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We present a flora and fauna dataset for the Mira-Mataje binational basins. This is an area shared between southwestern Colombia and northwestern Ecuador, where both the Chocó and Tropical Andes biodiversity hotspots converge. We systematized data from 120 sources in the Darwin Core Archive (DwC-A) standard and geospatial vector data format for geographic information systems (GIS) (shapefiles). Sources included natural history museums, published literature, and citizen science repositories across 13 countries. The resulting database has 33,460 records from 6,821 species, of which 540 have been recorded as endemic, and 612 as threatened. The diversity represented in the dataset is equivalent to 10% of the total plant species and 26% of the total terrestrial vertebrate species in both hotspots. The dataset can be used to estimate and compare biodiversity patterns with environmental parameters and provide value to ecosystems, ecoregions, and protected areas. The dataset is a baseline for future assessments of biodiversity in the face of environmental degradation, climate change, and accelerated extinction processes.

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BACKGROUND: The lips are the transition zone between the facial skin and the oral mucosa and are the site of alterations related to a broad spectrum of etiologies. Squamous cell carcinoma (SCC) and basal cell carcinoma (BCC) are the most prevalent neoplasms affecting lips. This study evaluated the demographic and clinicopathological features of the SCC and BCC in the lip. MATERIAL AND METHODS: A retrospective cross-sectional descriptive study (1994-2019) was carried out. Demographic and clinicopathologic data were collected from a hospital's dermatological service and an oncologic hospital. The data were submitted to descriptive analysis and Pearson's chi-square and Fisher's exact tests (p ≤ 0.05). RESULTS: 417 medical records were analyzed, of which 323 corresponded to SCC (77.5%) and 94 to BCC (22.5%). SCC showed more frequency in males (58.8%) and BCC in females (54.3%). The lower lip was significantly affected in male patients (p < 0.0001) and by both neoplasms (70.6% and 56.4%, respectively; p = 0.014). SCC and BCC were mainly treated with surgery (88.3% and 93.2%, respectively). Surgical margin was frequently negative in SCC and BCC (87%; 72.3%, respectively), and no recurrence was observed in 79.9% of SCC and 69.1% of BCC cases. CONCLUSIONS: SCC was more frequent in male patients, while BCC showed more frequency in female patients. Both neoplasms mainly affect the lower lip. Understanding the epidemiological profile of these lesions in the lip, as well as their etiology and clinical features, is fundamental for appropriate clinical conduct and the creation and/or amplification of preventive measures.

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RESUMO O objetivo foi descrever os níveis séricos de progesterona (P4) de éguas tratadas com um ou dois dispositivos intravaginais de primeiro uso e com um dispositivo de segundo uso de P4, em um período de 10 dias e comparar a concentração de P4. Três éguas foram tratadas com implante intravaginal de P4 (Reprosync®; 2g de P4) por 10 dias (D0 a D10). A égua 1 recebeu dois implantes novos, a égua 2 recebeu um implante novo e a égua 3 recebeu um implante usado de P4. Coletas de sangue foram realizadas diariamente (a.m./p.m.) do D0 ao D10 e concentrações de P4 foram analisadas por quimioluminescência. A égua que recebeu dois dispositivos apresentou numericamente maior concentração sérica média de P4 (5,11±2,24ng/mL) do que a égua que recebeu um dispositivo novo (3,27±0,94) e do que a égua que recebeu um dispositivo usado (2,78±0,72). As éguas que receberam um dispositivo (novo ou usado) tiveram médias de P4 relativamente semelhantes numericamente. Concluiu-se que a concentração sérica de P4 de éguas recebendo diferentes quantidades de dispositivos intravaginais de P4 parece diferir de acordo com o número de implantes inseridos. Ainda assim, todos os tratamentos atingiram concentrações séricas de P4 capazes de bloquear a ovulação.

