RESUMEN En México, los matorrales ocupan el 29.7 % (576,747 km²) de la superficie del país. Estas áreas fungen como refugio de la avifauna. A pesar de su importancia, se desconoce la abundancia y composición avifaunística que pueden llegar a albergar, en específico, el matorral submontano. Los objetivos de este trabajo son: 1) describir la composición avifaunística del matorral submontano de la parte noroeste de Tamaulipas, México, en términos de riqueza, abundancia y diversidad, 2) analizar los gremios tróficos que se presentan en el matorral en función de la variación estacional y 3) conocer los estatus de conservación y endemismos de las especies de aves. Para ello, se realizaron 12 visitas mensuales de febrero de 2019 a enero de 2020, en las que se identificaron 1,858 individuos pertenecientes a 12 órdenes, 26 familias y 93 especies. Las familias de mayor riqueza fueron Cardinalidae y Parulidae. La estación del año más diversa fue la primavera (H’= 3.68). Se identificaron dos especies en peligro de extinción a nivel global y dos endemismos para México. Además, se reportan tres especies no registradas previamente en la región. El presente trabajo, es el primero que reporta la composición y riqueza de aves para la parte noroeste de Tamaulipas, México. Resalta la importancia del matorral submontano como refugio para las aves migratorias y residentes, y se contribuye al conocimiento de la diversidad regional.

ABSTRACT In Mexico, scrub habitat occupies 29.7 % (576,747 km²) of the country's surface. These areas serve as refuges for birds. However, despite their importance, the abundance and composition of birds are unknown, especially in the submontane scrub. The objectives of this work are: 1) to describe the avifaunal composition of the submontane scrub of the northwestern part of Tamaulipas, Mexico, in terms of richness, abundance, and diversity; 2) to analyze the trophic guilds that occur in the scrub as a function of seasonal variation; and 3) to determine the conservation status and endemism of bird species. For this, 12 monthly visits were made from February 2019 to January 2020, during which we identified 1,858 individuals belonging to 12 orders, 26 families, and 93 species. The richest families were Cardinalidae and Parulidae. While the most diverse season of the year was spring (H’= 3.68). Two globally endangered species and two endemic species were identified for Mexico. In addition, three species not previously recorded in the region are reported. This work is the first to report the composition and richness of birds for the northwestern part of Tamaulipas, Mexico. This highlights the importance of the submontane scrub as a refuge for migratory and resident birds. In addition, it contributes to the knowledge of regional diversity.

O hidrociclone é um equipamento amplamente utilizado pela indústria em processos envolvendo separação sólido-líquido, porém ainda pouco utilizado na agricultura irrigada no Brasil. Neste trabalho, avaliou-se o desempenho deste equipamento como pré-filtrante de partículas sólidas, oriundas dos processos erosivos e do assoreamento dos recursos hídricos. Os testes foram realizados com um hidrociclone de geometria "Rietema", possuindo diâmetro de 19,2 cm na parte cilíndrica, operando com vazões variando entre 10 m³ h-1 e 27 m³ h-1. Os materiais particulados usados em suspensão foram: solo franco-argiloso e areia de rio. Os resultados mostraram que a perda de carga máxima média foi de 52 kPa e 47 kPa para as suspensões aquosas de areia e solo, respectivamente. Seu melhor desempenho ocorreu operando com suspensão aquosa de areia, apresentando eficiência total de 92,3% para a vazão de 26,9 m³ h-1. Concluiu-se que o equipamento avaliado é mais eficiente para remoção de partículas de areia, podendo ser utilizado como pré-filtro em sistemas de irrigação.

The hydrocyclone is an equipment widely used by industry in cases involving solid-liquid separation, but still little used in irrigated agriculture in Brazil. This study evaluated the performance of this equipment as a pre-filter of solid particles, from erosive processes and the silting of water resources. The tests were performed with a hydrocyclone of "Rietema" geometry, with a diameter of 19.2 cm at the cylindrical part operating with outflows ranging between 10 m³ h-1 and 27 m³ h-1. The materials used in particulate suspension were clay loam soil and sand from river. The results showed that the average maximum head loss was 52 kPa and 47 kPa for aqueous suspensions of sand and soil, respectively. Its best performance occurred operating with slurry of sand, presenting total efficiency of 92.3% for 26.9 m³ h-1 of flow rate. It was concluded that such equipment is most effective to remove particles of sand, thus it can be used as a pre-filter in irrigation systems.

Introduction. Myasis is the parasitism of organs and tissues of warm-blooded vertebrates by the larvae of flies of different species. Case report. Thirteen year old female. Her house is provided with running water and sewer she had contact with farm house poultry. She began presenting symptoms 5 days prior to admission she presented with nasal discharge and pharyngitis. Her temperature was 38° C. At emergency services the patient was diagnosed with bacterial pharyngytis. Penicillin and clorfeniramine were administered. Three days later, larvae started coming out of her nose and mouth. In total 10 larvae were documented. In emergency services at a hospital, physical examination revealed pharyngeal erythema and rinorrhea. The larvae were described as yellowish, 10 mm long and 3 mm wide. The worms were sent to the Department of Parasitology of the School of Medicine of Puebla, Mexico, where they completed the in vitro cycle and were identified as Dermatobia hominis (fly), belonging to the Enterebridae family. In the hospital, 85 larvae were extracted from the patient. She discharged after 10 days of asymptomatic hospitalization. Conclusion. Myasis is not frequent and it can cause great tissue destruction. Antibiotic administration is generally not warranted unless there is evidence of concomitant superinfection.

Introducción. Miasis es la destrucción de tejidos de animales, incluido el hombre, por larvas de moscas. Caso clínico. Paciente femenino de 13 años de edad con antecedente de convivencia con aves de corral, que presentó, 5 días previos a su ingreso, temperatura de 38° C, dolor y prurito nasofaríngeo. En el servicio de urgencias se diagnosticó como rinofaringitis bacteriana, prescribiéndole penicilina procaínica y clorfeniramina. A los 3 días refirió salida de gusanos por boca y nariz en número de 10. A la exploración física se apreció faringe con hiperemia, saliendo por nariz y boca gusanos activamente móviles de color blancoamarillento, de 10 mm de longitud y 3 mm de ancho, en número de 20. Enviados a la Facultad de Medicina de Puebla, donde completaron ciclo biológico. La mosca obtenida fue Dermatobia hominis, familia Enterebridae. En el hospital se le practicó extracción de 85 larvas utilizando anestesia general e irrigación continua. Fue dada de alta 10 días después, asintomática. Conclusiones. La miasis es poco frecuente y puede ocasionar grandes destrucciones de tejido.