Efecto del número de inseminaciones y de la GnRH sobre la preñez en vaquillonas Angus sincronizadas con tiaprost

Los objetivos del trabajo fueron evaluar el efecto del número de inseminaciones (inseminación artificial a tiempo fijo: IATF, 2 vs. 1) en vaquillonas sincronizadas con dos inyecciones de un agente luteolítico PGF (tiaprost) separadas por 12 días y comprobar si la administración de GnRH al realizar una IATF permite obtener resultados de preñez equivalentes a dos IATF. Se realizaron tres réplicas del ensayo, utilizando 98 vaquillonas Angus (edad: 18–24 meses; condición corporal: 7,2±0,4 – escala 1 a 9). Las vaquillonas fueron distribuidas aleatoriamente dentro de cada repetición. 1) Grupo PGF2IATF: en los días 0 y 12 se administraron 750 μg de tiaprost, realizando IATF a las 72 y 96 h post PGF. 2) Grupo PGFGnRHIATF: ídem grupo PGF2IATF, realizando una IATF a las 72 h y administración de 8 μg de buserelina. 3) Grupo PGFIATF: similar al grupo anterior, pero sin buserelina. Para la IATF se utilizó semen congelado / descongelado, provenientede un toro de probada fertilidad. El diagnóstico de gestación se realizó por palpacióntransrrectal a los 90 días post IATF. El análisis estadístico se realizó con el auxilio del SAS, sin observar efecto de la repetición (p>0,05). Los animales del grupo PGFIATF se preñaron en menor proporción que los inseminados a las 72 y 96 horas (46,9 vs. 76,5%, respectivamente). El grupo que incluyó buserelina (GnRH) no mostró diferencias con los otros grupos(59,4%, p>0,05). Se concluye que en vaquillonas Angus sincronizadas con dos inyecciones de PGF separadas por 12 días, la implementación de una IATF realizada a las 72 horas post tratamiento disminuye el porcentaje de preñez comparado con dos IATF a las 72 y 96 horas. El uso de GnRH evita tal disminución, circunstancia que debería ser confirmada sobre un mayor número de animales

Unforeseen plant phenotypic diversity in a dry and grazed world

23 páginas..- 4 figuras y 7 figuras.- 50 referencias y 90 referenciasEarth harbours an extraordinary plant phenotypic diversity1 that is at risk from ongoing global changes2,3. However, it remains unknown how increasing aridity and livestock grazing pressure—two major drivers of global change4,5,6—shape the trait covariation that underlies plant phenotypic diversity1,7. Here we assessed how covariation among 20 chemical and morphological traits responds to aridity and grazing pressure within global drylands. Our analysis involved 133,769 trait measurements spanning 1,347 observations of 301 perennial plant species surveyed across 326 plots from 6 continents. Crossing an aridity threshold of approximately 0.7 (close to the transition between semi-arid and arid zones) led to an unexpected 88% increase in trait diversity. This threshold appeared in the presence of grazers, and moved toward lower aridity levels with increasing grazing pressure. Moreover, 57% of observed trait diversity occurred only in the most arid and grazed drylands, highlighting the phenotypic uniqueness of these extreme environments. Our work indicates that drylands act as a global reservoir of plant phenotypic diversity and challenge the pervasive view that harsh environmental conditions reduce plant trait diversity8,9,10. They also highlight that many alternative strategies may enable plants to cope with increases in environmental stress induced by climate change and land-use intensification.This research was funded by the European Research Council (ERC Grant agreement 647038 1004 [BIODESERT]) and Generalitat Valenciana (CIDEGENT/2018/041). N.G. was supported by CAP 20–25 (16-IDEX-0001) and the AgreenSkills+ fellowship programme which has received funding from the European Union’s Seventh Framework Programme under grant agreement FP7-609398 (AgreenSkills+ contract). F.T.M. acknowledges support from the King Abdullah University of Science and Technology (KAUST), the KAUST Climate and Livability Initiative, the University of Alicante (UADIF22-74 and VIGROB22-350), the Spanish Ministry of Science and Innovation (PID2020-116578RB-I00), and the Synthesis Center (sDiv) of the German Centre for Integrative Biodiversity Research Halle–Jena–Leipzig (iDiv). Y.L.B.-P. was supported by a Marie Sklodowska-Curie Actions Individual Fellowship (MSCA-1018 IF) within the European Program Horizon 2020 (DRYFUN Project 656035). H.S. is supported by a María Zambrano fellowship funded by the Ministry of Universities and European Union-Next Generation plan. L.W. acknowledges support from the US National Science Foundation (EAR 1554894). G.M.W. acknowledges support from the Australian Research Council (DP210102593) and TERN. M.B is supported by a Ramón y Cajal grant from Spanish Ministry of Science (RYC2021-031797-I). L.v.d.B. and K.T. were supported by the German Research Foundation (DFG) Priority Program SPP-1803 (TI388/14-1). A.F. acknowledges the financial support from ANID PIA/BASAL FB210006 and Millenium Science Initiative Program NCN2021-050. A.J. was supported by the Bavarian Research Alliance for travel and field work (BayIntAn UBT 2017 61). A.L. and L.K. acknowledge support from the German Research Foundation, DFG (grant CRC TRR228) and German Federal Government for Science and Education, BMBF (grants 01LL1802C and 01LC1821A). B.B. and S.U. were supported by the Taylor Family-Asia Foundation Endowed Chair in Ecology and Conservation Biology. P.J.R. and A.J.M. acknowledge support from Fondo Europeo de Desarrollo Regional through the FEDER Andalucía operative programme, FEDER-UJA 1261180 project. E.M.-J. and C.P. acknowledge support from the Spanish Ministry of Science and Innovation (PID2020-116578RB-I00). D.J.E. was supported by the Hermon Slade Foundation. J.D. and A.Rodríguez acknowledge support from the FCT (2020.03670.CEECIND and SFRH/BDP/108913/2015, respectively), as well as from the MCTES, FSE, UE and the CFE (UIDB/04004/2021) research unit financed by FCT/MCTES through national funds (PIDDAC). S.C.R. acknowledges support from the US Department of Energy (DE-SC-0008168), US Department of Defense (RC18-1322), and the US Geological Survey Ecosystems Mission Area. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the US government. E.H.-S. acknowledges support from Mexican National Science and Technology Council (CONACYT PN 5036 and 319059). A.N. and C. Branquinho. acknowledge the support from FCT—Fundação para a Ciência e a Tecnologia (CEECIND/02453/2018/CP1534/CT0001, PTDC/ASP-SIL/7743/ 2020, UIDB/00329/2020), from AdaptForGrazing project (PRR-C05-i03-I-000035) and from LTsER Montado platform (LTER_EU_PT_001). Field work of G.P. and J.M.Z. was supported by UNRN (PI 40-C-873).Peer reviewe

