keyword
MENU ▼
Read by QxMD icon Read
search

Odonata

keyword
https://www.readbyqxmd.com/read/28491118/the-head-morphology-of-pyrrhosoma-nymphula-larvae-odonata-zygoptera-focusing-on-functional-aspects-of-the-mouthparts
#1
Sebastian Büsse, Thomas Hörnschemeyer, Stanislav N Gorb
BACKGROUND: The understanding of concerted movements and its underlying biomechanics is often complex and elusive. Functional principles and hypothetical functions of these complex movements can provide a solid basis for biomechanical experiments and modelling. Here a description of the cephalic anatomy of Pyrrhosoma nymphula (Zygoptera, Coenagrionidae) focusing on functional aspects of the mouthparts using micro computed tomography (μCT) is presented. RESULTS: We compared six different instars of the damselfly P...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28480018/elements-of-metacommunity-structure-in-amazonian-zygoptera-among-streams-under-different-spatial-scales-and-environmental-conditions
#2
Leandro Schlemmer Brasil, Thiago Bernardi Vieira, José Max Barbosa de Oliveira-Junior, Karina Dias-Silva, Leandro Juen
An important aspect of conservation is to understand the founding elements and characteristics of metacommunities in natural environments, and the consequences of anthropogenic disturbance on these patterns. In natural Amazonian environments, the interfluves of the major rivers play an important role in the formation of areas of endemism through the historical isolation of species and the speciation process. We evaluated elements of metacommunity structure for Zygoptera (Insecta: Odonata) sampled in 93 Amazonian streams distributed in two distinct biogeographic regions (areas of endemism)...
May 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28303462/congruence-and-the-biomonitoring-of-aquatic-ecosystems-are-odonate-larvae-or-adults-the-most-effective-for-the-evaluation-of-impacts
#3
T P Mendes, J M B Oliveira-Junior, H S R Cabette, J D Batista, L Juen
Odonata have been widely used as indicators for the biomonitoring of terrestrial and aquatic habitats due to their sensitivity to environmental impacts. We aimed to determine whether the larval or adult phases of these insects were the best predictors of variation in habitat parameters and the loss of environmental integrity. Specimens were collected during three seasons (dry, rainy, and ebb) from 12 points in the Suiá-missu River basin, at the headwaters of the Xingu River in Mato Grosso, Brazil. The Protest analysis indicated a high degree of congruence between the assemblages of larvae and adults in streams with varying degrees of habitat integrity (R = 0...
March 16, 2017: Neotropical Entomology
https://www.readbyqxmd.com/read/28303186/incidence-of-wolbachia-in-aquatic-insects
#4
Eric J Sazama, Michael J Bosch, Carmelita S Shouldis, Scot P Ouellette, Jeff S Wesner
Wolbachia is a genus of intracellular bacteria typically found within the reproductive systems of insects that manipulates those systems of their hosts. While current estimates of Wolbachia incidence suggest that it infects approximately half of all arthropod species, these estimates are based almost entirely on terrestrial insects. No systematic survey of Wolbachia in aquatic insects has been performed. To estimate Wolbachia incidence among aquatic insect species, we combined field-collected samples from the Missouri River (251 samples from 58 species) with a global database from previously published surveys...
February 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28285400/how-does-environmental-variation-affect-the-distribution-of-dragonfly-larvae-odonata-in-the-amazon-cerrado-transition-zone-in-central-brazil
#5
T P Mendes, A Luiza-Andrade, H S R Cabette, L Juen
This study investigated the effects of environmental variation on assemblages of dragonfly larvae (Odonata). We hypothesize that there is a significant correlation between species richness, species composition, and abundance of Odonata individuals, and habitat integrity and abiotic variables. To test this hypothesis, we sampled odonate larvae at 12 streams in the Suiá-Miçú River basin in Mato Grosso, Brazil, during three different periods of the year. Local physical and chemical variables (temperature, pH, turbidity, electrical conductivity (EC), dissolved oxygen (DO), total dissolved solids (TDS), and oxidation reduction potential (ORP)) were measured at each site using a multi-parameter probe, and integrity was assessed using the Habitat Integrity Index (HII)...
