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ERICK GONZALEZ MEDINA (2018, [Artículo])
Understanding the role of diet in the physiological condition of adults during reproduction and hence its effect on reproductive performance is fundamental to understand reproductive strategies in long-lived animals. In birds, little is known about the influence of the quality of food consumed at the beginning of the reproductive period and its short-term effects on reproductive performance. To assess the role of diet in the physiological condition of female blue-footed booby, Sula nebouxii (BFBO), during reproduction we evaluated whether individual differences in diet (assessed by using δ13C and δ15N values of whole blood from female birds and muscle tissue of the principal prey species) prior to egg laying and during incubation influenced their lipid metabolic profile (measured as triglyceride levels and C:N ratio) and their reproductive performance (defined by laying date, clutch size and hatching success). Females with higher δ15N values in their blood during the courtship and incubation periods had a higher lipid metabolic profile, earlier laying date, greater clutch size (2–3 eggs) and higher hatching success. Females that laid earlier and more eggs (2–3 eggs) consumed more Pacific anchoveta (Cetengraulis mysticetus) and Pacific thread herring (Opisthonema libertate) than did other females. These two prey species also had high amounts of lipids (C:N ratio) and caloric content (Kcal/g fresh weight). The quality of food consumed by females at the beginning of reproduction affected their physiological condition, as well as their short-term reproductive performance. Our work emphasizes the importance of determining the influence of food quality during reproduction to understand the reproductive decisions and consequences in long-lived animals. © 2018 González-Medina et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
nitrogen 15, triacylglycerol, lipid, animal experiment, Article, breeding, carbon nitrogen ratio, clutch size, controlled study, courtship, diet, egg laying, female, food intake, hatching, lipid metabolism, muscle tissue, nonhuman, prey, reproduction CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA CIENCIAS DE LA TIERRA Y DEL ESPACIO OCEANOGRAFÍA OCEANOGRAFÍA
DANIEL BADILLO ZAPATA (2014, [Artículo])
This is second part from an experiment where the nitrogen retention of poultry by-product meal (PBM) compared to fishmeal (FM) was evaluated using traditional indices. Here a quantitative method using stable isotope ratios of nitrogen (δ15N values) as natural tracers of nitrogen incorporation into fish biomass is assessed. Juvenile rainbow trout (Oncorhynchus mykiss) were fed for 80 days on isotopically distinct diets in which 0, 33, 66 and 100% of FM as main protein source was replaced by PBM. The diets were isonitrogenous, isolipidic and similar in gross energy content. Fish in all treatments reached isotopic equilibrium by the end of the experiment. Two-source isotope mixing models that incorporated the isotopic composition of FM and PBM as well as that of formulated feeds, empirically derived trophic discrimination factors and the isotopic composition of fish that had reached isotopic equilibrium to the diets were used to obtain a quantitative estimate of the retention of each source of nitrogen. Fish fed the diets with 33 and 66% replacement of FM by PBM retained poultry by-product meal roughly in proportion to its level of inclusion in the diets, whereas no differences were detected in the protein efficiency ratio. Coupled with the similar biomass gain of fishes fed the different diets, our results support the inclusion of PBM as replacement for fishmeal in aquaculture feeds. A re-feeding experiment in which all fish were fed a diet of 100% FM for 28 days indicated isotopic turnover occurred very fast, providing further support for the potential of isotopic ratios as tracers of the retention of specific protein sources into fish tissues. Stable isotope analysis is a useful tool for studies that seek to obtain quantitative estimates of the retention of different protein sources. © 2014 Badillo et al.
