In this study, we aimed to investigate the anticancer activity of the extract, fractions, and isolated compounds of the flowers of Fridericia platyphylla, and to characterize the bioactive compounds. The chemical diversity of the extracts and fractions was investigated using liquid chromatography coupled with high resolution mass spectrometry (LC-HRMS). We were able to annotate 26 compounds from the classes of flavones, flavonols, flavanones, isoflavones, and cinnamic acid and its derivatives. The dichloromethane fraction showed greater cytotoxicity at a concentration of 100 µg mL−1. In addition, the inhibitory concentrations of the dichloromethane fraction were 22.14 and 30.9 µg mL−1 for MCF-7 and MDA-MB-231 cell lines, respectively, and were capable of inhibiting tumor cell migration. Brachydins A and C were isolated from the dichloromethane fraction and showed the greatest cytotoxicity. The results obtained from this study show the potential biological effect of F. platyphylla flowers as a possible antitumor pharmacological agent. extract LCHRMS. LCHRMS LC HRMS . (LC-HRMS) 2 flavones flavonols flavanones isoflavones derivatives 10 mL1 mL 1 addition 2214 22 14 22.1 309 30 9 30. mL− MCF7 MCF 7 MCF- MDAMB231 MDAMB MDA MB 231 MDA-MB-23 lines respectively migration F agent (LC-HRMS 221 22. 3 MDAMB23 23 MDA-MB-2 MDAMB2 MDA-MB- MDA-MB

SUMMARY OBJECTIVE: The aim of the study was to compare the postoperative effects of endotracheal tube cuff inflation with alkalized lidocaine in patients undergoing thyroidectomy surgery. METHODS: This is a randomized, double-blind clinical trial between August 2020 and August 2022 at the Hospital São Domingos, São Luís, Maranhão, Brazil. Patients over 18 years who underwent thyroidectomy of both sexes, American Society of Anesthesiologists (ASA) I or ASA II, were included. Patients with difficult orotracheal intubation, smoking, cuff rupture during orotracheal intubation, heart, lung, or neuropathies, previous surgery of the larynx or trachea, with risk of aspiration of gastric contents, or with the need to use a nasogastric tube were excluded. Patients were randomly selected and divided into the control group, whose cuff was filled with 0.9% saline solution, and the alkalinized lidocaine group, where the cuff was filled with 2% lidocaine and 8.4% sodium bicarbonate. RESULTS: The control group had higher systolic blood pressure [137 (94–183) mmHg] medians after extubation than the alkalinized lidocaine group [127 (82–189) mmHg] (p=0.03). The same was observed in heart rate values [control group: 86 (62–120); alkalinized lidocaine group: 80 (53–120)] (p=0.034). The alkalinized lidocaine group showed a significant increase in the ability to sustain phonation in the 24 h postoperatively, from 82.0 to 98.0% (p=0.031). CONCLUSION: There was no protective effect of the use of alkalinized lidocaine on the sensation of swallowing and complaints after thyroidectomy surgery. There was a significant improvement in hemodynamic response in the intervention group after extubation. OBJECTIVE METHODS randomized doubleblind double blind 202 Domingos Luís Maranhão Brazil 1 sexes (ASA II included intubation smoking lung neuropathies trachea contents excluded 09 0 9 0.9 solution 2 84 8 4 8.4 bicarbonate RESULTS 137 [13 94–183 94183 94 183 (94–183 mmHg 127 [12 82–189 82189 82 189 (82–189 p=0.03. p003 p p=0.03 . 03 (p=0.03) 62–120 62120 62 120 (62–120) 53–120 53120 53 (53–120) p=0.034. p0034 p=0.034 034 (p=0.034) postoperatively 820 82. 980 98 98.0 p=0.031. p0031 p=0.031 031 (p=0.031) CONCLUSION 20 0. 8. 13 [1 94–18 9418 (94–18 12 82–18 8218 (82–18 p00 p=0.0 (p=0.03 62–12 6212 6 (62–120 53–12 5312 5 (53–120 (p=0.034 98. (p=0.031 [ 94–1 941 (94–1 82–1 821 (82–1 p0 p=0. (p=0.0 62–1 621 (62–12 53–1 531 (53–12 94– (94– 82– (82– p=0 (p=0. 62– (62–1 53– (53–1 (94 (82 p= (p=0 (62– (53– (9 (8 (p= (62 (53 ( (p (6 (5

