| helminth communities of the exotic introduced turtle, trachemys scripta elegans in southwestern spain: transmission from native turtles. | we report the prevalence and diversity of helminth parasites found in native turtles mauremys leprosa and emys orbicularis from three localities in southwestern spain and we describe the helminth communities of exotic turtles trachemys scripta elegans coexisting in the wild with both native turtle species. five nematodes species were identified, of which serpinema microcephalus was the only species common between two localities, although infection parameters were different between them. this is ... | 2009 | 18799176 |
| demonstrating the value and importance of combining dna barcodes and discriminant morphological characters for polystome taxonomy (platyhelminthes, monogenea). | polystomes are monogenean parasites that infest mainly semi aquatic vertebrates, such as amphibians and chelonians. owing to the lack of discriminative morphological characters and because polystomes are considered to be strictly host- and site-specific, host identity is often used as an additional character for parasite identification. recent genetic studies, however, showed that polystomes infecting freshwater turtles in outdoor turtle enclosures and natural environments, were not strictly hos ... | 2017 | 28336417 |
| first reported case of turtle deaths during a toxic microcystis spp. bloom in lake oubeira, algeria. | microcystins analysis was conducted in field cyanobacterial bloom samples and dead terrapin tissues from lake oubeira (algeria) with an aim of studying the cause of the mortality of the freshwater terrapin species emys orbicularis and mauremys leprosa during october 2005. the deaths of these two terrapin species were observed during a bloom of microcystis spp. the total microcystin content per phytoplankton biomass evaluated with the methanol extraction-protein phosphatase methodology was 1.12 m ... | 2008 | 18234335 |
| salmonella in free living terrestrial and aquatic turtles. | detection of salmonella in pet turtles has been the focus of extensive research, but its incidence in free living turtles is not well known. the aim of this study was to evaluate the incidence of salmonella in terrestrial and aquatic species of chelonians inhabiting a national park in southwestern spain. individuals of the terrestrial tortoise testudo graeca (n = 16) and the aquatic turtles emys orbicularis (n = 26) and mauremys leprosa (n = 50) were investigated. maximum incidence of salmonella ... | 2007 | 16979850 |
| falcaustra donanaensis sp. nov. (nematoda: kathlaniidae) a parasite of mauremys leprosa (testudines, bataguridae) in spain. | falcaustra donanaensis sp. nov. (nematoda, kathlaniidae) from the large intestine of mauremys leprosa (testudines, bataguridae) is described. by the absence of pseudosucker, arrangement of the male caudal papillae and the size of the spicules falcaustra donanaensis sp. nov. resembles only to falcaustra washingtonensis [bursey and aker (2001) j parasitol 87:1082-1084], a species from ambistoma tigrinum melanostictum in the nearctic region. papillae pattern in the male of f. washingtonensis is sim ... | 2006 | 16583203 |
| sexually dichromatic coloration reflects size and immunocompetence in female spanish terrapins, mauremys leprosa. | many studies have shown the importance of colorful ornamentation in mate choosiness or intrasexual conflict. however, research on color ornaments has focused mainly on birds, lizards or fish, but remains practically unknown in other animal groups such as turtles. in addition, female ornaments and their relation with sexual selection also remain almost unknown. here, we measured the coloration of the shell and the limb stripes of male and female spanish terrapins mauremys leprosa and explored the ... | 2013 | 24253419 |
| [graft of the infantile gonads of the tortoise, emys leprosa s., on the chick embryo]. | | 1962 | 13980934 |
| [neurosecretion in the water turtle, emys leprosa schw., after thyroidectomy and thyroxin injections]. | | 1961 | 13684437 |
| [action of gonadotropic hormones on the infantile testicle of young water turtles, emys leprosa s]. | | 1961 | 13916511 |
| [neurosecretory manifestations observed in the female fresh-water tortoise, emys leprosa schw., at the beginning of puberty]. | | 1961 | 13880748 |
| [neurosecretion in the fresh-water tortoise emys leprosa schw, after destruction of the pineal body region]. | | 1960 | 13684436 |
| [exophthalmos of the water turtle emys leprosa schw. induced by the destruction of the epiphysial region]. | | 1960 | 13794450 |
| [thyrostimulation and sexual repose after the destruction of the epiphyseal region in emys leprosa schw]. | | 1960 | 24545401 |
