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Artigos de revistas sobre o tema "Geckos"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 25 de julho de 2025

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1

Hsu, Ping Yuan, Liehui Ge, Xiaopeng Li, et al. "Direct evidence of phospholipids in gecko footprints and spatula–substrate contact interface detected using surface-sensitive spectroscopy." Journal of The Royal Society Interface 9, no. 69 (2011): 657–64. http://dx.doi.org/10.1098/rsif.2011.0370.

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Observers ranging from Aristotle to young children have long marvelled at the ability of geckos to cling to walls and ceilings. Detailed studies have revealed that geckos are ‘sticky’ without the use of glue or suction devices. Instead, a gecko's stickiness derives from van der Waals interactions between proteinaceous hairs called setae and substrate. Here, we present surprising evidence that although geckos do not use glue, a residue is transferred on surfaces as they walk—geckos leave footprints . Using matrix-free nano-assisted laser desorption-ionization mass spectrometry, we identified th

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2

Barton, Diane P., Paolo Martelli, William Luk, Xiaocheng Zhu, and Shokoofeh Shamsi. "Infection of Hexametra angusticaecoides Chabaud & Brygoo, 1960 (Nematoda: Ascarididae) in a population of captive crested geckoes, Correlophus ciliatus Guichenot (Reptilia: Diplodactylidae)." Parasitology 147, no. 6 (2020): 673–80. http://dx.doi.org/10.1017/s0031182020000219.

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AbstractHere we report on the infection of captive crested geckos Correlophus ciliatus Guichenot (Reptilia: Diplodactylidae), with adults of the ascaridoid nematode, Hexametra angusticaecoides Chabaud & Brygoo, 1960 (Ascarididae). A population of captive crested geckoes became ill and died within a short period of time. Nematodes were recovered from the crested geckoes examined from within the coelomic cavity, penetrating various organs and migrating through subcutaneous tissues, as well as emerging through the geckos' skin. One gecko was treated with levamisole following surgical excision

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Stark, Alyssa Y., and Christopher T. Mitchell. "Stick or Slip: Adhesive Performance of Geckos and Gecko-Inspired Synthetics in Wet Environments." Integrative and Comparative Biology 59, no. 1 (2019): 214–26. http://dx.doi.org/10.1093/icb/icz008.

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Abstract The gecko adhesive system has inspired hundreds of synthetic mimics principally focused on replicating the strong, reversible, and versatile properties of the natural system. For geckos native to the tropics, versatility includes the need to remain attached to substrates that become wet from high humidity and frequent rain. Paradoxically, van der Waals forces, the principal mechanism responsible for gecko adhesion, reduce to zero when two contacting surfaces separate even slightly by entrapped water layers. A series of laboratory studies show that instead of slipping, geckos maintain

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4

Gao, Xue Shan, Jie Shao, Fu Quan Dai, Cheng Guo Zong, and Wen Zeng Guo. "A Gecko-Inspired Robot for Wind Power Tower Inspection." Applied Mechanics and Materials 461 (November 2013): 831–37. http://dx.doi.org/10.4028/www.scientific.net/amm.461.831.

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In order to accomplish the task of wind power tower inspection, a heavy-loaded climbing robot inspired by geckos is presented in this paper. The robot not only imitates body’s functions of geckos but also shows a design method. Wind power tower is a conical wall surface and its smallest radius is less than 2m. There will be a great gap when a robot climbing on such wall with small radius. The extraordinary climbing ability of geckos is considered as a remarkable design of nature that is attributed to its soft body, its multi-degree-of-freedom legs, and its strong-adsorbed toes. Focus on the fe

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5

Uetz, Peter, Alex Slavenko, Shai Meiri, and Matthew Heinicke. "Gecko diversity: a history of global discovery." Israel Journal of Ecology and Evolution 66, no. 3-4 (2020): 117–25. http://dx.doi.org/10.1163/22244662-bja10003.

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1935 gecko species (and 224 subspecies) were known in December 2019 in seven families and 124 genera. These nearly 2000 species were described by ~950 individuals of whom more than 100 described more than 10 gecko species each. Most gecko species were discovered during the past 40 years. The primary type specimens of all currently recognized geckos (including subspecies) are distributed over 161 collections worldwide, with 20 collections having about two thirds of all primary types. The primary type specimens of about 40 gecko taxa have been lost or unknown. The phylogeny of geckos is well stu

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6

Gusli, Tizar, Muhammad Alif Fauzi, Quraisy Zakky, Amir Hamidy, and Bambang Irawan. "Maturity and Reproductive Characteristics on Tokay Gecko (Gekko Gecko Linnaeus, 1758) From Java." Jurnal Biologi Indonesia 20, no. 1 (2024): 9–17. http://dx.doi.org/10.47349/jbi/20012024/9.

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One of the reptiles that massively exploited and traded for export commodities in Indonesia is the house gecko (Gekko gecko). Uncontrolled exploitation possibly threatened its wild population. Currently, there needs to be more biological information regarding this species. Thus, a biological approach is required to support a sustainable harvesting program, primarily through reproductive biology approaches. This study provided information about the minimum size for mature individuals of both sexes. We measured morphological characters and examined reproductive system of 136 males and 324 female

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7

Suwatik, Suwatik, Nenden Sri Wahyuni, Santi Mulyawati, et al. "Preliminary Study of Common House Gecko (Cosymbotus platyurus) Density in Java Island." International Journal of Research in Community Services 2, no. 4 (2021): 142–49. http://dx.doi.org/10.46336/ijrcs.v2i4.226.