Abstract The main objective of this study was to optimize the fermentation process using Serratia sp. BR13816, a bacterial isolate from Amazonian soil, and to evaluate the formation of nanoemulsions. Submerged fermentation was carried out with different carbon and nitrogen sources. Based on the emulsification index and surface tension results, we selected a hydrophobic (corn oil) and a hydrophilic (glycerol) carbon source, and a nitrogen one (urea). For fermentation using corn oil/urea greater emulsification indexes and lower surface tensions were verified at pH 8, 25 °C, and 48 h, whereas for glycerol/urea-supplemented medium the best conditions were attained at pH 7, 30 °C, and 96 h. These pre-selected factors (pH, temperature, and time) were used in a central composite rotatable design (CCRD) for an additional fermentation optimization of the two carbon/nitrogen mediums, corn oil/urea and glycerol/urea. The two best nutritional systems based on corn oil/urea and glycerol/urea were selected using a central composite rotatable design (CCRD). The mathematical models using the response surface methodology showed adequate adjustment. The best run of the experimental design for corn oil/urea (6.00% /0.60%) and glycerol/urea (3.00% /1.40%) systems presented surface tension values of 35.70 mN/m and 37.10 mN/m, respectively. The nanoemulsions produced by a low-energy method presented average sizes by dynamic light scattering varying from 453.1 nm to 667.3 nm when 0.1% of the oil was employed. Therefore, Serratia sp. BR13816 showed promising biosurfactant-producing potential for future industrial applications. sp BR soil sources results glycerol (glycerol source urea. urea . (urea) oilurea 8 2 C °C 4 h glycerol/ureasupplemented glycerolureasupplemented supplemented 7 3 9 preselected pre pH, (pH temperature time CCRD (CCRD carbonnitrogen mediums glycerolurea CCRD. adjustment 6.00% 600 6 00 (6.00 /0.60% 060 0 60 3.00% 300 (3.00 /1.40% 140 1 40 3570 35 70 35.7 mNm mN m 3710 37 10 37.1 respectively lowenergy low energy 4531 453 453. 6673 667 667. 01 0.1 employed Therefore BR1381 biosurfactantproducing biosurfactant producing applications (urea ureasupplemented 6.00 (6.0 /0.60 06 3.00 (3.0 /1.40 14 357 35. 371 37. 45 66 0. BR138 6.0 (6. /0.6 3.0 (3. /1.4 BR13 6. (6 /0. 3. (3 /1. BR1 ( /0 /1 /

ABSTRACT Objective: MicroRNAs are small non-coding RNAs that are abundantly expressed in various biofluids, making them promising candidates for cancer biomarkers. This review aims to present current evidence on the use of miRNA as biomarkers for the non-invasive diagnosis of bladder cancer. Methods: A systematic literature review, using the Medline database, was performed in July 2022 according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. All articles were required to satisfy the risk-of-bias assessment using the Joanna Briggs Institute Critical Assessment Tools. Data were collected based on miRNA expression, sample type, expression profiles, and accuracy. Results: The initial search retrieved 437 studies, 21 of which were included in the final analysis. Most studies on miRNA expression in human fluids used urine samples for analysis. Conclusion: There is a trend to cluster the expressed miRNAs to build diagnostic panels or use them in association with other diagnostic methods to achieve reasonable accuracy. Prospero database registration: (https://www.crd.york.ac.uk/prospero/) under ID CRD42022351686. Objective noncoding non coding biofluids noninvasive invasive Methods 202 MetaAnalyses Meta Analyses guidelines riskofbias risk bias Tools type profiles accuracy Results 43 2 analysis Conclusion registration https//www.crd.york.ac.uk/prospero/ httpswwwcrdyorkacukprospero https //www.crd.york.ac.uk/prospero/ www crd york ac uk prospero (https://www.crd.york.ac.uk/prospero/ CRD42022351686 CRD 20 4 https//www.crd.york.ac.uk/prospero wwwcrdyorkacukprospero //www.crd.york.ac.uk/prospero (https://www.crd.york.ac.uk/prospero CRD4202235168 CRD420223516 CRD42022351 CRD4202235 CRD420223 CRD42022 CRD4202 CRD420 CRD42 CRD4