| [reaction of the undifferentiated muller's ducts of young males of emys leprosa s. to the action of androstenediol dipropionate]. | | 1959 | 13833995 |
| [effects of hypophysectomy on the formed elements of the blood and on the serum protein equilibrium in teh water tortoise emys leprosa schw]. | | 1959 | 13794448 |
| [preliminary study on the effect of some estrogens and androgens on the genital tract of the young water tortoise, emys leprosa s]. | | 2016 | 13559784 |
| [action of chorionic gonadotropin on the testis of the freshwater tortoise emys leprosa schw]. | | 1958 | 13619179 |
| [feminization of young gonads of male turtle emys leprosa by diethylstilbestrol]. | | 1958 | 13597371 |
| [stimulating action of androgens on female rudiments of the female genitalia in emys leprosa s]. | | 1956 | 13397098 |
| [effects of various corticosteroids on isolated heart of clemmys leprosa]. | | 2008 | 13255249 |
| [histophysiological data on the oviducts of the algerian water turtle (emys leprosa)]. | | 1955 | 14390840 |
| [male sexual cycle, especially spermatogenesis in the algerian fresh-water tortoise (emys leprosa schw.)]. | | 1954 | 14379570 |
| [histological effects of cortisone and desoxycorticosterone on the heart of clemmys leprosa]. | | 1954 | 13173864 |
| reproductive state affects hiding behaviour under risk of predation but not exploratory activity of female spanish terrapins. | female investment during reproduction may reduce survivorship due to increased predation risk. during pregnancy, the locomotor performance of gravid females might be diminished due to the additional weight acquired. in addition, egg production may also increase thermoregulatory, metabolic and physiological costs. also, pregnant females have greater potential fitness and should take fewer risks. thus, females should ponder their reproductive state when considering their behavioural responses unde ... | 2015 | 25528131 |
| prevalence and genetic diversity of blood parasite mixed infections in spanish terrapins, mauremys leprosa. | blood parasites such as haemogregarines and haemosporidians have been identified in almost all groups of vertebrates and may cause serious damages to their hosts. however, very little is known about biodiversity of these parasites and their effects on some groups of reptiles such as terrapins. moreover, the information on virulence from blood parasites mixed infection is largely unknown in reptiles. with this aim, we investigated for the first time the prevalence and genetic diversity of blood p ... | 2017 | 28641604 |
| haemogregarines from western palaearctic freshwater turtles (genera emys, mauremys) are conspecific with haemogregarina stepanowi danilewsky, 1885. | the majority of haemogregarina species have been based on the morphology of their erythrocytic stages and supposed strict host specificity. the quantity of species with a limited number of overlapping diagnostic traits has led to a considerable mess in haemogregarine taxonomy and significant synonymy. we analysed host specificity, intra- and interspecific variability, evolutionary relationships, and the distribution of the type species of the genus haemogregarina--h. stepanowi. the morphology of ... | 2014 | 24476992 |
| presence of the leech placobdella costata in the south of the iberian peninsula. | placobdella costata is a leech specific to freshwater turtle emys orbicularis. both genera are native to north america and have co-evolved and undergone dispersion through the palearctic. the leech is present throughout the mediterranean area, always associated with e. orbicularis. their only known presence in the iberian peninsula is in the north and center of the peninsula. here we present the first description of the leech in southern spain (andalusia) in association with a small fragmented p ... | 2014 | 24827095 |
| distribution of glial fibrillary acidic protein-immunopositive structures in the developing brain of the turtle mauremys leprosa. | this study is a continuation of the description of the glial fibrillary acidic protein (gfap)-immunopositive structures in the adult turtle brain (kálmán et al. 1994) and presents a comprehensive description of the development of these structures from the 20th embryonic day (e20) to the adult age. gfap-immunopositive elements were first detected at e28 and by e34 the gfap-immunopositivity was apparent throughout the brain, except the cerebellum. the appearance of gfap seemed to be related to the ... | 1997 | 9242888 |
| developmental changes in the fibre population of the optic nerve follow an avian/mammalian-like pattern in the turtle mauremys leprosa. | the changes in the axon and growth cone numbers in the optic nerve of the freshwater turtle mauremys leprosa were studied by electron microscopy from the embryonic day 14 (e14) to e80, when the animals normally hatch, and from the first postnatal day (p0) to adulthood (5 years on). at e16, the first axons appeared in the optic nerve and were added slowly until e21. from e21, the fibre number increased rapidly, peaking at e34 (570,000 fibres). thereafter, the axon number decreased sharply, and fr ... | 2006 | 16935267 |
