Juan Carlos Illera

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The blue tit (Parus caeruleus teneriffae group) is proposed to have colonised the Canary Islands from North Africa according to an east-to-west stepping stone model, and today, the species group is divided into four subspecies, differing in morphological, acoustic, and ecological characters. This colonisation hypothesis was tested and the population(More)
Inflammatory mammary carcinoma (IMC) is the most aggressive spontaneous type of mammary malignant tumor both in women and dogs. Latest studies in dogs indicate that different endocrine mechanisms seem to be involved in inflammatory carcinomas (IMCs). The aim of the present study was to characterize the steroid hormone profile of inflammatory carcinoma, and(More)
Population bottlenecks can restrict variation at functional genes, reducing the ability of populations to adapt to new and changing environments. Understanding how populations generate adaptive genetic variation following bottlenecks is therefore central to evolutionary biology. Genes of the major histocompatibility complex (MHC) are ideal models for(More)
The fauna of oceanic islands provide exceptional models with which to examine patterns of dispersal, isolation and diversification, from incipient speciation to species level radiations. Here, we investigate recent differentiation and microevolutionary change in Berthelot's pipit (Anthus berthelotii), an endemic bird species inhabiting three Atlantic(More)
This study was carried out to identify the possible effects of epidermal growth factor (EGF) and insulin-like growth factor-I (IGF-I) on cumulus expansion and nuclear maturation in bovine oocytes matured in vitro in serum-free media. Bovine follicular oocytes were matured in vitro and were then classified as cumulus cell-enclosed oocytes or denuded oocytes.(More)
Quaternary climatic oscillations have been considered decisive in shaping much of the phylogeographic structure around the Mediterranean Basin. Within this paradigm, peripheral islands are usually considered as the endpoints of the colonization processes. Here, we use nuclear and mitochondrial markers to investigate the phylogeography of the blue tit(More)
The determination of gender in wild animals is essential for behavioural and ecological studies, and also for conservation. The objectives of this study were (i) the determination of gender in faecal samples of Iberian wolf based on the differential concentrations of sexual steroid hormones (SSH) and (ii) to analyse the profiles of SSH in males and females(More)
A rapid, sensitive enzymeimmunoassay for the measurement of LH concentrations in serum and peritoneal fluid samples of healthy women and women with endometriosis is reported. The ligand (LH) was captured by a readily available, widely used and well-characterized monoclonal antibody (mAb, 518B7) generated against the beta subunit of bovine LH. This mAb,(More)
The aims of this study were to investigate the serum and tissue content of androgens and estrogens in canine inflammatory mammary carcinomas (IMC) as well as in non-inflammatory malignant mammary tumors (MMT), and assessed the immunoexpression of estrogen and androgen receptors using immunohistochemistry. Profiles for the androgens dehydroepiandrosterone(More)
In several animal studies, prolactin has been found to be essential for mammary epithelial development, and its administration has been consistently shown to increase the rate of mammary tumours. High levels of steroid hormones have also been suggested to enhance mammary cancer development. The present study investigates the levels of the following hormones(More)