ABSTRACT Plant species occurring in the Caatinga biome, when subjected to different water fluctuations, may have their morphophysiological and metabolic performance altered. Depending on the level of stress, the production of quality seedlings is affected. Therefore, the objective of this study was to evaluate the responses to different water availability levels in the morphophysiological and biochemical development of Croton blanchetianus Baill. The experiment was carried out in a greenhouse, evaluating four water regimes: 25%, 50%, 75% and 100% of pot capacity, and conducted in a randomized block design, with a total 5 blocks. The variables analyzed were: branch height and branch diameter; leaf area, number of leaves, root volume; root dry mass, shoot dry mass, total dry mass and root/shoot ratio; relative water content, proline, total soluble proteins, malondialdehyde, hydrogen peroxide, and photo synthetic pigments (chlorophyll ɑ, chlorophyll b, and carotenoids). The species Croton blanchetianus Baill. shows drought tolerance mechanisms, demonstrated by the reductions of growth, leaf area, dry mass of seedlings and photo synthetic pigments. It adjusts osmotically with increments in the production of proline, which acts in osmoprotection when there is water deficit, and in the production of proteins under the lower and higher water regime. The species has full development of seedlings under water regimes between 75% and 80% and adapts to different water fluctuations. biome fluctuations altered stress affected Therefore Baill greenhouse 25 25% 50 50% 75 100 capacity design blocks were diameter area leaves volume rootshoot ratio content proline malondialdehyde peroxide ɑ b carotenoids. carotenoids . carotenoids) mechanisms growth deficit regime 80 2 7 10 8 1

RESUMO Espécies vegetais de ocorrência no bioma Caatinga quando submetidas a diferentes flutuações hídricas podem ter seu desempenho morfofisiológico e metabólico alterado. A depender do nível de estresse, a produção de mudas de qualidade é afetada. Logo, objetivou-se avaliar as respostas às diferentes disponibilidades hídricas no desenvolvimento morfofisiológico e bioquímico de Croton blanchetianus Baill. O experimento foi desenvolvido em casa de vegetação e foram avaliados quatro regimes hídricos: 25%, 50%, 75% e 100% da capacidade de vaso e conduzido em delineamento experimental em blocos ao acaso, totalizando 5 blocos. As variáveis analisadas foram: altura e diâmetro dos ramos; área foliar, número de folhas, volume radicular; massa seca da raiz, parte aérea, total e relação raiz/parte aérea; teor relativo de água, prolina, proteínas solúveis totais, malondialdeído, peróxido de hidrogênio e pigmentos fotossintéticos (clorofila ɑ, clorofila b e carotenóides). A espécie Croton blanchetianus Baill. apresenta mecanismos de tolerância à seca, demonstrados pela redução de crescimento, área foliar, massa seca das mudas e da redução dos pigmentos fotossintéticos. Se ajusta osmoticamente com aumento na produção de prolina que atua na osmoproteção quando há déficit hídrico e, aumentando a produção de proteínas no menor e maior regime hídrico. A espécie apresenta pleno desenvolvimento de mudas nos regimes hídricos entre 75% e 80% e se adapta as diferentes flutuações hídricas. alterado estresse afetada Logo objetivouse objetivou Baill 25 25% 50 50% 75 100 acaso ramos foliar folhas radicular raiz aérea raizparte água totais malondialdeído ɑ carotenóides. carotenóides . carotenóides) crescimento 80 2 7 10 8 1