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Common house gecko (Cosymbotus platyurus) is the most abundant house gecko species in Indonesia. The geckos live in home yard, garden, and in homes. It is part of food chain in its habitat, as its preys include cockroaches, flies, and termites. Previous studies found that this gecko are not found in mountainous area in West Java. In this study, the researchers observe population density of common house geckos in various types of habitats (houses and parks) with their home territory. The methods used were direct survey methods followed by literature study. The study is conducted in Java island

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8

Cahyani, Ni Kadek Dita, Kadek Andina Widiastuti, Muhammad Fakhri Fauzan, et al. "kay Gecko (Gekko gecko) in Bali Province, Indonesia." Jurnal Biologi Indonesia 19, no. 2 (2023): 125–33. http://dx.doi.org/10.47349/jbi/19022023/125.

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The tokay gecko (Gekko gecko) is known to be one of the species that plays an important role in the ecosystem, especially in controlling pest populations (locusts, mosquitoes, crickets and moths). Tokay geckos also have a high need for medical care purposes and pets. verexploitation and territorial conversion affect tokay gecko populations. this research to conduct a survey and extrapolation of the gecko population in Bali province. The survey was done through a visual survey of dating with three different methods; face-to-face video interview and meeting (IDVE), direct eye contact (DVE) and h

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9

Song, Yi, Zhendong Dai, Zhouyi Wang, and Robert J. Full. "Role of multiple, adjustable toes in distributed control shown by sideways wall-running in geckos." Proceedings of the Royal Society B: Biological Sciences 287, no. 1926 (2020): 20200123. http://dx.doi.org/10.1098/rspb.2020.0123.

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Remarkable progress has been made characterizing one of nature's most integrated, hierarchical structures––the fibrillar adhesive system of geckos. Nonetheless, we lack an understanding of how multiple toes coordinate to facilitate geckos' acrobatic locomotion. Here, we tested the control function of gecko toes by running them on vertical substrates varying in orientation, friction and roughness. Sideways wall-running geckos realigned the toes of their top feet upward to resist gravity. Toe contact area was not compromised, but redistributed. Geckos aligned all toes upward to resist slipping w

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10

Cord M, Brundage, Atamian Seza, and Vasquez Jessica. "Juvenile Crested Gecko (Correlophus ciliates) Growth Rate on a Calcium-dusted Dubia Roach and Papaya Diet Versus a Commercial Diet." International Journal of Veterinary Science and Research 10, no. 3 (2024): 029–33. http://dx.doi.org/10.17352/ijvsr.000147.

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Crested Geckos (Correlophus ciliatus) are common in the United States pet trade despite limited information on their specific physiology and nutrition. Suboptimal husbandry may be detrimental to animal growth, quality of life, and lifespan. Commercial diets are available; however, many hobbyists prefer feeding calcium-dusted fruit and insect alternatives. There is a general lack of published literature evaluating the effect of either option on gecko development. A food trial was conducted for 5 weeks on juvenile Crested Geckos fed a diet of calcium-dusted Dubia Roaches and fresh papaya (n = 30

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11

Muznebin, Farhana, Shanzida Islam, and Benzir Binte Lotif. "Prevalence and intensity of helminth parasites in House geckos (Hemidactylus frenatus) of Dhaka City at Bangladesh." Bangladesh Journal of Zoology 53, no. 1 (2025): 57–66. https://doi.org/10.3329/bjz.v53i1.82616.

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The Asian house gecko (Hemidactylus frenatus) is a unique species among lizards, commonly found in human habitats and often regarded as a pest. Like all vertebrates, these geckos are susceptible to parasites. In this investigation, a total of 54 H. frenatus specimens were collected from randomly selected households in various locations throughout Dhaka city to examine parasitic infections. The study's results revealed that 61.11% of the geckos were infected with endoparasites. The infection rate for female geckos (63.64%) was higher than that for males (59.38%). A total of 61 parasites were co

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12

Hu, Shihao, Stephanie Lopez, Peter H. Niewiarowski, and Zhenhai Xia. "Dynamic self-cleaning in gecko setae via digital hyperextension." Journal of The Royal Society Interface 9, no. 76 (2012): 2781–90. http://dx.doi.org/10.1098/rsif.2012.0108.

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Gecko toe pads show strong adhesion on various surfaces yet remain remarkably clean around everyday contaminants. An understanding of how geckos clean their toe pads while being in motion is essential for the elucidation of animal behaviours as well as the design of biomimetic devices with optimal performance. Here, we test the self-cleaning of geckos during locomotion. We provide, to our knowledge, the first evidence that geckos clean their feet through a unique dynamic self-cleaning mechanism via digital hyperextension. When walking naturally with hyperextension, geckos shed dirt from their

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13

Muammar Kadafi, Ahmad, Muhammad Alif Fauzi, Ari Ardiantoro, et al. "Low genetic diversity of the Indonesian Tokay Gecko (Gekko gecko) (Reptilia: Gekkonidae): Introduce or Native?" Jurnal Biologi Indonesia 20, no. 1 (2024): 63–75. http://dx.doi.org/10.47349/jbi/2012024/63.

