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Jesús Ortega Giménez

Jesús Ortega Giménez
Institute of Evolutionary Biology (CSIC-UPF) · Gonzalez Lab

PhD

About

51
Publications
9,886
Reads
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292
Citations
Citations since 2016
32 Research Items
255 Citations
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201620172018201920202021202201020304050
201620172018201920202021202201020304050
201620172018201920202021202201020304050

Publications

Publications (51)
Article
Full-text available
Arid climates are characterized by a summer drought period to which animals seem adapted. However, in some years, the drought can extend for unusually longer periods. Examining the effects of these current extreme weather events on biodiversity can help to understand the effects of climate change, as models predict an increase in drought severity....
Article
Full-text available
Adaptation to new ecological niches is known to spur population diversification and may lead to speciation if gene flow is ceased. While adaptation to the same ecological niche is expected to be parallel, it is more difficult to predict whether selection against maladaptive hybridization in secondary sympatry results in parallel divergence also in...
Article
Investing in the current reproduction requires diverting energy resources from other metabolic functions, which may compromise future reproduction and lifespan. To solve this trade-off, an individual may consider its labile state to decide how much to invest in current reproduction. We tested experimentally whether the “state quality” of male rock...
Preprint
Full-text available
Divergent ecological selection may diversify populations of the same species evolving in different niches. However, for adaptation to result in speciation, the ecologically divergent populations have to experience at least some degree of reproductive isolation. While ecological selection pressures in similar environments are expected to result in c...
Article
Full-text available
Background The movement and spatial ecology of an animal depends on its morphological and functional adaptations to its environment. In fossorial animals, adaptations to the underground life help to face peculiar ecological challenges, very different from those of epigeal species, but may constrain their movement ability. Methods We made a long-te...
Article
Full-text available
Kin recognition is a phenomenon with an important function in maintaining cohesive social groups in animals. Several studies have examined parent–offspring recognition in species with direct parental care. Few studies have, however, explored parent–offspring recognition in animals that, at best, only show apparent indirect parental care, such as so...
Article
The phylogenetic relationships among the wall lizards of the Podarcis hispanicus complex that inhabit the south‐east (SE) of the Iberian Peninsula and other lineages of the complex remain unclear. In this study, four mitochondrial and two nuclear markers were used to study genetic relationships within this complex. The phylogenetic analyses based o...
Article
Full-text available
Maintaining social relationships depends on the ability to recognize partners or group members against other individuals. This is especially important in animals with relatively stable social groups. The amphisbaenian Trogonophis wiegmanni is a semi blind fossorial reptile that spends its entire life underground where it interacts with mates and so...
Article
Sexual signals can be evolutionarily stable if they are condition dependent or costly to the signaler. One of these costs may be the trade-off between maintaining the immune system and the elaboration of ornaments. Experimental immune challenges in captivity show a reduction in the expression of sexual signals, but it is not clear whether these det...
Preprint
Full-text available
Many field studies of ecology or conservation require individual identification of the animals, and for this, several marking techniques have been developed. However, no specific labeling technique has been tested for fossorial reptiles, such as amphisbaenians. We describe the use of Passive Integrated Transponder (PIT) tags as a long-term labeling...
Data
Lipophilic compounds found in P. liolepis femoral pore secretions from two populations in the Midi-Pyrenees. (DOC)
Data
Factor loadings for the PCA on ventral coloration of Podarcis liolepis lizards. (DOCX)
Data
Factor scores for the PCA on ventral coloration of Podarcis liolepis lizards. (DOCX)
Data
Summary statistics (mean + SE) for ventral and dorsal coloration in P. liolepis lizards. (DOCX)
Data
Factor scores for the PCA on dorsal coloration of Podarcis liolepis lizards. (DOCX)
Data
Lipophilic compounds found in P. liolepis femoral pore secretions from two populations in the Midi-Pyrenees. (DOCX)
Data
GenBank accesión number for the genetic samples used in this study. PL codes refer to P.liolepis individuals sampled in the Midi-Pyrenees. Med1 and Bur2 (from Medinaceli and Burgos, respectively) and MT1 (P. muralis) are sequences obtained from GenBank. (DOCX)
Data
Factor loadings for the PCA on dorsal coloration of Podarcis liolepis lizards. (DOCX)
Article
Full-text available