RESUMO Efluentes salinos da piscicultura em atividades agrícolas vem crescendo, sobretudo nas regiões semiáridas. Neste sentido, objetivou-se avaliar o efluente salino de piscicultura na irrigação de Croton blanchetianus verificando as respostas fisiológicas e bioquímicas. Após o estabelecimento das plantas oriundas de estacas, iniciou-se a irrigação com o efluente, diferenciando-se os tratamentos por quatro níveis de salinidade (controle, 1,5, 2,5 e 3,5 dS m-1). O tratamento controle foi representado pela água de abastecimento (0,56 dS m-1). As variáveis avaliadas foram: crescimento, teor relativo de água, biomassa seca, níveis de proteínas, prolina, peróxido de hidrogênio, malondialdeído e os pigmentos fotossintéticos. Os ajustes fisiológicos e bioquímicos garantiram a manutenção do teor relativo de água e ajuste osmótico em meio à condição salina, sem incremento da peroxidação lipídica. Os níveis de salinidade não afetaram C. blanchetianus, indicando que não houve estresse salino, pois, os efluentes da piscicultura são ricos em matéria orgânica, proveniente da alimentação e excrementos, beneficiado o desenvolvimento da espécie. O reuso do efluente salino de piscicultura na irrigação de C. blanchetianus pode ser uma alternativa ambiental viável, evitando-se o descarte diretamente no ambiente.

ABSTRACT The use of saline effluents from fish farming in agricultural activities has been increasing, especially in semiarid regions. This study was to evaluate the use of saline effluents from fish farming for the irrigation of Croton blanchetianus and to analyze the physiological and biochemical responses. After the cuttings were planted, irrigation with the effluent began. Treatments included four salinity levels (control, 1.5, 2.5, 3.5 dS m-1). The control treatment was the supply water (0.56 dS m-1). The evaluated variables were growth, relative water content, dry biomass, and levels of proteins, proline, hydrogen peroxide, malondialdehyde, and photosynthetic pigments. Physiological and biochemical adjustments ensured the maintenance of relative water content and osmotic adjustment under saline conditions without increasing lipid peroxidation. The salinity levels did not affect C. blanchetianus, indicating the lack of saline stress. The fish farm effluents are rich in organic matter, from food, and excrement, which was beneficial for the development of C. blanchetianus. The reuse of saline effluents from fish farming for the irrigation of C. blanchetianus can be a viable environmental alternative, avoiding direct disposal into the environment.

Resumo Toda atividade que atua envolvendo a exploração de recursos naturais, como a pesca, precisa ser organizada e conduzida com base nas informações dos programas de monitoramento para permitir uma avaliação contínua. Com o aumento da pressão pesqueira no Brasil, o entendimento da importância dos programas de monitoramento da pesca e como eles podem informar e auxiliar na tomada de decisões de conservação permanece limitado. Com base na literatura sobre pesca e conservação participativa, chamamos a atenção para a necessidade de gerar informações sobre o setor pesqueiro nacional para melhorar a pesca no país. Dado o contexto da necessidade de gerar informações sobre os estoques pesqueiros em exploração, bem como identificar potenciais alternativas de pesca e realizar diversas análises setoriais em conformidade com a Agenda 2030 para o Desenvolvimento Sustentável, é apresentada e discutida no presente trabalho a falta de um sistema de monitoramento contínuo da pesca no Brasil e seus efeitos na sustentabilidade da pesca no país. naturais contínua limitado participativa país 203 Sustentável 20 2

Abstract Every activity that involves exploitation of natural resources, such as fishing, needs to be organized and conducted based on information from monitoring programs to allow continuous evaluation. With the increasing fishing pressure in Brazil, the understanding of the importance of fisheries monitoring programs and how they can inform and assist in conservation decision-making remains limited. Based on the literature on fisheries and participatory conservation, we call attention to the need to generate information on the national fisheries sector in order to improve fisheries in the country. Given the context of the need to generate information on fishing stocks under exploitation, as well as to identify potential alternative fisheries and carry out various sectoral analyses in compliance with the 2030 Agenda for Sustainable Development, we present and discuss in the present paper the lack of a system of continuous fishing monitoring in Brazil and its effects on the fisheries sustainability in the country. resources evaluation decisionmaking decision making limited country 203 Development 20 2