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The clinical course of COVID-19 may show severe presentation, potentially involving dynamic cytokine storms and T cell lymphopenia, which are leading causes of death in patients with SARS-CoV-2 infection. Plasma exchange therapy (PLEX) effectively removes pro-inflammatory factors, modulating and restoring innate and adaptive immune responses. This clinical trial aimed to evaluate the impact of PLEX on the survival of patients with severe SARS-CoV-2 and the effect on the cytokine release syndrome. Hospitalized patients diagnosed with SARS-CoV-2 infection and cytokine storm syndrome were selected to receive 2 sessions of PLEX or standard therapy. Primary outcome was all-cause 60-days mortality; secondary outcome was requirement of mechanical ventilation, SOFA, NEWs-2 scores modification, reduction of pro-inflammatory biomarkers and hospitalization time. Twenty patients received PLEX were compared against 40 patients receiving standard therapy. PLEX reduced 60-days mortality (50% vs 20%; OR 0.25, 95%CI 0.071-0.880; p = 0.029), and this effect was independent from demographic variables and drug therapies used. PLEX significantly decreased SOFA, NEWs-2, pro-inflammatory mediators and increased lymphocyte count, accompanied with a trend to reduce affected lung volume, without effect on SatO2/FiO2 indicator or mechanical ventilation requirement. PLEX therapy provided significant benefits of pro-inflammatory clearance and reduction of 60-days mortality in selected patients with COVID-19, without significant adverse events.

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This study aimed to describe the epidemiological indexes of mastitis, milk quality and udder hygiene in the Compost Barn system, as well as to search for associations between isolated pathogens from milk with compost characteristics. Three dairy herds participated in the study, and the samples were collected during different periods on each farm. Individual milk samples were collected in duplicate for SCC analysis and microbiological culture. Environmental pathogens caused most cases of clinical mastitis on farm 2, and contagious pathogens caused the most cases on farm 1. Bed moisture was not associated with the incidence of environmental pathogens. Most of the animals remained in good udder hygiene during the study. Poor udder hygiene contributed to the increased incidence of environmental pathogens in one of the farms. A higher number of animals with a hygiene score of ≥ 2 were observed during the warmer and rainfall periods. There was no association between hygiene scores and somatic cell counts. The results suggest that pathogens isolated from milk in animals confined in Compost Barn under tropical climate are like other confinement systems adopted elsewhere. The year period influenced the udder hygiene score, reinforcing the importance of bed management throughout the year.

O objetivo deste estudo foi descrever os índices epidemiológicos da mastite, da qualidade do leite e da higiene do úbere em animais confinados no sistema Compost Barn, bem como buscar associações entre patógenos isolados do leite e características do composto. Três rebanhos leiteiros participaram do estudo e as amostras foram coletadas em diferentes períodos em cada fazenda. Amostras individuais de leite foram coletadas em duplicata para análise de CCS e cultura microbiológica. Patógenos ambientais causaram a maioria dos casos de mastite clínica na fazenda 2, e na fazenda 1 a maioria dos casos foi em decorrência de patógenos contagiosos. Amostras de material da cama foram coletadas em duas fazendas para análise da densidade bacteriana e da umidade. A umidade da cama permaneceu dentro da faixa de controle durante o estudo e não foi associada à incidência de patógenos ambientais. A maioria dos animais permaneceu com boa higiene de úbere durante o estudo. A falta de higiene do úbere contribuiu para o aumento da incidência de patógenos ambientais em uma das fazendas. Durante o período mais quente e mais chuvoso, um número maior de animais com escore de sujidade ≥2 foi observado em todos os rebanhos. Não houve associação entre escore de sujidade e contagem de células somáticas em qualquer uma das três fazendas. Os resultados indicam que o perfil de patógenos isolados do leite em animais confinados em Compost Barn sob clima tropical é semelhante a outros sistemas de confinamento adotados em outros lugares. O período do ano influenciou o escore de higiene do úbere, o que reforça a importância do manejo da cama ao longo do ano.

