A5084591014- Wildlife Ecology and Conservation
- Animal Behavior and Reproduction
- Animal Ecology and Behavior Studies
- Ecology and Vegetation Dynamics Studies
- Pancreatitis Pathology and Treatment
- Sperm and Testicular Function
- Endoplasmic Reticulum Stress and Disease
- Genetic and phenotypic traits in livestock
- Heat shock proteins research
- Ecology and biodiversity studies
- Liver Disease Diagnosis and Treatment
- Hepatitis B Virus Studies
- Animal Behavior and Welfare Studies
- Demographic Trends and Gender Preferences
- Species Distribution and Climate Change
- Reproductive Biology and Fertility
- Rangeland and Wildlife Management
- Fish biology, ecology, and behavior
- Livestock and Poultry Management
- Animal Virus Infections Studies
- Global Maternal and Child Health
- Avian ecology and behavior
- Genetic diversity and population structure
- Pancreatic and Hepatic Oncology Research
- Phagocytosis and Immune Regulation
Universidad de Alcalá
2018-2024
Imperial College London
2008-2024
Dirección de Investigación y Desarrollo
2023
Ação Educativa
2023
Museo Nacional de Ciencias Naturales
2004-2021
University of Almería
2019
University of Oxford
2013-2019
Helmholtz Zentrum München
2018-2019
Technical University of Munich
2018-2019
Institute of Virology of the Slovak Academy of Sciences
2018
Male reproductive success is determined by the ability of males to gain sexual access females and their fertilize ova. Among polygynous mammals, differ markedly in success, a great deal effort has been made understand how selective forces have shaped traits that enhance male competitiveness both before after copulation (i.e., sperm competition). However, possibility also may fertility ignored under assumption infertility rare natural populations because selection against it likely be strong....
Spermatozoa vary enormously in their form and dimensions, both between within species, yet how this variation translates into fertilizing efficiency is not known. Sperm swimming velocity a key determinant of male fertilization success, but previous efforts to identity which sperm phenotypic traits are associated with have been unsuccessful. Here, we examine the relationship size several components natural populations red deer ( Cervus elaphus hispanicus ) where selective pressures enhance...
Evolutionary theory proposes that exaggerated male traits have evolved via sexual selection, either through female mate choice or male–male competition. While preferences for ornamented males been amply demonstrated in other taxa, among mammals characters are commonly regarded as weapons whose main function is to enhance competitiveness agonistic encounters. One particularly controversial hypothesis explain the of they advertise fertility. We test this red deer ( Cervus elaphus ), a species...
Efforts to test sex ratio theory have focused mostly on females. However, when males possess traits that could enhance the reproductive success of sons, would also benefit from manipulation offspring ratio. We tested prediction more-fertile red deer produce more sons. Our findings reveal male fertility is positively related proportion offspring. show there a positive correlation between percentage morphologically normal spermatozoa (a main determinant fertility) and Thus, may contribute...
Testosterone has been proposed to have a dual effect, enhancing sexual traits while depressing parasite resistance in males. Here, we test this hypothesis red deer, examining males from captive populations during the whole annual cycle and natural breeding season. We first explored effects of body size, age sampling date on testosterone avoid confounding effects. Our results show that seasonal changes levels were mirrored by testes rut there was strong correlation between both. In...
Carnivore and humans live in proximity due to carnivore recovery efforts ongoing human encroachment into habitats globally. The American West is a region that uniquely exemplifies these human-carnivore dynamics, however, it unclear how the research community here integrates social ecological factors examine relations. Therefore, strategies promoting coexistence are urgently needed. We conducted systematic review on relations covering studies between 2000 2018. first characterized across...
Abstract The results of a study testing the hypothesis that wildcats Felis silvestris are rodent‐specialist predators is reported. diet was studied in different habitats from central Spain where rabbits Oryctolagus cuniculus were either present or absent order to explore whether wildcat facultative rodent specialist. We predicted if specialist there would be no differences composition scats between areas with without another profitable prey such as rabbits. To test this hypothesis, 239...
