keyword
MENU ▼
Read by QxMD icon Read
search

Turtle

keyword
https://www.readbyqxmd.com/read/28223917/gene-expression-profiling-in-the-injured-spinal-cord-of-trachemys-scripta-elegans-an-amniote-with-self-repair-capabilities
#1
Adrián Valentin-Kahan, Gabriela B García-Tejedor, Carlos Robello, Omar Trujillo-Cenóz, Raúl E Russo, Fernando Alvarez-Valin
Slider turtles are the only known amniotes with self-repair mechanisms of the spinal cord that lead to substantial functional recovery. Their strategic phylogenetic position makes them a relevant model to investigate the peculiar genetic programs that allow anatomical reconnection in some vertebrate groups but are absent in others. Here, we analyze the gene expression profile of the response to spinal cord injury (SCI) in the turtle Trachemys scripta elegans. We found that this response comprises more than 1000 genes affecting diverse functions: reaction to ischemic insult, extracellular matrix re-organization, cell proliferation and death, immune response, and inflammation...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28219019/inferring-physiological-energetics-of-loggerhead-turtle-caretta-caretta-from-existing-data-using-a-general-metabolic-theory
#2
Nina Marn, S A L M Kooijman, Marko Jusup, Tarzan Legović, Tin Klanjšček
Loggerhead turtle is an endangered sea turtle species with a migratory lifestyle and worldwide distribution, experiencing markedly different habitats throughout its lifetime. Environmental conditions, especially food availability and temperature, constrain the acquisition and the use of available energy, thus affecting physiological processes such as growth, maturation, and reproduction. These physiological processes at the population level determine survival, fecundity, and ultimately the population growth rate-a key indicator of the success of conservation efforts...
February 3, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/28218789/polyandrous-behavior-in-an-overexploited-giant-south-american-turtle-podocnemis-expansa-population-in-central-amazon-brazil
#3
C Fantin, J Morais, R Botero-Arias, C Araújo, C Camillo, I P Farias
The aim of the present study was to investigate the reproductive behavior of the giant Amazon River turtle (Podocnemis expansa) in the Amazon. This was carried out by estimating the degree of polymorphism in five DNA microsatellites in a sample of 359 hatchlings from 12 nests in the Mamirauá Sustainable Development Reserve in the municipality of Tefé, state of Amazonas, Brazil. An analysis of allele frequency and variation in the five microsatellite loci allowed for determination of multiple paternity in all nests sampled...
February 16, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28217961/cellular-evidence-of-exosomes-in-the-reproductive-tract-of-chinese-soft-shelled-turtle-pelodiscus-sinensis
#4
Muhammad Yasir Waqas, Qian Zhang, Nisar Ahmed, Ping Yang, Guipei Xing, Masood Akhtar, Abdul Basit, Tengfei Liu, Chen Hong, Muhammad Arshad, Hafiz Muhammad Saif-Ur Rahman, Qiusheng Chen
The oviduct is a location of egg production, fertilization, and sperm storage. While its secretions have broadly attributes toward different physiological functions. We examined the ultrastructure of oviduct epithelium and glands in relation to the secretions, particularly with exosomes origin in Chinese soft-shelled turtle Pelodiscus sinensis using immunohistochemistry and transmission electron microscopy. The ciliated epithelial and gland cells were involved in the release of exosomes and secretions into lumen throughout the year...
February 20, 2017: Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology
https://www.readbyqxmd.com/read/28216338/glutathione-redox-balance-in-hibernating-chinese-soft-shelled-turtle-pelodiscus-sinensis-hatchlings
#5
Wenyi Zhang, Cuijuan Niu, Yukun Liu, Bojian Chen
Glutathione (GSH) system is a critical component of antioxidant defense, which is important for hibernating survive of turtle hatchlings. The present work measured changes at the mRNA level of genes involved in GSH synthesis, GSH reduction and GSH utilization, as well as enzyme activity, in Pelodiscus sinensis hatchlings during hibernation. Samples were taken in the field at pre-hibernation (17°C, Mud temperature (MT)), hibernation (5.8°C, MT) and arousal (20.1°C, MT). Cerebral total GSH content decreased during hibernation, recovered after arousal along with a stable ratio of GSH/GSSG...
February 12, 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28210809/growth-dynamics-of-juvenile-loggerhead-sea-turtles-undergoing-an-ontogenetic-habitat-shift
#6
Matthew D Ramirez, Larisa Avens, Jeffrey A Seminoff, Lisa R Goshe, Selina S Heppell
Ontogenetic niche theory predicts that individuals may undergo one or more changes in habitat or diet throughout their lifetime to maintain optimal growth rates, or to optimize trade-offs between mortality risk and growth. We combine skeletochronological and stable nitrogen isotope (δ(15)N) analyses of sea turtle humeri (n = 61) to characterize the growth dynamics of juvenile loggerhead sea turtles (Caretta caretta) during an oceanic-to-neritic ontogenetic shift. The primary objective of this study was to determine how ontogenetic niche theory extends to sea turtles, and to individuals with different patterns of resource use (discrete shifters, n = 23; facultative shifters n = 14; non-shifters, n = 24)...