Hacia una construcción colectiva de circuitos cortos de comercialización con organizaciones de la economía social del IDEVI (Dpto. Adolfo Alsina, Río Negro)

Fil: Liscovsky, Iris J. Universidad Nacional de Río Negro. Sede Atlántica; Argentina.Fil: Cabral, María C. Universidad Nacional de Río Negro. Sede Atlántica; Argentina.Fil: Contreras, Celeste S. Universidad Nacional de Río Negro. Sede Atlántica; Argentina.Fil: Fernández Mouján, Inés. Universidad Nacional de Río Negro. Sede Atlántica; Argentina.Fil: Sacchi, Emiliano. Universidad Nacional de Río Negro. Sede Atlántica; Argentina.Fil: Torres, Mercedes. Universidad Nacional de Río Negro. Sede Atlántica; Argentina.Fil: Vera, Jorge A. Universidad Nacional de Río Negro. Sede Atlántica; Argentina.Fil: Zeberio, Juan M. Universidad Nacional de Río Negro. Sede Atlántica; Argentina.Los videos que acompañan a este informe pueden verse en el enlace adjunto.La potencialidad productiva en manos de pequeños y medianos productores organizados en sistemas cooperativos y asentados en tierras bajo la gestión del Instituto de Desarrollo del Valle Inferior de Río Negro (IDEVI, Rio Negro) es alta. A pesar del contexto de fuertes potencialidades y de importancia regional reconocidos en la Ley provincial de Fomento de la Economía Social (aún sin Reglamento de Aplicación), el circuito de comercialización no beneficia a ninguno de sus extremos (productor-consumidor local). Los productores del IDEVI experimentan un bajo retorno económico y los consumidores de Viedma pagan altos costos de los productos alimenticios. Cuestiones urgentes de abordar, pues las tendencias indican que el incremento en la producción de alimentos no se corresponde con un aumento en el acceso a estos. Los miembros del equipo de investigación han abordado diversos trabajos y aproximaciones que involucran a los sectores regionales de la economía social. Entre ellos se encuentran la promoción de espacios que colaboran con la consolidación del sector, cuyo principal resultado es el formativo-colaborativo, a través de procesos de planificación estratégica o planeación participativa con las organizaciones de productores. Los estudios participativos con miembros de la Cooperativa Agropecuaria San Javier (IDEVI) permitieron diagnosticar elementos que inciden en los procesos de producción y de distribución del excedente, identificando vulnerabilidades, entre las que se considera prioritaria la comercialización. Este factor comenzó a trabajarse en 2015, llegando a identificar en los productores escasas capacidades de planeación para la comercialización, dada la diversidad y complejidad y el débil conocimiento de alternativas

Multidisciplinary consensus on the criteria for fertility preservation in cancer patients.

