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https://www.readbyqxmd.com/read/28630354/not-all-cells-are-equal-effects-of-temperature-and-sex-on-the-size-of-different-cell-types-in-the-madagascar-ground-gecko-paroedura-picta
#1
Marcin Czarnoleski, Anna Maria Labecka, Zuzana Starostová, Anna Sikorska, Elżbieta Bonda-Ostaszewska, Katarzyna Woch, Lukáš Kubička, Lukáš Kratochvíl, Jan Kozlowski
Cell size plays a role in evolutionary and phenotypically plastic changes in body size. To examine this role, we measured the sizes of seven cell types of geckos (Paroedura picta) reared at three constant temperatures (24, 27, and 30 °C). Our results show that the cell size varies according to the body size, sex and developmental temperature, but the pattern of this variance depends on the cell type. We identified three groups of cell types, and the cell sizes changed in a coordinated manner within each group...
June 19, 2017: Biology Open
https://www.readbyqxmd.com/read/28615488/hotter-nests-produce-hatchling-lizards-with-lower-thermal-tolerance
#2
Buddhi Dayananda, Brad R Murray, Jonathan K Webb
In many regions, the frequency and duration of summer heatwaves is predicted to increase in future. Hotter summers could result in higher temperatures inside lizard nests, potentially exposing embryos to thermally stressful conditions during development. Potentially, developmentally plastic shifts in thermal tolerance could allow lizards to adapt to climate warming. To determine how higher nest temperatures affect the thermal tolerance of hatchling geckos, we incubated eggs of the rock-dwelling velvet gecko, Amalosia lesueurii, at two fluctuating temperature regimes to mimic current nest temperatures (mean 23...
June 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28615483/gecko-youngsters-more-at-risk-after-incubating-during-a-heat-wave
#3
Kathryn Knight
No abstract text is available yet for this article.
June 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28610163/a-new-small-bent-toed-gecko-of-the-genus-i-cyrtodactylus-i-squamata-gekkonidae-from-the-lower-slopes-of-mount-tambora-sumbawa-island-indonesia
#4
Awal Riyanto, Mulyadi Mulyadi, Jimmy A McGuire, Mirza D Kusrini, Febylasmia Febylasmia, Irfan Haidar Basyir, Hinrich Kaiser
We describe the sixth species of bent-toed gecko from the Lesser Sunda Islands, Indonesia. This species was first collected on the banks of the Oi Marai River on the low northern slopes of Gunung (Mount) Tambora on Sumbawa Island. The new species is differentiated from Greater Sunda Islands (including Sulawesi) and Lesser Sunda Islands congeners by having the following unique combination of characters: (1) two scales between the second pair of postmentals in contact with the first pair; (2) dorsal surface of antebrachium tuberculate; (3) no tubercles on dorsal surface of brachium; (4) dorsal surfaces of thigh and crus tuberculate; (5) 18 irregularly aligned, longitudinal rows of keeled tubercles at midbody; (6) 26-27 paravertebral tubercles; (7) 40 ventral scales between indistinct ventrolateral folds; (8) 16-17 fourth-toe subdigital scales; (9) a continuous enlarged precloacal and femoral scales present, with the enlarged femoral scales arranged in three rows; (10) males with five to six precloacal pores, with four larger pores situated in a short groove; (11) femoral pores absent in both sexes; (12) lack of transversely enlarged subcaudal scales; and (13) 7-9 irregular, paired black blotches on the body...
March 13, 2017: Zootaxa
https://www.readbyqxmd.com/read/28610039/a-new-limestone-dwelling-leaf-toed-gecko-gekkonidae-i-dixonius-i-from-khao-sam-roi-yot-massif-peninsular-thailand
#5
Montri Sumontha, Nirut Chomngam, Eakarit Phanamphon, Parinya Pawangkhanant, Chutinton Viriyapanon, Wanlada Thanaprayotsak, Olivier S G Pauwels
We describe Dixonius kaweesaki sp. nov. from Khao Daeng, a limestone mountain in Khao Sam Roi Yot massif, Prachuap Khiri Khan Province, peninsular Thailand. It is diagnosed from all other species by a combination of maximal SVL of 41.6 mm; 12 or 13 longitudinal rows of dorsal tubercles; 24 longitudinal rows of ventrals across the abdomen; a continuous series of 9-11 precloacal pores in males, no pores in females; and two bold dark stripes from the snout to the base of the tail separated by a contrasting light vertebral stripe...
