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https://www.readbyqxmd.com/read/29351362/analysis-of-the-effect-of-cyclophosphamide-and-methotrexate-on-chrysomya-megacephala-diptera-calliphoridae
#1
Ana Letícia Trivia, Carlos José de Carvalho Pinto
Forensic entomotoxicology investigates the effects of chemical substances in the development of scavenger insects and the reflection on estimating the minimum postmortem interval (PMI). To evaluate the impact of the chemotherapeutic drugs cyclophosphamide (CF) and methotrexate (MTX) on the postembryonic development of Chrysomya megacephala, controlled experiments were performed by rearing the larvae on spiked minced beef with different concentrations of these drugs. The results indicated that CF significantly decreased their developmental rate up to 28 h but had no significant effect on larval and adult sizes, survival rate, and sex ratio, whereas MTX decreased larval and adult sizes, survival rate, and there was a deviation in the expected sex ratio toward females in MTX-exposed larvae but had no significant impact on developmental rate...
January 19, 2018: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/29351205/influence-of-grapevine-cultivar-on-the-second-generations-of-lobesia-botrana-and-eupoecilia-ambiguella
#2
Francesco Pavan, Giorgio Stefanelli, Alberto Villani, Elena Cargnus
Grapevine cultivar can affect susceptibility to Lobesia botrana and Eupoecilia ambiguella with important implications on control strategies. A four-year study was carried out in north-eastern Italy on 10 cultivars (Cabernet Sauvignon, Carménère, Chardonnay, Merlot, Refosco dal Peduncolo Rosso, Rhine Riesling, Sauvignon Blanc, Terrano, Tocai Friulano and Verduzzo Friulano) grown in the same vineyard to assess whether the cultivar affects second-generation population levels of the two vine moths and L. botrana larval age composition...
January 19, 2018: Insects
https://www.readbyqxmd.com/read/29349779/skeletogenesis-in-the-persian-sturgeon-acipenser-persicus-and-its-correlation-with-gene-expression-of-vitamin-k-dependent-proteins-during-larval-development
#3
H Eshaghzadeh, A Akbarzadeh, M Yarmohammadi, E Gisbert
The present study describes morphological development of the skeleton in the Persian sturgeon Acipenser persicus and discusses the hypothesis that expression of genes encoding vitamin K-dependent proteins (VKDP) might be correlated with the mineralization of skeletal tissues during early development in sturgeons. Results showed that development of cartilage started just after hatching (mean ± S.D., 10·9 ± 0·7 mm in total length, LT ) in the head and notochord, whereas the first signs of mineralization occurred in the dentary and in the dermopalatine and palatopterygoid elements of the upper jaw, coinciding with the onset of exogenous feeding (20·1 ± 1·5 mm LT )...
January 18, 2018: Journal of Fish Biology
https://www.readbyqxmd.com/read/29348592/stingless-bee-larvae-require-fungal-steroid-to-pupate
#4
Camila R Paludo, Cristiano Menezes, Eduardo A Silva-Junior, Ayrton Vollet-Neto, Andres Andrade-Dominguez, Gleb Pishchany, Lily Khadempour, Fabio S do Nascimento, Cameron R Currie, Roberto Kolter, Jon Clardy, Mônica T Pupo
The larval stage of the stingless bee Scaptotrigona depilis must consume a specific brood cell fungus in order to continue development. Here we show that this fungus is a member of the genus Zygosaccharomyces and provides essential steroid precursors to the developing bee. Insect pupation requires ecdysteroid hormones, and as insects cannot synthesize sterols de novo, they must obtain steroids in their diet. Larval in vitro culturing assays demonstrated that consuming ergosterol recapitulates the developmental effects on S...
January 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29346533/density-of-emerald-ash-borer-coleoptera-buprestidae-adults-and-larvae-at-three-stages-of-the-invasion-wave
#5
Stephen J Burr, Deborah G McCullough, Therese M Poland
Emerald ash borer (EAB) (Agrilus planipennis Fairmaire) (Coleoptera: Buprestidae), an invasive phloem-feeding buprestid, has killed hundreds of millions of ash (Fraxinus spp.) trees in the United States and two Canadian provinces. We evaluated EAB persistence in post-invasion sites and compared EAB adult captures and larval densities in 24 forested sites across an east-west gradient in southern Michigan representing the Core (post-invasion), Crest (high EAB populations), and Cusp (recently infested areas) of the EAB invasion wave...
