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https://www.readbyqxmd.com/read/28813431/skeleton-of-an-unusual-cat-sized-marsupial-relative-metatheria-marsupialiformes-from-the-middle-eocene-lutetian-44-43-million-years-ago-of-turkey
#1
A Murat Maga, Robin M D Beck
We describe a near-complete, three-dimensionally preserved skeleton of a metatherian (relative of modern marsupials) from the middle Eocene (Lutetian: 44-43 million years ago) Lülük member of the Uzunçarşıdere Formation, central Turkey. With an estimated body mass of 3-4 kg, about the size of a domestic cat (Felis catus) or spotted quoll (Dasyurus maculatus), it is an order of magnitude larger than the largest fossil metatherians previously known from the Cenozoic of the northern hemisphere. This new taxon is characterised by large, broad third premolars that probably represent adaptations for hard object feeding (durophagy), and its craniodental morphology suggests the capacity to generate high bite forces...
2017: PloS One
https://www.readbyqxmd.com/read/28812553/rapid-recovery-of-patagonian-plant-insect-associations-after-the-end-cretaceous-extinction
#2
Michael P Donovan, Ari Iglesias, Peter Wilf, Conrad C Labandeira, N Rubén Cúneo
The Southern Hemisphere may have provided biodiversity refugia after the Cretaceous/Palaeogene (K/Pg) mass extinction. However, few extinction and recovery studies have been conducted in the terrestrial realm using well-dated macrofossil sites that span the latest Cretaceous (late Maastrichtian) and early Palaeocene (Danian) outside western interior North America (WINA). Here, we analyse insect-feeding damage on 3,646 fossil leaves from the latest Maastrichtian and three time slices of the Danian in Chubut, Patagonia, Argentina (palaeolatitude approximately 50° S)...
November 7, 2016: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812189/nutrient-intake-of-swiss-toddlers
#3
Thomas A Brunner, Luca Casetti, Petra Haueter, Pascal Müller, Andreas Nydegger, Johannes Spalinger
PURPOSE: During the first years of life, food preferences are shaped that might last throughout a person's entire life affecting his/her health in the long term. However, knowledge on early feeding habits is still limited for toddlers. Therefore, the goal of the present study was to: (1) assess toddlers' nutrient intake; (2) compare the findings to past studies as well as to national feeding recommendations and (3) identify major food sources for energy and macronutrients. METHODS: A food survey using a 4-day diary was conducted...
August 10, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28811882/seasonal-changes-in-leaf-chemistry-and-leaf-selection-of-the-japanese-giant-flying-squirrel-upon-two-tree-species
#4
Mutsumi Ito, Noriko Tamura, Fumio Hayashi
Tree leaves are important food sources for arboreal herbivores, such as primates, rodents, and marsupials. These animals do not eat leaves randomly in habitats with many tree species but rather choose based on the chemical components of leaves, such as sugars, fibers, proteins, and toxins. However, the effects of the microscale distribution of these chemicals within each leaf have not been examined for these animals. The giant flying squirrels Petaurista leucogenys are entirely arboreal, nocturnal herbivores, usually feeding on leaves and dropping leaf debris on the ground after partially consuming them...
August 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28811168/an-ontogenetic-perspective-on-symphyseal-fusion-occlusion-and-mandibular-loading-in-alpacas-vicugna-pacos
#5
Kristin K Stover, JoAnna Sidote, Susan H Williams
A primary hypothesis for the evolution of mandibular symphyseal fusion in some mammals is that it functions to resist loads incurred during routine mastication. Anecdotal support for this hypothesis is based on the fact that when the symphysis fuses, it typically does so early during postnatal ontogeny prior to or around the time of weaning. However, little is known about the process of fusion, particularly relative to feeding behaviors and the dynamics of mastication, including occlusion and masticatory loading...