Resumo Descrevemos o desenvolvimento inicial de Myloplus asterias e M. lobatus, duas espécies de peixes da família Serrasalmidae usando características morfológicas, merísticas e morfométricas. Esses serrasalmídeos herbívoros são fortemente pescados devido à sua importância comercial na Amazônia. Os indivíduos foram coletados entre 2016 e 2020 na zona limnética de águas abertas e em bancos de macrófitas na planície de inundação do baixo rio Amazonas. Testamos diferentes modelos de crescimento para identificar o padrão de desenvolvimento dessas espécies. Durante a ontogenia inicial, essas duas espécies podem ser diferenciadas pelo número total de miômeros; 37 a 39 em M. asterias vs. 40 a 41 em M. lobatus; pelo padrão de pigmentação e número de raios da nadadeira dorsal. Essas características são eficazes para distinguir essas espécies de outros serrasalmídeos. As relações morfométricas também foram diferentes entre as duas espécies, com distintos padrões de crescimento entre as características analisadas. Uma chave de identificação para larvas de algumas espécies simpátricas de Serrasalmidae da bacia amazônica é apresentada. Nossa expectativa é que este estudo contribua para o conhecimento da ontogenia inicial e da biologia das espécies de peixes da região Neotropical.

Abstract We described the early development of Myloplus asterias and M. lobatus, two fish species of the Serrasalmidae using morphological, meristic, and morphometric characteristics. These herbivores serrasalmids are heavily fished because of their commercial importance in the Amazon. The individuals were collected between 2016 and 2020 in the limnetic zone of open water and macrophyte stands in the Lower Amazon River floodplain. We tested different growth models to identify the development pattern of these species. During the initial ontogeny, these two species can be differentiated mainly by the myomeres total number, 37 to 39 in M. asterias vs. 40 to 41 in M. lobatus, the pigmentation pattern, and dorsal-fin ray numbers. These characteristics are effective in distinguishing these species from other serrasalmids. The morphometric relationships were also different between these two species, showing distinct patterns in growth between the analyzed features. An identification key for larvae of some sympatric Serrasalmidae species from the Amazon basin is presented. Our expectation is that this study will contribute to the knowledge of the initial ontogeny and the biology of fish species in the Neotropical region.

RESUMO Objetivo: Investigar a percepção da qualidade de vida das mães de crianças portadoras de síndrome congênita (microcefalia) associada ao Zika vírus. Métodos: Trata-se de um estudo qualitativo realizado em duas etapas. A primeira foi conduzida no Hospital Universitário Materno-Infantil e a segunda na Casa de Apoio Ninar, por meio de entrevista semiestruturada com mães de crianças que apresentam a síndrome congênita associada ao Zika vírus. A amostra foi composta por 10 mulheres. Resultados: Em consonância com a análise crítica do discurso, segundo os pressupostos de Fairclough, de 2008, quatro categorias emergiram: Qualidade de Vida e Saúde - a percepção da qualidade de vida está vinculada ao significado amplo do termo saúde; Redes de Qualidade de Vida e Atenção à Saúde - caracterizadas por precariedade e fragmentação do cuidado; Qualidade de Vida e Tempo Livre - falta de tempo livre para realizar atividades da vida diária e lazer; Qualidade de Vida e Perspectivas Futuras - foi abordada a falta de perspectiva futura, uma vez que a maioria das participantes teve que parar de trabalhar e estudar para cuidar dos filhos. Conclusões: Mães de crianças com síndrome congênita associada ao vírus Zika são totalmente dedicadas ao cuidado de seus filhos. A falta de perspectivas para o futuro foi considerada em decorrência da falta de tempo para lazer e atividade da vida diária.