January 16, 2018: Environmental Entomology
https://www.readbyqxmd.com/read/29343279/spatial-distribution-and-habitat-characterization-of-mosquito-species-during-the-dry-season-along-the-mara-river-and-its-tributaries-in-kenya-and-tanzania
#6
Gabriel O Dida, Douglas N Anyona, Paul O Abuom, Daniel Akoko, Samson O Adoka, Ally-Said Matano, Philip O Owuor, Collins Ouma
BACKGROUND: Vector-borne diseases are increasingly becoming a major health problem among communities living along the major rivers of Africa. Although larger water bodies such as lakes and dams have been extensively researched, rivers and their tributaries have largely been ignored. This study sought to establish the spatial distribution of mosquito species during the dry season and further characterize their habitats along the Mara River and its tributaries. METHODS: In this cross-sectional survey, mosquito larvae were sampled along the Mara River, its two perennial tributaries (Amala and Nyangores), drying streams, and adjacent aquatic habitats (e...
January 18, 2018: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/29343251/effects-of-the-isoflavone-genistein-in-early-life-stages-of-the-senegalese-sole-solea-senegalensis-role-of-the-survivin-and-proliferation-versus-apoptosis-pathways
#7
Carmen Sarasquete, María Úbeda-Manzanaro, Juan B Ortiz-Delgado
BACKGROUND: Phytochemical flavonoids are widely distributed in the environment and are derived from many anthropogenic activities. The isoflavone genistein is a naturally occurring compound found in soya products that are habitual constituents of the aquafeeds. This isoflavone possesses oestrogenic biological activity and also apoptotic properties. The present study has been performed to determine the effects of the genistein in the early life stages of the flatfish Senegalese sole during the first month of larval life, and it is focused especially at the metamorphosis, analysing the expression transcript levels and the immunohistochemical protein patterns implicated in the cell proliferation and apoptosis pathways (proliferation cellular/PCNA, anti-apoptosis Survivin/BIRC-5, death receptors/Fas, and Caspases)...
January 17, 2018: BMC Veterinary Research
https://www.readbyqxmd.com/read/29340784/a-new-flesh-fly-species-diptera-sarcophagidae-parasitic-on-leptodactylid-frogs
#8
Pablo Ricardo Mulieri, Eduardo Federico Schaefer, Marta Inés Duré, Cynthya Elizabeth González
Here we describe a new species of sarcophagid fly reared from larvae found feeding on three species of leptodactylid frogs collected in subtropical Corrientes Province in northeastern Argentina. Our species description is based on adult male and female external morphology and genitalia. Adult males and females of the new species were associated with certainty because all specimens studied were reared from single clutches of larvae on each of three infested frogs. Thus, adult males and females reared from each clutch were siblings that emerged almost simultaneously...
January 17, 2018: Parasitology Research
https://www.readbyqxmd.com/read/29340603/characterization-of-antibiosis-to-diabrotica-speciosa-coleoptera-chrysomelidae-in-brazilian-maize-landraces
#9
Eduardo Neves Costa, Luciano Nogueira, Bruno Henrique Sardinha de Souza, Zulene Antônio Ribeiro, Helder Louvandini, Sarah Natalie Zukoff, Arlindo Leal Boiça Júnior
Resistance to insect pests can be found in several native, landrace plants and can be an important alternative to conventional control methods. Diabrotica speciosa (Germar) (Coleoptera: Chrysomelidae) larvae are important maize (Zea mays L.) (Cyperales: Poaceae) root pests and finding native resistance in landraces would greatly contribute to maize-breeding programs aimed at controlling this pest. This study investigated whether the growth, survival, oviposition rhythm, fecundity, and fertility of D. speciosa are negatively influenced by specific maize landraces, and the existence of any morphological barriers in the roots that may correlate with plant resistance to the larval attack...
January 11, 2018: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29340533/more-than-two-decades-after-the-introduction-of-limnoperna-fortunei-dunker-1857-in-la-plata-basin
#10
M A Pessotto, M G Nogueira
The golden mussel, Limnoperna fortunei, is an Asian freshwater bivalve introduced in South America in the beginning of the 1990's, probably through ballast water releases in La Plata River estuary. It dispersed north through Paraná, Uruguay and Paraguay Rivers. The study evaluated the macroscale (18° to 34° S; 45° to 60° W) distribution of L. fortunei (larval stages) in the main rivers and reservoirs of La Plata Basin. Samplings were performed through 68 µm vertical plankton net hauls. Limnological variables were simultaneously determined...