nitrogen 15, nitrogen, protein intake, animal behavior, animal experiment, animal food, animal tissue, aquaculture, Article, biomass, controlled study, energy metabolism, food composition, juvenile animal, nonhuman, poultry by product meal, protein a CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA CIENCIAS DE LA TIERRA Y DEL ESPACIO OCEANOGRAFÍA OCEANOGRAFÍA
Marco Antonio Bartens Olortegui (2013, [Tesis de maestría])
El Golfo de California es un rift continental activo con apertura oblicua y desplazamiento lateral derecho y es uno de los pocos ejemplos de un rift continental en la fase inicial donde los procesos de apertura activa se pueden estudiar a lo largo de un rift completo. En este escenario, establecer el límite entre basamento continental y oceánico es clave para entender los mecanismos tectónicos que actúan en esta etapa inicial del rift. Desafortunadamente, esta también es una tarea difícil debido a la presencia de corteza oceánica de nueva creación. El objetivo de este trabajo es el de identificar, delimitar y estimar espesores de la corteza oceánica y corteza continental en la cuenca Farallón. Para ellos se utilizaron datos de sísmica de reflexión multicanal 2D de alta resolucion tomados durante la expedicion Ulloa 2006, datos de anomlías gravimetricas tomados de la base de datos de la gravedad marina global obtenida por altimetría de radar relocalizada de los satélites Geosat y ERS-1. Para su interpretación se realizó modelado gravimetrico bidimensional a lo largo de cada perfil sísmico, seguido por una inversión 3D de los datos potenciales del área de la cuenca Farallón restringidos por los perfiles sísmicos interpretados. La corteza de característica oceánica se sitúa en el centro de la cuenca y se identifica principalmente por la concavidad de sus estructuras, interpretadas como sills en las secciones sísmicas, y por la elevada magnitud de la anomalía de Bouguer en el área. La corteza continental se localiza en los margenes oeste y este de la cuenca y se reconoce por la continuidad del reflector correspondiente y el significativo decremento de la anomalía de Bouguer. Tambien se identificaron: una corteza de naturaleza volcánica en el Macizo Farallón Sur (asociado a un reflector sísmico discontinuo de gran amplitud) y dos capas sobreyacientes de sedimentos, la más profunda afectada aparentemente por intrusiones magmáticas. Las profundidades interpretadas con los modelos gravimétricos indican que se tiene una corteza oceánica delgada al centro de la cuenca, con espesores mínimos de 2.5 km en el eje sur abandonado y 3 km en el eje de la dorsal, así como una corteza continental que se va engrosando gradualmente hacia el continente.
The Gulf of California is an active continental rift with an oblique and dextral opening displacement and it is one of the few examples of an initiating continental rift where active opening processes can be studied along a complete rift. In this scenary, establishing the boundary between continental and oceanic basement holds the key to fully understand the tectonic mechanisms acting on this initial rifting stage. Unfortunately, this is also a challenging task due to the presence of oceanic crust of new creation. The aim of this work is to identify, delineate and estimate the thickness of oceanic and continental crusts in the Farallón basin. For this purpose, they were used high-resolution 2D multichannel seismic reflection data from the Ulloa’s 2006 expedition along with gravity anomaly data from the global marine gravity database obtained by repositioned radar altimetry from Geosat and ERS-1 satellites. For their interpretation, two-dimensional gravity modeling was carried out along each seismic profile, followed by 3D inversion of potential field data from the Farallón basin area as constrained by the interpreted seismic profiles. The oceanic-like crust was located at the centre of the basin and is mainly identified by the concavity of their structures, interpreted as sills in the seismic sections, and the highamplitude of the Bouguer anomaly in the area. The continental crust is located in the western and eastern margins of the basin and it is distinguished by the relevant reflector’s continuity and the significant decrease of the Bouguer anomaly. They were also identified: a volcanic crust at the south of the Farallón Massif (associated to a prominent discontinuous seismic reflector) and two overlying sedimentary layers, the deepest one apparently affected by magmatic intrusions. The interpreted depths from the gravity models indicate that there is a thin oceanic crust at the center of the basin, with minimum thicknesses of 2.5 km in the abandoned south axis and 3 km in the dorsal axis, as well as a continental crust that gradually thickens towards the continent.