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This study investigates the genetic diversity and distribution patterns of the Tokay gecko (Gekko gecko) in Indonesia. Using the NADH2 sequence, we analyzed 26 samples from various Indonesian localities and 78 sequence data from other regions, including China, Vietnam, Myanmar, Laos, Cambodia, Thailand, Malaysia, Timor, and the United States. Phylogenetic analyses using Maximum Likelihood and Bayesian Inferences revealed similar topologies and identified four distinct lineages with strong support values. Remarkably, Indonesian Tokay geckos clustered into a single lineage, exhibiting low geneti

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14

Gumbs, Rikki, Rachel C. Williams, Anthony M. Lowney, and Darrell Smith. "Spatial and species-level metrics reveal global patterns of irreplaceable and imperiled gecko phylogenetic diversity." Israel Journal of Ecology and Evolution 66, no. 3-4 (2020): 239–52. http://dx.doi.org/10.1163/22244662-bja10020.

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Abstract Phylogenetic Diversity (PD) is increasingly recognised as a useful tool for prioritising species and regions for conservation effort. Increased availability of spatial and phylogenetic data for reptiles now facilitates their inclusion in phylogenetically-informed conservation prioritisation efforts. Geckos are a highly divergent and diverse clade that comprises almost 20% of global reptile diversity. Their global distribution is coincident with numerous anthropogenic threats, making them worthy of conservation prioritisation. Here, we combine phylogenetic, spatial distribution and ext

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15

Meiri, Shai. "What geckos are – an ecological-biogeographic perspective." Israel Journal of Ecology and Evolution 66, no. 3-4 (2019): 253–63. http://dx.doi.org/10.1163/22244662-20191075.

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Geckos are a hyper-diverse, ancient, and globally distributed group. They have diverged early from other squamates and thus can be expected to differ from them along multiple ecological, life history, and biogeographic axes. I review a wide range of gecko traits, comparing them to those of other lizard taxa, to identify the unique, and unifying, attributes of geckos among lizards, based on comprehensive databases of lizard distributions and biological attributes. Few traits completely separate geckos from other lizard taxa, yet they differ to a large degree along many axes: they are more restr

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16

J.A, Najafov, and Hashimova AR. "Comparative Analysis OfThe Morphological Features OfThe Caspian Bent-Toed Gecko-Tenuidactylus Caspius (Eichwald, 1831) In The Urbanized Territories Of The Absheron Peninsula." Journal of Life Sciences and Biomedicine 73, no. 1 (2018): 110–15. https://doi.org/10.5281/zenodo.7764447.

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A comparative analysis ofthe morphological features of the Caspian Bent-toed Gecko in the urbanized territories of the Absheron peninsula has been performed. was established that the tails of geckoes living on the Caspian coast are shorter than in geckos liing in residential buildings. Due to the fact that movement and nutrition of the gecko inhabiting urbanized areas occur on yertical surfaces (on the walls of houses) elongation of the tail plays an important role in balancing the body of the animal. Along with the elongation of the tail, a change in the density of the scaly cover was also no

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17

Stewart, William J., and Timothy E. Higham. "Passively stuck: death does not affect gecko adhesion strength." Biology Letters 10, no. 12 (2014): 20140701. http://dx.doi.org/10.1098/rsbl.2014.0701.

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Many geckos use adhesive toe pads on the bottom of their digits to attach to surfaces with remarkable strength. Although gecko adhesion has been studied for hundreds of years, gaps exist in our understanding at the whole-animal level. It remains unclear whether the strength and maintenance of adhesion are determined by the animal or are passively intrinsic to the system. Here we show, for the first time, that strong adhesion is produced passively at the whole-animal level. Experiments on both live and recently euthanized tokay geckos ( Gekko gecko ) revealed that death does not affect the dyna

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18

Cermakova, E., M. Oliveri, Z. Knotkova, and Z. Knotek. "Effect of a GnRH agonist (deslorelin) on ovarian activity in leopard geckos (Eublepharis macularius)." Veterinární Medicína 64, No. 5 (2019): 228–30. http://dx.doi.org/10.17221/167/2018-vetmed.

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The aim of this study was to evaluate the effectiveness of deslorelin acetate in the regulation of reproductive activity in captive leopard geckos (Eublepharis macularius). Fourteen healthy adult females were separated into two groups. Under general anaesthesia, deslorelin acetate implants (4.7 mg) or placebo implants were administered into the coelom of ten female geckos and four female geckos, respectively. One healthy adult male Leopard gecko was added to each group of females (five females with GnRH implants and two females with placebo implants). The geckos were regularly monitored over t

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19

Shang, Lei, Wen Bo Wang, Ting Ting Liu, Lei Cai, Hao Wang, and Zhen Dong Dai. "An Equipment Used for Studying the Vestibular Perception of Gekko gecko." Applied Mechanics and Materials 461 (November 2013): 570–76. http://dx.doi.org/10.4028/www.scientific.net/amm.461.570.

