Convergence is Only Skin Deep: Craniofacial Evolution in Electric Fishes from South America and Africa (Apteronotidae and Mormyridae)

Apteronotidae and Mormyridae are species-rich clades of weakly electric fishes from Neotropical and Afrotropical freshwaters, respectively, known for their high morphological disparity and often regarded as a classic example of convergent evolution. Here, we use CT-imaging and 3D geometric morphometrics to quantify disparity in craniofacial morphologies, and to test the hypothesis of convergent skull-shape evolution in a phylogenetic context. For this study, we examined 391 specimens representing 78 species of Apteronotidae and Mormyridae including 30 of 37 (81%) of all valid genera with the goal to sample most of the craniofacial disparity known in these clades. We found no overlap between Apteronotidae and Mormyridae in the skull-shape morphospace using PCA and a common landmark scheme, and therefore no instances of complete phenotypic convergence. Instead, we found multiple potential instances of incomplete convergence, and at least one parallel shift among electric fish clades. The greatest components of shape variance in both families are the same as observed for most vertebrate clades: heterocephaly (i.e., opposite changes in relative sizes of the snout and braincase regions of the skull), and heterorhynchy (i.e., dorsoventral changes in relative snout flexion and mouth position). Mormyrid species examined here exhibit less cran- iofacial disparity than do apteronotids, potentially due to constraints associated with a larger brain size, ecological constraints related to food-type availability. Patterns of craniofacial evolution in these two clades depict a complex story of phenotypic divergence and convergence in which certain superficial similarities of external morphology obscure deeper osteological and presumably developmental differences of skull form and function. Among apteronotid and mormyrid electric fishes, craniofa- cial convergence is only skin deep

Diet and Foraging Behaviors of Timber Rattlesnakes, Crotalus horridus, in Eastern Virginia

During a 17-yr telemetry study, we examined the diet and ambush behavior of a population of Crotalus horridus in southeastern Virginia. Forty dietary items were identified from 37 fecal samples. We documented 722 instances of snakes in an ambush posture, 61 of which were in a vertical-tree posture, as if hunting arboreal prey at the base of a tree. The most common prey items were Eastern Gray Squirrels (Sciurus carolinensis), which accounted for 45 of all dietary items and represented an estimated 78 of total biomass consumed by C. horridus. Prey was not consumed in proportion to availability, based on small mammal surveys. Our analysis provides indirect evidence that the vertical-tree foraging behavior is adopted to target arboreal Eastern Gray Squirrels. Further, we provide support for the hypothesis that C. horridus alters ambush behavior to forage selectively for specific prey types

Diet and Foraging Behaviors of Timber Rattlesnakes, \u3ci\u3eCrotalus Horridus\u3c/i\u3e, in Eastern Virginia

During a 17-yr telemetry study, we examined the diet and ambush behavior of a population of Crotalus horridus in southeastern Virginia. Forty dietary items were identified from 37 fecal samples. We documented 722 instances of snakes in an ambush posture, 61% of which were in a vertical-tree posture, as if hunting arboreal prey at the base of a tree. The most common prey items were Eastern Gray Squirrels (Sciurus carolinensis), which accounted for 45% of all dietary items and represented an estimated 78% of total biomass consumed by C. horridus. Prey was not consumed in proportion to availability, based on small mammal surveys. Our analysis provides indirect evidence that the vertical-tree foraging behavior is adopted to target arboreal Eastern Gray Squirrels. Further, we provide support for the hypothesis that C. horridus alters ambush behavior to forage selectively for specific prey types

It's definitely not Alzheimer's: perceived benefits and drawbacks of a mild cognitive impairment diagnosis