June 17, 2017: Zoology: Analysis of Complex Systems, ZACS
https://www.readbyqxmd.com/read/28808326/the-importance-of-the-nutritive-value-of-old-bones-in-the-diet-of-bearded-vultures-gypaetus-barbatus
#6
Antoni Margalida, Daniel Villalba
Vultures are central-place foragers and need to optimize their foraging behaviour to offset travel costs by increasing their energy gain. This process is more obvious in certain vulture species that do not feed their young by regurgitation and so must carry food items back to the nest. The Bearded Vulture Gypaetus barbatus is the only species with a bone-diet based. We analysed the chemical composition of bones and the age-related changes in their nutritive value to assess the differences in energy content between bones of differing age, body part and species...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28808034/feedback-amplification-loop-drives-malignant-growth-in-epithelial-tissues
#7
Mariana Muzzopappa, Lada Murcia, Marco Milán
Interactions between cells bearing oncogenic mutations and the surrounding microenvironment, and cooperation between clonally distinct cell populations, can contribute to the growth and malignancy of epithelial tumors. The genetic techniques available in Drosophila have contributed to identify important roles of the TNF-α ligand Eiger and mitogenic molecules in mediating these interactions during the early steps of tumor formation. Here we unravel the existence of a tumor-intrinsic-and microenvironment-independent-self-reinforcement mechanism that drives tumor initiation and growth in an Eiger-independent manner...
August 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28807299/seasonality-and-circadian-variation-of-microfilaremia-in-dogs-experimentally-infected-with-dirofilaria-immitis
#8
Léonore Lovis, Mélanie Grandjean, Laurence Overney, Wolfgang Seewald, Heinz Sager
Periodicity, the cyclical rise and fall in microfilaria (mff) numbers in the peripheral blood over time, is observed in many filarial infections. It is correlated with the necessity for these larval stages to be ingested by the blood feeding vector before they can be transmitted to a new vertebrate host. Microfilariae of the dog heartworm Dirofilaria immitis have been described to show periodicity, but the circadian pattern does not seem to be consistent. Most publications describe the lowest mff-concentrations in the peripheral blood in the early morning, while the highest counts occurred either in the afternoon, in the late evening or shortly after midnight...
August 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28806748/temperature-effects-on-gene-expression-and-morphological-development-of-european-eel-anguilla-anguilla-larvae
#9
Sebastian N Politis, David Mazurais, Arianna Servili, Jose-Luis Zambonino-Infante, Joanna J Miest, Sune R Sørensen, Jonna Tomkiewicz, Ian A E Butts
Temperature is important for optimization of rearing conditions in aquaculture, especially during the critical early life history stages of fish. Here, we experimentally investigated the impact of temperature (16, 18, 20, 22 and 24°C) on thermally induced phenotypic variability, from larval hatch to first-feeding, and the linked expression of targeted genes [heat shock proteins (hsp), growth hormone (gh) and insulin-like growth factors (igf)] associated to larval performance of European eel, Anguilla anguilla...
2017: PloS One
https://www.readbyqxmd.com/read/28805897/effects-of-grass-silage-quality-and-level-of-feed-intake-on-enteric-methane-production-in-lactating-dairy-cows
#10
D Warner, A Bannink, B Hatew, H van Laar, J Dijkstra
The objective of this study was to determine the effect of level of feed intake and quality of ryegrass silage as well as their interaction on enteric methane (CH) emission from dairy cows. In a randomized block design, 56 lactating dairy cows received a diet of grass silage, corn silage, and a compound feed meal (70:10:20 on DM basis). Treatments consisted of 4 grass silage qualities prepared from grass harvested from leafy through late heading stage, and offered to dairy cows at 96 ± 2.4 (mean ± SEM) days in milk (namely, high intake) and 217 ± 2...