March 30, 2017: Zootaxa
https://www.readbyqxmd.com/read/28609895/a-new-species-of-rock-gecko-genus-cnemaspis-squamata-gekkonidae-from-western-sarawak-malaysia
#6
Takaki Kurita, Kanto Nishikawa, Masafumi Matsui, Tsutomu Hikida
A new species of Asian rock gecko, genus Cnemaspis, is described from Padawan, western Sarawak, Malaysian Borneo. The new species forms a clade with C. paripari and C. nigridia of the C. nigridia group in a mitochondrial DNA phylogeny and is similar to them morphologically in some characters such as caudal scalation. It differs from the other Asian Cnemaspis species in its unique combination of snout-vent length (up to 62.7 mm), 4-9 precloacal pores in males, keeled subcaudals with an enlarged, smooth, median row, presence of ventrolateral caudal tubercles, and coloration (head and upper flanks dark-yellow; anterior portion of tail black; posterior portion of tail white with black, paravertebral blob)...
May 3, 2017: Zootaxa
https://www.readbyqxmd.com/read/28572378/flexible-geckos
#7
Sacha Vignieri
No abstract text is available yet for this article.
June 2, 2017: Science
https://www.readbyqxmd.com/read/28558711/sarcoidosis-as-a-rare-cause-for-symmetrical-giant-bullous-disease
#8
Wolfgang Jungraithmayr, Elisa Leggeri, Walter Weder, Bart Vrugt
BACKGROUND: Sarcoidosis presents with typical clinic-radiological findings and shows histologically non-caseating granulomas. Pulmonary manifestations of sarcoidosis can be diverse, involving the intrathoracic lymph nodes and pulmonary parenchyma. CASE PRESENTATION: We here describe a case of a 35-year-old patient who presented with a history of exertion dyspnoea and coughing for the past 20 years. At the age of 15, she was exposed to smoke emanating from a fire...
May 30, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28555754/expression-patterns-of-sema3a-in-developing-amniote-limbs-with-reference-to-the-diversification-of-peripheral-nerve-innervation
#9
Kanami Noguchi, Ryota Ishikawa, Masahumi Kawaguchi, Kanako Miyoshi, Takahiko Kawasaki, Tatsumi Hirata, Makiko Fukui, Shigeru Kuratani, Mikiko Tanaka, Yasunori Murakami
Paired limbs were acquired in the ancestor of tetrapods and their morphology has been highly diversified in amniotes in relation to the adaptive radiation to the terrestrial environment. These morphological changes may have been induced by modification of the developmental program of the skeletal or muscular system. To complete limb modification, it is also important to change the neuronal framework, because the functions of the limbs rely on neural circuits that involve coordinated movement. Previous studies have shown that class 3 semaphorins (Sema3 semaphorins), which act as repulsive axonal guidance cues, play a crucial role in the formation of the peripheral nerves in mice...
May 29, 2017: Development, Growth & Differentiation
https://www.readbyqxmd.com/read/28553007/histology-and-ultrastructure-of-the-integumental-chromatophores-in-tokay-gecko-gekko-gecko-linnaeus-1758-skin
#10
Paweł Szydłowski, Jan Paweł Madej, Marta Mazurkiewicz-Kania
This paper describes the relationship between the arrangement of dermal chromatophores in tokay gecko (Gekko gecko) skin and the formation of wild-type colouration, with emphasis on the ultrastructure of chromatophores. The samples of the tokay gecko skin were collected from wild-type colouration adult specimens. Morphology and distribution of chromatophores was determined by using light microscopy and transmission electron microscopy. The present study revealed that orange/red coloured skin of G. gecko contained erythrophores, which were located under basement membrane, and usually comprised deeper situated iridophores and melanophores which were form single layer with iridophores or were occupying the deepest region of dermis...
