Lissotriton helveticus: Jan Willem Arntzen, Trevor Beebee, Robert Jehle, Mathieu Denoël, Benedikt Schmidt, Jaime Bosch, Claude Miaud, Miguel Tejedo, Miguel Lizana, Iñigo Martínez-Solano, Alfredo Salvador, Mario García-París, Ernesto Recuero Gil, Paulo Sá-Sousa, Philippe Geniez

2008 ◽  
Author(s):  
Keyword(s):  
Lissotriton Helveticus

Acoustic orientation in the palmate newt, Lissotriton helveticus

2007 ◽  
Vol 61 (9) ◽  
pp. 1329-1335 ◽  
Author(s):  
Francisco J. Diego-Rasilla ◽  
Rosa M. Luengo
Keyword(s):  
Lissotriton Helveticus ◽  
Palmate Newt

Modelling skin surface areas involved in water transfer in the Palmate Newt (Lissotriton helveticus)

2014 ◽  
Vol 92 (8) ◽  
pp. 707-714 ◽  
Author(s):  
Thomas Wardziak ◽  
Laurent Oxarango ◽  
Sébastien Valette ◽  
Laurent Mahieu-Williame ◽  
Pierre Joly
Keyword(s):  
Surface Area ◽  
Skin Surface ◽  
Water Transfer ◽  
The Body ◽  
Body Volume ◽  
3D Analysis ◽  
Evaporative Water ◽  
Surface Areas ◽  
Lissotriton Helveticus ◽  
Palmate Newt

Magnetic resonance imaging (MRI) based 3D reconstructions were used to derive accurate quantitative data on body volume and functional skin surface areas involved in water transfer in the Palmate Newt (Lissotriton helveticus (Razoumovsky, 1789)). Body surface area can be functionally divided into evaporative surface area that interacts with the atmosphere and controls the transepidermal evaporative water loss (TEWL); ventral surface area in contact with the substratum that controls transepidermal water absorption (TWA); and skin surface area in contact with other skin surfaces when amphibians adopt water-conserving postures. We generated 3D geometries of the newts via volume-rendering by a “segmentation” process carried out using a graph-cuts algorithm and a Web-based interface. The geometries reproduced the two postures adopted by the newts, i.e., an I-shaped posture characterized by a straight body without tail coiling and an S-shaped posture where the body is huddled up with the tail coiling along it. As a guide to the quality of the surface area estimations, we compared measurements of TEWL rates between living newts and their agar replicas (reproducing their two postures) at 20 °C and 60% relative humidity. Whereas the newts did not show any physiological adaptations to restrain evaporation, they expressed an efficient S-shaped posture with a resulting water economy of 22.9%, which is very close to the 23.6% reduction in evaporative surface area measured using 3D analysis.

scholarly journals Side-by-side secretion of Late Palaeozoic diverged courtship pheromones in an aquatic salamander

2015 ◽  
Vol 282 (1803) ◽  
pp. 20142960 ◽  
Author(s):  
Ines Van Bocxlaer ◽  
Dag Treer ◽  
Margo Maex ◽  
Wim Vandebergh ◽  
Sunita Janssenswillen ◽  
...  
Keyword(s):  
Copulatory Organ ◽  
Molecular Dating ◽  
Physical Contact ◽  
Male Courtship ◽  
Internal Fertilization ◽  
Lissotriton Helveticus ◽  
Late Palaeozoic ◽  
Plethodontid Salamanders

Males of the advanced salamanders (Salamandroidea) attain internal fertilization without a copulatory organ by depositing a spermatophore on the substrate in the environment, which females subsequently take up with their cloaca. The aquatically reproducing modern Eurasian newts (Salamandridae) have taken this to extremes, because most species do not display close physical contact during courtship, but instead largely rely on females following the male track at spermatophore deposition. Although pheromones have been widely assumed to represent an important aspect of male courtship, molecules able to induce the female following behaviour that is the prelude for successful insemination have not yet been identified. Here, we show that uncleaved sodefrin precursor-like factor (SPF) protein pheromones are sufficient to elicit such behaviour in female palmate newts ( Lissotriton helveticus ). Combined transcriptomic and proteomic evidence shows that males simultaneously tail-fan multiple ca 20 kDa glycosylated SPF proteins during courtship. Notably, molecular dating estimates show that the diversification of these proteins already started in the late Palaeozoic, about 300 million years ago. Our study thus not only extends the use of uncleaved SPF proteins outside terrestrially reproducing plethodontid salamanders, but also reveals one of the oldest vertebrate pheromone systems.

