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Figure 4. a, linear regression illustrating the relationship between log10 stride length and log10 stride speed. b in Morphological and performance modifications in the world's only marine lizard, the Galápagos marine iguana, Amblyrhynchus cristatus

Figure 4. a, linear regression illustrating the relationship between log10 stride length and log10 stride speed. b, linear regression illustrating the relationship between and log10 stride frequency and log10 stride speed for iguanids.

Figure 3. a, linear discriminant function illustrating shape variation between iguanids. Kernel density ellipses for each species illustrate 90 in Morphological and performance modifications in the world's only marine lizard, the Galápagos marine iguana, Amblyrhynchus cristatus

Figure 3. a, linear discriminant function illustrating shape variation between iguanids. Kernel density ellipses for each species illustrate 90% and 70% of the data distribution. b, graph of morphometric trait loadings from LD analysis.

Figure 1. a in Morphological and performance modifications in the world's only marine lizard, the Galápagos marine iguana, Amblyrhynchus cristatus

Figure 1. a, morphological measurements and landmarks used in video digitization. Also illustrated are the three movements of the femur relative to the pelvis including (b) femur protraction, (c) femur rotation and (d) femur adduction (Supporting Information, Table S15).

Figure 2. a in Morphological and performance modifications in the world's only marine lizard, the Galápagos marine iguana, Amblyrhynchus cristatus

Figure 2. a, body shape and size variation between the marine iguana, green iguana and black spiny-tailed iguana. b, body size and shape variation in subspecies of marine iguana (juveniles excluded). Residual means of morphometric traits are expressed on the iguanid bodies. The ancestral state estimates for body mass are shown along phylogenetic trees. Morphometrics represented include head-neck length (HN), forelimb length (FL), hindlimb length (HL) and tail length (tailL). Iguanid bodies are scaled according to mean weight.

opencc-zeroApr 2023View details →

Data for: An experimental assessment of detection dog ability to locate great crested newts (Triturus cristatus) at a channeled distance and through soil

Detection dogs are increasingly used to locate cryptic wildlife species, but their use for amphibians is still rather underexplored. In the present paper we focus on the great crested newts (Triturus cristatus), a European species which is experiencing high conservation concerns across its range, and assess the ability of a trained detection dog to locate individuals during their terrestrial phase. More specifically, we used a series of randomised, double-blinded experiments to document whether a range of distances between target newts and the detection dog affects the ability of localisation, and to assess the ability and efficiency of target newt detection in simulated subterranean refugia through 20 cm of two common soil types (clay and sandy soil, both with and without air vents to mimic mammal burrows, a common refuge used by T. cristatus). The detection dog accurately located all individual T. cristatus across the entire range of tested distances (25 cm - 2 m). The substrate trials revealed that the detection dog could locate individuals also through soil. As expected, the detection time during the soil discrimination trials was significantly reduced for treatments with vents. Contrary to existing studies with detection dogs in human forensic contexts, however, detection was generally faster for T. cristatus under clay soil compared to sandy soil. Our study provides a general baseline for the use of detection dogs in locating T. cristatus and similar amphibian species during their terrestrial phase.

publicJul 2021View details →

Data from: Scale-dependent effects of terrestrial habitat on genetic variation in the great crested newt (Triturus cristatus)

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publicOct 2014View details →

Data from: The crested newt Triturus cristatus recolonized temperate Eurasia from an extra-Mediterranean glacial refugium

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