August 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28805477/estimated-exposures-to-perfluorinated-compounds-in-infancy-predict-attenuated-vaccine-antibody-concentrations-at-age-5-years
#11
Philippe Grandjean, Carsten Heilmann, Pal Weihe, Flemming Nielsen, Ulla B Mogensen, Amalie Timmermann, Esben Budtz-Jørgensen
Perfluorinated alkylate substances (PFASs) are highly persistent and may cause immunotoxic effects. PFAS-associated attenuated antibody responses to childhood vaccines may be affected by PFAS exposures during infancy, where breastfeeding adds to PFAS exposures. Of 490 members of a Faroese birth cohort, 275 and 349 participated in clinical examinations and provided blood samples at ages 18 months and 5 years. PFAS concentrations were measured at birth and at the clinical examinations. Using information on duration of breastfeeding, serum-PFAS concentration profiles during infancy were estimated...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28803584/table-talk-development-of-an-observational-tool-to-assess-verbal-feeding-communications-in-early-care-and-education-settings
#12
Taren Swindle, Julie M Rutledge, Belynda Dix, Leanne Whiteside-Mansell
OBJECTIVE: Children's dietary intake impacts weight status and a range of short- and long-term health outcomes. Accurate measurement of factors that influence children's diet is critical to the development and evaluation of interventions designed to improve children's diets. The purpose of the current paper is to present the development of the Table Talk observational tool to measure early care and education teachers' (ECET) verbal feeding communications. DESIGN: An observational tool to assess ECET verbal communication at mealtimes was deigned based on the extant literature...
August 14, 2017: Public Health Nutrition
https://www.readbyqxmd.com/read/28802297/breastfeeding-and-early-childhood-caries-a-meta-analysis-of-observational-studies
#13
Lingling Cui, Xing Li, Yalan Tian, Juntao Bao, Ling Wang, Dongmei Xu, Bing Zhao, Wenjie Li
BACKGROUND AND OBJECTIVES: The associations of breastfeeding and early childhood caries (ECC) risk have been evaluated in several epidemiological studies with conflicting results. We performed an update meta-analysis to estimate the association of feeding patterns, breastfeeding durations and ECC risk. METHODS AND STUDY DESIGN: Studies were identified through searching Pubmed, Web of Science, and Embase from January 1990 to December 2015. RESULTS: Thirty-five studies involving 73,401 participants aged 0-71 months were included...
2017: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28798904/tick-borne-viruses-and-biological-processes-at-the-tick-host-virus-interface
#14
REVIEW
Mária Kazimírová, Saravanan Thangamani, Pavlína Bartíková, Meghan Hermance, Viera Holíková, Iveta Štibrániová, Patricia A Nuttall
Ticks are efficient vectors of arboviruses, although less than 10% of tick species are known to be virus vectors. Most tick-borne viruses (TBV) are RNA viruses some of which cause serious diseases in humans and animals world-wide. Several TBV impacting human or domesticated animal health have been found to emerge or re-emerge recently. In order to survive in nature, TBV must infect and replicate in both vertebrate and tick cells, representing very different physiological environments. Information on molecular mechanisms that allow TBV to switch between infecting and replicating in tick and vertebrate cells is scarce...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28798080/long-term-programming-effect-of-early-hypoxia-and-high-carbohydrate-diet-at-first-feeding-on-glucose-metabolism-in-rainbow-trout-juveniles
#15
Jingwei Liu, Karine Dias, Elisabeth Plagnes-Juan, Vincent Véron, Stéphane Panserat, Lucie Marandel
Environmental conditions experienced during early life play an important role in the long-term metabolic status of individuals. The present study investigated whether early hypoxia exposure (24 h, 2.5 mg·l(-1), 20% dissolved O2) during embryo stage alone (hypoxic history) or combined with a 5-day high carbohydrate diet (60%) stimulus at first-feeding (high carbohydrate diet history) can affect the glucose metabolism later in life, i.e. in fish juveniles. After 19 weeks of growth, we observed a decrease in final body weight in fish with a high carbohydrate diet history...