Infertility is one of the main sequelae of cancer and its treatment in both children and adults of reproductive age. It is, therefore, essential that oncologists and haematologists provide adequate information about the risk of infertility and the possibilities for its preservation before starting treatment. Although many international clinical guidelines address this issue, this document is the first Spanish multidisciplinary guideline in paediatric and adult oncological patients. Experts from the Spanish Society of Medical Oncology, the Spanish Fertility Society, the Spanish Society of Haematology and Haemotherapy, the Spanish Society of Paediatric Haematology and Oncology and the Spanish Society of Radiation Oncology have collaborated to develop a multidisciplinary consensus

Multidisciplinary consensus on the criteria for fertility preservation in cancer patients

Infertility is one of the main sequelae of cancer and its treatment in both children and adults of reproductive age. It is, therefore, essential that oncologists and haematologists provide adequate information about the risk of infertility and the possibilities for its preservation before starting treatment. Although many international clinical guidelines address this issue, this document is the first Spanish multidisciplinary guideline in paediatric and adult oncological patients. Experts from the Spanish Society of Medical Oncology, the Spanish Fertility Society, the Spanish Society of Haematology and Haemotherapy, the Spanish Society of Paediatric Haematology and Oncology and the Spanish Society of Radiation Oncology have collaborated to develop a multidisciplinary consensus

Unforeseen plant phenotypic diversity in a dry and grazed world

Abstract Earth harbours an extraordinary plant phenotypic diversity1 that is at risk from ongoing global changes2,3. However, it remains unknown how increasing aridity and livestock grazing pressure—two major drivers of global change4–6—shape the trait covariation that underlies plant phenotypic diversity1,7. Here we assessed how covariation among 20 chemical and morphological traits responds to aridity and grazing pressure within global drylands. Our analysis involved 133,769 trait measurements spanning 1,347 observations of 301 perennial plant species surveyed across 326 plots from 6 continents. Crossing an aridity threshold of approximately 0.7 (close to the transition between semi-arid and arid zones) led to an unexpected 88% increase in trait diversity. This threshold appeared in the presence of grazers, and moved toward lower aridity levels with increasing grazing pressure. Moreover, 57% of observed trait diversity occurred only in the most arid and grazed drylands, highlighting the phenotypic uniqueness of these extreme environments. Our work indicates that drylands act as a global reservoir of plant phenotypic diversity and challenge the pervasive view that harsh environmental conditions reduce plant trait diversity8–10. They also highlight that many alternative strategies may enable plants to cope with increases in environmental stress induced by climate change and land-use intensification

Vulnerability of mineral-associated soil organic carbon to climate across global drylands

DATA AVAILABILITY : The data associated with this study are publicly available via figshare (https://doi.org/10.6084/m9.figshare.24678891) (ref. 68).EXTENDED DATA : EXTENDED DATA FIG. 1. Locations of the 326 plots surveyed across global drylands. Locations are shown as red circles on a global aridity (1 – annual precipitation/potential evapotranspiration) map for drylands (areas with aridity > 0.35), on a less arid-to-more arid color scale. EXTENDED DATA FIG. 2. Effects of climate on particulate organic C (POC) and mineral-associated organic C (MAOC) in dryland soils with organic C contents below and above the median. EXTENDED DATA FIG. 3. Importance of climate, biotic factors, and soil biogeochemistry in random forest models of particulate organic carbon C (POC) and mineral-associated organic carbon C (MAOC) in global drylands. EXTENDED DATA FIG. 4. Effects of soil biogeochemistry on particulate organic C (POC) and mineral-associated organic C (MAOC) contents across global dryland soils. EXTENDED DATA TABLE 1. Summary statistics of the numeric predictors and covariates used to examine the response of particulate organic carbon (POC) and mineral-associated (MAOC) contents to climate across global drylands. EXTENDED DATA TABLE 2. Categorical covariates used to examine the response of particulate organic carbon (POC) and mineral-associated (MAOC) contents to climate in global drylands.Mineral-associated organic carbon (MAOC) constitutes a major fraction of global soil carbon and is assumed less sensitive to climate than particulate organic carbon (POC) due to protection by minerals. Despite its importance for long-term carbon storage, the response of MAOC to changing climates in drylands, which cover more than 40% of the global land area, remains unexplored. Here we assess topsoil organic carbon fractions across global drylands using a standardized field survey in 326 plots from 25 countries and 6 continents. We find that soil biogeochemistry explained the majority of variation in both MAOC and POC. Both carbon fractions decreased with increases in mean annual temperature and reductions in precipitation, with MAOC responding similarly to POC. Therefore, our results suggest that ongoing climate warming and aridification may result in unforeseen carbon losses across global drylands, and that the protective role of minerals may not dampen these effects.The European Research Council, the Spanish Ministry of Science and Innovation, Generalitat Valenciana, the University of Alicante, the King Abdullah University of Science and Technology (KAUST), the KAUST Climate and Livability Initiative, the Hermon Slade Foundation, a María Zambrano fellowship funded by the Ministry of Universities and European Union-Next Generation plan, the US National Science Foundation, the Taylor Family–Asia Foundation Endowed Chair in Ecology and Conservation Biology, a Ramón y Cajal grant from the Spanish Ministry of Science, the German Research Foundation, German Federal Government for Science and Education, the Hans Merensky Foundation, FCT—Fundação para a Ciência e a Tecnologia, AdaptForGrazing project, LTsER Montado platform, and NASA.https://www.nature.com/nclimate/2025-01-30hj2024BiochemistryGeneticsMicrobiology and Plant PathologyPlant Production and Soil ScienceSDG-13:Climate actionSDG-15:Life on lan