Loss of water quality in streams is an increasing problem in Uruguay, and dairy production stands out as one of most influential activities in diffuse nutrient losses (Failde et al., 2015). Santa Lucía river basin with a 13,681 km2 surface, has a high relevance to Uruguayan society because it is the main source of drinking water for metropolitan area of Montevideo, where 60% of country population lives.

ABSTRACT. Livestock production is being questioned for its greenhouse gas emissions. However, production systems influence multiple environmental variables and, in some cases, contribute to very valuable environmental services. This work summarizes information collected at 30 livestock production farms and four IN-IAs experimental fields allocated throughout the Uruguayan territory. A total of 231 bird species were recorded, 42 of them identified like priority conservation species. Of these species 10 are included in UICN lists and 19 in Uruguayan Red List.

ABSTRACT. Livestock production is being questioned for its greenhouse gas emissions. However, production systems influence multiple environmental variables and, in some cases, contribute to very valuable environmental services. This work summarizes information collected at 30 livestock production farms and four IN-IAs experimental fields allocated throughout the Uruguayan territory. A total of 231 bird species were recorded, 42 of them identified like priority conservation species. Of these species 10 are included in UICN lists and 19 in Uruguayan Red List.

Informe especial:Forestación en Uruguay. La visión y el aporte de INIA a un sector en crecimiento.

En Uruguay los apicultores denominan Mal del Río a la mortandad masiva de larvas que ocurre al final de primavera y comienzos del verano en colonias que se encuentran próximas a cursos de aguas con abundante vegetación ribereña. El principal síntoma de las colonias afectadas por este problema es la muerte de las larvas al poco tiempo de eclosionar del huevo. Los objetivos de este estudio fueron determinar la viabilidad de embriones y larvas en colonias afectadas por el Mal del Río e identificar el agente causal del problema.

ABSTRACT. This study reports the use of visible (vis) and near infrared (NIR) spectroscopy as a tool to classify honey samples from Uruguay, according to their floral origin. Classification models were developed using principal component analysis, discriminant partial least squares (DPLS) regression and linear discriminant analysis (LDA). Honey samples (n = 50) from two floral origins, namely Eucalyptus spp. and pasture, were split randomly into even calibration (n = 25) and validation sets (n = 25).

ABSTRACT. For more than 60 years, sporadic cases of massive summer honey bee larvae mortality in colonies located near freshwater systems with abundant riparian vegetation have been reported in Uruguay. This odd phenomenon, known as ?River disease? by beekeepers, can lead to colony death by depopulation. The aim of this study was to detect the causes of larvae death. Different experiments and analyses were performed using affected apiaries located between two important water courses.

ABSTRACT. Defining the composition and properties of manure in livestock production is critical in order to minimise possible environmental impacts stemming from its management. In this study, a nitrogen balance was carried out during two identical fattening periods (Experiments 1 and 2) in growing rabbits from weaning (age 28 d and live weight about 0.6 kg) to slaughter (age 61 d and live weight about 1.8 kg). The breeding conditions were typical for Spanish rabbit production.