Long-term storage of semen by cryopreservation, with high recovery rates on thawing, is essential for the establishment genetic resource banks endangered species. The purpose present study was to evaluate various diluents cryopreservation spermatozoa from three species gazelles (genus Gazella) in a captive breeding program. compared were Tes (N-tris(hydroxymethyl)methyl-2 aminoethane sulfonic acid)-Tris 5% egg yolk and 6% glycerol (TEST) Triladyl, yolk-citrate, Tris-trehalose,...
Endoplasmic reticulum (ER) stress leads to accumulation of un- or misfolded proteins inside the ER and initiates unfolded protein response (UPR). Several UPR components are physiologically involved in pancreatic development pathophysiologically activated during acute pancreatitis. However, exact role exocrine acini is mainly unclear. The present study examined effects tauroursodeoxycholic acid (TUDCA), a known chaperone, on acinar function components. Isolated rat were stimulated by...
Invasive plants can have dramatic effects on natural ecosystems. It is unclear, though, whether these will a positive or negative effect animal species' behavior and population parameters within ecosystems where invasive occur. Here, we use 2-year time series of mouse trapping data to test the an evergreen shrub, Rhododendron ponticum, distribution abundance in wood mice (Apodemus sylvaticus) southern England. Given importance aerial predators rodent survival shield that thick cover branches...
This study tested the relationships between both individual-level and predation-risk factors size of two home-range regions (HRR), defined as areas different intensities use. We have expanded on previous studies by testing effects previously ignored factors: androgenization energy reserves (body fat). Location data were collected for wild individuals Apodemus sylvaticus using novel method implanted PIT tags mobile recording stations. A total 68 home ranges estimated kernel density...
ABSTRACT Recently, a number of papers have addressed the use pedigrees in study wild populations, highlighting value conservation management. We used to horses ( Equus caballus ) Assateague Island National Seashore, Maryland, USA, one small free‐ranging animal populations that been subject long‐term studies. This population grew from 28 1968 175 2001, causing negative impacts on island ecosystem. To minimize these effects, an immunocontraception program was instituted, and horse numbers are...
Sex ratio allocation has important fitness consequences, and theory predicts that parents should adjust offspring sex in cases where the returns of producing male female vary. The ability fathers to bias ratios traditionally been dismissed given expectation an equal proportion X- Y-chromosome-bearing sperm (CBS) ejaculates due segregation chromosomes at meiosis. This recently refuted. Here we used Peromyscus leucopus demonstrate is explained by exclusive effect father, suggest a likely...
Mice (Peromyscus leucopus noveboracensis) from a captive-breeding program were used to test the effects of three genetic breeding protocols (minimizing mean kinship [MK], random breeding, and selection for docility [DOC]) inbreeding levels on sperm traits fertility. Earlier, in generation 8, one DOC replicate went extinct because poor reproductive success. By 10, spermatozoa mice had more acrosome midpiece abnormalities, which shown be strong determinants fertility, as well lower production...
The National Park Service (NPS) manages a culturally significant population of feral horses (Equus caballus) inhabiting the Maryland portion Assateague Island, barrier island in eastern United States. Rapid growth this over past few decades from 28 to 166 negatively impacts native species and ecological processes on island. Since 1994, contraception via porcine zona pellucida vaccine has been used control horse numbers, although herd reduction slower than initially expected, leading NPS...
The lesser kestrel Falco naumanni is a facultative colonial falconiform whose breeding range stretches across the entire Palaearctic. As with other pseudo-steppe birds, has experienced sharp decline in western Europe over last decades, spurring conservation actions. We compared natal philopatry of captive versus wild-bred individuals and effect release date on by comparing return data captive- kestrels from 13 colonies between 2004 2019. found that show significantly stronger than their...