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Due to the supposed involvement of minerals in cases of ruminant periodontitis, this study aimed to analyze the concentrations of phosphorus (P) in bone, and cobalt (Co), copper (Co), iron (Fe), zinc (Zn) and selenium (Se) in liver of a cohort of sheep affected or not by periodontitis. From an outbreak of the disease in 2011 in Pará state, Brazil, rib and liver samples were obtained from 22 sheep with periodontitis and seven samples from healthy animals. Based on the concentrations of the different minerals in the tissues, we concluded that there was no relationship between periodontal disease in sheep with any mineral deficiency status. In contrast, most of the minerals in the tissues were above or within the recommended concentrations in bone and liver. Within the various aspects which until now have been studied regarding periodontitis in ruminants, the results obtained here corroborate the fact that periodontal disease in sheep is an infectious disease and it is not a consequence of the deficiency or excess of mineral elements in the diet.

Devido ao suposto envolvimento de minerais em casos de periodontite em ruminantes, este trabalho teve como objetivo analisar as concentrações de fósforo (P) nos ossos, além de cobalto (Co), cobre (Co), ferro (Fe), zinco (Zn) e selênio (Se), no fígado de ovelhas afetadas ou não por periodontite. De um surto da doença em 2011, no estado do Pará, Brasil, foram obtidas amostras de costelas e fígado de 22 ovelhas com periodontite e sete amostras de animais saudáveis. Com base nas concentrações dos diferentes minerais nos tecidos, conclui-se que não houve relação entre a doença periodontal em ovinos com qualquer estado de deficiência mineral. A maioria dos minerais estava acima ou dentro das concentrações recomendadas, seja no tecido ósseo, seja no hepático. Entre os diversos aspectos até agora estudados sobre a periodontite em ruminantes, os resultados obtidos corroboram o fato de a doença periodontal em ovinos ser uma doença infecciosa e não decorrente da deficiência ou do excesso de elementos minerais na dieta.

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The objective of this study was to investigate the effectiveness of the treatment of copper deficiency, by parenteral route, in buffalo calves raised on the Marajó Island (PA). Fourteen animals were divided into two groups. Group 1 received three doses of 120 mg of copper glycinate (20mgCu/mL), intramuscularly, on days 1, 45 and 90; in the group 2 (control) the animals were Not supplemented with copper. In both groups liver biopsies were performed on days 1 and 135. The diagnosis of copper deficiency was established through history, clinical signs, and by the analysis of hepatic copper content. In group 1, the mean hepatic copper content increased from 17.4±5.84mg/kgDM (before administration) to 311.2±133.5mg/kgDM (after 135 days) (P<0.05). In the control group, the mean of hepatic copper contents decreased from 17.1±3.4 to 9.11±1.1mg/kgDM at the end of the experiment (P<0.05). Based on the results, it was demonstrated that the administration of copper, by parenteral route, was efficient in the treatment of copper deficiency in buffalo calves and could become a very promising option for the reality of buffalo producers on the Island of Marajó.

A eficácia do tratamento da deficiência de cobre, por via parenteral, em bezerros bubalinos criados na Ilha de Marajó (PA), foi investigada em 14 animais, distribuídos em dois grupos. O grupo 1 recebeu três doses de 120mg de glicinato de cobre (20mgCu/mL), por via intramuscular, nos dias um, 45 e 90, e o grupo 2 (controle) foi formado por animais que não receberam o cobre, seja suplementado por via oral ou por via parenteral. Em ambos os grupos, foram realizadas biópsias hepáticas nos dias um e 135. O diagnóstico da deficiência de cobre foi estabelecido pelo histórico, pelos sinais clínicos e também pelos teores de cobre hepático. No grupo 1, a média do teor de cobre hepático aumentou de 17,4±5,84mg/kgMS (antes da administração) para 311,2±133,5mg/kgMS (após 135 dias) (P<0,05). Ao final do experimento (135 dias), nos animais do grupo controle, as médias dos teores de cobre diminuíram de 17,1±3,4 para 9,11±1,1mg/kgMS, (P<0,05). Diante dos dados, ficou demonstrado que a administração de cobre, por via parenteral, foi eficiente no tratamento da deficiência de cobre nos bezerros búfalos e pode se tornar uma opção muito promissora para a realidade dos criadores de búfalos da Ilha de Marajó.