sísmica de reflexión, anomalía gravimétrica, Cuenca Farallón, Golfo de California seismic reflection, gravity anomaly, Farallon Basin, Gulf of California CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA CIENCIAS DE LA TIERRA Y DEL ESPACIO GEOFÍSICA SISMOLOGÍA Y PROSPECCIÓN SÍSMICA SISMOLOGÍA Y PROSPECCIÓN SÍSMICA
FERNANDO CONTRERAS CATALA (2016, [Artículo])
Effects of geostrophic kinetic energy flux on the three-dimensional distribution of fish larvae of mesopelagic species (Vinciguerria lucetia, Diogenichthys laternatus, Benthosema panamense and Triphoturus mexicanus) in the southern Gulf of California during summer and fall seasons of stronger stratification were analyzed. The greatest larval abundance was found at sampling stations in geostrophic kinetic energy-poor areas (<7.5 J/m3), where the distribution of the dominant species tended to be stratified. Larvae of V. lucetia (average abundance of 318 larvae/10m2) and B. panamense (174 larvae/10m2) were mostly located in and above the pycnocline (typically ∼ 40 m depth). In contrast, larvae of D. laternatus (60 larvae/10m2) were mainly located in and below the pycnocline. On the other hand, in sampling stations from geostrophic kinetic energy-rich areas (> 21 J/m3), where mesoscale eddies were present, the larvae of the dominant species had low abundance and were spread more evenly through the water column, in spite of the water column stratification. For example, in a cyclonic eddy, V. lucetia larvae (34 larvae/10m2) extended their distribution to, at least, the limit of sampling 200 m depth below the pycnocline, while D. laternatus larvae (29 larvae/10m2) were found right up to the surface, both probably as a consequence mixing and secondary circulation in the eddy. Results showed that the level of the geostrophic kinetic energy flux affects the abundance and the three-dimensional distribution of mesopelagic fish larvae during the seasons of stronger stratification, indicating that areas with low geostrophic kinetic energy may be advantageous for feeding and development of mesopelagic fish larvae because of greater water column stability. © 2016 Contreras-Catala et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Article, autumn, Benthosema panamense, Diogenichthys laternatus, environmental factor, environmental parameters, fish, geographic distribution, geostrophic kinetic energy, hydrography, larva, nonhuman, population abundance, population dispersion, pop CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA CIENCIAS DE LA TIERRA Y DEL ESPACIO OCEANOGRAFÍA OCEANOGRAFÍA
Freshwater exchanges and surface salinity in the Colombian basin, Caribbean Sea
Emilio Beier (2017, [Artículo])
Despite the heavy regional rainfall and considerable discharge of many rivers into the Colombian Basin, there have been few detailed studies about the dilution of Caribbean Surface Water and the variability of salinity in the southwestern Caribbean. An analysis of the precipitation, evaporation and runoff in relation to the climate variability demonstrates that although the salt balance in the Colombian Basin overall is in equilibrium, the area south of 12N is an important dilution sub-basin. In the southwest of the basin, in the region of the Panama-Colombia Gyre, Caribbean Sea Water is diluted by precipitation and runoff year round, while in the northeast, off La Guajira, its salinity increases from December to May by upwelling. At the interannual scale, continental runoff is related to El Niño Southern Oscillation, and precipitation and evaporation south of 12°N are related to the Caribbean Low Level Jet. During El Niño years the maximum salinification occurs in the dry season (December-February) while in La Niña years the maximum dilution (or freshening), reaching La Guajira Coastal Zone, occurs in the wet season (September-November). © 2017 Beier et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
