The stings of bees, wasps, and ants are something that catches the attention of anyone that experiences them. While many recent studies have focused on the pain inflicted by the stings of various stinging wasps, bees, or ants (Hymenoptera: Aculeata), little is known about how the length of the sting itself varies between species. Here, we investigate the sting length of a variety of aculeate wasps, and compare that to reported pain and toxicity values. We find that velvet ants (Hymenoptera: Mutillidae) have the longest sting compared to their body size out of any bee, wasp, or ant species. We also find that there is no link between relative sting length and pain; however, we did find an inverse relationship between relative sting length and toxicity with taxa having shorter relative stings being more toxic. While we found a significant relationship between host use and relative sting length, we suggest that the long sting length of the velvet ants is also related to their suite of defenses to avoid predation.
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http://dx.doi.org/10.7717/peerj.4743 | DOI Listing |
Nat Commun
January 2025
Department of Biology, The Pennsylvania State University, University Park, PA, USA.
Understanding the process of genetic adaptation in response to human-mediated ecological change will help elucidate the eco-evolutionary impacts of human activity. In the 1930s red imported fire ants (Solenopsis invicta) were accidently introduced to the Southeastern USA, where today they are both venomous predators and toxic prey to native eastern fence lizards (Sceloporus undulatus). Here, we investigate potential lizard adaptation to invasive fire ants by generating whole-genome sequences from 420 lizards across three populations: one with long exposure to fire ants, and two unexposed populations.
View Article and Find Full Text PDFColloids Surf B Biointerfaces
November 2024
Department of Pharmacy, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China; Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China. Electronic address:
Ulcerative colitis is a recurring condition that causes inflammation and sores in the digestive system. Current clinical treatments for ulcerative colitis have limitations due to side effects and poor patient compliance. This study investigates the therapeutic potential of a novel drug delivery system, CA-Gel, which comprises caffeic acid (CA) stabilized by pectin nanoparticles within a poloxamer thermosensitive gel for rectal administration.
View Article and Find Full Text PDFJ Clin Invest
December 2024
State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Guangdong Provincial Clinical Research Center for Cancer.
Child Abuse Negl
December 2024
Faculty of Economics and Management, University of Bolzano, Universitätsplatz 1, 39100 Bolzano, Italy. Electronic address:
Background: Care leavers are often disadvantaged in terms of their mental health compared to the general population. The factors influencing care leavers' mental health in the third decade of their lives have so far not been studied systematically.
Objective: Based on a resource model, external contextual factors before, during and after out-of-home care are examined with regard to their positive or negative effects on mental health.
Nat Commun
October 2024
Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada.
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