Widespread species often show extensive phenotypic variation due to the contrasting abiotic and biotic factors that shape selective pressures in different environments. In this context, the gradual and predictable patterns of variation in climatic and environmental conditions found in mountain areas offer a great opportunity to explore intraspecifi...
Article
Full-text available
Many field studies of ecology or conservation require individual identification of the animals, and for this, several marking techniques have been developed. However, no specific labeling technique has been tested for fosso-rial reptiles, such as amphisbaenians. We describe the use of Passive Integrated Transponder (PIT) tags as a long-term labelin...
Presentation
Las señales sexuales dependientes de la condición han sido ampliamente estudiadas en el contexto de la comunicación animal. Muchos de estos estudios asumen que los machos con señales más atractivas serán los que más se reproduzcan, pero esto raramente se ha comprobado. Los machos de la lagartija carpetana (Iberolacerta cyreni) atraen a las hembras...
Poster
Los costes de producción de las señales sexuales de los machos, permiten que las hembras las consideren señales honestas indicadoras de la condición y la calidad del macho. En la lagartija carpetana (Iberolacerta cyreni), las características de las señales químicas (secreciones femorales) de los machos constituyen una señal honesta en el contexto d...
Presentation
Sexual signals that males produce to attract females may be honest if they are costly and dependent on the condition and quality of the male. In the Carpetan rock lizard (Iberolacerta cyreni), the characteristics of males' chemical signals (femoral secretions) may constitute an honest signal in the context of female mate choice. Those males able of...
Poster
Las señales sexuales químicas (secreciones femorales) usadas para marcar sustratos por los machos de lagartija carpetana (Iberolacerta cyreni) parecen tener un papel importante en la elección de pareja. Las hembras parecen evaluar la calidad de un macho a partir de las proporciones de dos formas de la provitamina D (cholesta-5,7-dien-3-ol y ergoste...
Article
Full-text available
Communicative traits are strikingly diverse and may vary among populations of the same species. Within a population, these traits may also display seasonal variation. Chemical signals play a key role in the communication of many taxa. However, we still know far too little about chemical communication in some vertebrate groups. In lizards, only a fe...
Article
Full-text available
Growth rates have complex sources and may determine adult body size in organisms with indeterminate growth. Thus, the interpretation of interpopulation differences in body size along geographical gradients requires the examination of growth and to distinguish between the proximal and ultimate causes of it. Several studies support a link between gro...
Article
Species whose geographical distribution encompasses both mainland and island populations provide ideal systems for examining potential isolation and genetic divergence. This has also interest from a conservationist point of view, as it is important to protect “evolutionarily significant units”. We report a phylogenetic mitochondrial DNA analysis co...
Article
Full-text available
Limbless animals that burrow head-first are often considered to be evolutionarily constrained in the development of a large head, due to limitations imposed while penetrating the soil. Whilst animals with a small head experience less resistance when digging, they are believed to have a weak bite, hence restricting their potential dietary spectrum t...
Article
Blood parasites such as haemogregarines and haemosporidians have been identified in almost all groups of vertebrates. However, very little is known about biodiversity of these parasites and their effects on some major groups of reptiles such as amphisbaenians, a distinctive group with many morphological and ecological adaptations to fossorial life....
Article
Full-text available
In this study, several species of Isospora infecting lizards were genetically characterized. Specifically, five described and four newly described species of Isospora were included in a phylogeny of the family Eimeriidae. These species were isolated from hosts originally inhabiting all geographic continents except Europe. Phylogenetic analyses of t...
Article
Sex-specific color polymorphisms have been extensively documented in many different taxa. When polymorphism in color pattern is restricted to females the condition is known as female-limited pattern polymorphism (FPP) which has been less commonly addressed in vertebrates. FPP is present in several lizards species but most research on lizards has fo...
Thesis
Full-text available
The study of natural variation has long fascinated evolutionary biologists and attempts to account for it were major contributors to the formulations of Darwin´s idea of evolution. The main goal of this thesis is to study the factors that shape phenotypic variation in the Iberian wall lizard species complex (P. hispanicus). We specifically focused...
Article
