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Reference genome provide insights into sex determination of silver aworana (Osteoglossum bicirrhosum).
BMC Biol
January 2025
Key Laboratory of Prevention and Control for Aquatic Invasive Alien Species, Ministry of Agriculture and Rural Affairs, Guangdong Modern Recreational Fisheries Engineering Technology Center, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China.
Background: Silver arowana (Osteoglossum bicirrhosum) is a basal fish species with sexual monomorphism, while its sex determination mechanism has been poorly understood, posing a significant challenge to its captive breeding efforts.
Results: We constructed two high-quality chromosome-level genome assemblies for both female and male silver arowana, with scaffold N50 values over 10 Mb. Combining re-sequencing data of 109 individuals, we identified a female-specific region, which was localized in a non-coding region, i.
Effectiveness of Pelvic Floor Muscle and Education-based Therapies on Bladder, Bowel, Vaginal, Sexual, Psychological Function, Quality of Life, and Pelvic Floor Muscle Function in Females Treated for Breast Cancer: A Systematic Review.
Curr Oncol Rep
January 2025
Melbourne School of Health Sciences, The University of Melbourne, The Royal Women's Hospital, Melbourne; Mercy Hospital for Women, Melbourne, VIC, Australia.
Purpose Of Review: Breast malignancy is the most common cancer in females. Symptoms of pelvic floor disorders and sexual dysfunction secondary to systemic cancer treatment may occur. Non-surgical, non-pharmaceutical conservative therapies, namely pelvic floor muscle (PFM) and education-based therapies, could be beneficial to reduce these symptoms in this population.
View Article and Find Full Text PDFEffects of variable mating opportunity, delay, and male mating experience on the lifespan, female reproductive traits, and offspring traits of Phytoseiulus persimilis (Acari: Phytoseiidae).
Exp Appl Acarol
January 2025
Manaaki Whenua - Landcare Research, 231 Morrin Road, Auckland, 1072, New Zealand.
The balance between mating benefits and costs shapes reproductive strategies and life history traits across animal species. For biological control programs, understanding how mating rates influence life history traits is essential for optimising population management and enhancing predator efficacy. This study investigates the impact of mating opportunity availability, delayed mating, and male mating history (copulation frequency) on the lifespan (both sexes), female reproductive traits (duration of oviposition and of pre- and post-oviposition periods, and lifetime oviposition), and offspring quality (egg size and offspring survival) of the predatory mite Phytoseiulus persimilis Athias-Henriot (Acari: Phytoseiidae), an important biological control agent against spider mites.
View Article and Find Full Text PDFAging women in Russia: Between sexless and sexy oldies.
J Women Aging
January 2025
Department of Sociology, European University at St. Petersburg, St Petersburg, Russia.
Women's sexuality as a dimension of embodied identity is shaped and constrained by social norms of gender and age and negotiated by women in complex ways. Discourses of hegemonic bodily normativity ascribe a sexless subjectivity to Russian women in their post-reproductive years, contributing to their social exclusion. At the same time, in modern Russian society a neoliberal concept of "successful active aging" is gradually changing understandings of aging, making later-life sexuality more visible and legitimate.
View Article and Find Full Text PDFComparing the hermaphroditic mating system of a parasitic flatworm between populations with an ancestral, 3-host life cycle and a derived, facultative-precocious life cycle.
Evolution
January 2025
Department of Biology, Texas A&M University, College Station TX.
Evolutionary changes in development and/or host number of parasite life cycles can have subsequent ecological and evolutionary consequences for parasites. One theoretical model based on the mating systems of hermaphroditic parasites assumes a life cycle with fewer hosts will result in more inbreeding, and predicts a truncated life cycle most likely evolves in the absence of inbreeding depression. Many populations of the hermaphroditic trematode Alloglossidium progeneticum maintain an ancestral obligate 3-host life cycle where obligate sexual reproduction occurs among adults in catfish third hosts.
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