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Автор: Grafiati
Опубліковано: 13 березня 2024

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1

Romero, David, José C. Báez, Francisco Ferri-Yáñez, Jesús J. Bellido, and Raimundo Real. "Modelling Favourability for Invasive Species Encroachment to Identify Areas of Native Species Vulnerability." Scientific World Journal 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/519710.

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We assessed the vulnerability of the native Mediterranean pond turtle to encroachment by the invasive red-eared slider in southern Spain. We first obtained an ecogeographical favourability model for the Mediterranean pond turtle. We then modelled the presence/absence of the red-eared slider in the Mediterranean pond turtle range and obtained an encroachment favourability model. We also obtained a favourability model for the red-eared slider using the ecogeographical favourability for the Mediterranean pond turtle as a predictor. When favourability for the Mediterranean pond turtle was high, favourability for the red-eared slider was low, suggesting that in these areas the Mediterranean pond turtle may resist encroachment by the red-eared slider. We also calculated favourability overlap between the two species, which is their simultaneous favourability. Grids with low overlap had higher favourability values for the Mediterranean pond turtle and, consequently, were of lesser conservation concern. A few grids had high values for both species, being potentially suitable for coexistence. Grids with intermediate overlap had similar intermediate favourability values for both species and were therefore areas where the Mediterranean pond turtle was more vulnerable to encroachment by the red-eared slider. We mapped the favourability overlap to provide a map of vulnerability of the Mediterranean pond turtle to encroachment by the red-eared slider.
2

Verneau, Olivier, Sirine Melliti, Latifa Kimdil, El Hassan El Mouden, Mohamed Sghaier Achouri, and Rachid Rouag. "Molecular Phylogenies of Leeches and Haemoparasites Infecting Freshwater Turtles in Aquatic Ecosystems of Northern Africa Suggest Phylogenetic Congruence between Placobdella costata Sensu Lato and Haemogregarina stepanowi Sensu Lato." Microorganisms 11, no. 6 (June 15, 2023): 1584. http://dx.doi.org/10.3390/microorganisms11061584.

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Haemogregarines are blood parasites with a life-cycle involving a vertebrate as the intermediate host and an invertebrate as the definitive host and vector. Extensive phylogenetic investigations based on 18S-rRNA gene sequences have shown that Haemogregarina stepanowi (Apicomplexa: Haemogregarinidae) is able to infest a large diversity of freshwater turtle species, including the European pond turtle Emys orbicularis, the Sicilian pond turtle Emys trinacris, the Caspian turtle Mauremys caspica, the Mediterranean pond turtle Mauremys leprosa, and the Western Caspian turtle Mauremys rivulata, among others. From the same molecular markers, H. stepanowi is further considered to be a complex of cryptic species predisposed to infect the same host species. While Placobdella costata is known to be the unique vector of H. stepanowi, it is only recently that independent lineages within P. costata have been illustrated—suggesting the presence of at least five unique leech species across Western Europe. The aims of our study were therefore to investigate from mitochondrial markers (COI) the genetic diversity within haemogregarines and leeches infecting freshwater turtles of the Maghreb, in order to identify processes of parasite speciation. We showed that H. stepanowi consists of at least five cryptic species in the Maghreb, while two Placobella species were identified in the same area. Although an Eastern–Western speciation pattern was apparent for both leeches and haemogregarines, we cannot make definitive conclusions regarding co-speciation patterns between parasites and vectors. However, we cannot reject the hypothesis of a very strict host–parasite specificity within leeches.
3

Vignoli, Leonardo, Marco A. Bologna, Silvia Manzini, Lorenzo Rugiero, and Luca Luiselli. "Attributes of basking sites of the European pond turtle (Emys orbicularis) in central Italy." Amphibia-Reptilia 36, no. 2 (2015): 125–31. http://dx.doi.org/10.1163/15685381-00002988.

