LISTA DE LOS MAMÍFEROS TERRESTRES DE CHIAPAS: ENDEMISMO Y ESTADO DE CONSERVACIÓN

This work presents an updated taxonomic list of the mammals of Chiapas, including 204 species, from which 106 (52%) species are bats. From the total species, seven are endemic to Chiapas, nine are considered endemic to Mexico, and 50 are endemic to Mesoamerica. Although the 56.1% (66) of the endemic species are rodents, the species richness of this group is relatively low, since only 48 species occur in the state. With regards to the conservation status, 31.9% of the mammalian species in Chiapas are listed within a special category in the NOM-059 while the IUCN considers only 19.1%, and CITES 11.8%. Protection of all endemic species must be considered in the wildlife conservation policy for Chiapas. Regional studies to generate information about this species in Chiapas need to be priorized. Indeed, studies are basic to build up any support wildife management and conservation plan.En este trabajo se presenta la lista taxonómica actualizada de los mamíferos terrestres del Estado de Chiapas, cuya composición mastofaunística está representada por 204 especies, de las cuales 106 (52%) son quiropteros. Del total de especies registradas, siete son endémicas de Chiapas, nueve endémicas de México y 50 endémicas de Mesoamérica. A pesar de que el 56.1% de estas 66 especies endémicas pertenecen al Orden Rodentia, la riqueza de rodeores se puede considerar como pobre para el Estado, ya que solo se registran 48 especies. Con respecto al estado de conservación de los mamíferos que habitan en Chiapas, el 31.9% de las especies se encuentra enlistado dentro de alguna categoría especial de protección en la NOM-059, en tanto que la UICN clasifica al 19.1% de ellas y el CITES incluye en sus apéndices el 11.8% del total de especies. La política estatal de conservación de la fauna silvestre deberá atender la protección de las especies endémicas que habitan en Chiapas y dar prioridad a los estudios que generen información sobre estas especies a nivel regional. Pues sólo con ello, se puede llegar a tener una base más sólida en el conocimiento de la diversidad mastofaunística de Chiapas que permita instrumentar un plan de manejo y conservación

Deep LOFAR 150 MHz imaging of the Bo\"otes field: Unveiling the faint low-frequency sky

We have conducted a deep survey (with a central rms of $55\mu\textrm{Jy}$) with the LOw Frequency ARray (LOFAR) at 120-168 MHz of the Bo\"otes field, with an angular resolution of $3.98^{''}\times6.45^{''}$, and obtained a sample of 10091 radio sources ($5\sigma$ limit) over an area of $20\:\textrm{deg}^{2}$. The astrometry and flux scale accuracy of our source catalog is investigated. The resolution bias, incompleteness and other systematic effects that could affect our source counts are discussed and accounted for. The derived 150 MHz source counts present a flattening below sub-mJy flux densities, that is in agreement with previous results from high- and low- frequency surveys. This flattening has been argued to be due to an increasing contribution of star-forming galaxies and faint active galactic nuclei. Additionally, we use our observations to evaluate the contribution of cosmic variance to the scatter in source counts measurements. The latter is achieved by dividing our Bo\"otes mosaic into 10 non-overlapping circular sectors, each one with an approximate area of $2\:\textrm{deg}^{2}.$ The counts in each sector are computed in the same way as done for the entire mosaic. By comparing the induced scatter with that of counts obtained from depth observations scaled to 150MHz, we find that the $1\sigma$ scatter due to cosmic variance is larger than the Poissonian errors of the source counts, and it may explain the dispersion from previously reported depth source counts at flux densities $S<1\,\textrm{mJy}$. This work demonstrates the feasibility of achieving deep radio imaging at low-frequencies with LOFAR.Comment: A\&A in press. 15 pages, 16 figure

Nutraceutical and technological properties of buffalo and sheep cheese produced by the addition of kiwi juice as a coagulant

Kiwifruit is an interesting alternative to chymosin for milk coagulation. Although the clotting properties of actinidin (the proteolytic agent present in kiwi) have been widely investigated, little is known about the nutraceutical and organoleptic effects of kiwifruit on the characteristics of cheese. We investigated kiwifruit pulp, compared to calf rennet, in cheesemaking using sheep and buffalo milk. Although the kiwifruit extract showed a longer coagulation and syneresis time than calf rennet, it could nevertheless be exploited as a plant coagulant due to its positive effect on the nutraceutical properties. In fact, the sheep and buffalo cheese were higher in polyphenols and phytosterols than the cheese obtained using calf rennet. In addition, the nutraceutical properties were enhanced, with just a slight effect on the aroma of the cheese

Two new species of Pergalumna (Acari, Oribatida, Galumnidae) from Costa Rica, including a key to all species of the genus from the Neotropical region