2017: Zoomorphology
https://www.readbyqxmd.com/read/28539517/vocal-plasticity-in-a-reptile
#11
Henrik Brumm, Sue Anne Zollinger
Sophisticated vocal communication systems of birds and mammals, including human speech, are characterized by a high degree of plasticity in which signals are individually adjusted in response to changes in the environment. Here, we present, to our knowledge, the first evidence for vocal plasticity in a reptile. Like birds and mammals, tokay geckos (Gekko gecko) increased the duration of brief call notes in the presence of broadcast noise compared to quiet conditions, a behaviour that facilitates signal detection by receivers...
May 31, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28526989/first-molecular-detection-and-characterization-of-hepatozoon-and-sarcocystis-spp-in-field-mice-and-voles-from-japan
#12
Mohamed Abdallah Mohamed Moustafa, Michito Shimozuru, Wessam Mohamed, Kyle Rueben Taylor, Ryo Nakao, Mariko Sashika, Toshio Tsubota
Sarcocystis and Hepatozoon species are protozoan parasites that are frequently detected in domestic and wild animals. Rodents are considered common intermediate and paratenic hosts for several Sarcocystis and Hepatozoon species. Here, blood DNA samples from a total of six rodents, including one Myodes rutilus, one Myodes rufocanus, and four Apodemus speciosus, collected from Hokkaido, Japan, were shown by conventional PCR of the 18S ribosomal RNA (rRNA) gene to contain Sarcocystis and Hepatozoon DNA. Sequencing of the DNA detected one Sarcocystis sp...
May 19, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28507143/controllable-load-sharing-for-soft-adhesive-interfaces-on-three-dimensional-surfaces
#13
Sukho Song, Dirk-Michael Drotlef, Carmel Majidi, Metin Sitti
For adhering to three-dimensional (3D) surfaces or objects, current adhesion systems are limited by a fundamental trade-off between 3D surface conformability and high adhesion strength. This limitation arises from the need for a soft, mechanically compliant interface, which enables conformability to nonflat and irregularly shaped surfaces but significantly reduces the interfacial fracture strength. In this work, we overcome this trade-off with an adhesion-based soft-gripping system that exhibits enhanced fracture strength without sacrificing conformability to nonplanar 3D surfaces...
May 30, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28492374/a-miniaturized-wall-climbing-segment-robot-inspired-by-caterpillar-locomotion
#14
Il Hwan Han, Hoon Yi, Chang-Woo Song, Hoon Eui Jeong, Seung-Yop Lee
Caterpillars are very successful soft-bodied climbers that navigate in complex environments. This paper develops a multi-segmented robot climbing on vertical surfaces using dry adhesive pads, inspired by caterpillar locomotion. The miniaturized robot consists of four segments, and each segment uses a solenoid actuator with a permanent magnet plunger. The head and body segments adapt a novel mechanism and Scott-Russell linkages to generate a bi-directional plane motion using one solenoid actuator, resulting to reliable attaching and peeling motions of gecko pads...
June 15, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28486882/foot-preference-underlies-bite-scar-asymmetry-in-the-gecko-ptyodactylus-guttatus
#15
Guy Sion
Scar-asymmetry may reflect brain laterality because scar location may reflect behaviour when being attacked. This has been studied in a few organisms, but never in lizards. Wild geckos (Ptyodactylus guttatus) from Israel were examined for bite-scar numbers and their lateral asymmetry. Social status was documented in the field before capture. Foot-preference, for either the right (R-footed) or left (L-footed) hind leg was determined in six trials for each gecko on adults captured in Jerusalem. I studied 48 geckos: 15 R-footed, 6 ambidextrous and 9 L-footed females; 6 R-footed, 3 ambidextrous and 9 L-footed males...