sea water, fresh water, Article, Caribbean, dilution, dry season, El Nino, environmental parameters, evaporation, freshwater exchange, geographic distribution, molecular weight, oscillation, precipitation, river basin, salinity, seasonal variation, s CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA CIENCIAS DE LA TIERRA Y DEL ESPACIO OCEANOGRAFÍA OCEANOGRAFÍA
MAURO WILFRIDO SANTIAGO GARCIA (2019, [Artículo])
Gap wind jets (Tehuano winds) trigger supersquirts of colder water and mesoscale asymmetric dipoles in the Gulf of Tehuantepec (GT). However, the effects of successive gap wind jets on dipoles and their effects inside eddies have not yet been studied. Based on the wind fields, geostrophic currents, and surface drifter dispersion, this research documented three dipoles triggered and modified by Tehuano winds. Once a dipole develops, successive gap wind jets strengthen the vortices, and the anticyclonic eddy migrates southwestward while the cyclonic eddy is maintained on the east side of the GT. During the wind relaxation stage, the cyclonic eddy may propagate westward, but due to the subsequent re-intensification of the Tehuano winds, the vortex could break down, as was suggested by surface drifter dispersion pattern and geostrophic field data. The effect of the Tehuano winds was evaluating via eddy-Ekman pumping. Under Tehuano wind conditions, Ekman downwelling (upwelling) inside the anticyclonic (cyclonic) eddies may reach ~ -2.0 (0.5) m d-1 and decrease as the wind weakens. In the absence of Tehuano winds, Ekman downwelling inside the anticyclonic eddy was ~ 0.1 (-0.1) m d-1. The asymmetry of downwelling and upwelling inside eddies during Tehuano wind events may be associated with Tehuano wind forcing. © 2019 Santiago-García et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
article, dipole, leisure, Mexico, cold, ecosystem, factual database, geographic mapping, hurricane, Mexico, satellite imagery, season, water flow, wind, sea water, Cold Temperature, Cyclonic Storms, Databases, Factual, Ecosystem, Geographic Mapping, CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA CIENCIAS DE LA TIERRA Y DEL ESPACIO OCEANOGRAFÍA OCEANOGRAFÍA
Bertha Lavaniegos (2020, [Artículo])
Hyperiid amphipod species from the Gulf of Ulloa, Baja California, and the adjacent region (from the shelf break to 200 km offshore) were analyzed to evaluate diversity and abundances. This productive area supports small-scale commercial fisheries, including sand bass (Paralabrax nebulifer), California spiny lobster (Panulirus interruptus), abalones, clams, and others. Strong coastal upwelling events were observed during summer seasons of the period 2002-2008 between Punta Eugenia and Punta Abreojos. The upwelling plumes at Punta Abreojos are transported southward in slope waters bordering the coastal shelf of the Gulf of Ulloa, contributing to the separation of coastal and oceanic regions, and explain differences in amphipod diversity and abundances between both regions. In the offshore region, the most abundant species were Vibilia armata, Lestrigonus schizogeneios, Primno brevidens, and Eupronoe minuta, similar to previous findings in northern regions of Baja California and southern California. However, abundances of these species were lower (10-30 individuals/1000 m3), only reaching 20-50% of abundance levels reported off northern Baja California. In the coastal shelf of the Gulf of Ulloa, amphipods were virtually absent during 2002, 2003 and 2006. However, during 2004 and 2005, abundances of P. brevidens increased (54 and 20 ind/1000 m3, respectively). Moreover, during the late summer of 2007, abundances of L. schizogeneios, P. brevidens, Lycaea nasuta, Lycaea pulex, and Simorhynchotus antennarius increased considerably (261, 39, 31, 68, 416 ind/1000 m3, respectively), indicating occasional utilization of the coastal shelf by pelagic amphipods. Changes in gelatinous populations (medusae, siphonophores, ctenophores, doliolids, and salps) paralleled changes in hyperiid populations, with highest abundances in 2005-2008 in the coastal shelf. Significant correlations of 17 amphipod species with gelatinous taxa, which are often used as host organisms by hyperiid amphipods, suggest that gelatinous presence enhanced hyperiid abundance and promoted the progression of hyperiid amphipods onto the coastal shelf during parts of the 2002-2008 period. © 2020 Bertha E. Lavaniegos. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