Many animals can recognize chemical cues of predators and show defensive responses, but antipredatory behavior can be costly and should be modulated depending on the level of risk posed by each predatory species. Recognition ability may be innate, but it is not clear whether there might also be local adaptation to predation pressure levels or some...
Article
Full-text available
Sexual signals used in intraspecific communication are expected to evolve to maximize efficacy under a given climatic condition. Thus, chemical secretions of lizards might evolve in the evolutionary time to ensure that signals are perfectly tuned to local humidity and temperature conditions affecting their volatility and therefore their persistence...
Article
Full-text available
Reptiles are the animals with the most described coccidian species among all vertebrates. However, the co-evolutionary relationships in this host–parasite system have been scarcely studied. Paperna & Landsberg (South African Journal of Zoology, 24, 1989, 345) proposed the independent evolutionary origin of the Eimeria-like species isolated from rep...
Article
Full-text available
Phylogeny of the reptilian Eimeria: are Choleoeimeria and Acroeimeria valid generic names?. — Zoologica Scripta, 00, 000–000. Reptiles are the animals with the most described coccidian species among all vertebrates. However, the co-evolutionary relationships in this host–parasite system have been scarcely studied. Paperna & Landsberg (South African...
Article
The two-fingered skink, Chalcides mauritanicus, is a fossorial species from North Africa, where it has only been found at a few localities in sandy sea shores. Virtually nothing is known about its ecology. For the first time, we report the occurrence of an apparently large and well-preserved population of C. mauritanicus at the Chafarinas Islands (...
Article
Full-text available
The interplay between ecological conditions and life histories has been widely acknowledged in vertebrates, particularly in lizards. Environmental conditions may exert different selective pressures and produce divergent phenotypes even in geographically and genetically close populations. The Iberian wall lizard, constitutes a perfect model organism...
Article
Full-text available
Foraging underground poses a number of important challenges for fossorial animals, such as amphisbaenians. For instance, visual detection and identification of prey is often hampered by low light conditions and poor eye sight. In response, many fossorial animals have switched to other sensory systems, such as chemoreception. We tested the ability o...
Article
Predation may have profound effects on prey animal phenotypes. Among the different traits considered, the relationship between coloration and antipredatory behaviour has been studied in depth in lizards. However, studies that address the relationships between dorsal patterns and tail coloration with escape behaviour in polymorphic lizards are absen...
Article
Morphological adaptations of amphisbaenians for a fossorial life constrain their ecological demands in a greater way than for epigeal reptiles. Studies on the diet of amphisbaenians suggest that most species are generalists, although others seem more selective. However, there is no information on the diet preferences of almost any species because m...
Article
Full-text available
Chemical signals have an important role in the reproductive behaviour of many lizards. However, the compounds secreted by their femoral or preanal glands, which may be used as sexual signals, are mainly known for lizard species within the Scleroglossa clade, whereas compounds in secretions of lizards within the Iguania clade are much less studied....
Article
Full-text available
Studies of diet suggest that skinks are opportunistic predators. However, there is little information on actual diet preferences because most studies do not evaluate the availability of prey in the environment. We analysed the diet selection of a population of the little-known skink Chalcides parallelus from the Chafarinas Islands in North Africa....

Questions

Question (1)
Question
Hey there!
I have a VCF file with roughly 8 million SNPs and I would like to calculate the significance of Fst per SNP in order to identify loci under selection between my different populations.
The idea is to use the HierFstat package to calculate Fst and then use the function boot.ppfst to test the significance of FST values (CI). By the way, how would you define the quantiles for bootstrapped CI? Default is quant=c(0.025,0.975)
I´ve seen similar questions here but since I´m specifically reading a VCF file with read.VCF that gives a dosage format, not fstat format so I´m a bit lost here...
I´ve tried the fs.dosage function but gives the overall Fst on a population basis, something I don´t need.
I any of you could provide some help I would be very glad :)
All the best,
Jesús

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Projects

Project (1)
Project
The main objective of this project is to analyze how the chemosensory ability to detect and identify chemical stimuli from the environment and chemical signals from conspecifics can allow fossorial reptiles (amphisbaenians) to cope with their ecological demands in the subterranean environment, and how these abilities influence the health state and the degree of conservation of the populations.