ABSTRACT
PURPOSE: In many Orthopteran species, including crickets, forewings exhibit substantial sexual dimorphism driven by sexual selection. In the cricket, Acheta domesticus, females are the 'choosy' sex and males exhibit multiple sexual signals to attract and successfully mate. Male forewings have highly specialized structures critical for acoustic signaling and mating. In contrast, female forewings currently serve no known purpose in this flightless species. Forewings also differ morphologically with male forewings containing complex acoustic producing and resonating regions and females lacking any defined structures. Due to their importance to mating as well as their structural complexity, impacts of environmental stress that target cricket forewing development may therefore have more severe consequences in males than females. Here, we investigate the sensitivity of a sexually dimorphic trait, forewing morphology, to an early life environmental stressor. MATERIALS AND METHODS: We applied ionizing radiation (0--27.8 Gy) as a stressor as dose can be precisely applied as well as its relevance in both environmental contamination and use in the Sterile Insect Technique. RESULTS: A canonical variate analysis indicated that wing shape was significantly altered in males at all doses; .58 Gy, 2.3 Gy, 4.6 Gy, 16.2 Gy, and 23.2 Gy. In females, shape was significantly altered at 27.8 Gy and 23.2 Gy groups and to a lesser extent at .58 Gy and 16.2 Gy. Linear regression analysis of centroid size indicated a dose dependent decline in wing size in both sexes, with males exhibiting more decline. Fluctuating asymmetry, a measure of environmental sensitivity, revealed that males were more sensitive to shape changes due to stress than females. This difference in sensitivity is likely due to the complexity of male forewings. CONCLUSION: These results expand understanding of sex dimorphism in stress responses and sensitivity to ionizing radiation.
Subject(s)
Gryllidae , Infertility , Animals , Male , Female , Gryllidae/anatomy & histology , Insecta , Sex Characteristics , Radiation, IonizingABSTRACT
BACKGROUND AND OBJECTIVES: Children with medical complexity have been disproportionately impacted by the COVID-19 pandemic and the associated changes in healthcare delivery. The primary objective of this study was to gain a thorough understanding of the lived experiences of family caregivers of children with medical complexity during the pandemic. METHODS: We conducted semi-structured interviews with family caregivers of children with medical complexity from a tertiary pediatric hospital. Interview questions focused on the aspects of caregiving for children with medical complexity, impact on caregiver mental and physical well-being, changes to daily life secondary to the pandemic, and experiences receiving care in the healthcare system. Interviews were conducted until thematic saturation was achieved. Interviews were audio recorded, deidentified, transcribed verbatim, coded and analyzed using content analysis. RESULTS: Twelve semi-structured interviews were conducted. The interviews revealed three major themes and several associated subthemes: (1) experiences with the healthcare system amid the pandemic (lack of access to healthcare services and increased hospital restrictions, negative clinical interactions and communication breakdowns, virtual care use); (2) common challenges during the pandemic (financial strain, balancing multiple roles, inadequate homecare nursing); and (3) the pandemic's impact on family caregiver well-being (mental toll, physical toll). CONCLUSIONS: Family caregivers of children with medical complexity experienced mental and physical burden due to the intense nature of their caregiving responsibilities that were exacerbated during the pandemic. Our results highlight key priorities for the development of effective interventions to support family caregivers and their children.
