Embrapa Gado de Leite (CNPGL) https://www.alice.cnptia.embrapa.br/alice/handle/item/16 2026-06-12T03:21:49Z 2026-06-12T03:21:49Z NEVES, M. P. BIGNARDI, A. B. SOUZA, A. B. S. PEREIRA, R. J. PEIXOTO, M. G. C. D. BRUNELI, F. A. T. ANDRADE, R. G. COSTA, C. N. BRITO, L. F. SANTANA, M. L. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187356 2026-06-08T11:48:37Z 2026-01-01T00:00:00Z

Título: From satellites to the milking parlor: National Aeronautics and Space Administration prediction of worldwide energy resources as an information source for the national genetic evaluation of heat stress tolerance in Holstein and Gir cattle. Autoria: NEVES, M. P.; BIGNARDI, A. B.; SOUZA, A. B. S.; PEREIRA, R. J.; PEIXOTO, M. G. C. D.; BRUNELI, F. A. T.; ANDRADE, R. G.; COSTA, C. N.; BRITO, L. F.; SANTANA, M. L. Conteúdo: Heat stress is a major constraint to dairy productivity in tropical regions, where environmental conditions frequently exceed thermoneutral thresholds. The primary objective of this study was to quantify heat-related milk yield losses and estimate genetic parameters for thermotolerance in Brazilian Holstein and Gir cattle. In addition, because routine national genetic evaluations require complete and consistent environmental coverage, we evaluated the agreement between temperaturehumidity index (THI) values derived from the National Aeronautics and Space Administration (NASA) prediction of worldwide energy resources (POWER) and those obtained from ground-based weather stations to determine whether satellite-based data can serve as a reliable alternative environmental input. The phenotypic dataset included 2,161,001 first-lactation test-day milk yield (MY) records from 253,972 Holstein cows across 1,013 herds and 155,816 first-lactation records from 20,388 Gir cows across 316 herds. Three datasets were created by linking MY records to THI values derived from public weather stations (WS), NASA POWER (NASA), or both (NASAWS), allowing direct comparisons of phenotypic and genetic inferences across data sources. Random regression models incorporating DIM and THI were used to estimate genetic parameters and breeding values for heat tolerance. Divergent estimates of MY decline were observed between ground- and satellite-based data, with maximum average losses ranging from −0.440 to −0.367 kg/d per THI unit in Gir and −1.562 to −0.522 kg/d in Holstein. For Holstein, a consistent heat stress threshold was detected at 67 THI units, while thresholds in Gir varied from 70 to 75.853 depending on the data source. In contrast, estimates of additive genetic variance, heritability, and genetic correlations were nearly identical across meteorological sources, and sire ranking showed high consistency. Posterior heritability means (95% high posterior density intervals) in Holstein were 0.230 (0.217–0.243) for WS and 0.231 (0.218–0.244) for NASAWS; in Gir, values were 0.231 (0.195–0.269) for WS and 0.229 (0.194–0.267) for NASAWS. The genetic correlation between intercept and slope was consistently negative in both breeds (ranging from −0.428 to −0.397 in Holstein and from −0.282 to −0.275), confirming the antagonism between general production level and thermotolerance. The use of NASA POWER enabled broader spatial and temporal coverage, improved genetic prediction accuracy, and facilitated the identification of heat stress thresholds and associated losses. These results support the adoption of NASA POWER as a reliable and scalable alternative for genetic evaluations of heat tolerance, especially in regions with limited ground-based meteorological infrastructure.

2026-01-01T00:00:00Z PEREIRA, M. C. ANHOLETO, L. A. ABREU, M. R. de CASTRO, K. N. de C. CANUTO, K. M. SOUZA, A. S. Q. de CAMARGO-MATHIAS, M. I. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187358 2026-06-08T12:48:35Z 2026-01-01T00:00:00Z