January 15, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/29340532/effects-of-light-dark-cycle-on-the-spatial-distribution-and-feeding-activity-of-fish-larvae-of-two-co-occurring-species-pisces-hypophthalmidae-and-sciaenidae-in-a-neotropical-floodplain-lake
#11
P H S Picapedra, P V Sanches, F A Lansac-Tôha
Most studies on mechanisms regulating fish larvae processes have focused on assessing the isolated effects of food distribution and feeding behavior. However, in natural ecosystems, fish larvae may strongly interact with zooplankton organisms in an array of complex, direct and indirect interdependencies. This study analyzed the spatial distribution, diet and feeding behavior of early stages of Hypophthalmus edentatus and Plagioscion squamosissimus, two fish species co-occurring in an isolated floodplain lake, during the light-dark cycle...
January 15, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/29340386/on-chip-functional-neuroimaging-with-mechanical-stimulation-in-caenorhabditis-elegans-larvae-for-studying-development-and-neural-circuits
#12
Yongmin Cho, David N Oakland, Sol Ah Lee, William R Schafer, Hang Lu
Mechanosensation is fundamentally important for the abilities of an organism to experience touch, hear sounds, and maintain balance. Caenorhabditis elegans is a powerful system for studying mechanosensation as this worm is well suited for in vivo functional imaging of neurons. Many years of research using labor-intensive methods have generated a wealth of knowledge about mechanosensation in C. elegans, and the recent microfluidic-based platforms continue to push the boundary for this field. However, developmental aspects of sensory biology, including mechanosensation, are still not fully understood...
January 17, 2018: Lab on a Chip
https://www.readbyqxmd.com/read/29339342/transgenerational-impairments-of-reproduction-and-development-of-the-marine-invertebrate-crepidula-onyx-resulted-from-long-term-dietary-exposure-of-2-2-4-4-tetrabromodiphenyl-ether-bde-47
#13
Beverly H K Po, Jill M Y Chiu
Polybrominated diphenyl ethers have become ubiquitous in the environment and elevated concentrations have often been found in marine organisms. Using the gastropod Crepidula onyx as a study model, this multigenerational study sets out to test the hypotheses that 1) parental dietary exposure to environmentally realistic levels of 2,2',4,4'-tetrabrominated diphenyl ether (BDE-47) would lead to transgenerational impairments on fitness traits of marine invertebrates, and 2) the organisms might develop adaptation/acclimation after exposure for one or more generations...
January 12, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29339232/diapause-in-drosophila-melanogaster-photoperiodicity-cold-tolerance-and-metabolites
#14
Ane Martin Anduaga, Dora Nagy, Rodolfo Costa, Charalambos P Kyriacou
Unlike many insects where photoperiod per se induces diapause, reproductive arrest in Drosophila melanogaster adult females is observed at colder temperatures and can be enhanced by shorter photoperiods. Traditional experimental protocols raise flies at 25°C from the larval stage and then the adults are placed at 12°C for between 12 and 28 days. After 12 days diapause levels are usually higher than at 28 days, suggesting that the flies are in a cold induced quiescence, rather than a true diapause. By raising flies at more realistic lower temperatures, we observe quite dramatic and counter-intuitive effects on diapause, whose levels nevertheless correlate with various indices of cryoprotectant metabolites as well as resistance to chill shock...
January 12, 2018: Journal of Insect Physiology
https://www.readbyqxmd.com/read/29339143/gene-silencing-reveals-multiple-functions-of-na-k-atpase-in-the-salmon-louse-lepeophtheirus-salmonis
#15
Anna Z Komisarczuk, Heidi Kongshaug, Frank Nilsen
Na+/K+-ATPase has a key function in a variety of physiological processes including membrane excitability, osmoregulation, regulation of cell volume, and transport of nutrients. While knowledge about Na+/K+-ATPase function in osmoregulation in crustaceans is extensive, the role of this enzyme in other physiological and developmental processes is scarce. Here, we report characterization, transcriptional distribution and likely functions of the newly identified L. salmonis Na+/K+-ATPase (LsalNa+/K+-ATPase) α subunit in various developmental stages...