February 16, 2017: Oecologia
https://www.readbyqxmd.com/read/28206991/a-jurassic-stem-pleurodire-sheds-light-on-the-functional-origin-of-neck-retraction-in-turtles
#7
Jérémy Anquetin, Haiyan Tong, Julien Claude
Modern turtles are composed of two monophyletic groups, notably diagnosed by divergent neck retraction mechanisms. Pleurodires (side-necked turtles) bend their neck sideways and protect their head under the anterior margin of the carapace. Cryptodires (hidden-necked turtles) withdraw their neck and head in the vertical plane between the shoulder girdles. These two mechanisms of neck retraction appeared independently in the two lineages and are usually assumed to have evolved for protective reasons. Here we describe the neck of Platychelys oberndorferi, a Late Jurassic early stem pleurodire, and find remarkable convergent morphological and functional similarities with modern cryptodires...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28202810/how-numbers-of-nesting-sea-turtles-can-be-overestimated-by-nearly-a-factor-of-two
#8
Nicole Esteban, Jeanne A Mortimer, Graeme C Hays
Estimating the absolute number of individuals in populations and their fecundity is central to understanding the ecosystem role of species and their population dynamics as well as allowing informed conservation management for endangered species. Estimates of abundance and fecundity are often difficult to obtain for rare or cryptic species. Yet, in addition, here we show for a charismatic group, sea turtles, that are neither cryptic nor rare and whose nesting is easy to observe, that the traditional approach of direct observations of nesting has likely led to a gross overestimation of the number of individuals in populations and underestimation of their fecundity...
February 22, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28202575/models-of-utricular-bouton-afferents-role-of-afferent-hair-cell-connectivity-in-determining-spike-train-regularity
#9
William R Holmes, Janice A Huwe, Barbara Williams, Michael H Rowe, Ellengene H Peterson
Vestibular bouton afferent terminals in turtle utricle can be categorized into four types depending on their location and terminal arbor structure: lateral extrastriolar (LES), striolar, juxtastriolar, and medial extrastriolar (MES). The terminal arbors of these afferents differ in surface area, total length, collecting area, number of boutons, number of bouton contacts per hair cell and axon diameter (Huwe et al. 2015). To understand how differences in terminal morphology and the resulting hair cell inputs might affect afferent response properties, we modeled representative afferents from each region, using reconstructed bouton afferents (Huwe et al...
February 15, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28201776/how-turtles-and-crocodiles-lost-the-parietal-third-eye-and-their-differing-color-vision-adaptations
#10
Joseph Caspermeyer
No abstract text is available yet for this article.
February 2, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28198382/re-shifting-the-ecological-baseline-for-the-overexploited-mediterranean-red-coral
#11
J Garrabou, E Sala, C Linares, J B Ledoux, I Montero-Serra, J M Dominici, S Kipson, N Teixidó, E Cebrian, D K Kersting, J G Harmelin
Overexploitation leads to the ecological extinction of many oceanic species. The depletion of historical abundances of large animals, such as whales and sea turtles, is well known. However, the magnitude of the historical overfishing of exploited invertebrates is unclear. The lack of rigorous baseline data limits the implementation of efficient management and conservation plans in the marine realm. The precious Mediterranean red coral Corallium rubrum has been intensively exploited since antiquity for its use in jewellery...
February 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28195654/what-is-your-diagnosis-blood-film-from-a-green-turtle-chelonia-mydas
#12
Nicole I Stacy, Melissa Ranly, Craig Pelton
No abstract text is available yet for this article.
February 13, 2017: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/28192472/identification-and-evaluation-of-semiochemicals-for-the-biological-control-of-the-beetle-omorgus-suberosus-f-coleoptera-trogidae-a-facultative-predator-of-eggs-of-the-sea-turtle-lepidochelys-olivacea-eschscholtz
#13
Vieyle Cortez, José R Verdú, Antonio J Ortiz, Gonzalo Halffter
The beetle Omorgus suberosus (F.) is a facultative predator of eggs of the olive ridley turtle Lepidochelys olivacea (Eschscholtz). Laboratory and field investigations were conducted in order to characterize volatile attractants of O. suberosus and to explore the potential for application of these volatiles in a selective mass trapping method. Headspace sorptive extraction (HSSE) coupled to thermo-desorption gas chromatography-mass spectrometry (TD-GC-MS) analysis of the volatile constituents from beetles or turtle nests revealed 24 potential compounds...
