scholarly journals The Lack of Nasolacrimal Ducts in Plethodontid Salamanders?

2018 ◽  
Vol 301 (5) ◽  
pp. 765-775 ◽  
Author(s):  
Dustin S. Siegel ◽  
Michael S. Taylor ◽  
David M. Sever ◽  
Stanley E. Trauth
Keyword(s):  
Plethodontid Salamanders ◽  
Nasolacrimal Ducts

Cytogenetics of the European plethodontid salamanders of the genus Hydromantes (Amphibia, Urodela)

Chromosoma ◽  
1986 ◽  
Vol 94 (5) ◽  
pp. 377-388 ◽  
Author(s):  
Irma Nardi ◽  
Stefania De Lucchini ◽  
Renata Batistoni ◽  
Francesca Andronico
Keyword(s):  
Plethodontid Salamanders

scholarly journals Correction to: Plethodontid salamanders show variable disease dynamics in response to Batrachochytrium salamandrivorans chytridiomycosis

2021 ◽  
Author(s):  
Graziella V. DiRenzo ◽  
Ana V. Longo ◽  
Carly R. Muletz-Wolz ◽  
Allan P. Pessier ◽  
Jessica A. Goodheart ◽  
...  
Keyword(s):  
Disease Dynamics ◽  
Batrachochytrium Salamandrivorans ◽  
Plethodontid Salamanders

scholarly journals Ecological Observations on Hybrid Populations of European Plethodontid Salamanders, Genus Speleomantes

Diversity ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 285
Author(s):  
Enrico Lunghi ◽  
Fabio Cianferoni ◽  
Stefano Merilli ◽  
Yahui Zhao ◽  
Raoul Manenti ◽  
...  
Keyword(s):  
Body Condition ◽  
Parental Species ◽  
Stomach Contents ◽  
Trophic Niche ◽  
Natural Hybrid ◽  
Ecological Information ◽  
Total Length ◽  
Plethodontid Salamanders ◽  
The Future ◽  
First Time

Speleomantes are the only plethodontid salamanders present in Europe. Multiple studies have been performed to investigate the trophic niche of the eight Speleomantes species, but none of these studies included hybrid populations. For the first time, we studied the trophic niche of five Speleomantes hybrid populations. Each population was surveyed twice in 2020, and stomach flushing was performed on each captured salamander; stomach flushing is a harmless technique that allows stomach contents to be inspected. We also assessed the potential divergence in size and body condition between natural and introduced hybrids, and their parental species. Previously collected data on Speleomantes were included to increase the robustness of these analyses. In only 33 out of 134 sampled hybrid Speleomantes we recognized 81 items belonging to 11 prey categories. The frequency of empty stomachs was higher in females and individuals from natural hybrid populations, whereas the largest number of prey was consumed by males. We compared the total length and body condition of 685 adult salamanders belonging to three types of hybrids and three parental (sub)species. Three group of salamanders (one hybrid and two parental species) showed significantly larger size, whereas no difference in body condition was observed. This study provided novel ecological information on Speleomantes hybrid populations. We also provided insights into the potential divergence between hybrids and parental species in terms of size and body condition. We discuss our findings, and formulate several hypotheses that should be tested in the future.

Dacryolithiasis diagnosis and treatment: a 25-year experience using nasal endoscopy

2021 ◽  
pp. bjophthalmol-2021-319671
Author(s):  
Alexis Khorrami Kashi ◽  
Chafik Keilani ◽  
Thien-Huong Nguyen ◽  
Pierre Keller ◽  
Sina Elahi ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Gold Standard ◽  
Nasolacrimal Duct ◽  
Success Rates ◽  
Radiological Findings ◽  
Endoscopic Findings ◽  
Lacrimal System ◽  
Secondary Endpoints ◽  
Endonasal Dcr ◽  
Nasolacrimal Ducts

BackgroundDacryolith-induced epiphora is caused by a chronic obstruction of the nasolacrimal duct whose aetiology is often specified peroperatively. Dacryocystorhinostomy (DCR) has been often regarded as the gold standard to treat dacryolithiasis. Hasner’s valve (HV) incision is a technique to evacuate lithiasis through its physiological track. The purpose of this study was to describe clinical and radiological findings associated with presence of dacryoliths in patients who underwent surgery and to assess the efficacy of these two procedures.MethodsThis study was a comparative interventional multicentric retrospective study including patients referred for an epiphora. The primary endpoint was to determine clinical and endoscopic findings associated with dacryoliths. The secondary endpoints were to evaluate the performance of CT dacryocystography (CT-DG) in the diagnosis of dacryoliths and the success rate of the surgical treatment 6 months postoperatively.Results4677 nasolacrimal ducts (NLDs) (78.0% female, mean age 59.2) were included in the study. 3913 underwent DCR, and 764 underwent HV incision. 291 out of 4677 NLDs (6.2%) were found to have dacryoliths. Presence of mucocele associated to a permeable lacrimal system (OR 8.17 (95% 4.62 to 14.44), p<0.01) was associated with presence of lithiasis peroperatively. Success rates at 6 months were 95.6% for endonasal DCR and 94.6% for incision of HV in dacryolithiasis group (p<0.01). CT-DG had a negative predictive value of 96.3% to detect lithiasis (p<0.01).ConclusionStrong clinical and endoscopic findings may improve the imputability of dacryoliths in epiphora. Evacuation of dacryolithiasis through its physiological track was first described in this study in adults with similar results to DCR in patients presenting with dacryolithiasis.

