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https://www.readbyqxmd.com/read/28428250/functional-roles-of-globin-proteins-in-hypoxia-tolerant-ectothermic-vertebrates
#1
Angela Fago
Globins are heme-containing proteins ubiquitously expressed in vertebrates, where they serve a broad range of biological functions, directly or indirectly related to the tight control of oxygen levels and its toxic products in vivo. Perhaps the most investigated of all proteins, hemoglobin and myoglobin are primarily involved in oxygen transport and storage, but also in facilitating arterial vasodilation, suppressing mitochondrial respiration and preventing tissue oxidative damage via accessory redox enzymatic activities during hypoxia...
April 20, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28425423/pathology-and-molecular-analysis-of-hapalotrema-mistroides-digenea-spirorchiidae-infecting-a-mediterranean-loggerhead-turtle-caretta-caretta
#2
M Santoro, F Di Nocera, D Iaccarino, S P Lawton, A Cerrone, B Degli Uberti, M D'Amore, A Affuso, S Hochscheid, F Maffucci, G Galiero
Turtle blood flukes belonging to the family Spirorchiidae (Digenea) represent a major threat for sea turtle health and are considered the most important parasitic cause of turtle stranding and mortality worldwide. Despite the large diversity of spirorchiid species found globally, there are only 2 records for free-ranging Mediterranean sea turtles that date back to the late 1800s involving just Hapalotrema mistroides Monticelli, 1896. This study describes the first fatal confirmed case of spirorchiidiasis in a free-ranging Mediterranean loggerhead turtle Caretta caretta (Linnaeus) and, owing to the complexities of taxonomic identification of these parasites, provides the first molecular characterization and phylogenetic analysis of H...
April 20, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28425422/mass-mortality-of-eastern-box-turtles-with-upper-respiratory-disease-following-atypical-cold-weather
#3
Mickey Agha, Steven J Price, A Justin Nowakowski, Ben Augustine, Brian D Todd
Emerging infectious diseases cause population declines in many ectotherms, with outbreaks frequently punctuated by periods of mass mortality. It remains unclear, however, whether thermoregulation by ectotherms and variation in environmental temperature is associated with mortality risk and disease progression, especially in wild populations. Here, we examined environmental and body temperatures of free-ranging eastern box turtles Terrapene carolina during a mass die-off coincident with upper respiratory disease...
April 20, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28413719/intra-specific-variation-and-allometry-of-the-skull-of-late-cretaceous-side-necked-turtle-bauruemys-elegans-pleurodira-podocnemididae-and-how-to-deal-with-morphometric-data-in-fossil-vertebrates
#4
Thiago F Mariani, Pedro S R Romano
BACKGROUND: Previous quantitative studies on Bauruemys elegans (Suárez, 1969) shell variation, as well as the taphonomic interpretation of its type locality, have suggested that all specimens collected in this locality may have belonged to the same population. We rely on this hypothesis in a morphometric study of the skull. Also, we tentatively assessed the eating preference habits differentiation that might be explained as due to ontogenetic changes. METHODS: We carried out an ANOVA testing 29 linear measurements from 21 skulls of B...
2017: PeerJ
https://www.readbyqxmd.com/read/28409226/daily-thermal-fluctuations-to-a-range-of-subzero-temperatures-enhance-cold-hardiness-of-winter-acclimated-turtles
#5
James M Wiebler, Manisha Kumar, Timothy J Muir
Although seasonal increases in cold hardiness are well documented for temperate and polar ectotherms, relatively little is known about supplemental increases in cold hardiness during winter. Because many animals are exposed to considerable thermal variation in winter, they may benefit from a quick enhancement of cold tolerance prior to extreme low temperature. Hatchling painted turtles (Chrysemys picta) overwintering in their natal nests experience substantial thermal variation in winter, and recently, it was found that brief subzero chilling of winter-acclimated hatchlings decreases subsequent chilling-induced mortality, increases blood concentrations of glucose and lactate, and protects the brain from cryoinjury...
April 13, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28408048/distribution-pattern-of-anthropogenic-marine-debris-along-the-gastrointestinal-tract-of-green-turtles-chelonia-mydas-as-implications-for-rehabilitation
#6
André S Colferai, Rodolfo Pinho Silva-Filho, Aryse Moreira Martins, Leandro Bugoni
Pollution from anthropogenic marine debris (AMD) is currently the most widely distributed and lasting anthropic impact in the marine environment, affecting hundreds of species, including all sea turtles. In this study, the patterns of AMD distribution along the gastrointestinal tract (GT) and their relationship with obstructions and faecalomas in 62 green turtles (Chelonia mydas) that died during rehabilitation in southern Brazil were determined. The GT was split in seven sections, corresponding to the natural organs and intestinal areas morphologically and physiologically distinct...