ABSTRACT Objective: To investigate how mothers of children with congenital syndrome (microcephaly) associated with Zika virus perceive their quality of life. Methods: This is a qualitative study carried out in two stages: at the Maternal and Child University Hospital and at Casa de Apoio Ninar through semi-structured interviews with mothers of children with congenital syndrome associated with Zika virus. Ten women comprised the sample. Results: In line with the critical discourse analysis, four categories emerged based on Fairclough’s 2008 assumptions: Quality of Life and Health - quality of life perception associated with the broad meaning of the term health; Quality of Life and Health Care Systems - characterized by care instability and fragmentation; Quality of Life and Free Time - lack of free time for activities of daily living and leisure; Quality of Life and Future Perspectives - lack of future perspective, considering that most participants had to stop working and studying to take care of their children. Conclusions: Mothers of children with congenital syndrome associated with Zika virus are devoted to their children’s care. Their lack of prospects was considered a consequence of the lack of time for activities of daily living and leisure.

ABSTRACT This study presents 25 cases of recurrent respiratory papillomatosis (RRP) that occurred in Sao Luis, Maranhao State, Northeast region, Brazil, between January 2007 and December 2018. Sociodemographic and clinical profile of patients as well as human papillomavirus (HPV) infection status were evaluated. Clinical and histopathological data were collected from the patients’ medical records. For the HPV infection analysis, DNA was extracted and subjected to amplification by a nested polymerase chain reaction. Viral genotyping was performed by automated sequencing. The median age of patients was 12.40 ± 12.6. years, and the juvenile form of the disease (68%) was the predominant form of disease. Female participants were predominant (60%), and they were from cities located in the interior of the State (60%). The most common clinical manifestation was dysphonia; recurrence was observed in most cases (56%), and tracheostomy was necessary in seven patients (26.9%). When comparing the RRP forms, patients in the juvenile-RRP group had higher recurrence rates and need of tracheostomy than those in the adult-RRP group. The viral genotyping analysis revealed that 47.8% of patients had low-risk HPVs, whereas 13.1% had high-risk HPVs, and in 39.1% of patients the viral genotype was not obtained. HPV-6 was the most prevalent type and Juvenile-RRP was more prevalent in our population. HPV was present at a high rate, and HPV-6 was the predominant genotype. This study serves as the basis for further studies to be conducted in the Brazilian population. Our findings aid the better understanding of RRP, possibly suggesting some prognostic factors associated with the disease aggressiveness.

RESUMO Os requisitos nutricionais das espécies florestais nativas podem influenciar a produtividade. Assim, o entendimento desses requisitos nos permite otimizar o uso de insumos e reduzir os impactos ambientais em projetos de restauração florestal. O presente estudo teve como objetivo avaliar mudanças na ultraestrutura celular e na anatomia das lâminas foliares, bem como observar sinais visuais de deficiência de nutrientes em plantas jovens de Cariniana estrellensis (Raddi) Kuntze, uma espécie florestal amplamente utilizada em projetos de restauração ecológica. O experimento foi conduzido em casa de vegetação em blocos aleatórios com três repetições de sete tratamentos usando subtração de nutrientes (ou seja, controle [plantas cultivadas com todos os nutrientes], -N, -P, -K, -Ca, -Mg e -S). As plantas foram colhidas 135 dias após o início dos tratamentos, quando a deficiência de macronutrientes resultou em anormalidades visíveis. Foram observadas alterações na ultraestrutura celular e na estrutura dos cloroplastos, citoplasma e lamelas estromais, bem como concentrações de amido e lipídios no citoplasma, espaços intercelulares e células parenquimatosas. Alterações nas ultraestruturas celulares, lâminas foliares e sinais visuais de deficiência de nutrientes impediram o desenvolvimento de plantas jovens de C. estrellensis; portanto, projetos de restauração florestal que utilizam essa espécie em solos que requerem suplementação nutricional podem ter sucesso limitado na ausência de suporte nutricional.