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A canine patient, 13-year-old mixed breed male, 24kg, was seen at a private clinic in the city of Guayaquil, Ecuador. The main reason for consultation was the evaluation of a mass in the right knee and neck that had previously been cytologically diagnosed of neoplastic origin by another team of veterinarians through fine needle puncture and cytology. The contacts were asymptomatic. At the time of the consultation, a detailed exploration and complementary methods were performed that included hematological and urinary exams, mass cytology, serological test, chest radiography and biopsy for further histopathological study. The final diagnosis was a cutaneous granuloma due to microfilariae of Acanthocheilonema spp. and its subsequent surgical and medical treatment with excellent results. The canine heartworm is a cosmopolitan disease caused by nematodes of the genus Dirofilaria, with D. immitis being the best-known species. Less frequently, the species Acanthocheilonema spp., found in this patient, is also reported in Americas, with little knowledge about it. This is the first report of its kind hoping that it will serve as a basis for future studies.

Foi atendido, em uma clínica particular, na cidade de Guaiaquil, Equador, um paciente canino, sem raça definida, de 13 anos de idade, macho, não castrado, de 24kg. O motivo da consulta foi a avaliação de uma massa em região de articulação de joelho direito e de pescoço, que havia sido previamente diagnosticada como de origem neoplásica por outra equipe de médicos veterinários, mediante punção por agulha fina e citologia. Os contactantes eram assintomáticos. No momento da consulta, realizaram-se detalhadas avaliações clínica e complementar, que incluíram exames hematológicos, urinálise, citologia da massa, teste sorológico, radiografia torácica e biopsia para posterior estudo histopatológico. O diagnóstico final foi granuloma cutâneo por microfilária de Acanthocheilonema spp., para o qual os tratamentos clínico e cirúrgico apresentaram excelentes resultados. A dirofilariose é uma enfermidade cosmopolita causada por nematódeos do gênero Dirofilaria, sendo a espécie D. immitis a mais conhecida. Em menor frequência, a espécie Acanthocheilonema spp. encontrada neste paciente é também relatada na América, existindo pouco conhecimento a seu respeito. Este é o primeiro relato de caso sobre este tema e espera-se que sirva como base para futuros estudos.

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BACKGROUND: Atopic dermatitis (AD) is an itchy, chronic and inflammatory skin condition, with dysfunctional immune response and skin barrier defects. Reduction of filaggrin (FLG) and tight junctions (TJ) proteins, such as claudin-1 (CLDN-1), expression in cutaneous epithelial barrier is remarkable in AD pathogenesis. Ocular involvement occurs in approximately 40% of AD patients leading to changes in the structure of the conjunctiva. OBJECTIVES: We aimed to evaluate the expression of FLG and CLDN-1 in the ocular surface of adults with AD, analysing bulbar conjunctival cells collected by a novel non-invasive cellular imprint. METHODS: Bulbar conjunctival epithelial cells were collected by cellular imprint technique, and FLG and CLDN-1 expression were assessed by immunofluorescence (IF) and real-time polymerase chain reaction (RT-PCR). RESULTS: We detected increased expression of FLG and CLDN-1, as well as their transcript levels in AD patients compared with healthy controls (HC). There was a positive correlation between tear film break-up time (TBUT) and FLG expression. Fluorescein staining was inversely associated with FLG expression. CONCLUSIONS: Our results may reflect a reactive response of the ocular surface to AD-related ocular inflammation and associated dry eye disease. Further investigations focusing on the role of FLG and TJ expression in the ocular surface of AD patients may increment the understanding of the pathophysiology of extracutaneous AD and developing future targeted therapies.