May 9, 2017: Laterality
https://www.readbyqxmd.com/read/28484372/potential-involvement-of-snail-members-in-neuronal-survival-and-astrocytic-migration-during-the-gecko-spinal-cord-regeneration
#16
Tingting Shen, Yingjie Wang, Qing Zhang, Xue Bai, Sumei Wei, Xuejie Zhang, Wenjuan Wang, Ying Yuan, Yan Liu, Mei Liu, Xiaosong Gu, Yongjun Wang
Certain regenerative vertebrates such as fish, amphibians and reptiles are capable of regenerating spinal cord after injury. Most neurons of spinal cord will survive from the injury and regrow axons to repair circuits with an absence of glial scar formation. However, the underlying mechanisms of neuronal anti-apoptosis and glia-related responses have not been fully clarified during the regenerative process. Gecko has becoming an inspiring model to address spinal cord regeneration in amniotes. In the present study, we investigated the regulatory roles of Snail family members, the important transcriptional factors involved in both triggering of the cell migration and cell survival, during the spontaneous spinal cord regeneration...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28436994/erratum-influence-of-substrate-modulus-on-gecko-adhesion
#17
Mena R Klittich, Michael C Wilson, Craig Bernard, Rochelle M Rodrigo, Austin J Keith, Peter H Niewiarowski, Ali Dhinojwala
No abstract text is available yet for this article.
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28434199/repeated-evolution-of-digital-adhesion-in-geckos-a-reply-to-harrington-and-reeder
#18
Tony Gamble, Eli Greenbaum, Todd R Jackman, Anthony P Russell, Aaron M Bauer
We published a phylogenetic comparative analysis that found geckos had gained and lost adhesive toepads multiple times over their long evolutionary history (Gamble et al. 2012). This was consistent with decades of morphological studies showing geckos had evolved adhesive toepads on multiple occasions and that the morphology of geckos with ancestrally padless digits can be distinguished from secondarily padless forms. Recently, Harrington and Reeder (2017) reanalyzed data from Gamble et al. (2012) and found little support for the multiple origins hypothesis...
April 23, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28426409/a-new-species-of-oochoristica-cyclophyllidea-linstowiidae-from-non-native-mediterranean-geckos-hemidactylus-turcicus-sauria-gekkonidae-from-texas-usa
#19
Chris T McAllister, Charles R Bursey
A new species of cyclophyllidean tapeworm, Oochoristica harschi sp. nov. is described from 2 of 18 (11%) non-native Mediterranean geckos (Hemidactylus turcicus) collected in June 2016 from Tom Green County, Texas, USA The new species has few characteristics in common with 17 species of Oochoristica previously described from Nearctic reptiles. Of this group, O. harschi is most similar to O. macallisteri Bursey and Goldberg, 1996 from the side-blotched lizard, Uta stansburiana from Arizona and California, USA, in number of testes, 14-20 vs...
June 1, 2017: Acta Parasitologica
https://www.readbyqxmd.com/read/28426402/molecular-identification-of-thelandros-scleratus-and-thelastoma-icemi-nematoda-oxyruida-using-mitochondrial-cox-1-sequences
#20
Anshu Chaudhary, Garima Kansal, Neetu Singh, Kumari Shobhna, Manu Verma, Hridaya S Singh
Two species of parasitic nematodes collected from the intestine of Brook's House Gecko, Hemidactylus brooki and American cockroach, Periplaneta americana L. The parasites were identified as Thelandros scleratus and Thelastoma icemi by PCR amplification method. Subsequently, sequence analysis of mt cox1 (504 and 540 bp) for T. scleratus and T. icemi respectively revealed that these sequences showed maximum similarity of 90% (in case of T. scleratus), 77% (in case of T. icemi), to nematode sequences available on GenBank...
June 1, 2017: Acta Parasitologica
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