ABSTRACT The nutritional requirements of native forest species can influence productivity. Thus, the understanding of these requirements enables us to optimize the use of inputs and reduce the environmental impacts inforest restoration projects. The present study aimed to evaluate changes in cellular ultrastructure and the anatomy of leaf laminae as well as observe visual signs of nutrient deficiency in young Cariniana estrellensis (Raddi) Kuntze plants, a forest species widely used in ecological restoration projects. The experiment was conducted in a greenhouse in random blocks with three replications of seven treatments using nutrient subtraction (I.e., control [plants grown with all nutrients], -N, -P, -K, -Ca, -Mg, and -S). The plants were harvested 135 days after the beginning of the treatments when the deficiency of the macronutrients resulted in visible abnormalities. Changes in the cell ultrastructure and structure of the chloroplasts, cytoplasm, and stromal lamellae were observed, as well as starch and lipid concentrations in the cytoplasm, intercellular spaces, and parenchymal cells. Changes in the cell ultrastructures, leaf laminae, and visual signs of nutrient deficiency hindered the development of young C. estrellensis plants; therefore, forest restoration projects that use this species in soils that require nutritional supplementation may have limited success in the absence of nutritional support.

RESUMO Pacus do gênero Myloplus representam um desafio taxonômico formidável, e particularmente o caso de M. asterias e M. rubripinnis, duas espécies amplamente distribuídas e comuns que abrigam uma considerável diversidade morfológica. Aplicamos aqui a tecnologia do DNA barcoding e múltiplos métodos de descoberta de espécies para encontrar possíveis espécies novas nesse grupo complexo. Registramos uma linhagem bem suportada que também é distinta morfológica e ecologicamente. Essa linhagem representa uma nova espécie que pode ser distinguida das demais congêneres por apresentar cromatóforos escuros nas escamas da linha lateral que conferem uma aparência de linha lateral preta. Ela pode ser adicionalmente diagnosticada por ter 25-29 raios ramificados na nadadeira dorsal (vs. 18-24), 89-114 escamas perfuradas do supracleitro até o final da placa hipural (vs. 56-89) e 98-120 escamas totais na linha lateral (vs. 59-97). A nova espécie é amplamente distribuída na bacia Amazônica, mas aparentemente possui preferência por habitats de água preta e clara. A preferência ecológica e o padrão de colorido escuro da linha lateral consistem em semelhanças impressionantes com o silver dólar recém descrito Metynnis melanogrammus.

ABSTRACT Pacus of the genus Myloplus represent a formidable taxonomic challenge, and particularly so for the case of M. asterias and M. rubripinnis, two widespread and common species that harbor considerable morphological diversity. Here we apply DNA barcoding and multiple species discovery methods to find candidate species in this complex group. We report on one well-supported lineage that is also morphologically and ecologically distinct. This lineage represents a new species that can be distinguished from congeners by the presence of dark chromatophores on lateral-line scales, which gives the appearance of a black lateral line. It can be further diagnosed by having 25-29 branched dorsal-fin rays (vs. 18-24), 89-114 perforated scales from the supracleithrum to the end of hypural plate (vs. 56-89), and 98-120 total lateral line scales (vs. 59-97). The new species is widely distributed in the Amazon basin, but seems to have a preference for black- and clearwater habitats. This ecological preference and black lateral line color pattern bears a striking similarity to the recently described silver dollar Metynnis melanogrammus.

RESUMO: Este estudo teve como objetivo avaliar mecanismos fisiológicos e bioquímicos de adaptação de Hyptis suaveolens submetidas ao estresse osmótico decorrente da salinidade inoculadas com espécies de fungos micorrízicos. Sementes de H. suaveolens foram colocadas para germinar em vasos de polietileno contendo substrato associado, ou não, a FMA. Após o estabelecimento das plantas, foram iniciados os tratamentos com diferentes concentrações de sais (0,0; 35; 70 e 105 mM) e fungos (controle e dois tipos de FMA), perfazendo 12 tratamentos com três repetições. O delineamento experimental foi em blocos casualizados em esquema fatorial 4 x 3, perfazendo 12 tratamentos com três repetições cada. Observou-se, através de variáveis fisiológicas e bioquímicas, que a salinidade afetou todas as variáveis analisadas e o estresse promoveu redução no conteúdo de matéria seca. Verificou-se que plantas associadas com FMA apresentaram ganho de matéria seca em relação as não associadas e incremento de respostas bioquímicas e fisiológicas das plantas colonizadas no tratamento 35mM de NaCl. No entanto, o estresse salino afeta negativamente o desenvolvimento de H. suaveolens não sendo observado, portanto, atenuação dos fungos.