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The study of vestibule neurons specific firing mode of Gekko gecko under stimulus of different angles and rotating speeds has an important theoretical significance to reveal the control mechanism of Gekko geckos vestibular position as well as to the development of gecko-robots. A vari-angle rotating equipment was made to give different stimulus in study of Gekko geckos vestibular electrophysiology. The equipment mainly consisted of four parts as follows: fastening panel for stereotaxic instrument, shaft locking device, counterweight, driving system. The shaft locking device and counterweight r

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Liu, Yanwei, Hao Wang, Jiangchao Li, Pengyang Li, and Shujuan Li. "Gecko-Inspired Controllable Adhesive: Structure, Fabrication, and Application." Biomimetics 9, no. 3 (2024): 149. http://dx.doi.org/10.3390/biomimetics9030149.

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The gecko can achieve flexible climbing on various vertical walls and even ceilings, which is closely related to its unique foot adhesion system. In the past two decades, the mechanism of the gecko adhesion system has been studied in-depth, and a verity of gecko-inspired adhesives have been proposed. In addition to its strong adhesion, its easy detachment is also the key to achieving efficient climbing locomotion for geckos. A similar controllable adhesion characteristic is also key to the research into artificial gecko-inspired adhesives. In this paper, the structures, fabrication methods, an

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Higham, Timothy E., Anthony P. Russell, and Karl J. Niklas. "Leaping lizards landing on leaves: escape-induced jumps in the rainforest canopy challenge the adhesive limits of geckos." Journal of The Royal Society Interface 14, no. 131 (2017): 20170156. http://dx.doi.org/10.1098/rsif.2017.0156.

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The remarkable adhesive capabilities of geckos have garnered attention from scientists and the public for centuries. Geckos are known to have an adhesive load-bearing capacity far in excess (by 100-fold or more) of that required to support their body mass or accommodate the loading imparted during maximal locomotor acceleration. Few studies, however, have investigated the ecological contexts in which geckos use their adhesive system and how this may influence its properties. Here we develop a modelling framework to assess whether their prodigious adhesive capacity ever comes under selective ch

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22

Izadi, Hadi, Katherine M. E. Stewart, and Alexander Penlidis. "Role of contact electrification and electrostatic interactions in gecko adhesion." Journal of The Royal Society Interface 11, no. 98 (2014): 20140371. http://dx.doi.org/10.1098/rsif.2014.0371.

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Geckos, which are capable of walking on walls and hanging from ceilings with the help of micro-/nano-scale hierarchical fibrils (setae) on their toe pads, have become the main prototype in the design and fabrication of fibrillar dry adhesives. As the unique fibrillar feature of the toe pads of geckos allows them to develop an intimate contact with the substrate the animal is walking on or clinging to, it is expected that the toe setae exchange significant numbers of electric charges with the contacted substrate via the contact electrification (CE) phenomenon. Even so, the possibility of the oc

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Gulimova, Victoria, Alexandra Proshchina, Anastasia Kharlamova, et al. "Reptiles in Space Missions: Results and Perspectives." International Journal of Molecular Sciences 20, no. 12 (2019): 3019. http://dx.doi.org/10.3390/ijms20123019.

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Reptiles are a rare model object for space research. However, some reptile species demonstrate effective adaptation to spaceflight conditions. The main scope of this review is a comparative analysis of reptile experimental exposure in weightlessness, demonstrating the advantages and shortcomings of this model. The description of the known reptile experiments using turtles and geckos in the space and parabolic flight experiments is provided. Behavior, skeletal bones (morphology, histology, and X-ray microtomography), internal organs, and the nervous system (morphology, histology, and immunohist

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Wang, Hao, Wenbo Wang, Yi Song, Lei Cai, and Zhendong Dai. "Passive Cushiony Biomechanics of Head Protection in Falling Geckos." Applied Bionics and Biomechanics 2018 (2018): 1–7. http://dx.doi.org/10.1155/2018/9857894.

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Gekko geckos are capable to crawl on the steep even on upside-down surfaces. Such movement, especially at great altitude, puts them at high risks of incidentally dropping down and inevitable body or head impactions, though they may trigger air-righting reaction (ARR) to attenuate the landing shocks. However, the air-righting ability (ARA) in Gekko geckos is not fully developed. The implementation of ARR in some geckos is quite slow; and for those without tails, the ARR is even unobservable. Since ARA is compromised in Gekko geckos, there must be some other mechanisms responsible for protecting

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Shao, Donghao, Zhouyi Wang, Aihong Ji, Zhendong Dai, and Poramate Manoonpong. "A gecko-inspired robot with CPG-based neural control for locomotion and body height adaptation." Bioinspiration & Biomimetics 17, no. 3 (2022): 036008. http://dx.doi.org/10.1088/1748-3190/ac5a3c.

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Abstract Today’s gecko-inspired robots have shown the ability of omnidirectional climbing on slopes with a low centre of mass. However, such an ability cannot efficiently cope with bumpy terrains or terrains with obstacles. In this study, we developed a gecko-inspired robot (Nyxbot) with an adaptable body height to overcome this limitation. Based on an analysis of the skeletal system and kinematics of real geckos, the adhesive mechanism and leg structure design of the robot were designed to endow it with adhesion and adjustable body height capabilities. Neural control with exteroceptive sensor

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Shine, Richard, Jonathan K. Webb, Mark Fitzgerald, and Joanna Sumner. "The impact of bush-rock removal on an endangered snake species, Hoplocephalus bungaroides (Serpentes : Elapidae)." Wildlife Research 25, no. 3 (1998): 285. http://dx.doi.org/10.1071/wr97022.