| early development of the optic nerve in the turtle mauremys leprosa. | we show the distribution of the neural and non-neural elements in the early development of the optic nerve in the freshwater turtle, mauremys leprosa, using light and electron microscopy. the first optic axons invaded the ventral periphery of the optic stalk in close relationship to the radial neuroepithelial processes. growth cones were thus exclusively located in the ventral margin. as development progressed, growth cones were present in ventral and dorsal regions, including the dorsal periphe ... | 2007 | 17258694 |
| hematologic and biochemical reference intervals of free-living mediterranean pond turtles (mauremys leprosa). | reference intervals of hematologic and biochemical blood profiles were obtained from 56 male and 58 female mediterranean pond turtles (mauremys leprosa) captured from the wild in different periods of their annual cycle. mean (or median in nonnormal distributions) values of leukocyte differential were 53.8% and 58.5% heterophils, 35.3% and 32.6% eosinophils, 6.3% and 5.8% lymphocytes, 4.3% and 2% monocytes, and 0% and 0% basophils in males and females, respectively. biochemical values did not dif ... | 2007 | 17984284 |
| changes in fiber arrangement in the retinofugal pathway of the turtle mauremys leprosa: an evolutionarily conserved mechanism. | in spite of the numerous reports on the optic fiber distribution in the optic nerve and tract of vertebrates, there have been few studies of the visual pathway in reptiles. the arrangement of fibers in the optic nerve and tract of the turtle mauremys leprosa was studied by placing a small granule of carbocyanine dye (dii or dia) in one of the four quadrants of the retina. the labeled fibers were traced through transverse sections of the retinofugal pathway with confocal microscopy. retinal axons ... | 2007 | 17996220 |
| is sexual body shape dimorphism consistent in aquatic and terrestrial chelonians? | comparisons between aquatic and terrestrial species provide an opportunity to examine how sex-specific adaptations interact with the environment to influence body shape. in terrestrial female tortoises, selection for fecundity favors the development of a large internal abdominal cavity to accommodate the clutch; in conspecific males, sexual selection favors mobility with large openings in the shell. to examine to what extent such trends apply in aquatic chelonians we compared the body shape of m ... | 2010 | 20832271 |
| risk of pesticide exposure for reptile species in the european union. | environmental pollution has an especially high impact on wildlife. this is especially the case in industrialized countries. although, many species within the european union benefit from protection by the habitats directive, no special consideration is given to possible detrimental effects of pesticides. this is in particular remarkable as negative effects, which may lead to a regional diversity loss, have already been identified in laboratory and mesocosm studies. we conducted a pesticide exposu ... | 2016 | 27182977 |
| the high resolution melting analysis (hrm) as a molecular tool for monitoring parasites of the wildlife. | in an interconnected world, the international pet trade on wild animals is becoming increasingly important. as a consequence, non-native parasite species are introduced, which affect the health of wildlife and contribute to the loss of biodiversity. because the investigation of parasite diversity within vulnerable host species implies the molecular identification of large samples of parasite eggs, the sequencing of dna barcodes is time-consuming and costly. thereby, the objectives of our study w ... | 2017 | 27938420 |
| oxidative stress biomarkers in the mediterranean pond turtle (mauremys leprosa) reveal contrasted aquatic environments in southern france. | increasing anthropogenic activities, like agricultural practices, constitute the main causes of the loss of water quality and disruption of freshwater ecosystems. high concentrations of pesticides, as shown under experimental conditions, can indeed impact freshwater animals. in southern france, especially in the pyrénées-orientales department, because agricultural activities are mainly based on fruit crops and vineyards, glyphosate and ampa were detected in some watercourses. thereby we investig ... | 2017 | 28554017 |