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Attributes of basking sites are important elements to study in management plans of threatened freshwater turtles. Here, we analyzed the basking-site characteristics of European pond turtle (Emys orbicularis) populations in a Mediterranean territory of central Italy (Tolfa Mountains, Latium). We used logistic regression and Principal Components Analysis to characterize 29 presence sites versus 61 random sites, through 16 descriptive variables recorded within a 5 m radius from the sighting/target spot. Our analyses revealed that some variables (i.e. water turbidity, presence of small coves, submerged vegetation, and emergent tree-trunks) were those that influenced most strongly the presence of turtles on potential basking sites. Maintenance of deadwood in water and preservation of submerged aquatic vegetation should be included in the management planning for this turtle species in central Italy.
4

Valenzuela, Alejandro, Miguel Ángel Cau, and Josep Antoni Alcover. "Archaeological evidence for the introduction of Emys orbicularis (Testudines: Emydidae) in the Balearic Islands, Western Mediterranean." Amphibia-Reptilia 37, no. 2 (2016): 229–36. http://dx.doi.org/10.1163/15685381-00003049.

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Among the different anthropogenic processes that affected the current distribution of the European pond turtle (Emys orbicularis), the timing of the human-mediated translocations is rarely known. Here we present data derived from an archaeological specimen ofE. orbicularisobtained at the Roman site of Pollentia (Mallorca, Balearic Islands) using direct radiocarbon dating. These remains correspond to the early Roman period and represent the first reliable evidence for the ancient introduction of this turtle species in a Western Mediterranean Island.
5

Poch Cartañá, Santiago. "Nocturnal winter activity of the Mediterranean Pond Turtle (Mauremys leprosa)." Reptiles & Amphibians 29, no. 1 (July 4, 2022): 296–97. http://dx.doi.org/10.17161/randa.v29i1.16583.

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6

Velo-Antón, Guillermo, Paulo Pereira, Soumia Fahd, José Teixeira, and Uwe Fritz. "Out of Africa: did Emys orbicularis occidentalis cross the Strait of Gibraltar twice?" Amphibia-Reptilia 36, no. 2 (2015): 133–40. http://dx.doi.org/10.1163/15685381-00002989.

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The narrow Strait of Gibraltar has separated the African and European continents since the Miocene (5.3 Mya), with a different degree of permeability for Mediterranean taxa. Southern and northern regions of the Iberian Peninsula and Morocco, respectively, are key areas to evaluate the colonization dynamics and biogeographic history of taxa occurring at both sides of this strait. The Ibero-Maghrebian subspecies of the European pond turtle, Emys orbicularis occidentalis, is patchily distributed and threatened throughout most of the Iberian Peninsula and northern Morocco and its origin is thought to be in North Africa. Here we expand the geographic sampling across the Iberian Peninsula and Morocco, with special emphasis in the southern tip of the peninsula and northern Morocco, and analyze mtDNA sequences of 183 E. o. occidentalis to better understand the complex biogeographic history of this subspecies. We provide for the first time evidence for shared haplotypes of Iberian and North African pond turtles, with an additional haplotype in the southern Iberian Peninsula derived from Moroccan haplotypes. This supports the hypothesis that the Strait of Gibraltar constitutes no significant biogeographic barrier for E. orbicularis. However, the newly discovered shared, or extremely similar, haplotypes of European pond turtles from the southern Iberian Peninsula and Morocco suggest either that at least two independent natural colonization waves from Morocco have reached the Iberian Peninsula or that Moroccan turtles were accidentally or deliberately introduced there.
7

Figueres, Jesus Muro. "Treatment of Articular Gout in a Mediterranean Pond Turtle, Mauremys leprosa." Bulletin of the Association of Reptilian and Amphibian Veterinarians 7, no. 4 (January 1997): 5–8. http://dx.doi.org/10.5818/1076-3139.7.4.5.

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8

Perpiñán, David, and Carmen Sánchez. "Morphologic and Cytochemical Characteristics of Blood Cells from the European Pond Turtle (Emys orbicularis) and the Mediterranean Pond Turtle (Mauremys leprosa)." Journal of Herpetological Medicine and Surgery 19, no. 4 (December 1, 2009): 119. http://dx.doi.org/10.5818/1529-9651-19.4.119.