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We examined the impact of habitat degradation (removal of surface rocks) on an endangered snake species (Hoplocephalus bungaroides, Elapidae) at 23 sites in south-eastern Australia, by quantifying the impact of rock removal on (i) the availability of suitable shelter-sites for the snakes and their major prey species (the velvet gecko, Oedura lesueurii), and (ii) the numbers of snakes and geckos. Our survey showed that both the snakes and the geckos prefer rocks lying on other rocks, rather than on soil, and select rocks of particular sizes. The rocks removed by bush-rock collectors overlap con

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Gamble, Tony. "Duplications in Corneous Beta Protein Genes and the Evolution of Gecko Adhesion." Integrative and Comparative Biology 59, no. 1 (2019): 193–202. http://dx.doi.org/10.1093/icb/icz010.

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Abstract Corneous proteins are an important component of the tetrapod integument. Duplication and diversification of keratins and associated proteins are linked with the origin of most novel integumentary structures like mammalian hair, avian feathers, and scutes covering turtle shells. Accordingly, the loss of integumentary structures often coincides with the loss of genes encoding keratin and associated proteins. For example, many hair keratins in dolphins and whales have become pseudogenes. The adhesive setae of geckos and anoles are composed of both intermediate filament keratins (IF-kerat

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Fang, Shengchang, Guisong Chen, Tong Liu, Weimian Zhou, Yucheng Wang, and Xiaojie Wang. "Role of Tail Dynamics on the Climbing Performance of Gecko-Inspired Robots: A Simulation and Experimental Study." Biomimetics 9, no. 10 (2024): 625. http://dx.doi.org/10.3390/biomimetics9100625.

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Geckos are renowned for their exceptional climbing abilities, enabled by their specialized feet with hairy toes that attach to surfaces using van der Waals forces. Inspired by these capabilities, various gecko-like robots have been developed for high-risk applications, such as search and rescue. While most research has focused on adhesion mechanisms, the gecko’s tail also plays a critical role in maintaining balance and stability. In this study, we systematically explore the impact of tail dynamics on the climbing performance of gecko-inspired robots through both simulation and experimental an

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Birn-Jeffery, Aleksandra V., and Timothy E. Higham. "Geckos significantly alter foot orientation to facilitate adhesion during downhill locomotion." Biology Letters 10, no. 10 (2014): 20140456. http://dx.doi.org/10.1098/rsbl.2014.0456.

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Geckos employ their adhesive system when moving up an incline, but the directionality of the system may limit function on downhill surfaces. Here, we use a generalist gecko to test whether limb modulation occurs on downhill slopes to allow geckos to take advantage of their adhesive system. We examined three-dimensional limb kinematics for geckos moving up and down a 45° slope. Remarkably, the hind limbs were rotated posteriorly on declines, resulting in digit III of the pes facing a more posterior direction (opposite to the direction of travel). No significant changes in limb orientation were

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Powell, Robert, Robert Henderson, Cory Lindsay, and Saul Nava. "Microhabitat, activity, and density of a dwarf gecko (Sphaerodactylus parvus) on Anguilla, West Indies." Amphibia-Reptilia 22, no. 4 (2001): 455–64. http://dx.doi.org/10.1163/15685380152770417.

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AbstractSphaerodactylus parvus is a dwarf gecko endemic to the Anguilla Bank in the Lesser Antilles, West Indies. Aspects of S. parvus ecology were studied at six sites on Anguilla. Geckos were encountered most frequently in association with rock spills, and gecko population densities (0-5.2/m2) were correlated positively with rock densities. A disproportionate number of rocks which harbored S. parvus were on complex substrates of smaller rocks, leaf litter, and small sticks. Geckos became active in the late afternoon and early evening (after air temperature dropped below under-rock temperatur

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Webb, Jonathan K., Weiguo Du, David Pike, and Richard Shine. "Generalization of predator recognition: Velvet geckos display anti-predator behaviours in response to chemicals from non-dangerous elapid snakes." Current Zoology 56, no. 3 (2010): 337–42. http://dx.doi.org/10.1093/czoolo/56.3.337.

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Abstract Many prey species detect chemical cues from predators and modify their behaviours in ways that reduce their risk of predation. Theory predicts that prey should modify their anti-predator responses according to the degree of threat posed by the predator. That is, prey should show the strongest responses to chemicals of highly dangerous prey, but should ignore or respond weakly to chemicals from non-dangerous predators. However, if anti-predator behaviours are not costly, and predators are rarely encountered, prey may exhibit generalised antipredator behaviours to dangerous and non-dang

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Niewiarowski, Peter H., Ali Dhinojwala, and Austin M. Garner. "A Physical Model Approach to Gecko Adhesion Opportunity and Constraint: How Rough Could It Be?" Integrative and Comparative Biology 59, no. 1 (2019): 203–13. http://dx.doi.org/10.1093/icb/icz029.