Two new species of oribatid mites of the genus Pergalumna (Oribatida, Galumnidae), P. elongatiporosa sp. n. and P. striatiprodorsum sp. n., are described from leaf litter of a secondary forest in Costa Rica. Pergalumna elongatiporosa sp. n. is most similar morphologically to P. horvathorum P. Balogh, 1997 and P. sura P. Balogh, 1997, however, it differs from both by the body size, body surface ornamentation and morphology of notogastral porose areas A1 and A3. Pergalumna striatiprodorsum sp. n. is most similar morphologically to P. hawaiiensis hawaiiensis (Jacot, 1934) and P. strigulata Mahunka, 1978, however, it differs from P. hawaiiensis by the length of interlamellar setae and surface ornamentation of the prodorsum; from P. strigulata by the surface of ornamentation of the notogaster, length of interlamellar setae and morphology of bothridial setae. An identification key to known species of Pergalumna from the Neotropical region is given.UCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Básicas::Centro de Investigación en Estructuras Microscópicas (CIEMIC

Lista de los mamíferos terrestres del estado de Campeche, México

We present the updated taxonomic list of land mammals of the State of Campeche, which is composed of 111 species, equivalent to 22% representation at the national level; the bats, carnivores and rodents make up 80% of the records. According to the distribution of land mammals, Campeche only has a representative endemic, the subspecies Reithrodontomys gracilis insularis. Regarding the protection status of the species recorded in the state, 29% are within some category of protection in the NOM-059, while IUCN notes to all species, although 90% in minor category (LC) and, finally, 21 records are included in the CITES Appendices. In this way, this study establishes the level of knowledge of this fauna to state and national level, which is useful in the decision making process to promote the conservation and management planning for each of the species.Presentamos la lista taxonómica actualizada de los mamíferos terrestres del estado de Campeche, que se compone por 111 especies, lo que equivale al 22% de representatividad a nivel nacional; los quirópteros, carnívoros y roedores constituyen el 80% del total de los registros. De acuerdo a la distribución que siguen los mamíferos terrestres, en Campeche sólo se cuenta con un representante endémico, la subespecie Reithrodontomys gracilis insularis. En cuanto al estado de protección de las especies registradas en el Estado, se tiene que el 29% se encuentra dentro de alguna categoría de protección en la NOM-059, en tanto que la UICN anota a todas las especies, aunque el 90% en la categoría de menor importancia (LC), y por último, 21 de los  registros se incluyen en los apéndices del CITES. De este modo, el presente estudio establece el estado de conocimiento de este grupo faunístico a nivel estatal y nacional, el cual es de gran utilidad en el proceso de toma decisiones para favorecer la conservación y la planificación del manejo de cada una de las especies

CASO 9-2014: Peritonitis por Rahnella aquatilis en un paciente en Diálisis Peritoneal Crónica Ambulatoria

Masculino de 34 años, quien se encuentra en el programa de Diálisis Peritoneal Crónica Ambulatoria (DPCA) del Hospital San Juan de Dios (HSJD), debido a una Insuficiencia Renal Crónica (IRC) Estadio 5; quien presentó una peritonitis bacteriana asociada a DPCA. En el líquido peritoneal se aisló Rahnella aquatilis. Se observó adecuada resolución del caso tras cobertura antibiótica con Cefotaxime intraperitoneal. Este es el primer caso reportado en Costa Rica de peritonitis bacteriana causada por Rahnella aquatilis en un paciente de DPCA

The oribatid mite genus Benoibates (Acari, Oribatida, Oripodidae)

Two species of oribatid mites of the genus Benoibates (Oribatida, Oripodidae), i.e., B. bolivianus Balogh & Mahunka, 1969(a) and B. minimus Mahunka, 1985, are recorded for the first time in Costa Rica. Both are redescribed in details, using drawings, images and SEM micrographs, on the basis of Costa Rican specimens. An identification key to the known species of Benoibates is given.UCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Básicas::Centro de Investigación en Estructuras Microscópicas (CIEMIC

Do High-Velocity Clouds trace the Dark Matter subhalo population?

Within the cosmological concordance model, Cold Dark Matter (CDM) subhalos form the building blocks which merge hierarchically to more massive galaxies. Since intergalactic gas is accreted by massive galaxies, observable e.g. as high- velocity clouds (HVCs) around the Milky Way, with extremely low metallicities, these can be suggested to represent the baryonic content of primordial Dark Matter (DM) subhalos. Another possibility of their origin is that they stem from disrupted satellite galaxies, but in this case, these gas clouds move unaccompanied by a bound DM structure. Since HVCs are observed with long gas tails and with irregular substructures, numerical models are performed aiming at exploring their structure and compare them with observations. If HVCs are engulfed by DM subhalos, their gas must leave the DM gravitational potential and reflect this in their dynamics. On the other hand, the evolution and survival of pure gas models must be tested to distinguish between DM-dominated and DM-free clouds and to allow conclusions on their origin. The models demonstrate that purely baryonic HVCs with low masses are disrupted by ram-pressure stripping and Kelvin-Helmholtz instabilities, while more massive ones survive, losing their initially spherical shape and develop significant substructures including cometary elongations in the column density distribution ("head-tail structure"). On the contrary, HVCs with DM subhalos survive with more than 90% of their gas mass still bound and spherically shaped, approaching the Galactic disk like bullets. In addition, we find that velocity gradients along the cometary head-tail structures does not necessarily offer a possibility to distinguish between DM-dominated and purely gaseous HVCs. Comparison of models with observations let us conclude that HVCs are not embedded in a DM substructure and do not trace the cosmological subhalo population.Comment: Accepted for publication in A&