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9

Détaint, Mathieu, Anthony Olivier, Marc Cheylan, Christophe Coïc, Uwe Fritz, Daniela Guicking, Antoine Cadi, et al. "Distribution of mtDNA haplotypes (cyt b) of Emys orbicularis in France and implications for postglacial recolonization." Amphibia-Reptilia 26, no. 2 (2005): 231–38. http://dx.doi.org/10.1163/1568538054253393.

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AbstractThe European pond turtle, Emys orbicularis, is a wide ranging species, distributed from Northwest Africa over a large part of Europe and Asia Minor to the Caspian and Aral Seas. For 106 pond turtles from France mtDNA sequence variation has been assessed, using a 1031 bp portion of the mitochondrial cytochrome b gene. Three of nine haploclades currently known from the entire species' range were found in France. One clade (II) is represented with four very similar haplotypes, differing by one mutation, and the two other clades (V, VI) are represented with one haplotype each. A syntopic occurrence of clades II and V is reported for the first time for the Camargue. Besides, clade II occurs in the French regions Aquitaine, Centre-Val de Loire, and Rhône-Alpes. Outside of France, it is found mainly in the catchment areas of the Danube and Oder rivers and in the Balkans. Haploclade V, which is also known from the Apennine peninsula, Sardinia, and the northern Mediterranean coast of Spain, is restricted in France to Corsica and the Provence-Alpes-Côte d'Azur region. A single individual bearing a haplotype of an Iberian and North African clade (VI) was found in Aquitaine near Pau. This could indicate gene flow between the Iberian peninsula and West France, if the specimen is native. The distribution of the distinct haploclades in France probably reflects Holocene range expansions, especially of haploclade II turtles. In the postglacial, haploclade II terrapins arrived from the east and spread over the Rhône corridor to the Mediterranean coast. In the southern Rhône area they met and hybridized with haploclade V turtles. Further research is needed to clarify whether this hybridization is a locally restricted phenomenon.
10

Loulida, Soumia, Pedro Segurado, Mohamed Naimi, and Mohammed Znari. "Niche differentiation among genetic lineages in the Mediterranean Pond turtle, Mauremys leprosa, across its geographical range." Amphibia-Reptilia 42, no. 2 (March 4, 2021): 227–40. http://dx.doi.org/10.1163/15685381-bja10049.

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Abstract Ecological niche modelling provides a useful tool to measure niche properties such as niche breadth, niche overlap and niche conservatism among genetic lineages, with relevant implications for conservation. The Mediterranean pond turtle Mauremys leprosa occurs on both sides of the Strait of Gibraltar over most Iberia and the Maghreb Region of north-western Africa, where it shows a complex genetic structure as the result of Pleistocene climatic oscillations and the particular geographical features of this region. We analyzed the overlap of the climate niche of genetic lineages and sublineages of Mauremys leprosa, based on confirmed records across the known geographical range of the species. We also compared the accuracy of environmental niche models obtained by splitting the two lineages into subunits and lumping across lineages. Results revealed an overall niche overlap between the two main lineages and among most sublineages, indicating no relationship between genetic variation and niche divergence. Likewise, the environmental niche modelling revealed an extensive geographical overlap of climatic suitability between the two lineages. However, some ecological differentiation occurs for some sublineage pairs, in particular involving a sublineage whose occurrence corresponds to a particular morphotype – the Sahara blue-eyed pond turtle – which occupies very isolated habitats along the Draa basin in Morocco. These populations are currently threatened by fragmentation of habitats, drought and water salinization. This study will help assessing more effectively the impacts of ongoing climate change on Mauremys leprosa that along with local human activities are likely to increase in the southernmost limit of its distribution.
11

Héritier, Laurent, Anne-Leila Meistertzheim, and Olivier Verneau. "Oxidative stress biomarkers in the Mediterranean pond turtle ( Mauremys leprosa ) reveal contrasted aquatic environments in Southern France." Chemosphere 183 (September 2017): 332–38. http://dx.doi.org/10.1016/j.chemosphere.2017.05.116.