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AbstractIt has been nearly 20 years since Autumn and colleagues established the central role of van der Waals intermolecular forces in how geckos stick. Much has been discovered about the structure and function of fibrillar adhesives in geckos and other taxa, and substantial success has been achieved in translating natural models into bioinspired synthetic adhesives. Nevertheless, synthetics still cannot match the multidimensional performance observed in the natural gecko system that is simultaneously robust to dirt and water, resilient over thousands of cycles, and purportedly competent on su

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Whitford, Malachi D., Grace A. Freymiller, Timothy E. Higham, and Rulon W. Clark. "Shaking things up: the unique feeding behaviour of western banded geckos when consuming scorpions." Biological Journal of the Linnean Society 135, no. 3 (2022): 533–40. http://dx.doi.org/10.1093/biolinnean/blab167.

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Abstract Predators that feed on dangerous prey species must evolve mechanisms to reduce the likelihood of injury or death during a predation attempt. Scorpions are prime examples of dangerous prey items for insectivores, because they can inflict a venomous and potentially fatal sting when attacked. Despite this risk, the western banded gecko (Coleonyx variegatus), a generalist insectivore, occasionally preys on dune scorpions (Smeringurus mesaensis). We use high-speed videography to examine the modulation of prey capture biomechanics in relationship to prey type. The capture of undefended evas

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MOCKETT, SARAH, TRENT BELL, ROBERT POULIN, and FÁTIMA JORGE. "The diversity and evolution of nematodes (Pharyngodonidae) infecting New Zealand lizards." Parasitology 144, no. 5 (2016): 680–91. http://dx.doi.org/10.1017/s0031182016002365.

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SUMMARYHost–parasite co-evolutionary studies can shed light on diversity and the processes that shape it. Molecular methods have proven to be an indispensable tool in this task, often uncovering unseen diversity. This study used two nuclear markers (18S rRNA and 28S rRNA) and one mitochondrial (cytochrome oxidase subunit I) marker to investigate the diversity of nematodes of the family Pharyngodonidae parasitizing New Zealand (NZ) lizards (lygosomine skinks and diplodactylid geckos) and to explore their co-evolutionary history. A Bayesian approach was used to infer phylogenetic relationships o

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Higham, Timothy E., Anthony P. Russell, Peter H. Niewiarowski, Amber Wright, and Thomas Speck. "The Ecomechanics of Gecko Adhesion: Natural Surface Topography, Evolution, and Biomimetics." Integrative and Comparative Biology 59, no. 1 (2019): 148–67. http://dx.doi.org/10.1093/icb/icz013.

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Abstract The study of gecko adhesion is necessarily interdisciplinary due to the hierarchical nature of the adhesive system and the complexity of interactions between the animals and their habitats. In nature, geckos move on a wide range of surfaces including soft sand dunes, trees, and rocks, but much of the research over the past two decades has focused on their adhesive performance on artificial surfaces. Exploring the complex interactions between geckos and their natural habitats will reveal aspects of the adhesive system that can be applied to biomimetic research, such as the factors that

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Amadi, Nioking, Golden Chizi Gladstone, Chimela Wala, Leonardo Vignoli, Adaobi Ugbomeh, and Luca Luiselli. "Habitat use and food habitats of a gecko population in a west African suburban area." European Journal of Ecology 6, no. 1 (2020): 1–12. http://dx.doi.org/10.17161/eurojecol.v6i1.13316.

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1.The spatial and trophic ecology of Afrotropical gecko populations are poorly known. Here, we report ecological observations on Brook’s House Gecko (Hemidactylus angulatus), a widespread gekkonid species, in the Rivers State University of Science and Technology campus, Port Harcourt, Nigeria.2. A total of 488 gecko individuals were recorded during the present study, in two surveyed habitat types: (i) plantationm trees (PTH) and (ii) buildings (BDH). In PTH, they were observed in 13 out of 15 species of trees present in the study area, with their (log) frequency of sightings being positively c

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Keating, Shannon E., Madison Blumer, L. Lee Grismer, et al. "Sex Chromosome Turnover in Bent-Toed Geckos (Cyrtodactylus)." Genes 12, no. 1 (2021): 116. http://dx.doi.org/10.3390/genes12010116.

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Lizards and snakes (squamates) are known for their varied sex determining systems, and gecko lizards are especially diverse, having evolved sex chromosomes independently multiple times. While sex chromosomes frequently turnover among gecko genera, intrageneric turnovers are known only from Gekko and Hemidactylus. Here, we used RADseq to identify sex-specific markers in two species of Burmese bent-toed geckos. We uncovered XX/XY sex chromosomes in Cyrtodactylus chaunghanakwaensis and ZZ/ZW sex chromosomes in Cyrtodactylus pharbaungensis. This is the third instance of intrageneric turnover of se

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Wang, Xiaoqing, Wenbo Wang, and Zhendong Dai. "The Neural Control Mechanisms of Gekkonid Adhesion Locomotion: The Effect of Spinal Cord Lesions." Biomimetics 7, no. 3 (2022): 98. http://dx.doi.org/10.3390/biomimetics7030098.