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The aim of this case study was to evaluate the clinical and productive data of Nellore cows during pregnancy and lactation, supplemented or not with P. Ninety-five pregnant heifers were divided into two groups (G40 and G0). Until the date of calving animals from G40 received a mineral mixture composed of 224g of Na and 40g of P/kg, and G0 received only NaCl. After calving heifers were divided into four treatments: from G40, 28 first-calf cows continued to receive the mineral mixture containing 224g of Na and 40g of P/kg (group 40/40) and 12 started to receive only NaCl (group 40/0); from G0, 26 continued to receive only NaCl (group 0/0) and 15 started to receive a mixture containing 224g of Na and 40g of P/kg (group 0/40). In the second experimental phase, 205 multiparous cows were divided into two groups: G1 (40/40) consisting of 40 cows, receiving a mineral mixture containing 244g of Na and 40g/P per kg, during pregnancy and lactation, and group 2 (0/0) formed by 165 cows, which were supplemented only with NaCl. In both experiments, whether in pregnant or lactating breeders, there was not any sign of P deficiency or differences in calves LW at 120 and 210 days.

Este estudo avaliou os aspectos clínicos e produtivos de matrizes Nelore, suplementadas ou não com P. Noventa, e cinco nulíparas prenhes foram distribuídas em dois grupos (G40 e G0). Os animais do G40 receberam uma mistura mineral com 224g de Na e 40g de P/kg, até a data do parto, e o G0 recebeu apenas NaCl. Após o parto, as primíparas foram divididas em quatro grupos: do G40, 28 continuaram a receber mistura contendo 224g de Na e 40g de P/kg (grupo 40/40), e 12 passaram a receber apenas NaCl (grupo 40/0); do G0 26 continuaram recebendo apenas NaCl (grupo 0/0), e 15 passaram a ser suplementadas com a mistura contendo 224g de Na e 40g de P/kg (grupo 0/40). Na segunda fase experimental, 205 vacas foram divididas em dois grupos: G1 (40/40), composto por 40 vacas, suplementadas com a mistura mineral contendo 244g de Na e 40g de P/kg, durante a gestação e a lactação, e o G2 (0/0) foi formado por 165 vacas, as quais foram suplementadas apenas com NaCl, durante a gestação e a lactação. Em ambos os experimentos, seja nas matrizes em gestação ou naquelas em lactação, não houve qualquer sinal da deficiência de P, e isso se refletiu na ausência de diferenças nos pesos dos bezerros aos 120 e 210 dias.

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BACKGROUND: Quarantines may exacerbate the presence of emotional symptoms or anxiety. AIM: To explore the relation between time spent in lockdown and development of depressive and anxiety symptoms. MATERIAL AND METHODS: A survey including the GAD anxiety and PHQ-9 depression scores was answered online by 1,488 subjects aged 36 ± 14 years (74% women), invited to participate through social networks. Both scores are validated for the Chilean population. RESULTS: Most responders had a private health insurance system. Sixty seven percent had clinically significant depressive symptoms and 39% had anxiety symptoms. Spending four or more weeks of lockdown (quarantine) was associated with 1.6 times higher risk of developing depressive symptoms and 2.9 times higher risk of developing anxiety symptoms. Difficulties in access to health care increased 3.3 times the risk of developing depression. Suffering a respiratory disease increased 2.39 times the risk of developing anxiety. CONCLUSIONS: There was a direct association between depressive and anxious symptoms, and the time spent of quarantine.

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The objective of this study was to compare the reproductive efficiency of dairy buffaloes undergoing fixed-time artificial insemination (FTAI) protocols based on progesterone/estrogen (P4/E2) and eCG during unfavorable breeding season using cooled (CS) and frozen semen (FS). A total of 446 buffaloes (> 40 days postpartum) were randomly distributed into four blocks (years): B1-2014 (n = 143), B2-2015 (n = 34), B3-2016 (n = 90), and B4-2017 (n = 179). Each block was subdivided into two (AI with CS and FS using the same ejaculate of each bull). Thus, the block subdivision was as follows: B1 (CS = 71 and FS = 72); B2 (CS = 18 and FS = 16); B3 (CS = 47 and FS = 43); and B4 (CS = 90 and FS = 89). The ejaculates of eight Murrah bulls collected using an artificial vagina were divided into two aliquots: one aliquot was diluted in Botu-Bov® commercial extender and cooled (BB-CS), and the other was diluted in the same extender and frozen (BB-FS). BB-CS aliquots were cooled at 5 °C/24 h using a refrigerator. BB-FS group aliquots were also cooled, and after equilibrating at 5 °C for 4 h, were placed in a 21-L Styrofoam box, 5 cm above the surface of liquid nitrogen. In the afternoon (A) on D0 (2:00 p.m.) the animals received EB 2.0 mg IM (Estrogin®) and an ear implant (CRESTAR® 3.0 mg P4). At D9 (A), the implant was removed, and the animals received eCG 400 IU IM (Folligon® 5000) + Cloprostenol PGF2α 0.530 mg IM (Sincrocio®). At D10 (A), the animals received EB 1.0 mg IM (Estrogin®), and at D12 (8:00 a.m.), AI was performed. At D42, pregnancy was diagnosed via ultrasonography. Total CRs were 48.2% CS and 34.6% FS for years 2014 to 2017, with a significant difference of 13.7% (P<0.05). In conclusion, cooled semen resulted in higher CR than frozen semen in dairy buffaloes under the P4/E2 and eCG FTAI during the unfavorable reproductive season.(AU)