Interactions between freshwater mussels and newts: a novel form of parasitism?

2008 ◽  
Vol 29 (4) ◽  
pp. 457-462 ◽  
Author(s):  
Edmée Engel ◽  
Klaus Groh ◽  
Richard Griffiths ◽  
Laura Wood ◽  
Laurent Schley
Keyword(s):  
Freshwater Mussels ◽  
Egg Laying ◽  
Interspecific Relationship ◽  
Triturus Cristatus ◽  
High Occurrence ◽  
Local Tissue ◽  
Lissotriton Helveticus ◽  
Bone Damage ◽  
Ecological Implications ◽  
The Relationship

Abstract Small freshwater mussels are sometimes found attached to the toes of aquatic phase amphibians, but the ecological implications of this interspecific relationship are unknown. Toe condition and mussel presence were recorded for newts caught in 37 ponds in Luxembourg between March and June 2007. All four local newt species were affected (Lissotriton helveticus, L. vulgaris, Mesotriton alpestris and Triturus cristatus), primarily by the mussel Sphaerium nucleus but also by Pisidium subtruncatum. Mussel attachment was observed in three ponds, with a particularly high occurrence in one pond, where 23% of newts were affected and significantly more toes were damaged than in other ponds. Mussels caused local tissue and bone damage to their host and may interfere with egg-laying. Twenty-two newts with attached mussels were observed in aquaria for up to 3 days: 13 mussels detached when the newt's toe fell off and nine remained attached. If the mussels benefit from the interaction through, for example, enhanced dispersal then the relationship between the two taxa represents a novel form of parasitism.

scholarly journals Impact of both desiccation and exposure to an emergent skin pathogen on transepidermal water exchange in the palmate newt Lissotriton helveticus 

2013 ◽  
Vol 104 (3) ◽  
pp. 215-224 ◽  
Author(s):  
T Wardziak ◽  
E Luquet ◽  
S Plenet ◽  
JP Léna ◽  
L Oxarango ◽  
...  
Keyword(s):  
Water Exchange ◽  
Lissotriton Helveticus ◽  
Palmate Newt ◽  
Skin Pathogen

scholarly journals Pathological and phylogenetic characterization ofAmphibiothecumsp. infection in an isolated amphibian (Lissotriton helveticus) population on the island of Rum (Scotland)

Parasitology ◽  
2016 ◽  
Vol 144 (4) ◽  
pp. 484-496 ◽  
Author(s):  
CATERINA FIEGNA ◽  
CHARLOTTE L. CLARKE ◽  
DARREN J. SHAW ◽  
JOHANNA L. BAILY ◽  
FRANCES C. CLARE ◽  
...  
Keyword(s):  
Infectious Disease ◽  
Phylogenetic Analysis ◽  
Clinical Outcome ◽  
Novel Species ◽  
Skin Lesions ◽  
Phylogenetic Characterization ◽  
Gross Pathology ◽  
Lissotriton Helveticus ◽  
The Uk ◽  
Cyst Morphology

SUMMARYOutbreaks of cutaneous infectious disease in amphibians are increasingly being attributed to an overlooked group of fungal-like pathogens, the Dermocystids. During the last 10 years on the Isle of Rum, Scotland, palmate newts (Lissotriton helveticus) have been reportedly afflicted by unusual skin lesions. Here we present pathological and molecular findings confirming that the pathogen associated with these lesions is a novel organism of the order Dermocystida, and represents the first formally reported, and potentially lethal, case of amphibian Dermocystid infection in the UK. Whilst the gross pathology and the parasite cyst morphology were synonymous to those described in a study from infectedL. helveticusin France, we observed a more extreme clinical outcome on Rum involving severe subcutaneous oedema. Phylogenetic topologies supported synonymy between Dermocystid sequences from Rum and France and as well as their distinction fromAmphibiocystidiumspp. Phylogenetic analysis also suggested that the amphibian-infecting Dermocystids are not monophyletic. We conclude that theL. helveticus-infecting pathogen represents a single, novel species;Amphibiothecum meredithae.

Spatial genetic structure of Lissotriton helveticus L. following the restoration of a forest ponds network

2017 ◽  
Vol 18 (4) ◽  
pp. 853-866 ◽  
Author(s):  
Francis Isselin-Nondedeu ◽  
Audrey Trochet ◽  
Thomas Joubin ◽  
Damien Picard ◽  
Roselyne Etienne ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Spatial Genetic Structure ◽  
Lissotriton Helveticus
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