So different, yet so alike: North American slider turtles (Trachemys scripta)

Vamberger, Melita; Ihlow, Flora; Asztalos, Marika; Dawson, Jeffrey D.; Jasinski, Steven E.; Praschag, Peter; Fritz, Uwe

doi:10.26049/vz70-1-2020-06

Cited by 7 publications

(6 citation statements)

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“…At each point, turtles were searched for and counted for five minutes by each observer simultaneously. Species were identified based on head morphology criteria [13,15,23]. Trachemys individuals that could not be assigned to one of the two species were simply considered as Trachemys spp.…”

Section: Count Data and Selection Of Variablesmentioning

confidence: 99%

“…In contrast, the Florida slider, T. scripta, was introduced through the pet trade, and then released by owners into the natural environment [5,17,[19][20][21][22]. Although T. scripta is subdivided into three subspecies [23], only T. scripta elegans is known to occur in the French West Indies [5,17]. This species is noticeably on the list of the 100 most invasive species in the world [21].…”

Section: Introductionmentioning

confidence: 99%

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Modelling the Distribution of Three Invasive Freshwater Turtles in Mainland Guadeloupe: Analysis of Their Presence, Abundance and Co-Occurrence

Paul,

Cézilly,

Bezault

et al. 2023

Sustainability

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The presence of invasive alien species in Caribbean islands is symptomatic of deleterious human impacts on ecosystems. In Guadeloupe, three invasive freshwater turtles (Pelusios castaneus, Trachemys stejnegeri and T. scripta) have been introduced, from colonial times up to the 20th century. However, little information exists on their current distribution and relative abundance. We surveyed 62 undrained sites in Guadeloupe to identify the presence and relative abundance of exotic freshwater turtles from visual observations. We then relied on statistical models to identify factors affecting spatial variation in turtle occupancy (presence/absence) rate and abundance. We found significant positive spatial co-occurrence between the two Trachemys species, suggesting that they tend to select similar habitats and to be active at the same time. In contrast, the spatial distribution of the two Trachemys species appeared to be independent of that of P. castaneus. Model selection indicated that the degree of anthropization around survey sites had contrasting effects on both the presence and abundance of turtles, being positive for Trachemys species and negative for P. castaneus. A comparison with previous reports indicated that Trachemys species have extended their spatial distribution in Guadeloupe and may have become more abundant than P. castaneus. We discuss the relevance of our results to the understanding of the invasion dynamics of exotic turtles and make recommendations for future research.

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Section: Count Data and Selection Of Variablesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modelling the Distribution of Three Invasive Freshwater Turtles in Mainland Guadeloupe: Analysis of Their Presence, Abundance and Co-Occurrence

Paul,

Cézilly,

Bezault

et al. 2023

Sustainability

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“…Conversely, the "Biviere di Gela" is an Oriented Nature Reserve and a Ramsar site that extends over 1.2 km 2 , being one of the island's largest coastal et al [2020], and marked with a triangular file on the marginal scutes of the carapace. In addition, the colouration and pattern of the head were observed to determine which subspecies the collected individual belonged to [VAMBERGER et al 2020]. After having taken the morphometric measurements (body mass; carapace linear length, width and height; plastron linear length and width), and determined the age class, after VAMBERGER, KOS [2011], sex and subspecies of each caught turtle, a small tissue sample from the interdigital posterior membrane was cut off from each of them, fixed in situ in 96% ethanol and then stored in a freezer at -20°C.…”

Section: Sampling Dna Extraction and Selected Loci Amplificationmentioning

confidence: 99%

“…To date, one of the most widespread species beyond its native distribution range is the pond slider Trachemys scripta (Thunberg in Schoepff 1792), which is a native of the southeastern United States [ERNST, LOVICH 2009;VAMBERGER et al 2020]. In fact, due to a massive and low-regulated pet trade, the species was imported all over the world, especially into Europe, until a pet trade regulation, implemented in the late 90s, banned the importation into Europe (EU Regulation No.…”