April 10, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28406418/collective-poisoning-from-sea-turtle-consumption-in-mahajanga-madagascar-may-2014
#7
N G Rasamimanana, Z Z Andrianirina, F M F Razafilalaina, L M P Rakotozanany, N C Andriamalala, D Andrianarimanana, D O Tiandaza, N E Raveloson
Poisoning from eating sea turtles, medically known as chelonitoxism, is seen especially in coastal areas. It remains a public health problem in Madagascar, despite a ban on hunting these animals. The objective of this study was to describe its epidemiological and clinical aspects and outcome to improve knowledge and prevention of this type of poisoning. Chelonitoxism occurred in May 2014, affecting the population in Antsanitia, a fishing village in northwest Mahajanga, Madagascar. All patients came first to the CSB I basic health center in Antsanitia and were subsequently hospitalized at the Mahajanga CHU Pzaga, 51 in the adult emergency department and 25 in the pediatrics department...
February 1, 2017: Médecine et Santé Tropicales
https://www.readbyqxmd.com/read/28396621/exploring-the-relationship-between-brain-plasticity-migratory-lifestyle-and-social-structure-in-birds
#8
Shay Barkan, Yoram Yom-Tov, Anat Barnea
Studies in Passerines have found that migrating species recruit more new neurons into brain regions that process spatial information, compared with resident species. This was explained by the greater exposure of migrants to spatial information, indicating that this phenomenon enables enhanced navigational abilities. The aim of the current study was to test this hypothesis in another order-the Columbiformes - using two closely-related dove species-the migrant turtle-dove (Streptopelia turtur) and the resident laughing dove (S...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28392984/non-native-molluscan-colonizers-on-deliberately-placed-shipwrecks-in-the-florida-keys-with-description-of-a-new-species-of-potentially-invasive-worm-snail-gastropoda-vermetidae
#9
Rüdiger Bieler, Camila Granados-Cifuentes, Timothy A Rawlings, Petra Sierwald, Timothy M Collins
Artificial reefs created by deliberately sinking ships off the coast of the Florida Keys island chain are providing new habitat for marine invertebrates. This newly developing fouling community includes the previously reported invasive orange tube coral Tubastraea coccinea and the non-native giant foam oyster Hyotissa hyotis. New SCUBA-based surveys involving five shipwrecks spanning the upper, middle, and lower Florida Keys, show T. coccinea now also established in the lower Keys and H. hyotis likewise extending to new sites...
2017: PeerJ
https://www.readbyqxmd.com/read/28392536/potential-enterotoxicity-and-antimicrobial-resistance-pattern-of-aeromonas-species-isolated-from-pet-turtles-and-their-environment
#10
S H M P Wimalasena, Gee-Wook Shin, Sabrina Hossain, Gang-Joon Heo
To investigate the potential enterotoxicity and antimicrobial resistance of aeromonads from pet turtles as a risk for human infection, one hundred and two Aeromonas spp. were isolated from the feces, skin and rearing environments of pet turtles and identified by biochemical and gyrB sequence analyses. Aeromonas enteropelogenes was the predominant species among the isolates (52.9%) followed by A. hydrophila (32.4%), A. dharkensis (5.9%), A. veronii (4.9%) and A. caviae (3.9%). Their potential enterotoxicities were evaluated by PCR assays for detecting genes encoding cytotoxic enterotoxin (act) and two cytotonic enterotoxins (alt and ast)...
April 10, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28390664/vascular-distensibilities-have-minor-effects-on-intracardiac-shunt-patterns-in-reptiles
#11
Renato Filogonio, Cléo Alcantara Costa Leite, Tobias Wang
The different vascular distensibilities of systemic and pulmonary circuits were recently proposed as an important mechanism defining the direction of cardiac shunt and the distribution of cardiac output in vertebrates with undivided cardiac ventricles. In short, the more distensible pulmonary vascular bed was proposed to accommodate a larger portion of the blood ejected from the heart when cardiac output increases. To evaluate this hypothesis, we performed a meta-analysis based on fourteen previously published studies in two species of reptiles (the freshwater turtle, Trachemys scripta, and the South American rattlesnake, Crotalus durissus) to describe how cardiac shunt patterns change when cardiac output increases...