abalone, Amphipoda, article, Baja California, clam, clinical article, Ctenophora, Eugenia, female, fishery, human, human experiment, male, medusa, nonhuman, Panulirus interruptus, plume, summer, zooplankton, Amphipoda, animal, California, ecosystem, CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA CIENCIAS DE LA TIERRA Y DEL ESPACIO OCEANOGRAFÍA OCEANOGRAFÍA
CLARA LUZ VILLANUEVA AGUILAR (2024, [Tesis de doctorado])
“Las constelaciones familiares (en adelante CF), como una modalidad o método terapéutico, han tenido un crecimiento importante en las últimas décadas, una muestra concreta es que diferentes plataformas de streaming tienen series completas que se focalizan en las CF o que al menos las presentan como una modalidad terapéutica en boga. Cuando se hace una búsqueda en internet, Google arroja cientos de respuestas, entre ellas: centros de CF, publicaciones, así como diferentes alcaldías de la CDMX, aparecen anuncios de centros de CF incluidas sus actividades. Este hecho en sí es un fenómeno social que es pertinente estudiar, más aún cuando el desarrollo de esta psicoterapia se acrecentó durante el confinamiento a causa de la pandemia por COVID 19, a partir del uso de recursos terapéuticos y digitales, lo cual fue novedoso y también indispensable para la continuidad de su desarrollo. En este sentido, nos interesó comprender qué objetivos llevan a lxs consultantes a utilizar esta terapéutica, cuáles son sus necesidades de salud física, mental y emocional y si están encontrando en esta psicoterapia una eficacia empírica y/o simbólica por la cual los grupos CF están creciendo sostenidamente, aun durante el confinamiento. También consideramos relevante comprender cuáles son los elementos más y menos cuestionables de este tipo de terapia para consultantes y curadorxs, tomando en cuenta que su auge no solo está relacionado a aspectos positivos, ya que existen otros elementos que están en juego en el desarrollo de todo método terapéutico. Consideramos que un aspecto fundamental en el estudio del crecimiento de esta terapéutica, es la descripción y el análisis comparativo entre las características y funciones de las CF en relación con las características y funciones de la biomedicina, desde la perspectiva de los actores involucrados; ya que por un lado, la búsqueda de atención a la salud en forma integral”.
Familias - Aspectos psicológicos. Sistemas sociales. Enfermos - Relaciones familiares. Terapia sistémica (Terapia familiar). Teoría de las constelaciones familiares. Tesis - Doctorado en Antropología, CDMX. CIENCIAS SOCIALES SOCIOLOGÍA PROBLEMAS SOCIALES ENFERMEDAD ENFERMEDAD
Editorial: The Approach to Complex Systems in Fisheries
César Augusto Salinas Zavala MARIA VERONICA MORALES ZARATE ANDRES MIGUEL CISNEROS MONTEMAYOR Luis Antonio Bojórquez Tapia (2022, [Artículo])
CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA CIENCIAS AGRARIAS PECES Y FAUNA SILVESTRE DINÁMICA DE LAS POBLACIONES DINÁMICA DE LAS POBLACIONES
Evaluación de sobrecarga por cifrado en redes multisalto para la internet de las cosas médicas
Evaluation of encryption overload in multihop networks for the internet of medical things
Adrián Neftalí Sánchez (2022, [Tesis de maestría])
El Internet de las cosas médicas (IoMT por sus siglas en ingles) permitirá habilitar servicios y aplicaciones enfocados a diagnósticos más precisos y mejorar la cobertura efectiva de los sistemas de salud. Para esto, es necesario la recolección y envío de información de salud de las personas a través de sensores que monitorean continuamente los signos vitales de las personas. El envío a través de redes para el internet de las cosas (IoT por sus siglas en ingles) de información de salud plantea varios retos importantes para los sistemas de comunicaciones. Uno de los más relevantes es el de preservar la confidencialidad