O objetivo deste estudo foi comparar a eficiência reprodutiva de búfalas leiteiras submetidas a protocolos de inseminação artificial em tempo fixo (IATF) à base de progesterona/estrogênio (P4/E2) e eCG, durante a estação reprodutiva desfavorável, usando-se sêmen resfriado (SR) e congelado (SC) Um total de 446 búfalas (> 40 dias após o parto) foi distribuído aleatoriamente em quatro blocos (anos): B1-2014 (n = 143), B2-2015 (n = 34), B3-2016 (n = 90) e B4-2017 (n = 179). Cada bloco foi subdividido em dois (IA com SR e SC utilizando-se a mesma ejaculação de cada touro). Assim, a subdivisão do bloco foi a seguinte: B1 (SR = 71 e SC = 72); B2 (SR = 18 e SC = 16); B3 (SR = 47 e SC = 43); e B4 (SR = 90 e SC = 89). Os ejaculados de oito touros Murrah coletados com vagina artificial foram divididos em duas alíquotas: uma alíquota diluída em diluente comercial Botu-Bov® e resfriada (BB-SR), e a outra diluída no mesmo diluente e congelada (BB-SC). As alíquotas de BB-SR foram resfriados a 5°C/24h usando-se um refrigerador. As alíquotas do grupo BB-SC também foram resfriadas e, após equilíbrio a 5°C por 4h, foram colocadas em uma caixa de isopor de 21L, 5 cm acima da superfície do nitrogênio líquido. À tarde (A), no D0 (14h), os animais receberam BE 2,0 mg IM (Estrogin®) e um implante auricular (Crestar® 3,0 mg P4). No D9 (A), o implante foi retirado e os animais receberam eCG 400 UI IM (Folligon® 5000) + cloprostenol PGF2α 0,530 mg IM (Sincrocio®). No D10 (A), os animais receberam BE 1,0mg IM (Estrogin®), e, no D12 (8h da manhã), foram realizadas as IAs. No D42, a gestação foi diagnosticada por ultrassonografia. As taxas de concepção (TC) totais foram 48,2% SR e 34,6% SC para os anos de 2014 a 2017, com uma diferença significativa de 13,7% (P<0,05). Em conclusão, o sêmen resfriado resultou em maior TC do que o sêmen congelado em bubalinos leiteiros sob P4/E2 e eCG FTAI durante a estação reprodutiva desfavorável.(AU)

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BACKGROUND: Quarantines may exacerbate the presence of emotional symptoms or anxiety. AIM: To explore the relation between time spent in lockdown and development of depressive and anxiety symptoms. MATERIAL AND METHODS: A survey including the GAD anxiety and PHQ-9 depression scores was answered online by 1,488 subjects aged 36 ± 14 years (74% women), invited to participate through social networks. Both scores are validated for the Chilean population. RESULTS: Most responders had a private health insurance system. Sixty seven percent had clinically significant depressive symptoms and 39% had anxiety symptoms. Spending four or more weeks of lockdown (quarantine) was associated with 1.6 times higher risk of developing depressive symptoms and 2.9 times higher risk of developing anxiety symptoms. Difficulties in access to health care increased 3.3 times the risk of developing depression. Suffering a respiratory disease increased 2.39 times the risk of developing anxiety. CONCLUSIONS: There was a direct association between depressive and anxious symptoms, and the time spent of quarantine.