ABSTRACT: The objective of this study was to evaluate the physiological and biochemical mechanisms of adaptation of Hyptis suaveolens under osmotic stress due to salinity inoculations with a mycorrhizal fungal species. H. suaveolens seeds were germinated in polyethylene pots containing a substrate associated with or without arbuscular mycorrhizal fungi (AMF). After plant formation, treatments were treated with different salt concentrations (0.0, 35, 70, and 105 mM) and fungi (control and two types of AMF), totaling 12 treatments with three replicates. The experimental design used randomized blocks in a 4 x 3 factorial scheme, totaling 12 treatments with three replicates each. Salinity affected all measured physiological and biochemical variables, and the stress reduced dry matter content. Plants associated with AMF had increased dry matter compared to non-associated plants, and there were increased biochemical and physiological responses of AMF-colonized plants in the 35 mM NaCl treatment. However, saline stress negatively affected the development of H. suaveolens; and therefore, no attenuation of fungi was observed.

RESUMO As relações entre o tamanho corporal do peixe e as medidas do otólito sagitta foram calculadas pela primeira vez para 15 espécies pertencentes a seis famílias de peixes demersais da costa norte do Brasil. Um total de 220 peixes foi amostrado da captura acidental realizada pelo arrasto de fundo da frota pesqueira industrial de camarão entre agosto e setembro de 2016. Todas as espécies apresentaram fortes relações entre as medidas do otólito e o comprimento total do peixe, com o coeficiente de determinação (r 2) variando entre 0,71 e 0,99. A variável mais fortemente relacionada ao comprimento total dos peixes foi o comprimento do otólito sagital (OL) com 98% da variabilidade. Essas relações representam uma ferramenta útil para estimar o comprimento e a massa de peixes predados a partir dos otólitos encontrados no conteúdo estomacal de predadores marinhos.

ABSTRACT The relationships between fish size and sagitta otolith measurements were calculated for the first time for 15 species belonging to six families from the northern Brazilian coast. A total of 220 fish were sampled from the bycatch landed by the bottom-trawl industrial shrimp-fishing fleet between August and September 2016. All species had strong relationships between otolith measurements and fish total length with the coefficient of determination (r 2) ranging between 0.71 and 0.99. The variable most strongly related to fish total length was found to be the sagittal otolith length (OL) with 98% of the variability. These relationships are a useful tool to estimate length and mass of preyed fish from otoliths found in stomach contents of marine predators.

Resumo O presente estudo fornece o primeiro registro de um isópode parasito (Artystone trysibia) em Caquetaia spectabilis, um ciclídeo da Amazônia coletado no estado do Amapá, norte do Brasil. Em maio de 2018, espécimes de C. spectabilis foram coletados no baixo Rio Jari e 33,3% estavam parasitados por A. trysibia dentro do orifício tegumentar localizado na região ventral, entre as nadadeiras pélvicas de C. spectabilis. Nenhuma hemorragia ou lesões foram observadas no tegumento dos hospedeiros. Este estudo amplia a distribuição de A. trysibia para a Amazônia oriental.

Abstract The present study provides the first record of an isopod parasite (Artystone trysibia) on Caquetaia spectabilis, a cichlid from the eastern Amazon collected in the State of Amapá, northern Brazil. In May 2018, specimens of C. spectabilis were collected in the lower Jari River, and 33.3% were parasitized by A. trysibia on the tegument tissue between pelvic fins. No hemorrhage or injury signals were observed in the tegument of the host. This study also expanded the distribution of A. trysibia to the eastern Amazon.