On the amphibious food uptake and prey manipulation behavior in the Balkan-Anatolian crested newt ( Triturus ivanbureschi, Arntzen and Wielstra, 2013)

Lukanov, Simeon; Tzankov, Nikolay; Handschuh, Stephan; Heiss, Egon; Naumov, Borislav; Natchev, Nikolay

doi:10.1016/j.zool.2016.02.002

Cited by 12 publications

(20 citation statements)

References 24 publications

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“…In T. ivanbureschi , prey shaking on land is represented in single side movements of the body ( Figs. 3A – 3D ; Lukanov et al, 2016 ). In S. salamandra , however, the prey shaking movements occurred in grouped clusters including up to five shakes.…”

Section: Resultsmentioning

confidence: 99%

“…The “true salamanders” are adapted predominantly to terrestrial lifestyle and, as such, cannot perform suction feeding, which is reflected in their cranial morphology ( Deban, 2003 ). According to Lukanov et al (2016) , the skeleton of the cranio-cervical complex is more fragile in T. ivanbureschi when compared to that of S. salamandra . The authors predicted that S. salamandra executes complex “shaking” or “killing” movements to subdue and immobilize their prey (sensu Dauth, 1983 ; Dauth, 1986 ; Natchev et al, 2015 ).…”

Section: Introductionmentioning

confidence: 99%

“…In the range of the present study, we confirm that prediction and report on the specifics of the “prey shaking” behavior in S. salamandra . The execution of vigorous “prey shaking” on land requires strengthening of the skull and the cranio-cervical connection (see Natchev et al, 2015 ; Lukanov et al, 2016 ).…”

Section: Introductionmentioning

confidence: 99%

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Contributions to the functional morphology of caudate skulls: kinetic and akinetic forms

Natchev

Handschuh

Lukanov

et al. 2016

PeerJ

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A strongly ossified and rigid skull roof, which prevents parietal kinesis, has been reported for the adults of all amphibian clades. Our μ-CT investigations revealed that the Buresch’s newt (Triturus ivanbureschi) possess a peculiar cranial construction. In addition to the typical amphibian pleurokinetic articulation between skull roof and palatoquadrate associated structures, we found flexible connections between nasals and frontals (prokinesis), vomer and parasphenoid (palatokinesis), and between frontals and parietals (mesokinesis). This is the first description of mesokinesis in urodelans. The construction of the skull in the Buresch’s newts also indicates the presence of an articulation between parietals and the exocipitals, discussed as a possible kind of metakinesis. The specific combination of pleuro-, pro-, meso-, palato-, and metakinetic skull articulations indicate to a new kind of kinetic systems unknown for urodelans to this date. We discuss the possible neotenic origin of the skull kinesis and pose the hypothesis that the kinesis in T. ivanbureschi increases the efficiency of fast jaw closure. For that, we compared the construction of the skull in T. ivanbureschi to the akinetic skull of the Common fire salamander Salamandra salamandra. We hypothesize that the design of the skull in the purely terrestrial living salamander shows a similar degree of intracranial mobility. However, this mobility is permitted by elasticity of some bones and not by true articulation between them. We comment on the possible relation between the skull construction and the form of prey shaking mechanism that the species apply to immobilize their victims.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Contributions to the functional morphology of caudate skulls: kinetic and akinetic forms

Natchev

Handschuh

Lukanov

et al. 2016

PeerJ

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“…Aside from examples of rudimentary processing such as powerful bites, prey shaking or spinning (Bemis et al, 1983;Deban and Wake, 2000;Fortuny et al, 2015;Lukanov et al, 2016;Measey and Herrel, 2006;O'Reilly, 2000;Summers and Wake, 2005;Tanner, 1971;Wake and Deban, 2000), it had been suggested that some salamanders might use palatal dentition and tongue movements to manipulate prey Regal, 1966;Reilly, 1996). Still, the only elaborate processing mechanism involving complex and rhythmic movements demonstrated so far occurs in plethodontid salamanders from the genus Desmognathus.…”

Section: Introductionmentioning

confidence: 99%

Chewing or not? Intraoral food processing in a salamandrid newt

Heiss

Schwarz

Konow

2019

Journal of Experimental Biology

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Food processing refers to any form of mechanical breakdown of food prior to swallowing. Variations of this behaviour are found within all major gnathostome groups. Chewing is by far the most commonly used intraoral processing mechanism and involves rhythmic mandibular jaw and hyobranchial (tongue) movements. Chewing occurs in chondrichthyans (sharks and rays), actinopterygians (rayfinned fishes), dipnoi (lungfishes) as well as amniotes and involves similarities in the patterns of muscle activity and movement of the feeding apparatus. It has been suggested that amniote chewing, which involves the interaction of movements of the mandibular jaw and the muscular tongue, has evolved as part of the tetrapod land invasion. However, little is known about food-processing mechanisms in lissamphibians, which might have retained many ancestral tetrapod features. Here, we identified a processing mechanism in the salamandrid newt, Triturus carnifex, which after prey capture displays cyclic head bobbing in concert with rhythmic jaw and tongue movements. We used high-speed fluoroscopy, anatomical reconstructions and analyses of stomach contents to show that newts, although not using their mandibular jaws, deploy a derived processing mechanism where prey items are rasped rhythmically against the dentition on the mouth roof, driven by a loop motion of the tongue. We then compared patterns and coordination of jaw and tongue movements across gnathostomes to conclude that food processing in this newt species shares traits with processing mechanisms in fish as well as amniotes. This discovery casts salamanders as promising models for reconstructing the evolution of intraoral processing mechanisms at the fish-tetrapod split.

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“…Alternatively, specimens can be scanned inside liquid-filled tubes (e.g. Kleinteich and Gorb, 2015;Lukanov et al, 2016). In the latter case, care should be taken that the specimen does not contact the edges of the tube as this could complicate the image processing steps (du Plessis et al, 2017b).…”

Section: Sample Preparationmentioning

confidence: 99%

X-ray microtomography in herpetological research: a review

Broeckhoven

Plessis

2018

Amphib.-Reptilia

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Herpetological research, like any other (palaeo)biological science, relies heavily on accurate data collection, particularly visualisation and quantification of anatomical features. While several high-resolution imaging methods are currently available, one technique in particular, x-ray microtomography or micro-computed tomography, is on the verge of revolutionising our understanding of the morphology of amphibians and reptiles. Here, we present a review on the prevalence and trends of x-ray microtomography in herpetological studies carried out over the last two decades. We describe its current use, provide practical guidelines for future research that focusses on the morphological study of reptiles and amphibians, and highlight emerging trends including soft-tissue and in vivo scanning. Furthermore, while x-ray microtomography is a rapidly evolving field with great potential, various important drawbacks are associated with its use, including sample size effect and measurement errors resulting from differences in spatial resolution and preparation techniques. By providing recommendations to overcome these hurdles, we ultimately aim to maximise the benefits of x-ray microtomography to herpetological research.

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On the amphibious food uptake and prey manipulation behavior in the Balkan-Anatolian crested newt ( Triturus ivanbureschi, Arntzen and Wielstra, 2013)

Cited by 12 publications

References 24 publications

Contributions to the functional morphology of caudate skulls: kinetic and akinetic forms

Contributions to the functional morphology of caudate skulls: kinetic and akinetic forms

Chewing or not? Intraoral food processing in a salamandrid newt

X-ray microtomography in herpetological research: a review

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