August 10, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28797516/the-carnivorous-feeding-behavior-of-early-homo-at-hwk-ee-bed-ii-olduvai-gorge-tanzania
#16
Michael C Pante, Jackson K Njau, Blaire Hensley-Marschand, Trevor L Keevil, Carmen Martín-Ramos, Renata Franco Peters, Ignacio de la Torre
The regular consumption of large mammal carcasses, as evidenced by butchery marks on fossils recovered from Early Stone Age archaeological sites, roughly coincides with the appearance of Homo habilis. However, the significance of this niche expansion cannot be appreciated without an understanding of hominin feeding behavior and their ecological interactions with mammalian carnivores. The Olduvai Geochronology and Archaeology Project (OGAP) has recovered a large and well-preserved fossil assemblage from the HWK EE site, which was deposited just prior to the first appearance of Acheulean technology at Olduvai Gorge and likely represents one of the last H...
August 7, 2017: Journal of Human Evolution
https://www.readbyqxmd.com/read/28797454/impact-of-early-prophylactic-feeding-on-long-term-tube-dependency-outcomes-in-patients-with-head-and-neck-cancer
#17
Teresa Brown, Merrilyn Banks, Brett G M Hughes, Charles Lin, Lizbeth M Kenny, Judith D Bauer
OBJECTIVES: Prophylactic gastrostomy tube (PGT) is frequently used in patients with head and neck cancer (HNSCC). There are concerns this leads to tube dependency but this phenomena is not well defined. This study aimed to determine whether early feeding via PGT impacted on longer term tube feeding outcomes. MATERIALS AND METHODS: Patients with HNSCC with PGT were observed monthly post-treatment regarding tube use and time to removal up to twelve months. Patients were from a randomised controlled trial comparing an early feeding intervention via the PGT (n=57) versus usual care which commenced feeding when clinically indicated (n=67)...
September 2017: Oral Oncology
https://www.readbyqxmd.com/read/28797450/tube-feeding-during-treatment-for-head-and-neck-cancer-adherence-and-patient-reported-barriers
#18
Teresa Brown, Merrilyn Banks, Brett G M Hughes, Charles Lin, Lizbeth Kenny, Judith Bauer
OBJECTIVES: The main aim was to investigate the incidence of patient adherence to nutritional tube feeding recommendations in patients with head and neck cancer and to determine patient barriers to meeting tube feeding prescription. MATERIALS AND METHODS: This was an observational study from a randomised controlled trial in patients with head and neck cancer deemed at high nutritional risk with prophylactic gastrostomy (n=125). Patients were randomised to receive early tube feeding prior to treatment (intervention group) or standard care...
September 2017: Oral Oncology
https://www.readbyqxmd.com/read/28797301/sialotranscriptomics-of-rhipicephalus-zambeziensis-reveals-intricate-expression-profiles-of-secretory-proteins-and-suggests-tight-temporal-transcriptional-regulation-during-blood-feeding
#19
Minique Hilda de Castro, Daniel de Klerk, Ronel Pienaar, D Jasper G Rees, Ben J Mans
BACKGROUND: Ticks secrete a diverse mixture of secretory proteins into the host to evade its immune response and facilitate blood-feeding, making secretory proteins attractive targets for the production of recombinant anti-tick vaccines. The largely neglected tick species, Rhipicephalus zambeziensis, is an efficient vector of Theileria parva in southern Africa but its available sequence information is limited. Next generation sequencing has advanced sequence availability for ticks in recent years and has assisted the characterisation of secretory proteins...
August 10, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28797058/quantitative-approach-for-the-risk-assessment-of-african-swine-fever-and-classical-swine-fever-introduction-into-the-united-states-through-legal-imports-of-pigs-and-swine-products
#20
Diana María Herrera-Ibatá, Beatriz Martínez-López, Darla Quijada, Kenneth Burton, Lina Mur
The US livestock safety strongly depends on its capacity to prevent the introduction of Transboundary Animal Diseases (TADs). Therefore, accurate and updated information on the location and origin of those potential TADs risks is essential, so preventive measures as market restrictions can be put on place. The objective of the present study was to evaluate the current risk of African swine fever (ASF) and Classical swine fever (CSF) introduction into the US through the legal importations of live pigs and swine products using a quantitative approach that could be later applied to other risks...
2017: PloS One
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