ABSTRACT. Abstract The unusual severity and return time of the 2005 and 2010 dry-season droughts in western Amazon is attributed partly to decadal climate fluctuations and a modest drying trend. Decadal variability of western Amazon hydroclimate is highly correlated to the Atlantic sea surface temperature (SST) north-south gradient (NSG). Shifts of dry and wet events frequencies are also related to the NSG phase, with a 66% chance of 3+ years of dry events per decade when NSG > 0 and 19% when NSG

Introducción. Capítulo I. Panorama mundial de las cadenas cárnicas:de las cadenas productivas a las cadenas de valor. Capítulo II. El caso de la cadena ovina en México. Capítulo III. El caso de la cadena cárnica ovina de Uruguay. Consideraciones finales. Referencias.

ABSTRACT. The ability to authenticate the feed given to animals has become a major challenge in animal production, where the diet fed to the animal is one of the most important production factors affecting the composition of milk and meat from cattle, sheep, and goats. Hence, there is currently an increased consumer demand for information on herbivore production factors and particularly the animal diet.

ABSTRACT A major bottleneck to Introgressive hybridization is the lack of genome collinearity between the donor (alien) genome and the recipient crop genome. Structural differences between the homeologs may create unbalanced segregation of chromosomes or cause linkage drag. To assess large-scale collinearity between potato and two of its wild relatives (Solanum commersonii and S. chacoense), we used BAC-FISH mapping of sequences with known positions on the RH potato map. BAC probes could successfully be hybridized to the S. commersonii and S.

Introducción. Comentario y consideraciones temáticas. Comentarios de visitas al campo experimental y productores. Tres días en la Universidad de Oregon. Consideraciones finales. Agradecimientos. Contacto con investigadores.

ABSTRACT. The ectoparasitic mite Varroa destructor is one of the main plagues of honey bees Apis mellifera. Grooming behavior is a resistance mechanism through which parasitized bees can dislodge mites by themselves (autogrooming) or by the action of other bees (allogrooming). The objective of this study was to evaluate grooming behavior in Italian (A. m. ligustica) and Africanized (hybrids of A. m. scutellata) bees at the individual, group, and colony levels. Firstly, five behaviors were recorded observing bees individually placed on a Petri dish and after placing a mite on their thorax.