y privacidad de la información desde su recolección hasta su tratamiento y almacenamiento. Esto es especialmente complejo considerando que los sensores utilizados suelen tener pocos recursos en términos de memoria y capacidad de procesamiento. Por lo tanto se han propuesto una serie de algoritmos que cifran esta información de una manera eficiente usando los recursos limitados con los que cuentan estos dispositivos. Estos algoritmos han sido evaluados desde la perspectiva de consumo de potencia y rendimiento. Sin embargo, no se ha hecho una evaluación de cómo éstos afectan el comportamiento de una red IoMT en su conjunto. El presente trabajo de investigación busca evaluar el comportamiento de la implementación de una red IoMT cuya pila de tecnologías en su capa de seguridad utilice algoritmos de cifrado ligero para proteger información desde el momento de conformación de la red. Para realizar esta evaluación se consideraron 5 candidatos de algoritmos de cifrado ligero del concurso que está llevando a cabo el instituto nacional de estándares y tecnología de los Estados Unidos (NIST por sussiglas en ingles), con los cuales utilizando métricas de red, se evaluó el comportamiento de la red al variar entre los distintos algoritmos de cifrado ligero además de compararlos con una implementación del cifrado por defecto AES-128 y una implementación sin ningún tipo de cifrado. Para realizar las diferentes implementaciones con las que se realizó esta evaluación se utilizó el sistema operativo IoT Contiki-ng el cual fue implementado tanto en dos distintos simuladores (Cooja y Renode) como en el dispositivo físico Sensortag-CC2650.
The Internet of medical things (IoMT) will enable services and applications focused on more accurate diagnoses and improve the effective coverage of health systems. For this, it is necessary to collect and send people’s health information through sensors that continuously monitor people’s vital signs. Delivering health information over internet of things networks (IoT) poses several significant challenges for communications systems. One of the most relevant is to preserve the confidentiality and privacy of the information from its collection to its treatment and storage. This is especially complex considering that the sensors used tend to have few resources in terms of memory and processing capacity. Therefore, a series of algorithms have been proposed that encrypt this information efficiently using the limited resources available to these devices. These algorithms have been evaluated from the perspective of power consumption and performance. However, no assessment has been made of how these affect the behavior of an IoMT network as a whole. This research work seeks to evaluate the behavior of an implementation of an IoMT network whose stack of technologies in its security layer uses lightweight encryption algorithms to protect information from the moment the network is formed. To carry out this evaluation, 5 candidates for lightweight encryption algorithms from the contest being carried out by National Institute of Standards and Technology (NIST) were considered, with which, using network metrics, the behavior of the network was evaluated for different lightweight encryption algorithms in addition to comparing them. with an implementation of the default encryption AES-128 and an implementation without any encryption. To carry out the different implementations with which this evaluation was carried out, the IoT Contiki-ng operating system was used, which was implemented both in two different simulators (Cooja and Renode) and in the physical device Sensortag-CC2650.
IoT, IoMT, Contiki-NG, WSN, 6LoWPAN, RPL, IPv6, DTLS, TLS, PSK, TinyDTLS, CoAP, CC2650, CC2538, Grain-128AEAD, Xoodyak, ASCON, GIFT-COFB, TinyJambu, AES-128 IoT, IoMT, Contiki-NG, WSN, 6LoWPAN, RPL, IPv6, DTLS, TLS, PSK, TinyDTLS, CoAP, CC2650, CC2538, Grain-128AEAD, Xoodyak, ASCON, GIFTCOFB, TinyJambu, AES-128 INGENIERÍA Y TECNOLOGÍA CIENCIAS TECNOLÓGICAS TECNOLOGÍA DE LAS TELECOMUNICACIONES TECNOLOGÍA DE LAS TELECOMUNICACIONES