Scavenging behavior by Phyllonotus oculatus (Gastropoda: Muricidae) in a South Atlantic reef

Scavengers play a key role in nutrient cycling and in the energy transfer between the terrestrial-aquatic interface (Beasley et al. 2012). Obligatory scavengers feed exclusively on carrion, while some predator species act opportunistically as facultative scavengers when carrion is available (Morton 2006; Moleón and Sánchez-Zapata 2015). Species of the gastropod family Muricidae, such as Ergalatax contracta (Reeve, 1846), display the opportunistic habit of scavenging other predators’ leftovers on subtidal sands (Morton 2006). Muricidae is one of the largest families of carnivorous snails, utilizing a specialized shell-drilling ability to assess their prey (Dietl and Herbert 2005)

Sea Cucumber (Holothuria arguinensis) as a Shelter for Juvenile Fish (Diplodus bellottii) in the Gulf of Cadiz (Southwestern Spain)

During a diving survey on soft-bottom habitats in the Gulf of Cadiz (Southwestern Spain), the use of the sea cucumber Holothuria arguinensis (Echinodermata, Holothuriidae) as a shelter by juvenile Senegal's sea bream Diplodus bellottii (Chordata: Sparidae) was observed. Eight juvenile sea bream D. bellottii were videoed sheltering under the sea cucumber's body. This observation highlights the importance of sea cucumbers as a shelter for juvenile fish, providing a microhabitat to take refuge from predators. This is the first report of juvenile sea bream sheltered by a sea cucumber

Width/length–weight relationships and condition factor of seven decapod crustaceans in a Brazilian tropical estuary

The analysis of body relationships and condition factors are useful tools in studies of marine populations, and they have been widely used in fishery research and management. In this study, width–weight (WWR) and length–weight (LWR) relationships and Fulton's condition factors were analyzed for six commercially important decapod crustacean species from the Paraguaçu River estuary (Todos os Santos Bay), eastern Brazil, namely Callinectes danae, C. exasperatus, C. marginatus, C. ornatus, Goniopsis cruentata and Ucides cordatus, and one non-indigenous species, Charybdis helleri. In total 5,704 individuals were measured and weighed during five years (2012–2017). The three allometric growth types for the crustacean species were observed, being most frequently the negative allometric growth. The analysis of covariance (ANCOVA) revealed significant differences between the sexes and climatic seasons in WWR/LWRs for the four species of the genus Callinectes, C. helleri, G. cruentata and U. cordatus, except for females and males of C. danae in WWR. The means for condition factor were generally higher for females than for males during the dry period, and in general, indicating good conditions for crustacean species. This study provided morpho-biometric parameters information will contribute stock management of traditional artisanal fisheries, and enable future comparative studies of populations of the same species.9 página

Avaliação do Implante Visível de Elastómero Fluorescente (VIFE) em Tricogaster trichopterus (Pallas, 1770) em cativeiro, incluindo informações sobre a técnica utilizada

 This study evaluated the non invasive, visible implant fluorescent elastomer (VIFE) application, using the fish species’ Tricogaster trichopterus as a model, and aiming to verify the possibility of existing interferences on the development and behavior of implanted individuals for the ex situ management. It brings the first results of the applications of this method in Brazil and its results demonstrate that the bio elastomer is an adequate method, truly viable, safe and of employment in a natural environment conditions as management efforts, contributing, thus, to the knowledge of the dynamics, ecology and the actual status of fishery stocks. O presente trabalho avaliou a implantação de um polímero fluorescente (VIFE) não invasivo utilizando como modelo o peixe ornamental tricogáster, Tricogaster trichopterus (Pallas, 1770) (Perciformes, Osphronemidae), no intuito de verificar se existem possíveis interferências no crescimento dos indivíduos submetidos ao manejo ex-situ. Este trabalho traz os primeiros resultados utilizando este método em território brasileiro e os resultados mostram que o bioeslastômero é um método adequado, extremamente viável, seguro e possivelmente aplicável no ambiente natural em monitoramentos, colaborando assim com o entendimento da dinâmica, bioecologia das espécies e status das condições dos estoques pesqueiros

Raman evidence for pressure-induced formation of diamondene.