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12

Escoriza, Daniel, Santiago Poch, and Dani Boix. "Morphological variation of the European Pond Turtle, Emys orbicularis (Linnaeus 1758), on the island of Menorca." Reptiles & Amphibians 31, no. 1 (January 6, 2024): e20599. http://dx.doi.org/10.17161/randa.v31i1.20599.

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The European Pond Turtle (Emys orbicularis) is a widely distributed species in Menorca (Balearic Islands,western Mediterranean) and it likely was introduced in historical times. In this study, we evaluated sexual dimorphismand morphological variation of E. orbicularis on the island from a sample of 455 individuals captured at ten surveysites. In these individuals, we measured seven linear traits related to body size. In addition, we measured two shapedescriptors (carapace and plastron shape) and iris and plastral coloration. The results showed very pronounced sexualdimorphism, with females being larger than males and also having longer and broader plastra with higher carapaces.The site of capture had significant effects on carapace, plastral shape, and coloration. Both males and females had darkorlight-colored plastra, but some males had almost completely dark plastra (to 99% dark), whereas in females, themaximum extent of black plastra was lower (79%). The sexes also differed in iridal chromatic attributes, with femalesmore frequently having yellow and males having red or orange irises. However, this was not diagnostic of sexual identity,as 13% of females had red irises and 15% of males had yellow irises.
13

Iannella, Mattia, Francesco Cerasoli, Paola D’Alessandro, Giulia Console, and Maurizio Biondi. "Coupling GIS spatial analysis and Ensemble Niche Modelling to investigate climate change-related threats to the Sicilian pond turtle Emys trinacris, an endangered species from the Mediterranean." PeerJ 6 (June 5, 2018): e4969. http://dx.doi.org/10.7717/peerj.4969.

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The pond turtle Emys trinacris is an endangered endemic species of Sicily showing a fragmented distribution throughout the main island. In this study, we applied “Ensemble Niche Modelling”, combining more classical statistical techniques as Generalized Linear Models and Multivariate Adaptive Regression Splines with machine-learning approaches as Boosted Regression Trees and Maxent, to model the potential distribution of the species under current and future climatic conditions. Moreover, a “gap analysis” performed on both the species’ presence sites and the predictions from the Ensemble Models is proposed to integrate outputs from these models, in order to assess the conservation status of this threatened species in the context of biodiversity management. For this aim, four “Representative Concentration Pathways”, corresponding to different greenhouse gases emissions trajectories were considered to project the obtained models to both 2050 and 2070. Areas lost, gained or remaining stable for the target species in the projected models were calculated. E. trinacris’ potential distribution resulted to be significantly dependent upon precipitation-linked variables, mainly precipitation of wettest and coldest quarter. Future negative effects for the conservation of this species, because of more unstable precipitation patterns and extreme meteorological events, emerged from our analyses. Further, the sites currently inhabited by E. trinacris are, for more than a half, out of the Protected Areas network, highlighting an inadequate management of the species by the authorities responsible for its protection. Our results, therefore, suggest that in the next future the Sicilian pond turtle will need the utmost attention by the scientific community to avoid the imminent risk of extinction. Finally, the gap analysis performed in GIS environment resulted to be a very informative post-modeling technique, potentially applicable to the management of species at risk and to Protected Areas’ planning in many contexts.
14

Ortiz-Santaliestra, Manuel E., Antonio Rodríguez, Jennifer Pareja-Carrera, Rafael Mateo, and Mónica Martinez-Haro. "Tools for non-invasive sampling of metal accumulation and its effects in Mediterranean pond turtle populations inhabiting mining areas." Chemosphere 231 (September 2019): 194–206. http://dx.doi.org/10.1016/j.chemosphere.2019.05.082.