Objectives. To understand the perceived benefits and drawbacks of a mild cognitive impairment (MCI) diagnosis from the perspective of those living with the label. Methods. Participants were included if they had recently (within 6 months) received a MCI diagnosis. We also recruited close family members to gain their perspectives. Each was interviewed separately with a semi-structured topic guide covering three areas: (1) experience of cognitive impairments and changes in the individual; (2) impact of cognitive impairment(s) on daily activities and social relationships; and (3) experience of the diagnosis process and living with the label. Transcribed interviews were stored in Nvivo". Grounded theory procedures of memo writing, open coding, constant comparison, and focused coding were used to derive conceptual themes. Results. Eighteen dyads were interviewed.The overarching themes surrounding diagnosis benefits and drawbacks were as follows: (1) emotional impact of the diagnosis; (2) practical benefits and limitations of the diagnosis, in terms of (a) understanding one’s symptoms and (b) access to clinical support. Although participants were glad to have clinical support in place, they expressed frustration at the lack of clarity, and the lack of available treatments for MCI. Consequently, living with MCI can be characterized as an ambivalent experience. Conclusion. As a clinical label,MCI appears to have little explanatory power for people living with cognitive difficulties. Work is needed to clarify how clinicians and patients communicate about MCI, and how people can be helped to live well with the label. Despite an emerging body of prognostic studies, people with MCI are likely to continue living with significant uncertainty

Incorporating Universal Design into Tsunami Modeling Results for Cascadia Subduction Zone Faults to Create an Inundation Map and Universally Designed Evacuation Map for Port Angeles, WA

Current tsunami hazard inundation and evacuation maps in the Puget Sound are based primarily on Cascadia and Seattle fault tsunamis. The standard evaluation process for tsunami impacts focuses on elevation and hypothetical fault rupture of known and predicted earthquakes. However, there are several known tsunami deposits in the Puget Sound that are not from Cascadia or Seattle fault tsunamis, potentially from other faults within the region, that could affect tsunami mitigation. Work to understand newly discovered crustal deformation and faults in Puget Sound is ongoing, therefore evacuation and inundation maps need to be updated to include these new faults and integrate universal design more broadly. Methods involved using GeoClaw software to map tsunamis from the Cascadia Subduction Zone (CSZ), Leech River fault (LRF), and Utsalady Point fault (UPF). Modeled tsunamis determined the overall inundation of Port Angeles, Washington through a wide range of earthquake inputs of magnitude, proximity, and recurrence. The output simulations were evaluated with key components of universal design to create a new tsunami hazard map. Comparison between the universal design-based map to current the tsunami hazard map allowed for an evaluation of the current evacuation map. This evaluation can improve the assessment of bridges and other evacuation mechanisms. This research can contribute to future tsunami hazard map revisions saving lives, can help with emergency management planning, and spur reevaluating evacuation plans within the tsunami impact area

Realising governmentality: pastoral power, governmental discourse and the (re)constitution of subjectivities

Michel Foucault’s concept of governmentality has been hugely influential in sociology and other disciplinary fields. However, its application has been criticised by those who suggest it neglects agency, and gives overwhelming power to governmental discourses in constituting subjectivities, determining behaviour, and reproducing social reality. Drawing on posthumously translated lecture transcripts, we suggest that Foucault’s nascent concept of pastoral power offers a route to a better conceptualisation of the relationship between discourse, subjectivity and agency, and a means of understanding the (contested, non-determinate, social) process through which governmental discourses are shaped, disseminated, and translated into action. We offer empirical examples from our work in healthcare of how this process takes place, present a model of the key mechanisms through which contemporary pastoral power operates, and suggest future research avenues for refining, developing or contesting this model

Pædagogers arbejde med børn og unge i fritidspædagogikken : Fritidspædagogikkens betydning for børn og unges trivsel, udvikling og livsmuligheder

Denne rapport formidler centrale resultater fra et forskningsprojekt, der har haft fokus på fritidspædagogikkens betydning for børn og unges trivsel, udvikling og livsmuligheder. Rapporten tager afsæt i et forskningsprojekt, der økonomisk er støttet af BUPL’s Forskningsfond, og som har forløbet over et år i perioden 2021-2023. I denne periode har pædagoger, ledere samt børn og unge bidraget med vigtig viden til at udforske, hvordan det fritidspædagogiske arbejde rummer muligheder for at arbejde med børn og unges trivsel, men også, hvordan det fritidspædagogiske arbejde rummer muligheder for at skabe trivsel og forebygge oplevelser af mistrivsel

Occurrence of medical co-morbidity in mild cognitive impairment: implications for generalisation of MCI research

Background: diagnosis of mild cognitive impairment (MCI) typically excludes individuals with medical co-morbidity. Interest in MCI screening raises the questions of what are the best criteria to identify a representative sample and what factors are associated with MCI progression to dementia