| influence of a former mining area in the heavy metals concentrations in blood of free-living mediterranean pond turtles (mauremys leprosa). | the objective of this study was to assess metal exposure in the mediterranean pond turtle (mauremys leprosa) inhabiting a watercourse in an ancient mining district polluted by different metals ("rambla de las moreras", southeastern spain) and included in the ramsar convention. for this purpose, mercury (hg), lead (pb), copper (cu), zinc (zn) and cadmium (cd) were analysed in blood samples from 42 m. leprosa healthy adults (27 males and 13 females). the highest median concentrations were found fo ... | 2017 | 28597086 |
| oxidative stress induced by glyphosate-based herbicide on freshwater turtles. | freshwater ecosystems face very strong anthropogenic pressures, among which overexploitation, habitat degradation, flow modification, species invasion, and water pollution lead to growing threats on biodiversity. urbanization through wastewater treatment, industry through the release of inorganic and organic chemicals, and agriculture through the use of pesticides and herbicides are the main factors involved in water pollution. in france, more precisely in the pyrénées-orientales department, the ... | 2017 | 28833383 |
| giant-cell arteritis in a chelonian (clemmys leprosa). | severe giant-cell arteritis in a spanish terrapin (clemmys leprosa) led to the death of the animal when haemopericardium supervened. since only 2 previous cases, both in chelonians with an abnormal presentation of giant cells have been reported, it is suggested that the macrophage system of the chelonians may repay particular attention. | 1983 | 6643761 |
| formation of cartilage in the heart of the spanish terrapin, mauremys leprosa (reptilia, chelonia). | cartilaginous deposits are regularly present in the heart of several reptilian, avian, and mammalian species. the formation of these extraskeletal cartilages has been studied in birds and mammals, but not in reptiles. the aim here was to elucidate this question in the spanish terrapin. hearts from 23 embryos belonging to yntema (1968) developmental stages 17 to 26 and eight terrapins age 3 months to 10 years were examined using histological, histochemical, and immunohistochemical techniques. in ... | 2003 | 12905537 |
| chemo-orientation using conspecific chemical cues in the stripe-necked terrapin (mauremys leprosa). | although chemical communication has been studied intensively in may reptilian species, little attention has been paid to the role that chemical signals play in aquatic reptiles, such as freshwater turtles. here, i tested the hypothesis that the stripe-necked terrapin (mauremys leprosa), an abundant freshwater turtle that inhabits the iberian peninsula, is able to recognize chemical cues from conspecifics in the water and to modify its behavior in response to such cues. i compared the time spent ... | 2004 | 15139305 |
| feeding status and basking requirements of freshwater turtles in an invasion context. | thermoregulatory behavior and feeding status are strongly related in ectotherms. a trade-off between maintenance of energy balance and digestion efficiency has been recently proposed to affect thermoregulation in these animals. on the other hand, competition for basking sites has been described between iberian turtles and the introduced red-eared slider (trachemys scripta elegans). t. scripta negatively interferes with basking behavior of native turtles and benefits from a greater capacity to re ... | 2012 | 22226990 |
| effects of body temperature on righting performance of native and invasive freshwater turtles: consequences for competition. | righting behavior of aquatic turtles might be subject to coadaptation pressures between preferred basking temperature and locomotion, given that it is mainly performed on land and may critically determine the survival of turtles. we analyzed the effect of body temperature (t(b)) on righting performance of two species of freshwater turtles, the endangered native spanish terrapin (mauremys leprosa), and the red-eared slider (trachemys scripta elegans), an introduced invasive species that is displa ... | 2012 | 23058848 |
| tools for non-invasive sampling of metal accumulation and its effects in mediterranean pond turtle populations inhabiting mining areas. | among reptiles, freshwater turtle species have high potential for metal accumulation because of their long lifespan or their aquatic and terrestrial habits. in order to monitor metal bioaccumulation, determine potential toxic effects, and investigate tools for non-invasive metal sampling in reptiles, we studied lead (pb) and mercury (hg) accumulation in mediterranean pond turtles (mauremys leprosa) inhabiting two former mining areas, one of them with high environmental concentrations of pb (sier ... | 2019 | 31129400 |