Dacryostenosis in Newborns: Probing, or Syringing, or Both?

2000 ◽  
Vol 10 (2) ◽  
pp. 128-131 ◽  
Author(s):  
A.A. Tahat
Keyword(s):  
Methylene Blue ◽  
High Pressure ◽  
Nasolacrimal Duct ◽  
Nasolacrimal Duct Obstruction ◽  
Congenital Nasolacrimal Duct Obstruction ◽  
Duct Obstruction ◽  
The Third ◽  
Lacrimal System ◽  
Age Range ◽  
Nasolacrimal Ducts

Purpose This prospective study was designed to establish whether it is more effective to treat symptomatic congenital nasolacrimal duct obstruction by probing, or high-pressure irrigation, or both. Methods During the period February 1991 to January 1999, 228 infants (300 nasolacrimal ducts) were examined (132 males, 96 females, age range 12–13 months). These patients were divided into three groups of 100 ducts each. The first group was probed only; in the second group the nasolacrimal ducts were irrigated under high pressure using methylene blue-stained saline, and the third group was probed and irrigated in the same setting. The procedures were done under light general anesthesia. Results Ninety-one ducts in the first group improved after probing. In the second group 64 ducts improved after irrigation. In the third group 96 ducts improved after both probing and irrigation. Conclusions To treat symptomatic congenital nasolacrimal duct obstruction, it is more effective to combine high-pressure irrigation and probing. This gives a better success rate, first in treatment and secondarily, permitting intraoperative verification of the patency of the excretory lacrimal system.

Localization of 5S RNA genes on chromosomes of plethodontid salamanders

Chromosoma ◽  
1978 ◽  
Vol 65 (3) ◽  
pp. 213-230 ◽  
Author(s):  
Pedro E. Le�n ◽  
James Kezer
Keyword(s):  
5S Rna ◽  
Plethodontid Salamanders ◽  
5S Rna Genes ◽  
Rna Genes

scholarly journals POPULATION ECOLOGY OF THE NORTHERN SLIMY SALAMANDER (PLETHODON GLUTINOSUS) IN EAST-CENTRAL ILLINOIS

2015 ◽  
pp. 17-21
Author(s):  
John A. Crawford ◽  
Andrew R. Kuhns ◽  
Mathys J. Meyer
Keyword(s):  
Population Density ◽  
Population Ecology ◽  
Demographic Data ◽  
Ecosystem Integrity ◽  
East Central ◽  
Plethodon Glutinosus ◽  
Capture Success ◽  
Plethodontid Salamanders ◽  
Management Plans ◽  
Central Illinois

The importance of plethodontid salamanders in forested habitats has been recognized for decades and more recently plethodontids have been touted as a model taxon for monitoring ecosystem integrity and recovery. However, basic demographic data that are crucial to conservation and management plans are currently lacking for many species and regions. The objectives of our study were to characterize the population density, biomass, and capture success of a peripheral population of Plethodon glutinosus to provide a comparison for eastern populations and set a baseline for future monitoring of Midwestern populations. We estimated the population density of P. glutinosus at our site to be 0.41 salamanders/m2, with an estimated biomass of 0.70 g/m2. We did not find any evidence for temperature or precipitation affecting capture success. Our results showed that our density estimate falls within the range of other population ecology studies of Plethodon and sets a baseline for other peripheral Midwestern populations.

scholarly journals PHYLOGENETIC EVIDENCE FOR A MAJOR REVERSAL OF LIFE-HISTORY EVOLUTION IN PLETHODONTID SALAMANDERS

Evolution ◽  
2004 ◽  
Vol 58 (12) ◽  
pp. 2809-2822 ◽  
Author(s):  
Paul T. Chippindale ◽  
Ronald M. Bonett ◽  
Andrew S. Baldwin ◽  
John J. Wiens
Keyword(s):  
Life History ◽  
Life History Evolution ◽  
Plethodontid Salamanders ◽  
History Evolution
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