January 12, 2018: Experimental Parasitology
https://www.readbyqxmd.com/read/29337130/an-organizing-role-for-the-tgf-%C3%AE-signaling-pathway-in-axes-formation-of-the-annelid-capitella-teleta
#16
Alexis R Lanza, Elaine C Seaver
Embryonic organizers are signaling centers that coordinate developmental events within an embryo. Localized to either an individual cell or group of cells, embryonic organizing activity induces the specification of other cells in the embryo and can influence formation of body axes. In the spiralian Capitella teleta, previous cell deletion studies have shown that organizing activity is localized to a single cell, 2d, and this cell induces the formation of the dorsal-ventral axis and bilateral symmetry. In this study, we attempt to identify the signaling pathway responsible for the organizing activity of 2d...
January 11, 2018: Developmental Biology
https://www.readbyqxmd.com/read/29336997/modulation-of-nonessential-amino-acid-biosynthetic-pathways-in-virulent-hessian-fly-larvae-mayetiola-destructor-feeding-on-susceptible-host-wheat-triticum-aestivum
#17
Subhashree Subramanyam, Jacob T Shreve, Jill A Nemacheck, Alisha J Johnson, Brandi Schemerhorn, Richard H Shukle, Christie E Williams
Compatible interactions between wheat (Triticum aestivum), and its dipteran pest Hessian fly (Hf, Mayetiola destructor) result in successful establishment of larval feeding sites rendering the host plant susceptible. Virulent larvae employ an effector-based feeding strategy to reprogram the host physiology resulting in formation of a protein- and sugar-rich nutritive tissue beneficial to developing larvae. Previous studies documented increased levels of nonessential amino acids (NAA; that need not be received through insect diet) in the susceptible wheat in response to larval feeding, suggesting importance of plant-derived NAA in larval nutrition...
January 11, 2018: Journal of Insect Physiology
https://www.readbyqxmd.com/read/29335790/echinococcus-multilocularis-cestoda-cyclophyllidea-taeniidae-origin-differentiation-and-functional-ultrastructure-of-the-oncospheral-tegument-and-hook-region-membrane
#18
Zdzisław Świderski, Jordi Miquel, Samira Azzouz-Maache, Anne-Françoise Pétavy
Both the oncospheral tegument and the hook region membrane (HRM) of Echinococcus multilocularis hexacanths originate from a syncytial binucleate complex that appears in the early stage of morphogenesis and organogenesis of the hexacanth larva. The primordium of this binucleate complex forms a binucleate syncytial cap or "calotte" situated beneath the inner envelope at one pole of the developing embryo. During oncospheral differentiation, the binucleate perikaryon of the syncytial cap is sunk progressively deeper into the central part of the embryo, but remains always connected with the distal cytoplasm by a tendrillar cytoplasmic connection or bridge...
January 15, 2018: Parasitology Research
https://www.readbyqxmd.com/read/29334340/identification-of-anti-filarial-leads-against-aspartate-semialdehyde-dehydrogenase-of-wolbachia-endosymbiont-of-brugia-malayi-combined-molecular-docking-and-molecular-dynamics-approaches
#19
Dhamodharan Prabhu, Sundaraj Rajamanikandan, Mathimaran Amala, Surekha Kanagarajan, Jeyaraman Jeyakanthan
Lymphatic filariasis is a debilitating vector borne parasitic disease that infects human lymphatic system by nematode Brugia malayi. Currently available anti-filarial drugs are effective only on the larval stages of parasite. So far, no effective drugs are available for humans to treat filarial infections. In this regard, aspartate semialdehyde dehydrogenase (ASDase) in lysine biosynthetic pathway from Wolbachia endosymbiont Brugia malayi represents an attractive therapeutic target for the development of novel anti-filarial agents...
January 15, 2018: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/29332146/mercury-concentrations-in-northern-two-lined-salamanders-from-stream-ecosystems-in-garrett-county-maryland
#20
Mark S Castro, Robert H Hilderbrand, Morgan Kaumeyer
The purpose of this study was to increase our understanding of the bioaccumulation of mercury in northern two-lined salamanders (Eurycea bislineata bislineata) in freshwater stream ecosystems. We collected 111 adults and 131 larval northern two-lined salamanders from six streams in Garrett County, Maryland. These salamanders were collected in April, July, and September 2010. We measured the size and tissue mercury content in all of these salamanders. We also measured the total and methyl mercury concentrations in stream water on monthly basis from April through December 2010...
January 13, 2018: Archives of Environmental Contamination and Toxicology
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