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15

Naimi, Mohamed, Mohammed Znari, Soumia Loulida, Moulay Abdeljalil AitBaamrane, and Jeffrey Edward Lovich. "Sexual Cycle of the Mediterranean Pond Turtle, <i>Mauremys leprosa</i> (Testudines: Geoemydidae) in West Central Morocco." Russian Journal of Herpetology 31, no. 1 (February 29, 2024): 7–13. http://dx.doi.org/10.30906/1026-2296-2024-31-1-7-13.

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We studied the reproductive cycle of male and female Mauremys leprosa in central Morocco. The cycle for males starts in the spring with warming temperatures and the beginning of the dry-season with testicular enlargement and a decrease in epididimydes size accompanied by sperm production. The epididymis contains sperm mainly in winter, spring and summer. Females exhibited follicular enlargement from November reaching a peak in February when a maximum follicle size of 38.5 mm was observed. Ovulation appears to begin in April or May and oviductal eggs were present in our samples from April – July. Suspected mating activity occurred from January – March when environmental temperatures were lowest and the wet-season peaked. Sexual activity was coincident with the onset of maximum storage of sperm in the epididymis. The overall reproductive cycle of this species is similar to that of other Temperate Zone turtles with the exception that mating occurs in the winter, not in the spring and fall. Winter mating may be a response to the wet-season Mediterranean climates. Rain connects isolated pools in ephemeral rivers and streams in Morocco that form during the dry season, thus providing greater opportunities for access to mates.
16

Loulida, Soumia, Mohammed Znari, Mohamed Naimi, and Abdelghani Aabid. "Intra- and inter-drainage variation in population structure, body condition, shape morphology and sexual dimorphism in Mauremys leprosa saharica from southern Morocco." Acta Herpetologica 18, no. 2 (December 27, 2023): 87–103. http://dx.doi.org/10.36253/a_h-11579.

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The Mediterranean pond turtle Mauremys leprosa is widely distributed in Morocco. Significant variations could be observed in this species due to the fact that it occupies a vast and environmentally diverse area. Thus, the analysis of population parameters is crucial in elucidating the differences between populations. Differences between individuals may be linked to environmental factors, including many habitat characteristics. In the present study, variation in population structure, body condition, morphology and sexual dimorphism, were examined for the Sahara Desert blue-eyed turtle M. l. saharica in southern Morocco from seven distinct localities distributed in four different drainages in southern Morocco. A total of 224 turtles were captured, sexed, weighed and then measured for their carapace and tail dimensions before being released. Among the studied populations, four were dominated by adult individuals (Taakilt: 96%, Oued Guir: 87%, Oued Ziz: 75%, Sidi ElMehdaoui: 70%), two comprised 100% of adults (Oued Noun and Tarmigt) and one population consisted of 50% adults (Lower Draa). The sex ratio was significantly different between populations, being balanced in two populations (Tarmigt and Sidi El Mehdaoui), male-biased in three populations (Oued Zizi, Oued Noun, Lower Draa) and female-biased in the two remaining populations (Oued Guir and Taakilt). Body Condition Index (BCI, g/cm3) was significantly different among populations but not between sexes, or for the Sex × Locality interaction. The Sexual Size Dimorphism (SSD), females being larger than males, varies among population with the greatest degree observed in Oued Guir population (SSD = 0.41) and the lowest in Sidi El Mehdaoui population (SSD = -0.14). Length-Weight Relation (LWR) shows that M. l. saharica has isometric growth for both male and female of Oued Guir and Tarmigt, for female of Oued Ziz, Taakilt, Oued Noun and lower Draa and hypo-allometric for male of Oued Ziz, Taakilt, Oued Noun, Lower Draa and for both male and female of Sidi El Mehdaoui. Morphological variation of carapace is shown in this species associated with population variation among basins. Increased understanding of population characteristics and their fitness status must be considered in conservation and management action plans for the species and its habitat.
17

Meyer, Leon, Louis Du Preez, Elodie Bonneau, Laurent Héritier, Marc Quintana, Aitor Valdeón, Amel Sadaoui, Nadia Kechemir-Issad, Carmen Palacios, and Olivier Verneau. "Parasite host-switching from the invasive American red-eared slider, Trachemys scripta elegans, to the native Mediterranean pond turtle, Mauremys leprosa, in natural environments." Aquatic Invasions 10, no. 1 (January 2015): 79–91. http://dx.doi.org/10.3391/ai.2015.10.1.08.