| invasive species threat: parasite phylogenetics reveals patterns and processes of host-switching between non-native and native captive freshwater turtles. | one of the major threats to biodiversity involves biological invasions with direct consequences on the stability of ecosystems. in this context, the role of parasites is not negligible as it may enhance the success of invaders. the red-eared slider, trachemys scripta elegans, has been globally considered among the worst invasive species. since its introduction through the pet trade, t. s. elegans is now widespread and represents a threat for indigenous species. because t. s. elegans coexists wit ... | 2011 | 21767431 |
| [radiosensitivity of the male genital gland of the puberal tortoise emys leprosa]. | | 1967 | 4234309 |
| [castration of the water tortoise emys leprosa schw]. | | 1964 | 14289110 |
| [histophysiology of the epiphysis in the fresh-water turtle, emys leprosa (schw)]. | | 2016 | 14022486 |
| the chemistry and histology of sexually dimorphic mental glands in the freshwater turtle, mauremys leprosa. | despite evidence from anatomy, behavior and genomics indicating that the sense of smell in turtles is important, our understanding of chemical communication in this group is still rudimentary. our aim was to describe the microanatomy of mental glands (mgs) in a freshwater turtle, mauremys leprosa (geoemydidae), and to assess the chemical composition of their secretions with respect to variation among individuals and between sexes. mgs are paired sac-like organs on the gular region of the neck an ... | 2020 | 32461828 |
| phylin 2.0: extending the phylogeographical interpolation method to include uncertainty and user-defined distance metrics. | estimating geographical ranges of intra-specific evolutionary lineages is crucial to the fields of biogeography, evolution, and biodiversity conservation. models of isolation mechanisms often consider multiple distances in order to explain genetic divergence. yet, the available methods to estimate the geographical ranges of lineages are based on direct geographical distances, neglecting other distance metrics that can better explain the spatial genetic structure. we extended the phylogeographica ... | 2019 | 30873736 |
| morphological and physiological assessments reveal that freshwater turtle (mauremys leprosa) can flourish under extremely degraded-polluted conditions. | freshwater turtles are long-lived sedentary organisms used as biological sentinels to assess anthropogenic perturbations in freshwater-ecosystems; notably because pollutants tend to accumulate in their tissues. pollution has detrimental effects in sea turtles, but studies in freshwater turtles have provided contrasted results: several species have been impacted by habitat perturbation and pollution while others not. it is important to explore this issue since freshwater turtles are threatened wo ... | 2019 | 30594794 |
| the genetic diversity of blood parasites within the freshwater turtles mauremys leprosa and emys orbicularis in tunisia reveals coinfection with haemogregarina spp. | haemogregarina species are apicomplexan blood parasites infecting vertebrates such as fish, lizards, and turtles. due to the high morphological similarity of the erythrocytic stages infecting host species, it has always been a challenge to identify the true diversity of these parasites. therefore, taxonomic studies are presently based on the combination of morphological and molecular data. in tunisia, two species of haemogregarina have been reported within the freshwater turtle mauremys leprosa ... | 2020 | 32699938 |
| host-parasite association of placobdella costata (glossiphoniidae: hirudinea) and mauremys leprosa (geoemydidae: testudinoidea) in aquatic ecosystems of morocco. | emys orbicularis (linnaeus, 1758) was considered as a specific host of placobdella costata (fr. mûller, 1846). however, since the parasite was recorded from outside the distribution area of its host, some authors suggested a possible relationship with other hosts. although two accidental associations were found with another turtle, mauremys leprosa (schweigger, 1812), the obtained data remain insufficient to better understand this discovered host-parasite ecological system. in this context, the ... | 2020 | 32677002 |
| freshwater turtles reveal personality traits in their antipredatory behaviour. | animals respond to predation risk with antipredatory behaviours that may disclose the presence of different personality traits among individuals in a population, and how populations may differ for the expression of those traits. variation among individuals is a necessary condition for the evolution through natural selection and inter-individual behavioural differences may be selected in different environmental situations. we tested whether individuals of two freshwater turtle species, emys orbic ... | 2018 | 30157465 |