Section: Introductionmentioning

confidence: 99%

Journal of Water and Land Development

2022

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The pond slider Trachemys scripta is one of the most widespread alien turtle species in the world. Its unregulated trade and the consequent uncontrolled releases into the wild led to negative impacts on the native turtles of the invaded areas. In Italy, alien pond sliders are widely spread, and the occurrence of hatchlings and well-established populations is known in some areas. However, to date in Sicily, only a single female of Trachemys scripta laying eggs was reported. Besides that, nothing is known about the actual reproduction success and establishment of self-sustaining T. scripta populations in Sicily. Therefore, based on 14 previously characterised highly polymorphic microsatellite loci, we aimed to unravel if the alien turtles successfully reproduce in Sicily, in both natural and semi-natural areas (i.e., lake "Biviere di Gela" and "Parco d'Orléans", respectively). Our results show a clear structuring of the two studied populations. Several full-sibling relationships between the sampled turtles were found, suggesting actual reproduction in the wild of the pond sliders in Sicily. However, further sampling is desirable since no parent-offspring relationships were observed in the studied populations. Due to our results, systematic monitoring of alien pond sliders in the whole of Sicily is crucial for better planning of mitigation strategies in order to protect the native biota of Sicilian inland waters.

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“…Trachemys scripta is native to south-eastern North America (Ernst and Lovich 2009;Vamberger et al 2020) and meanwhile has acquired a global distribution, being widespread on all continents except Antarctica (Kikillus et al 2010;Uetz et al 2022). Due to their popularity as pets, especially the subspecies T. scripta elegans, they were massively imported to Europe in the 1980s and 1990s (Arvy and Servan 1998;Ernst and Lovich 2009;Vamberger et al 2012) and released in water bodies.…”

Section: Introductionmentioning

confidence: 99%

Chelonian challenge: three alien species from North America are moving their reproductive boundaries in Central Europe

Tietz¹,

Penner²,

Vamberger³

2023

Self Cite

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Biological invasions by alien species have substantial economic impacts and are a major driver of the ongoing decline and loss of biodiversity. Through humans, the North American pond slider (Trachemys scripta) has acquired a global distribution over the last decades and is currently listed among the worst invasive reptile species. However, in more recent times, other freshwater chelonian species have increasingly been recorded far outside their native distribution ranges as well, not only on the same continent but also on others. Despite that, the impact of alien chelonians on their respective new ecosystems remains unclear. The long-term effects and severity of impacts of alien populations mostly depend on whether they ultimately succeed in establishing themselves. This is not entirely resolved for chelonians in Central Europe. To answer that, we investigated wild populations of three non-native chelonian species from North America in Germany (Pseudemys concinna, Graptemys pseudogeographica and Trachemys scripta) applying population genetic approaches. We revealed the successful reproduction of all three species in Germany and provide the very first record for the reproduction of P. concinna and G. pseudogeographica in a temperate continental climate zone outside their native distribution. Based on our unambiguous evidence of natural reproduction, we call for dedicated studies to verify how widespread established populations are and to investigate the existing and potential impacts of all three species in a range of ecosystems along a climatic gradient. Such data is urgently needed to revise the current risk assessments of non-native chelonians, especially in Central European countries.

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So different, yet so alike: North American slider turtles (Trachemys scripta)

Cited by 7 publications

References 0 publications

Modelling the Distribution of Three Invasive Freshwater Turtles in Mainland Guadeloupe: Analysis of Their Presence, Abundance and Co-Occurrence

Modelling the Distribution of Three Invasive Freshwater Turtles in Mainland Guadeloupe: Analysis of Their Presence, Abundance and Co-Occurrence

Journal of Water and Land Development

Chelonian challenge: three alien species from North America are moving their reproductive boundaries in Central Europe

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So different, yet so alike: North American slider turtles (Trachemys scripta)

Cited by 7 publications

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Modelling the Distribution of Three Invasive Freshwater Turtles in Mainland Guadeloupe: Analysis of Their Presence, Abundance and Co-Occurrence

Modelling the Distribution of Three Invasive Freshwater Turtles in Mainland Guadeloupe: Analysis of Their Presence, Abundance and Co-Occurrence

Journal of Water and Land Development

﻿Chelonian challenge: three alien species from North America are moving their reproductive boundaries in Central Europe

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Chelonian challenge: three alien species from North America are moving their reproductive boundaries in Central Europe