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18

Bertolero, A., and D. Oro. "Conservation diagnosis of reintroducing Mediterranean pond turtles: what is wrong?" Animal Conservation 12, no. 6 (July 3, 2009): 581–91. http://dx.doi.org/10.1111/j.1469-1795.2009.00284.x.

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19

Rathbun, Galen B., Norman J. Scott, and Thomas G. Murphey. "Terrestrial Habitat Use by Pacific Pond Turtles in a Mediterranean Climate." Southwestern Naturalist 47, no. 2 (June 2002): 225. http://dx.doi.org/10.2307/3672910.

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20

Koren, Toni, Ana Štih, Ivona Burić, Katarina Koller, Boris Lauš, and Mladen Zadravec. "The current distribution of pond slider Trachemys scripta (Reptilia: Emydidae) in Croatia." Natura Sloveniae 20, no. 1 (June 30, 2018): 33–44. http://dx.doi.org/10.14720/ns.20.1.33-44.

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The pond slider Trachemy scripta was one of the most commonly exported turtles until the last decade and often released into the wild outside its native range. It was introduced to Europe, Africa, South America and Asia and included on the EU list of 100 World's Worst Invasive Alien Species and the List of invasive alien species of Union concern. The import of the subspecies Trachemys scripta elegans into Europe and Croatia has been banned for some time, but the number of specimens recorded in nature is still increasing. In this paper we present 45 new localities were the species was observed in Croatia, which makes a total of 84 known localities. Most of the records, 58%, are in the Continental biogeographical region and the rest in the Mediterranean. It has not yet been recorded for the Alpine biogeographical region. Most records (42%) come from ponds. Three new sightings of females digging nests, laying eggs and sightings of hatchlings were recorded, suggesting successful reproduction of the species. Further surveys of this alien species in Croatia are needed.
21

Hidalgo-Vila, Judit, Carmen Díaz-Paniagua, Natividad Pérez-Santigosa, Agustín Plaza, Inés Camacho, and Fernando Recio. "Hematologic and Biochemical Reference Intervals of Free-Living Mediterranean Pond Turtles (Mauremys leprosa)." Journal of Wildlife Diseases 43, no. 4 (October 2007): 798–801. http://dx.doi.org/10.7589/0090-3558-43.4.798.

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22

Zuffi, Marco A. L., and Elena Foschi. "Reproductive patterns of European pond turtles differ between sites: a small scale scenario." Amphibia-Reptilia 36, no. 4 (2015): 339–49. http://dx.doi.org/10.1163/15685381-00003009.

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From 1996 to 2002, we studied the body size, measures of reproductive strategy (relative clutch mass and delayed reproduction at sexual maturity), and reproductive output (clutch frequency and annual egg production) of female European Pond turtles,Emys orbicularis, at two sites separated by 12 km in central Mediterranean Tuscany (San Rossore and Camp Darby, central northern Italy). Females did not reproduce at the first appearance of external sexual characters, but reproduced at larger sizes, probably as older turtles. Among years, reproductive females were more common than were non-reproductive females, yet both groups had similar body sizes. Body size (carapace length and width, plastron length and width, shell height and body mass) varied between localities and among years. Body size differed between reproductive and non reproductive females in Camp Darby, but not in San Rossore females. Shell volume did not vary among years, nor between localities, nor between reproductive status. Reproductive females had higher body condition indices (BCI) than did non-reproductive females, while BCI did not differ between females laying one clutch and females laying multiple clutches. Clutch size did not vary among years. One clutch per year was much more frequent than multiple clutches, and multiple clutches were more frequent in Camp Darby than in San Rossore females, likely due to differences in population structures between sites.
23

Martínez-López, E., P. Gómez-Ramírez, S. Espín, M. P. Aldeguer, and A. J. García-Fernández. "Influence of a Former Mining Area in the Heavy Metals Concentrations in Blood of Free-Living Mediterranean Pond Turtles (Mauremys leprosa)." Bulletin of Environmental Contamination and Toxicology 99, no. 2 (June 9, 2017): 167–72. http://dx.doi.org/10.1007/s00128-017-2122-6.