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Currently, we are facing many ecosystem changes derived from years of anthropogenic disturbances. Habitat simplification stands out among human-derived impacts, due to its detrimental effects on vegetation structure and associated biota. Here, we assessed the effects of litter disturbance and forest simplification on a tropical ground-foraging ant community. To do that, we tested whether ant richness will be negatively affected by litter disturbance and habitat simplification. Additionally, we tested whether litter disturbance affects the time of resource discovery and dominance, and if so, whether its effects are intensified by forest simplification. This study occurred at Rio Doce State Park, a preserved area of Atlantic Forest in Southeastern Brazil. We experimentally simulated litter disturbance by removing the leaf litter and superficial soil layer in a mahogany monoculture forest and preserved Atlantic Forest. We sampled ants using paired-mixed baits of protein and carbohydrate in 12 points, half of them in each forest type. As expected, we found higher richness in the preserved and non-disturbed forest. Moreover, resource discovery was faster in disturbed monoculture, but bait dominance was higher in the undisturbed preserved forest. Litter heterogeneity seems to play an important role in determining ant dispersion and intra-specific communication, as we observed that litter disturbance impacts were strengthened by forest simplification. Our results highlight the efficiency of ground-foraging ants as bioindicators of disturbance and habitat quality. Moreover, our study indicates how distinct types of disturbances can act synergistically, changing the assembly of associated biota.

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This study investigated in vitro the efficacy of four different extenders (TES-TRIS and TRIS with LDL low-density lipoprotein at concentrations of 10 or 5%) on the longevity of buffalo sperm in the refrigeration process at 5ºC. Sperm motility was assessed every 24 hours up to 72 hours of incubation using computer assisted sperm analysis and sperm membrane integrity was examined by the hypoosmotic test (HOST) at T1, T24, T48 and T72 hours. Eleven buffaloes (1 ejaculate per buffalo) of the Murrah breed were used, ranging in age from 4 to 5 years. Immediately after collection, each ejaculate was fractionated into 4 aliquots, and each aliquot was diluted in one of four diluents to obtain 50x106SPTZ/mL. The samples were packed in 0.5mL straws and refrigerated (-0.25°C/min) to 5°C and maintained at this temperature until evaluation. Prior to evaluation the samples were heated at 37°C for 30 seconds. The statistical package used for analysis was STATA 12.0 "Statistical Analysis Software" and means were compared by the Friedman test (P<0.05). The results of sperm kinetics and HOST indicate that the TRIS diluent with 10% LDL could be a promising alternative for semen refrigeration at 5ºC, to be used in conventional and fixed time artificial insemination.(AU)

Este estudo investigou in vitro a eficácia de quatro diferentes extensores (TES-TRIS e TRIS com lipoproteína de baixa densidade - LDL, nas concentrações de 10 ou 5%) sobre a longevidade espermática de búfalos no processo de refrigeração a 5ºC. A motilidade espermática foi avaliada a cada 24 horas até 72 horas de incubação, por sistema computadorizado "CASA", e a integridade de membrana espermática foi examinada pelo teste hiposmótico (HOST) em T1, T24, T48 e T72 horas. Foram utilizados 11 búfalos (um ejaculado por búfalo) da raça Murrah, com idade variando de quatro a cinco anos. Imediatamente após a coleta, cada ejaculado foi fracionado em quatro alíquotas, e cada alíquota foi diluída em um dos quatro diluidores para a obtenção de 50x106 SPTZ/mL. As amostras foram envasadas em palhetas de 0,5 mL, refrigeradas (-0,25oC/minuto) até 5oC e mantidas nessa temperatura até a avaliação. Previamente à avaliação, as amostras foram aquecidas a 37oC por 30 segundos. O pacote estatístico utilizado para as análises foi o STATA 12.0 "Statistical Analysis Software", e as médias foram comparadas pelo teste de Friedman (P<0,05). Os resultados de cinética e HOST até o tempo de 48 horas indicam que o diluidor TRIS com 10% LDL seria uma alternativa promissora para a refrigeração do sêmen a 5ºC, a ser utilizado na inseminação artificial e na inseminação artificial em tempo fixo.(AU)