Título: Histopathological alterations in the synganglion of female Rhipicephalus linnaei ticks treated with essential oils of Egletes viscosa and Lippia schaueriana. Autoria: PEREIRA, M. C.; ANHOLETO, L. A.; ABREU, M. R. de; CASTRO, K. N. de C.; CANUTO, K. M.; SOUZA, A. S. Q. de; CAMARGO-MATHIAS, M. I. Conteúdo: The inappropriate use of synthetic chemical acaricides for tick management has contributed to the selection of acaricideresistant tick strains, thereby stimulating the search for alternative and effective tick control strategies. Among these, the use of essential oils (EOs) derived from plants such as Egletes viscosa Less. (Asteraceae) and Lippia schaueriana Mart. (Verbenaceae) have shown promise in the control of insects and other arthropods. This study aimed to evaluate the effects of E. viscosa and L. schaueriana EOs on the morphohistology of the tick central nervous system (synganglion)—in Rhipicephalus linnaei semi-engorged females. The morphological alterations in the synganglion were assessed using histopathological and semi-quantitative analyses. The EOs, extracted via hydrodistillation and analyzed by gas chromatography-mass spectrometry (GC–MS), revealed 27 constituents in E. viscosa and 18 in L. schaueriana, with cis-isopinocarveol acetate and piperitenone oxide identified as the predominant compounds, respectively. Histological and semi-quantitative analyses of the synganglion in EO-exposed females revealed dose-dependent alterations that were more severe than the mild vacuolization observed in the ethanol control group, primarily characterized by disruptions in the external membrane structures (neurilemma and perineurium), degeneration of the cortical region with hypertrophic, pyknotic, and fragmented neuronal nuclei, cytoplasmic vacuolization, and neuropil fiber disorganization. These findings suggest that the essential oils of E. viscosa and L. schaueriana induce histopathological damage in the synganglion, including neuronal cell damage and potentially impairing other central nervous system-mediated functions, such as feeding and reproduction. This supports the potential of these oils as candidates for the development of novel plant-based acaricides.

2026-01-01T00:00:00Z COSTA, N. A. da S. SIQUEIRA, K. B. NALON, G. A. DUTRA, J. P. DESTRO, L. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187324 2026-06-06T12:56:59Z 2026-01-01T00:00:00Z

Título: Dairy consumption in food-based dietary guidelines: insights from the americas. Autoria: COSTA, N. A. da S.; SIQUEIRA, K. B.; NALON, G. A.; DUTRA, J. P.; DESTRO, L. Conteúdo: Milk and dairy products are widely recognized for their nutritional contributions, providing bioavailable calcium, protein, and micronutrients essential for human health, while also playing a significant socio-economic role in many countries. Food-Based Dietary Guidelines (FBDGs) serve as policy instruments to promote healthier dietary patterns, yet the way dairy is represented within them varies substantially across the Americas. This study aimed to analyze how dairy is addressed in national FBDGs across the region, identifying consistencies, gaps, and divergences. A descriptive and comparative documentary analysis was conducted using official national dietary guidelines published or endorsed by government institutions between April and May 2025. Guidelines were included if they contained explicit or implicit recommendations on milk and/or dairy consumption for healthy adults. To enable crosscountry comparisons, recommendations were standardized into milk equivalents (mL/day), with conversion factors applied for cheese and yogurt. Recommendations were then classified by type (quantitative or qualitative), intake volume, and subgroup-specific guidance. The analysis revealed marked heterogeneity. North American countries, particularly the United States and Canada, provided structured, quantitative recommendations of 600–800 mL/day, with subgroup-specific adjustments. Several Latin American countries, such as Argentina, Mexico, and Costa Rica, issued quantitative but less detailed guidance (400–600 mL/day). Conversely, many Central American and Caribbean countries included only qualitative statements or omitted dairy altogether. A notable finding was Brazil’s absence of quantitative dairy recommendations despite being the region’s largest producer and consumer, reflecting its guidelines’ emphasis on dietary patterns rather than food group servings. In conclusion, dairy-related recommendations in the Americas are fragmented, shaped by cultural traditions, policy priorities, and health concerns. While structured guidance can support nutrient adequacy, its absence may hinder public health goals. Regional dialogue and evidence-based, context-sensitive strategies are needed to strengthen dietary guidance, address inequalities, and ensure adequate nutrient intake across the continent.

2026-01-01T00:00:00Z LOPES, B. E. A. J. SIQUEIRA, K. B. MENDES, K. NOGUEIRA, T. DESTRO, L. https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187325 2026-06-06T12:57:00Z 2026-01-01T00:00:00Z

Título: Cognitive heuristics in consumers negative perceptions of dairy products in digital environments. Autoria: LOPES, B. E. A. J.; SIQUEIRA, K. B.; MENDES, K.; NOGUEIRA, T.; DESTRO, L. Conteúdo: Social media has become a privileged space for the circulation of information on various topics, exerting a growing influence on individual and collective perceptions. In this environment, users often resort to cognitive heuristics, i.e., mental shortcuts that simplify judgments and decisions, but which can also induce systematic biases. This study sought to identify and classify cognitive heuristics in digital discourse related to dairy products on platform X (formerly Twitter), based on a corpus of more than 400,000 negative posts collected and processed using Voyant Tools software. The methodology involved three steps: (i) selection of the most frequent words in a lexical cloud, (ii) investigation of contexts of use, and (iii) categorization of occurrences into thematic subgroups of economics, affect, anchoring, loss aversion, and availability. The results showed that dairy consumption is often associated with outrage over prices, emotional ties, and value frustrations. Everyday language has cognitive and emotional patterns that, although spontaneous, can induce distorted or biased perceptions on the part of consumers, negatively influencing their evaluation of products.

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