Search results for "Population"

Color-assortative mating in a color-polymorphic lacertid lizard

2013

Color polymorphisms are common in lizards, which provide an excellent model system to study their evolution and adaptive function. The lacertid genus Podarcis is particularly interesting because it comprises several polymorphic species. Previous studies with lacertid lizards have tried to explain the maintenance of color polymorphisms by correlational selection between color morphs and several phenotypic traits. Particular attention has been paid to their putative role as signals reflecting alternative reproductive strategies under frequency-dependent selection, but the relationship between mating patterns and color polymorphism has not been previously considered. In this study, we use long…

La percepción social de la inmigración en el Área Metropolitana de València tras más de una década de políticas de integración / / / \ \ \ The social…

2020

Resumen: Este artículo pretende perfilar, a través de una metodología empírica basada en encuestas, el rendimiento en términos de percepción social de la inmigración, de las políticas de integración en el Área Metropolitana de València. A tal fin, en primer lugar, se han descrito las líneas estratégicas de la planificación de las políticas de integración; a continuación se ha detallado la evolución de la población extranjera durante las dos últimas décadas en este ámbito territorial; y, por último, se analizan los datos obtenidos de las encuestas realizadas con tal objetivo. Los resultados de la investigación muestran que el área metropolitana tiene un patrón de respuesta similar, en términ…

Mictic patterns of the rotifer Brachionus plicatilis Müller in small ponds

1995

Populations of the rotifer Brachionus plicatilis were monitored in three small ponds in a marsh on the Mediterranean coast. Samples were taken approximately every three weeks from July 1992 to November 1993. Salinity, temperature, conductivity, pH and oxygen concentration were measured in the field. Population density was determined from preserved quantitative samples. Individuals were classified as mictic females, amictic females, non-ovigerous females, and males, differentiating between two morphotypes (‘S’ and ‘L’). From these counts, a level of mixis was calculated. We also determined the proportion of mictic females in natural populations by culturing females isolated from fresh sample…

The Female Handball Player

2018

Female hormones fluctuate in concentrations during the menstrual cycle. This has triggered speculations among athletes, coaches, as well as researchers about the hormonal changes that lead to variations in athletic performance and adaptation to training. Many athletes, as in the general population, use oral contraceptives. This has raised questions concerning the suppression of the endogenous circulating female hormones and if the administration of synthetic hormones may have negative impact on athletic performance and training adaptations – or the opposite.

Preliminary health screening and possible pathogen determination in aBufo bufo(Linnaeus, 1758) (Amphibia: Bufonidae) population

2010

The population of the common toad, Bufo bufo, on Jersey (Channel Islands, UK) has undergone a marked decline over recent years. Hypothesized causes for this decline include land use change, pollution, climate change and predation. We examined the carcasses of 97 wild adult common toads for gastrointestinal and pulmonary helminths. In addition, 31 adult toad carcasses were examined for the presence of ranavirus infection, and 212 wild common toads were examined for the presence of infection with the fungus Batrachochytrium dendrobatidis. Three nematode species Rhabdias bufonis, Aplectana macintoshii and Oswaldocruzia filiformis, and one species of cestode, Nematotaenia dispar, were identifie…

2021

(1) Background: This cross-sectional study aims to compare a new and non-invasive approach using hyperspectral imaging (HSI) with the conventional modified Allen’s test (MAT) for the assessment of collateral perfusion prior to radial forearm free flap harvest in healthy adults. (2) HSI of the right hand of 114 patients was recorded. Here, three recordings were carried out: (I) basic status (perfusion), (II) after occlusion of ulnar and radial artery (occlusion) and (III) after releasing the ulnar artery (reperfusion). At all recordings, tissue oxygenation/superficial perfusion (StO2 (0–100%); 0–1 mm depth), tissue hemoglobin index (THI (0–100)) and near infrared perfusion index/deep perfusi…

EXPLORING THE OBSTACLES OF LATVIAN FOOD COMPANIES EXPORT TO CHINA

2016

As we know, China is the biggest trader in the world. European Commission has revealed that China has become the European Union (EU)`s second largest trading partner behind the United States, and EU is China`s biggest trading partner. This situation just proves the necessity of making good partnership with China, which is especially needed for such a small country as Latvia. The main export fields for Latvia are wood, metal, electrical devices and minerals. As the population of China is growing very fast, leading to more than one billion people in 2016 (increased for more than 41 million in last six years), the food market is in need of more and more products. Of course, Chinese market may …

Signos y síntomas de adicción al cibersexo en adultos mayores

2019

El uso de Internet con objetivos sexuales resulta una práctica cada vez más generalizada en cualquier etapa vital. Si bien en la mayoría de casos el consumo se realiza de forma recreativa, en ocasiones éste puede sobrevenir compulsivo, incontrolado y asociado a un deterioro funcional en diversos ámbitos (adicción al cibersexo). Conocer los síntomas que caracterizan este cuadro clínico constituye una prioridad; sin embargo, disponemos de un pobre conocimiento acerca de su expresión en adultos mayores. Así, este trabajo se planteó con un doble objetivo: 1) analizar la prevalencia de adultos mayores en riesgo de desarrollar o que muestran un perfil patológico de uso del cibersexo y 2) elaborar…

Application of a Bayesian Spatiotemporal Surveillance Method to NYC Syndromic Data

2014

Incorporating prior knowledge (e.g., the spatial distribution of zip codes and background population effects) into a model using Bayesian methods could potentially improve outbreak detection. We adapted a previously described Bayesian model-based spatiotemporal surveillance technique to daily respiratory syndrome counts in NYC Emergency Department data in 2009, the year of the H1N1 influenza pandemic. Citywide, 56 alarms were produced across 15 zip codes, all during days of elevated respiratory visits. Future work includes evaluating our choice of baseline length, considering other alarm thresholds, and conducting a formal evaluation of the method across five syndromes in NYC.

Bayesian reanalysis of a quantitative trait locus accounting for multiple environments by scaling in broilers1

2006

A Bayesian method was developed to handle QTL analyses of multiple experimental data of outbred populations with heterogeneity of variance between sexes for all random effects. The method employed a scaled reduced animal model with random polygenic and QTL allelic effects. A parsimonious model specification was applied by choosing assumptions regarding the covariance structure to limit the number of parameters to estimate. Markov chain Monte Carlo algorithms were applied to obtain marginal posterior densities. Simulation demonstrated that joint analysis of multiple environments is more powerful than separate single trait analyses of each environment. Measurements on broiler BW obtained from…