February 20, 2017: Zoology: Analysis of Complex Systems, ZACS
https://www.readbyqxmd.com/read/28386540/sox9-expression-in-amniotes-species-specific-differences-in-the-formation-of-digits
#12
Juan A Montero, Carlos I Lorda-Diez, Javier Francisco-Morcillo, Jesus Chimal-Monroy, Juan A Garcia-Porrero, Juan M Hurle
In tetrapods the digit pattern has evolved to adapt to distinct locomotive strategies. The number of digits varies between species or even between hindlimb and forelimb within the same species. These facts illustrate the plasticity of embryonic limb autopods. Sox9 is a precocious marker of skeletal differentiation of limb mesenchymal cells. Its pattern of expression in the developing limb has been widely studied and reflects the activity of signaling cascades responsible for skeletogenesis. In this assay we stress previously overlooked differences in the pattern of expression of Sox9 in limbs of avian, mouse and turtle embryos which may reflect signaling differences associated with distinct limb skeletal morphologies observed in these species...
2017: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/28384063/stress-response-of-juvenile-green-sea-turtles-chelonia-mydas-with-different-fibropapillomatosis-scores
#13
Marcelo Renan de Deus Santos, Paulo Dias Ferreira Júnior, Yhuri Cardoso Nóbrega, Julia Merçon, Tatiana Miura Pereira, Levy Carvalho Gomes
Green sea turtles ( Chelonia mydas ) with cutaneous fibropapillomatosis (FP) occur in some populations worldwide, and the survivability of these individuals may be compromised depending on the disease severity score. Furthermore, populations may be negatively affected in areas with a high prevalence of the disease. The stress responses (corticosterone, glucose, lactate, and hematocrit) to capture and handling were assessed in animals with different FP severity scores. From 18 January 2013 to 31 July 2014, 33 juvenile (sex was not determined) C...
April 6, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28379974/non-invasive-phenotyping-and-drug-testing-in-single-cardiomyocytes-or-beta-cells-by-calcium-imaging-and-optogenetics
#14
Yu-Fen Chang, Connor N Broyles, Frances A Brook, Mark J Davies, Cameron W Turtle, Takeharu Nagai, Matthew J Daniels
Identification of drug induced electrical instability of the heart curtails development, and introduction, of potentially proarrhythmic drugs. This problem usually requires complimentary contact based approaches such as patch-clamp electrophysiology combined with field stimulation electrodes to observe and control the cell. This produces data with high signal to noise but requires direct physical contact generally preventing high-throughput, or prolonged, phenotyping of single cells or tissues. Combining genetically encoded optogenetic control and spectrally compatible calcium indicator tools into a single adenoviral vector allows the analogous capability for cell control with simultaneous cellular phenotyping without the need for contact...
2017: PloS One
https://www.readbyqxmd.com/read/28378354/ecological-regime-shift-drives-declining-growth-rates-of-sea-turtles-throughout-the-west-atlantic
#15
Karen A Bjorndal, Alan B Bolten, Milani Chaloupka, Vincent S Saba, Cláudio Bellini, Maria A G Marcovaldi, Armando J B Santos, Luis Felipe Wurdig Bortolon, Anne B Meylan, Peter A Meylan, Jennifer Gray, Robert Hardy, Beth Brost, Michael Bresette, Jonathan C Gorham, Stephen Connett, Barbara Van Sciver Crouchley, Mike Dawson, Deborah Hayes, Carlos E Diez, Robert P van Dam, Sue Willis, Mabel Nava, Kristen M Hart, Michael S Cherkiss, Andrew G Crowder, Clayton Pollock, Zandy Hillis-Starr, Fernando A Muñoz Tenería, Roberto Herrera-Pavón, Vanessa Labrada-Martagón, Armando Lorences, Ana Negrete-Philippe, Margaret M Lamont, Allen M Foley, Rhonda Bailey, Raymond R Carthy, Russell Scarpino, Erin McMichael, Jane A Provancha, Annabelle Brooks, Adriana Jardim, Milagros López-Mendilaharsu, Daniel González-Paredes, Andrés Estrades, Alejandro Fallabrino, Gustavo Martínez-Souza, Gabriela M Vélez-Rubio, Ralf H Boulon, Jaime A Collazo, Robert Wershoven, Vicente Guzmán Hernández, Thomas B Stringell, Amdeep Sanghera, Peter B Richardson, Annette C Broderick, Quinton Phillips, Marta Calosso, John A B Claydon, Tasha L Metz, Amanda L Gordon, Andre M Landry, Donna J Shaver, Janice Blumenthal, Lucy Collyer, Brendan J Godley, Andrew McGowan, Matthew J Witt, Cathi L Campbell, Cynthia J Lagueux, Thomas L Bethel, Lory Kenyon
Somatic growth is an integrated, individual-based response to environmental conditions, especially in ectotherms. Growth dynamics of large, mobile animals are particularly useful as bio-indicators of environmental change at regional scales. We assembled growth rate data from throughout the West Atlantic for green turtles, Chelonia mydas, which are long-lived, highly migratory, primarily herbivorous mega-consumers that may migrate over hundreds to thousands of kilometers. Our dataset, the largest ever compiled for sea turtles, has 9690 growth increments from 30 sites from Bermuda to Uruguay from 1973 to 2015...