2017: PloS One
https://www.readbyqxmd.com/read/28192469/diatoms-on-the-carapace-of-common-snapping-turtles-luticola-spp-dominate-despite-spatial-variation-in-assemblages
#14
Shelly C Wu, Elizabeth A Bergey
Filamentous algae are often visible on the carapaces of freshwater turtles and these algae are dominated by a few species with varying geographic distributions. Compared to filamentous algae, little is known about the much more speciose microalgae on turtles. Our objectives were to compare the diatom flora on a single turtle species (the common snapping turtle, Chelydra serpentina) across part of its range to examine spatial patterns and determine whether specific diatom taxa were consistently associated with turtles (as occurs in the filamentous alga Basicladia spp...
2017: PloS One
https://www.readbyqxmd.com/read/28191733/a-novel-dynamic-expression-of-vasa-in-male-germ-cells-during-spermatogenesis-in-the-chinese-soft-shell-turtle-pelidiscus-sinensis
#15
Wei Li, Piaoyi Zhang, Xuling Wu, Xinping Zhu, Hongyan Xu
vasa gene encodes a highly conserved DEAD-box RNA helicase, required for germ cell development across animal kingdom. Vasa mutations cause male infertility in mammals. It has been widely used as a biomarker for studying animal fertility or manipulating germ cells in organisms. However, in reptilians, the functions of vasa gene involved in germ cell differentiation are largely unclear; this hampers the development of biological techniques and the improvement of the productivity in these species. Here a vasa cDNA was isolated in Chinese soft-shell turtle and it predicts a protein of 691 amino acid residues, which is 72%, 69%, 58%, 59%, and 54-56% identical to its homolog from mouse, platypus, frog, chicken, and fish, respectively, and named as PsVasa...
February 13, 2017: Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution
https://www.readbyqxmd.com/read/28187181/anti-predator-meshing-may-provide-greater-protection-for-sea-turtle-nests-than-predator-removal
#16
Julie M O'Connor, Colin J Limpus, Kate M Hofmeister, Benjamin L Allen, Scott E Burnett
The problem of how to protect sea turtle nests from terrestrial predators is of worldwide concern. On Queensland's southern Sunshine Coast, depredation of turtle nests by the introduced European red fox (Vulpes vulpes) has been recorded as the primary terrestrial cause of egg and hatchling mortality. We investigated the impact of foxes on the nests of the loggerhead turtle (Caretta caretta) and occasional green turtle (Chelonia mydas) over ten nesting seasons. Meshing of nests with fox exclusion devices (FEDs) was undertaken in all years accompanied by lethal fox control in the first five-year period, but not in the second five-year period...
2017: PloS One
https://www.readbyqxmd.com/read/28186382/vulnerability-of-european-freshwater-catchments-to-climate-change
#17
Danijela Markovic, Savrina F Carrizo, Oskar Kärcher, Ariane Walz, Jonathan N W David
Climate change is expected to exacerbate the current threats to freshwater ecosystems, yet multifaceted studies on the potential impacts of climate change on freshwater biodiversity at scales that inform management planning are lacking. The aim of this study is to fill this void through the development of a novel framework for assessing climate change vulnerability tailored to freshwater ecosystems. The three dimensions of climate change vulnerability are: 1) exposure to climate change; 2) sensitivity to altered environmental conditions; and 3) resilience potential...
February 10, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28186115/stable-cretaceous-sex-chromosomes-enable-molecular-sexing-in-softshell-turtles-testudines-trionychidae
#18
Michail Rovatsos, Peter Praschag, Uwe Fritz, Lukáš Kratochvšl
Turtles demonstrate variability in sex determination ranging from environmental sex determination (ESD) to highly differentiated sex chromosomes. However, the evolutionary dynamics of sex determining systems in this group is not well known. Differentiated ZZ/ZW sex chromosomes were identified in two species of the softshell turtles (Trionychidae) from the subfamily Trionychinae and Z-specific genes were identified in a single species. We tested Z-specificity of a subset of these genes by quantitative PCR comparing copy gene numbers in male and female genomes in 10 species covering the phylogenetic diversity of trionychids...
February 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28183885/ct-scan-reveals-reason-for-buoyancy-issues-in-stranded-turtle
#19
(no author information available yet)
No abstract text is available yet for this article.
February 11, 2017: Veterinary Record
https://www.readbyqxmd.com/read/28183028/estimates-of-the-non-market-value-of-sea-turtles-in-tobago-using-stated-preference-techniques
#20
Michelle Cazabon-Mannette, Peter W Schuhmann, Adrian Hailey, Julia Horrocks
Economic benefits are derived from sea turtle tourism all over the world. Sea turtles also add value to underwater recreation and convey non-use values. This study examines the non-market value of sea turtles in Tobago. We use a choice experiment to estimate the value of sea turtle encounters to recreational SCUBA divers and the contingent valuation method to estimate the value of sea turtles to international tourists. Results indicate that turtle encounters were the most important dive attribute among those examined...
February 6, 2017: Journal of Environmental Management
keyword
keyword
50281
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"