Results 11 to 20 of about 1,454 (195)

Roars, Rumbles, and Resonance: A Systematic Review and Meta-Analysis of Crocodylian Acoustic Signals. [PDF]

Ecol Evol
Crocodylians are highly vocal reptiles, possessing a complex acoustic signalling system including vocal and non‐vocal signals used for courtship, mating, mediating conflict, and providing maternal care. Despite this, research on crocodylian acoustic signalling remains infrequent, with methodologies and terminology varying widely across studies.
Flores SA, Dwyer RG, Parsons S, Potvin DA.   +3 more
europepmc   +2 more sources

Size, not phylogeny, explains the morphology of the endosseous labyrinth in the crown clade Crocodylia. [PDF]

J Anat
Here, we present the most complete dataset to date on the endosseous labyrinths of extant crocodylians. Using 3D geometric morphometrics, we show that allometry constitutes a major contributor of the shape variation of the crocodylian endosseous labyrinths and that the development of this structure is likely linked to the braincase conformation, in all
Pochat-Cottilloux Y, Perrichon G, Hautier L, Rinder N, Amiot R, Raselli I, Adrien J, Lachambre J, Fernandez V, Martin JE.   +9 more
europepmc   +2 more sources

Clustering crocodylian dental morphology: Insights into functional adaptations, diet, and ontogeny. [PDF]

J Anat
Extant crocodylians may be divided into five clusters based on the residuals of four linear dental measurements (y‐axes) and their variation along the jaw (x‐axes). These clusters correlate to snout shape, prey preference, and feeding ecology, particularly prey size and the degree of processing necessary. Multiple families and subfamilies were found in
Testin JJ, D'Amore DC.
europepmc   +2 more sources

Ontogenetic variability of the intertympanic sinus distinguishes lineages within Crocodylia. [PDF]

J Anat, 2023
We recognised the usefulness of the paratympanic sinuses in distinguishing major lineages within Crocodylia. 3D geometric morphometric approaches allow us to quantify the ontogeny and variability of the intertympanic sinus within one of the largest dataset of modern species, including one of the largest specimens ever scanned at such a high resolution.
Perrichon G, Hautier L, Pochat-Cottilloux Y, Raselli I, Salaviale C, Dailh B, Rinder N, Fernandez V, Adrien J, Lachambre J, Martin JE.   +10 more
europepmc   +2 more sources

Evolution of growth strategy in alligators and caimans informed by osteohistology of the late Eocene early-diverging alligatoroid crocodylian Diplocynodon hantoniensis. [PDF]

J Anat
Living alligatoroids (alligators and caimans) share osteohistological features and display similar overall growth rates. However, it is unclear if these shared patterns are the result of convergent responses or reflect an ancestral condition. In this study, we histologically sampled nine femora of the fossil alligatoroid Diplocynodon hantoniensis to ...
Hoffman DK, Goldsmith ER, Houssaye A, Maidment SCR, Felice RN, Mannion PD.   +5 more
europepmc   +2 more sources

Trifold origin of the reptilian ear ossicle and its relation to the evolutionary modification of the temporal skull region. [PDF]

J Anat
The columella‐complex in reptile middle ears involves the footplate, columella shaft, and extracolumella. The latter is partly of quadrate developmental origin, whereas the footplate derives from the mesodermal otic capsule, the shaft and another part of the extracolumella from the hyoid arch.
Werneburg I, Bronzati M.
europepmc   +2 more sources

Analyzing the Life History of Caimans: The Growth Dynamics of Caiman latirostris From an Osteohistological Approach. [PDF]

J Morphol
This research offers insights into the life history and growth dynamics of Caiman latirostris, highlighting their growth patterns, aging, and attainment of sexual maturity, and how environmental conditions impact their development. This study has direct implications for understanding the life histories of extinct archosaurs and other sauropsids ...
Pereyra ME, Bona P, Siroski P, Chinsamy A.   +3 more
europepmc   +2 more sources

Long-distance swimming by African lions in Uganda. [PDF]

Ecol Evol
We present a visual documentation of long‐distance swimming by African lions in Uganda. This first recorded visual evidence shows lions in the Queen Elizabeth National Park are engaging in risky behavior to find females. Abstract Earth's most imperiled and iconic wildlife are facing tough decisions under increasing human pressure and limited resources.
Braczkowski A, Ochse L, Atukwatse B, Cornille O, O'Bryan C, Lindsey P, Kotze R, Gibson L, Biggs D.   +8 more
europepmc   +2 more sources

Assessing abundance-suitability models to prioritize conservation areas for the dwarf caimans in South America. [PDF]

Ecol Evol
This study identified conservation priorities for the South American dwarf caimans (Paleosuchus palpebrosus and P. trigonatus) relying on robust species distribution and abundance models. We support that environmental suitability and spatial abundance are not always congruent and cannot be considered reliable surrogates for one another, and ...
Rodriguez-Cordero AL, Balaguera-Reina SA, Gross BA, Munn M, Densmore LD.   +4 more
europepmc   +2 more sources

Predicting habitat suitability of Caiman yacare and assessing the role of protected areas under current and future climate and deforestation models

Climate Risk Management, 2022
Climate change and habitat degradation are recognized as serious threats for wildlife and an important aspects to be considered in conservation biology.
Andrés L. Rodriguez-Cordero, Sergio A. Balaguera-Reina, Juan C. Morales-Franco, Margaret Munn, Llewellyn D. Densmore III   +4 more
doaj   +1 more source