuaries in Mexico receive untreated domestic and industrial discharges which contain complex mixtures of contaminants. In order to assess the effects of chemical contamination, we used the White mullet (Mugil curema) as biological indicator. We worked in two estuaries located in Northwest Mexico: Urias (highly polluted) and Teacapan (less polluted, therefore used as reference site). We measured several endpoints at different levels of biological organization: vitellogenin transcription in males as biomarker of estrogenic contamination, as well as reproductive, morphological (deformities), morphometric, and meristic parameters...
December 2016: Environmental Monitoring and Assessment
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