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This study investigated in vitro the efficacy of four different extenders (TES-TRIS and TRIS with LDL low-density lipoprotein at concentrations of 10 or 5%) on the longevity of buffalo sperm in the refrigeration process at 5ºC. Sperm motility was assessed every 24 hours up to 72 hours of incubation using computer assisted sperm analysis and sperm membrane integrity was examined by the hypoosmotic test (HOST) at T1, T24, T48 and T72 hours. Eleven buffaloes (1 ejaculate per buffalo) of the Murrah breed were used, ranging in age from 4 to 5 years. Immediately after collection, each ejaculate was fractionated into 4 aliquots, and each aliquot was diluted in one of four diluents to obtain 50x106SPTZ/mL. The samples were packed in 0.5mL straws and refrigerated (-0.25°C/min) to 5°C and maintained at this temperature until evaluation. Prior to evaluation the samples were heated at 37°C for 30 seconds. The statistical package used for analysis was STATA 12.0 "Statistical Analysis Software" and means were compared by the Friedman test (P<0.05). The results of sperm kinetics and HOST indicate that the TRIS diluent with 10% LDL could be a promising alternative for semen refrigeration at 5ºC, to be used in conventional and fixed time artificial insemination.(AU)

Este estudo investigou in vitro a eficácia de quatro diferentes extensores (TES-TRIS e TRIS com lipoproteína de baixa densidade - LDL, nas concentrações de 10 ou 5%) sobre a longevidade espermática de búfalos no processo de refrigeração a 5ºC. A motilidade espermática foi avaliada a cada 24 horas até 72 horas de incubação, por sistema computadorizado "CASA", e a integridade de membrana espermática foi examinada pelo teste hiposmótico (HOST) em T1, T24, T48 e T72 horas. Foram utilizados 11 búfalos (um ejaculado por búfalo) da raça Murrah, com idade variando de quatro a cinco anos. Imediatamente após a coleta, cada ejaculado foi fracionado em quatro alíquotas, e cada alíquota foi diluída em um dos quatro diluidores para a obtenção de 50x106 SPTZ/mL. As amostras foram envasadas em palhetas de 0,5 mL, refrigeradas (-0,25oC/minuto) até 5oC e mantidas nessa temperatura até a avaliação. Previamente à avaliação, as amostras foram aquecidas a 37oC por 30 segundos. O pacote estatístico utilizado para as análises foi o STATA 12.0 "Statistical Analysis Software", e as médias foram comparadas pelo teste de Friedman (P<0,05). Os resultados de cinética e HOST até o tempo de 48 horas indicam que o diluidor TRIS com 10% LDL seria uma alternativa promissora para a refrigeração do sêmen a 5ºC, a ser utilizado na inseminação artificial e na inseminação artificial em tempo fixo.(AU)

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RESUMO

Milk production is an important economic and social activity in Brazil. Failure to meet institutional and market demands for quality and sustainability has led farmers, particularly small-scale farmers, to leave agriculture. The aim of this study was to assess and compare the sustainability of dairy farms in Paraná, Brazil. A semi-structured questionnaire was administered to 75 dairy farm operators. Sustainability indicators were generated on the basis of economic, environmental and social data using exploratory factor analysis. Factor scores were subjected to hierarchical clustering, which resulted in the formation of three groups of dairy farms. Groups 1, 2 and 3 had high, intermediate and low levels of sustainability, respectively. Group 1 comprised large-scale dairy farms with high productivity. Dairy farms with intermediate sustainability (group 2) had medium production capacity, and farms with low sustainability (group 1) had the smallest production scale and capacity. Large-scale dairy farms have greater economic, environmental and social sustainability and are, therefore, more likely to survive in the medium and long term.

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