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Objective: the role of the supraspinal system in the neural control mechanisms of adhesion locomotor pattern formation was studied in lizard Gekko gecko. Methods: the locomotor performance and adaptation of the chronically lesioned Gekko gecko was documented before and after either partial or complete spinal lesions. They were filmed moving on a flat and smooth platform that was inclined at 0°, ±45°, and ±90°, as well as the horizontal mats and the vertical oak background board in the terraria, to evaluate locomotor functional recovery. The geckos were also tested on the platform by two half a

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Withers, P. C., K. P. Aplin, and Y. L. Werner. "Metabolism and evaporative water loss of Western Australian geckos (Reptilia : Sauria : Gekkonomorpha)." Australian Journal of Zoology 48, no. 2 (2000): 111. http://dx.doi.org/10.1071/zo99007.

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Resting metabolic rate (RMR) and evaporative water loss (EWL) were measured, and resistance (R) to evaporative water loss and water use index (WUI = EWL/RMR) were calculated, for 22 species of Western Australian gecko. For all available gecko data, body mass and temperature explained 85% of the variability in RMR (=14.5 mass0.833 100.0398 Ta µL h–1), and 70% of the variability in EWL (=0.126 mass0.539 100.049 Ta mg h–1 ). For Western Australian geckos, RMR and EWL were significantly influenced by body mass, using conventional regression and phylogenetic analyses. Resistance to evaporative wate

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Schwarz, Rachel, Gavin Stark, Antonis Antonopolous, et al. "Specialist versus Generalist at the Intraspecific Level: Functional Morphology and Substrate Preference of Mediodactylus kotschyi Geckos." Integrative and Comparative Biology 61, no. 1 (2021): 62–75. http://dx.doi.org/10.1093/icb/icab066.

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Synopsis Populations of the same species occupying different microhabitats can either exhibit generalized traits across them or display intraspecific variability, adapting to each microhabitat in order to maximize performance. Intraspecific variability contributes to the generation of diversity, following selection and adaptation, and understanding such variability is important for comprehending how individuals choose their microhabitats. Compared with interspecific variability, however, intraspecific variability in functional morphology and its relationship with microhabitat preference and us

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ARNOLD, E. NICHOLAS, and GEORGE POINAR. "A 100 million year old gecko with sophisticated adhesive toe pads, preserved in amber from Myanmar." Zootaxa 1847, no. 1 (2008): 62. http://dx.doi.org/10.11646/zootaxa.1847.1.5.

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A new genus and species of gecko is described from a posterior lower limb and foot, and a partial tail, preserved in Lower Cretaceous amber from Myanmar that is 97–110My old. It appears to be the oldest unequivocal fossil gecko, predating fragmentary skeletal remains from the Upper Cretaceous and being 43–56 My older than Yanatarogecko from the Lower Eocene, previously the oldest known gecko preserved in amber. It also provides firm evidence that gekkotans and possibly gekkonids were in Asia at this time. The Myanmar specimen shows, that the distinctive foot proportions and sophisticated adhes

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Peattie, Anne M., Carmel Majidi, Andrew Corder та Robert J. Full. "Ancestrally high elastic modulus of gecko setal β-keratin". Journal of The Royal Society Interface 4, № 17 (2007): 1071–76. http://dx.doi.org/10.1098/rsif.2007.0226.

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Typical bulk adhesives are characterized by soft, tacky materials with elastic moduli well below 1 MPa. Geckos possess subdigital adhesives composed mostly of β-keratin, a relatively stiff material. Biological adhesives like those of geckos have inspired empirical and modelling research which predicts that even stiff materials can be effective adhesives if they take on a fibrillar form. The molecular structure of β-keratin is highly conserved across birds and reptiles, suggesting that material properties of gecko setae should be similar to that of β-keratin previously measured in birds, but th

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Stark, Gavin, Rachel Schwarz, and Shai Meiri. "Does nocturnal activity prolong gecko longevity?" Israel Journal of Ecology and Evolution 66, no. 3-4 (2020): 231–38. http://dx.doi.org/10.1163/22244662-20191074.

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The majority of lizard clades are ancestrally and predominantly diurnal. The only major taxon in which most species are nocturnal is the Gekkota (geckos and pygopodids). As ectothermic thermoregulators, lizard metabolic rates are highly temperature dependent, and diurnal lizards therefore demonstrate higher metabolic rates than nocturnal ones. Furthermore, exposure to solar radiation is thought to reduce ectothermic longevity by increasing both metabolic costs and the rate of accumulating harmful mutations through UV radiation (UVC specifically). In being nocturnal, ectothermic species may red

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Wulansari, Dewi, and Tubagus Mulyadi. "EKOKRITIKISME KOREOGRAFI SATU MILIAR TOKEK KARYA AYU TITIS RUKMANA SARI." Greget 20, no. 1 (2022): 58–72. http://dx.doi.org/10.33153/grt.v20i1.4035.

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Satu Miliar Tokek by Ayu Titis Rukmana Sari, was inspired by the phenomenon of the Kedung Monggo community towards the price of a billion geckos. This phenomenon has an impact on the burning of the banyan tree where the gecko resides. This research has the problem of how to choreograph one billion geckos and how to ecocriticism in the work of one billion geckos. To answer the problem of choreography, Slamet Md's concept of dance formation consists of motion, rhythm, expression, or feeling, costumes, stage, and dancers. To explore ecocriticism, the opinion of F.X. Widaryanto. The manifestation

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Rams-Pociecha, Izabela, Paulina C. Mizia, and Rafal P. Piprek. "Histological Analysis of Gonadal Ridge Development and Sex Differentiation of Gonads in Three Gecko Species." Biology 13, no. 1 (2023): 7. http://dx.doi.org/10.3390/biology13010007.