April 4, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28376425/effects-of-attitudes-and-demography-on-public-support-for-endangered-species-conservation
#16
Vasilios Liordos, Vasileios J Kontsiotis, Magdalini Anastasiadou, Efstathios Karavasias
It is critical for managers to understand how attitudes and demography affect public's preferences for species protection for designing successful conservation projects. 1080 adults in Greece were asked to rate pictures of 12 endangered species on aesthetic and negativistic attitudes, and intention to support their conservation. Factor analysis identified a group of animals for which respondents indicated high levels of support for their conservation (red deer, loggerhead sea turtle, brown bear, common pheasant, European ground squirrel, glossy ibis) and a group of animals for which respondents indicated low levels of support (black vulture, great white shark, fire-bellied toad, western barbastelle, Cretan tube web spider, Milos viper)...
April 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28367374/status-of-marine-turtle-rehabilitation-in-queensland
#17
Jaylene Flint, Mark Flint, Colin James Limpus, Paul Mills
Rehabilitation of marine turtles in Queensland has multifaceted objectives. It treats individual animals, serves to educate the public, and contributes to conservation. We examined the outcome from rehabilitation, time in rehabilitation, and subsequent recapture and restranding rates of stranded marine turtles between 1996 and 2013 to determine if the benefits associated with this practice are cost-effective as a conservation tool. Of 13,854 marine turtles reported as stranded during this 18-year period, 5,022 of these turtles were stranded alive with the remainder verified as dead or of unknown condition...
2017: PeerJ
https://www.readbyqxmd.com/read/28364647/trace-elements-in-loggerhead-turtles-caretta-caretta-stranded-in-mainland-portugal-bioaccumulation-and-tissue-distribution
#18
Lídia Nicolau, Sílvia S Monteiro, Andreia T Pereira, Ana Marçalo, Marisa Ferreira, Jordi Torres, José Vingada, Catarina Eira
Pollution is among the most significant threats that endanger sea turtles worldwide. Waters off the Portuguese mainland are acknowledged as important feeding grounds for juvenile loggerheads. However, there is no data on trace element concentrations in marine turtles occurring in these waters. We present the first assessment of trace element concentrations in loggerhead turtles (Caretta caretta) occurring off the coast of mainland Portugal. Also, we compare our results with those from other areas and discuss parameters that may affect element concentrations...
March 27, 2017: Chemosphere
https://www.readbyqxmd.com/read/28363127/tissue-uptake-distribution-and-excretion-of-brevetoxin-3-after-oral-and-intratracheal-exposure-in-the-freshwater-turtle-trachemys-scripta-and-the-diamondback-terrapin-malaclemys-terrapin
#19
Courtney C Cocilova, Leanne J Flewelling, Gregory D Bossart, April A Granholm, Sarah L Milton
Harmful algal blooms (HABs) occur nearly annually off the west coast of Florida and can impact both humans and wildlife, resulting in morbidity and increased mortality of marine animals including sea turtles. The key organism in Florida red tides is the dinoflagellate Karenia brevis that produces a suite of potent neurotoxins referred to as the brevetoxins (PbTx). Despite recent mortality events and rehabilitation efforts, still little is known about how the toxin directly impacts sea turtles, as they are not amenable to experimentation and what is known about toxin levels and distribution comes primarily from post-mortem data...
March 7, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28363077/examining-the-preference-for-shade-structures-in-farmed-green-sea-turtles-chelonia-mydas-and-shade-s-effect-on-growth-and-temperatures
#20
Martha Keller, Walter Mustin
The Cayman Turtle Farm raises thousands of green sea turtles ( Chelonia mydas ) annually under aquaculture conditions. Historically, the turtles have been raised in tanks without routine access to a shade structure. The purpose of this study was to determine the effects of adding a shade structure on curved carapace length (CCL) and weight gain of green sea turtles. In addition, water and cloacal temperatures were compared across treatment groups and shade cover preferences observed. Ninety turtles were split equally into three treatment groups for this 8-wk study...
March 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
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