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24

Pedall, Inken, Uwe Fritz, Heiko Stuckas, Aitor Valdeón, and Michael Wink. "Gene flow across secondary contact zones of the Emys orbicularis complex in the Western Mediterranean and evidence for extinction and re-introduction of pond turtles on Corsica and Sardinia (Testudines: Emydidae)." Journal of Zoological Systematics and Evolutionary Research 49, no. 1 (June 24, 2010): 44–57. http://dx.doi.org/10.1111/j.1439-0469.2010.00572.x.

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25

Sancho, Vicente, Ignacio Lacomba, José Vicente Bataller, Joana Veríssimo, and Guillermo Velo-Antón. "First report of hybridization between Mauremys leprosa and Mauremys sinensis highlights the risk of exotic Mauremys spp. pet trade." Basic and Applied Herpetology, July 2, 2020. http://dx.doi.org/10.11160/bah.186.

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The global exponential growth in the number of exotic turtle species exploited in the pet trade market facilitates hybridization events between distantly related species. The 1997 EU trade ban on red-eared slider turtles (Trachemys scripta elegans), followed by the Spanish ban on all T. scripta subspecies in 2011, resulted in the importation of other chelonians (e.g. Graptemys spp., Pseudemys spp., Mauremys spp.), mainly from America and Asia to Spain. The importation of the Chinese stripe-necked pond turtle, Mauremys sinensis, via the pet trade market resulted in its release into natural environments across Europe, including the Iberian Peninsula where it co-occurs with the Western Mediterranean pond turtle, Mauremys leprosa. We maintained three M. leprosa females and two M. sinensis males in captivity, and analysed the obtained offspring (two hatchlings) with mitochondrial (cytochrome b) and nuclear (R35) genetic markers. Both morphological (i.e. with intermediate morphological characters) and genetic (heterozygous hatchlings) results confirmed the hybridization between these two species and raise concern about the negative effects of acclimatised Mauremys sinensis across the Mauremys leprosa range.
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Mignet, Fabien, Jean-Yves Barnagaud, Laurent Barthe, Albert Bertolero, Valérie Bosc, Florine Escot, Romain Fleuriau, et al. "Geographic variation in body size among French populations of the European pond turtle." Amphibia-Reptilia, October 14, 2020, 1–11. http://dx.doi.org/10.1163/15685381-bja10036.

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Abstract The processes underlying macroecological gradients in body size are widely debated, in part because their intraspecific variability remains poorly described even in well-studied taxa such as vertebrates. In this study, we investigated how climate, habitat, genetic lineage and sex explain body size variations in French populations of the European pond turtle (Emys orbicularis). We measured 7016 adult individuals captured in 41 populations, covering most of the species’ distribution in metropolitan France, including Corsica. Body size variation in our sample was wide and comparable to that found across the species’ worldwide range. Variation was similar in magnitude at regional and local levels, suggesting that body size is influenced by local factors as much as by regional factors such as climate or genetic lineage. Smaller sizes were associated with Mediterranean or altered oceanic climates, and with two lineages (E. o. galloitalica and E. o. galloitalica/E. o. orbicularis), while larger sizes were associated with northern environments and the orbicularis lineage. Body size variations recorded at local level reflect an adaptive response to environmental constraints, suggesting that habitat is also an important factor in understanding size variation.
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Le Gal, Anne-Sophie, Pauline Priol, Jean-Yves Georges, and Olivier Verneau. "Population structure and dynamics of the Mediterranean Pond turtle Mauremys leprosa (Schweigger, 1812) in contrasted polluted aquatic environments." Environmental Pollution, May 2023, 121746. http://dx.doi.org/10.1016/j.envpol.2023.121746.

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