Despite the advanced stage of diamond thin-film technology, with applications ranging from superconductivity to biosensing, the realization of a stable and atomically thick two-dimensional diamond material, named here as diamondene, is still forthcoming. Adding to the outstanding properties of its bulk and thin-film counterparts, diamondene is predicted to be a ferromagnetic semiconductor with spin polarized bands. Here, we provide spectroscopic evidence for the formation of diamondene by performing Raman spectroscopy of double-layer graphene under high pressure. The results are explained in terms of a breakdown in the Kohn anomaly associated with the finite size of the remaining graphene sites surrounded by the diamondene matrix. Ab initio calculations and molecular dynamics simulations are employed to clarify the mechanism of diamondene formation, which requires two or more layers of graphene subjected to high pressures in the presence of specific chemical groups such as hydroxyl groups or hydrogens

OS BENEFÍCIOS DA ATIVIDADE FÍSICA PARA O TRATAMENTO DO TRANSTORNO DE ANSIEDADE GENERALIZADA E DEPRESSÃO EM PACIENTES ADULTOS: UMA REVISÃO INTEGRATIVA

Identificar na literatura científica as características benefícas dos impactos da atividade física para o processo de controle e tratamento do Transtorno de Ansiedade Generalizada em pacientes adultos. Método: revisão integrativa, cujos critérios de elegibilidade dos artigos foram: corresponder aos descritores “Transtorno de ansiedade”; “Ansiedade” e “Atividade física”, ser artigo de pesquisa; estar nos idioma português, inglês e espanhol; estar disponível eletronicamente nas bases de dados BVS (Biblioteca Virtual em Saúde) e as fontes de dados Scientific Eletronic Library onLine (SciELO) e Brazilian Journal of Health Review (BJHR), ano de publicação referente ao período de 2013 a 2023. Resultados: encontraram-se 08 publicações expressivas. A análise ocorreu mediante leituras analíticas e interpretativas. Considerações finais: A importância da atividade física para o tratamento da TAB são promissoras e acenam para a utilização de exercícios físicos aeróbios como auxiliares das terapêuticas tradicionais.https://revistaft.com.br/os-beneficios-da-atividade-fisica-para-o-tratamento-do-transtorno-de-ansiedade-generalizada-e-depressao-em-pacientes-adultos-uma-revisao-integrativa

A SARS-CoV-2 Negative Antigen Rapid Diagnostic in RT-qPCR Positive Samples Correlates With a Low Likelihood of Infectious Viruses in the Nasopharynx

Severe acute respiratory syndrome-related coronavirus (SARS-CoV-2) transmission occurs even among fully vaccinated individuals; thus, prompt identification of infected patients is central to control viral circulation. Antigen rapid diagnostic tests (Ag-RDTs) are highly specific, but sensitivity is variable. Discordant RT-qPCR vs. Ag-RDT results are reported, raising the question of whether negative Ag-RDT in positive RT-qPCR samples could imply the absence of infectious viruses. To study the relationship between negative Ag-RDT results with virological, molecular, and serological parameters, we selected a cross-sectional and a follow-up dataset and analyzed virus culture, subgenomic RNA quantification, and sequencing to determine infectious viruses and mutations. We demonstrated that RT-qPCR positive while SARS-CoV-2 Ag-RDT negative discordant results correlate with the absence of infectious virus in nasopharyngeal samples. A decrease in sgRNA detection together with an expected increase in detectable anti-S and anti-N IgGs was also verified in these samples. The data clearly demonstrate that a negative Ag-RDT sample is less likely to harbor infectious SARS-CoV-2 and, consequently, has a lower transmissible potential

Health-related quality of life in patients with type 1 diabetes mellitus in the different geographical regions of Brazil : data from the Brazilian Type 1 Diabetes Study Group

Background: In type 1 diabetes mellitus (T1DM) management, enhancing health-related quality of life (HRQoL) is as important as good metabolic control and prevention of secondary complications. This study aims to evaluate possible regional differences in HRQoL, demographic features and clinical characteristics of patients with T1DM in Brazil, a country of continental proportions, as well as investigate which variables could influence the HRQoL of these individuals and contribute to these regional disparities. Methods: This was a retrospective, cross-sectional, multicenter study performed by the Brazilian Type 1 Diabetes Study Group (BrazDiab1SG), by analyzing EuroQol scores from 3005 participants with T1DM, in 28 public clinics, among all geographical regions of Brazil. Data on demography, economic status, chronic complications, glycemic control and lipid profile were also collected. Results: We have found that the North-Northeast region presents a higher index in the assessment of the overall health status (EQ-VAS) compared to the Southeast (74.6 ± 30 and 70.4 ± 19, respectively; p < 0.05). In addition, North- Northeast presented a lower frequency of self-reported anxiety-depression compared to all regions of the country (North-Northeast: 1.53 ± 0.6; Southeast: 1.65 ± 0.7; South: 1.72 ± 0.7; Midwest: 1.67 ± 0.7; p < 0.05). These findings could not be entirely explained by the HbA1c levels or the other variables examined. Conclusions: Our study points to the existence of additional factors not yet evaluated that could be determinant in the HRQoL of people with T1DM and contribute to these regional disparities