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Reptiles constitute a highly diverse group of vertebrates, with their evolutionary lineages having diverged relatively early. The types of sex determination exemplify the diversity of reptiles; however, there are limited data regarding the gonadal development in squamate reptiles. Geckos constitute a group that is increasingly used in research and that serves as a potential reptilian model organism. The aim of this study was to trace the changes in the structure of developing gonads in the embryos of three gecko species: the crested gecko, leopard gecko, and mourning gecko. These species repre

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Pensabene, Eleonora, Lukáš Kratochvíl, and Michail Rovatsos. "Independent Evolution of Sex Chromosomes in Eublepharid Geckos, A Lineage with Environmental and Genotypic Sex Determination." Life 10, no. 12 (2020): 342. http://dx.doi.org/10.3390/life10120342.

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Geckos demonstrate a remarkable variability in sex determination systems, but our limited knowledge prohibits accurate conclusions on the evolution of sex determination in this group. Eyelid geckos (Eublepharidae) are of particular interest, as they encompass species with both environmental and genotypic sex determination. We identified for the first time the X-specific gene content in the Yucatán banded gecko, Coleonyx elegans, possessing X1X1X2X2/X1X2Y multiple sex chromosomes by comparative genome coverage analysis between sexes. The X-specific gene content of Coleonyx elegans was revealed

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Russell, Anthony P., and Aaron M. Bauer. "The morphology of the digits of the golden gecko, Calodactylodes aureus and its implications for the occupation of rupicolous habitats." Amphibia-Reptilia 10, no. 2 (1989): 125–40. http://dx.doi.org/10.1163/156853889x00160.

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AbstractThe recent rediscovery of the golden gecko, Calodactylodes aureus, after more than 100 years, has given occasion to reconsider both its phylogenetic position amongst the gekkonine geckos and the functional aspects of its subdigital pads. The morphology of these pads and the anatomical basis of their control suggests that Afroedura among a grouping of gekkonine geckos with phenetically similar digits, shows the greatest structural similarity to Calodactylodes. Available data do not support a robust hypothesis of actual relationship between these two genera, but if relationship is not th

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Babatunde, Olugbenga Samuel, Titus Adeniyi Olusi, Iyabo Adepeju Simon-Oke, Monday David, Blessing Adejoh, and Akinbode Ayekooto Olonisakin. "Prevalence of Ecto- and Gastrointestinal Parasites of Hemidactylus frenatus (Schlegel) in Akure North Local Government Area of Ondo State, Nigeria." Journal of Applied Life Sciences International 28, no. 3 (2025): 44–53. https://doi.org/10.9734/jalsi/2025/v28i3689.

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The wall gecko is found in tropical, subtropical, and warm temperate regions. It is a nocturnal species that seeks shelter during the daytime and emerges at dusk to forage throughout the night. This small lizard has become established in areas near human habitation in the tropics, forming a close association with people. Like other vertebrates, wall geckos are susceptible to parasitism. This study investigated the prevalence and intensity of ecto- and gastrointestinal parasites infecting Hemidactylus frenatus (wall geckos) in Akure North Local Government Area, Ondo State, Nigeria. A total of 3

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Fakhri Fauzan, Muhammad, Quraisy Zakky, Ibnu Hibban Hartono, Awal Riyanto, and Amir Hamidy. "Habitat Preference and Population Study of House Gecko (Gekko gecko) in Seribu Islands, Special Capital Region of Jakarta." Jurnal Biologi Indonesia 18, no. 2 (2022): 205–12. http://dx.doi.org/10.47349/jbi/18022022/205.

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The house gecko (Gekko gecko) or tokek is a reptile species known widely used as an export commodity. Overexploitation can threaten wild populations of tokek in the wild. The research was conducted through a Visual Encounter Survey on the islands of Tidung, Pari, and Untung Jawa from 27 November to 02 December 2021. We also distributed questionnaires about the insight and presence of geckos in residents' homes or buildings. The number of respondents have been interviewed are 117 people, while for direct observation the results obtained are 273 individuals. The highest number of geckos was foun

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Russell, Anthony P., Alyssa Y. Stark, and Timothy E. Higham. "The Integrative Biology of Gecko Adhesion: Historical Review, Current Understanding, and Grand Challenges." Integrative and Comparative Biology 59, no. 1 (2019): 101–16. http://dx.doi.org/10.1093/icb/icz032.

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Abstract Geckos are remarkable in their ability to reversibly adhere to smooth vertical, and even inverted surfaces. However, unraveling the precise mechanisms by which geckos do this has been a long process, involving various approaches over the last two centuries. Our understanding of the principles by which gecko adhesion operates has advanced rapidly over the past 20 years and, with this knowledge, material scientists have attempted to mimic the system to create artificial adhesives. From a biological perspective, recent studies have examined the diversity in morphology, performance, and r

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