Morphological and discrete genetic differences are found between geographically isolated, allopatric, tick populations. However, we have found differences in sympatric tick populations. Notable differences were found in the body size and weight of Dermacentor andersoni collected from a single location in Montana, USA. These ticks were separated in groups consisting of big (B) and small (S) individuals. The objectives of this study were: (a) to characterize genetic diversity in B and S D. andersoni individuals, (b) to evaluate transmissibility of the character associated with body size and weight, and (c) to correlate morphological differences with biological, physiological, and behavioral characteristics. We found extensive genetic variation in 16S rDNA and ITS2 loci in B and S ticks and demonstrated genetic differentiation between B and S individuals. We further provide some support for Mendelian autosomal dominant transmission of characters associated with tick body size and weight. The results reported herein show that B ticks have a better reproductive success than S ticks and suggest partial reproductive isolation of S ticks.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.exppara.2004.10.004 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The relationship between primate distal fibula trabecular architecture and arboreality, phylogeny and size.
J Anat
January 2025
Department of Biology, Università di Pisa, Pisa, Italy.
The fibula, despite being traditionally overlooked compared to the femur and the tibia, has recently received attention in primate functional morphology due to its correlation with the degree of arboreality (DOA). Highlighting further fibular features that are associated with arboreal habits would be key to improving palaeobiological inferences in fossil specimens. Here we present the first investigation on the trabecular bone structure of the primate fibula, focusing on the distal epiphysis, across a vast array of species.
View Article and Find Full Text PDFAssociation between weight-adjusted waist index and obstructive sleep apnea among adults in the United States: data from NHANES (2005-2008 and 2015-2018).
J Int Med Res
January 2025
Quanjiao County People's Hospital, Quanjiao County, Chuzhou, Anhui, China.
Objective: We aimed to examine the relationship between the weight-adjusted waist index (WWI) and obstructive sleep apnea (OSA), a condition often caused by obesity, which remains unclear.
Methods: In this cross-sectional study, we analyzed data from the National Health and Nutrition Examination Survey among adults in the United States (US) aged 20 to 65 years, covering the periods 2005 to 2008 and 2015 to 2018. The study included 8278 participants; we used multivariate logistic regression, restricted cubic splines, and subgroup analyses to explore the relationship between WWI and OSA.
Eye reactions under the influence of drugs of abuse as measured by smartphones: a controlled clinical study in healthy volunteers.
Front Neurosci
January 2025
Kontigo Care AB, Uppsala, Sweden.
Background: It is known that illicit and prescribed drugs impact pupil size, eye movement and function. Still, comprehensive quantitative evaluations under known ambient light conditions are lacking, when smartphones are used for monitoring.
Methods: In this clinical study (NCT05731999), four medicinal products with addiction risks were administered to 48 subjects (18-70 years old, all with informed consent, 12 subjects per drug).
Ethics of Procuring and Using Organs or Tissue from Infants and Newborns for Transplantation, Research, or Commercial Purposes: Protocol for a Bioethics Scoping Review.
Wellcome Open Res
December 2024
National University of Singapore, Singapore, Singapore.
Unlabelled: Since the inception of transplantation, it has been crucial to ensure that organ or tissue donations are made with valid informed consent to avoid concerns about coercion or exploitation. This issue is particularly challenging when it comes to infants and younger children, insofar as they are unable to provide consent. Despite their vulnerability, infants' organs and tissues are considered valuable for biomedical purposes due to their size and unique properties.
View Article and Find Full Text PDFAssociation between triglyceride glucose index-related indices and kidney stones in adults based on NHANES 2007-2020.
Front Endocrinol (Lausanne)
January 2025
Department of Pediatric Surgery, Suining Central Hospital, Suining, Sichuan, China.
Background: The triglyceride-glucose (TyG) index and related indices, including the triglyceride-glucose body mass index (TyG-BMI), triglyceride-glucose waist circumference (TyG-WC), and triglyceride-glucose waist-to-height ratio (TyG-WHtR), are increasingly recognized as valuable markers of insulin resistance (IR). This study aimed to assess the associations between these TyG-related indices and kidney stones.
Methods: This cross-sectional study analyzed data from 10,824 participants obtained from the National Health and Nutrition Examination Survey (NHANES) conducted between 2007 and 2020.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!