March 11, 2017: Neotropical Entomology
https://www.readbyqxmd.com/read/28275984/effects-of-human-induced-environmental-changes-on-benthic-macroinvertebrate-assemblages-of-wetlands-in-lake-tana-watershed-northwest-ethiopia
#6
Ayenew Gezie, Wassie Anteneh, Eshete Dejen, Seid Tiku Mereta
Wetlands of Lake Tana Watershed provide various ecological and socioeconomic functions. However, they are losing their vigor at alarming rate due to unwise management. Hence, there is an urgent need to monitor and assess these resources so as to identify the major drivers of its degradation and to provide information for management decisions. In this context, we aimed to assess the effects of human activities on macroinvertebrate assemblages of wetlands in Lake Tana Watershed. Biotic and abiotic data were collected from 46 sampling sites located in eight wetlands...
April 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28271616/evolutionary-ecology-of-opsin-gene-sequence-expression-and-repertoire
#7
Gregory L Owens, Diana J Rennison
Linking molecular evolution to biological function is a long-standing challenge in evolutionary biology. Some of the best examples of this involve opsins, the genes that encode the molecular basis of light reception. In this issue of Molecular Ecology, three studies examine opsin gene sequence, expression and repertoire to determine how natural selection has shaped the visual system. First, Escobar-Camacho et al. () use opsin repertoire and expression in three Amazonian cichlid species to show that a shift in sensitivity towards longer wavelengths is coincident with the long-wavelength-dominated Amazon basin...
March 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28264371/description-of-two-new-i-calicnemia-i-from-vietnam-and-central-laos-with-notes-on-their-congeners-in-vietnam-odonata-platycnemididae
#8
Quoc Toan Phan, Tom Kompier, Haruki Karube
Descriptions are given of two new species of Calicnemia: C. akahara sp. nov. from central and southern Vietnam and C. hamata sp. nov. from central Laos. C. soccifera Yu & Chen, 2013, and C. haksik Wilson & Reels, 2003, are recorded for the first time from Vietnam; C. uenoi Asahina, 1997, is redescribed with new illustrations provided of its anal appendages and genital ligula; and the occurrence of C. mortoni (Laidlaw, 1917) in Vietnam is discussed.
February 16, 2017: Zootaxa
https://www.readbyqxmd.com/read/28264360/new-species-of-the-damselfly-genus-i-argia-i-from-mexico-central-america-and-ecuador-with-an-emphasis-on-costa-rica-insecta-odonata-coenagrionidae
#9
Rosser W Garrison, Natalia VON Ellenrieder
Seven new species of Argia are described, five of which occur in Costa Rica: Argia calverti n. sp. (Holotype ♂, Costa Rica, Cartago Prov., Tapantí Reserve, 1,310 m, 6 vii 1963, F. G. Thompson leg., in FSCA); Argia carolus n. sp. (Holotype ♂, Costa Rica, San José Prov., El Rodeo Biological Reserve, 7 km W of Villa Colón, 9°54' N, 84°16' W, 561 m, 10-13 vii 1990, T. W. Donnelly leg., in FSCA); Argia elongata n. sp. (Holotype ♂, Costa Rica, Cartago Prov., Reventazón river, SE of Turrialba by highway 10, 9°52'56'' N, 83°38'49'' W, 561 m, 10 viii 1979, R...
February 20, 2017: Zootaxa
https://www.readbyqxmd.com/read/28261473/plant-structural-complexity-and-mechanical-defenses-mediate-predator-prey-interactions-in-an-odonate-bird-system
#10
Patrick Grof-Tisza, Eric LoPresti, Sacha K Heath, Richard Karban
Habitat-forming species provide refuges for a variety of associating species; these refuges may mediate interactions between species differently depending on the functional traits of the habitat-forming species. We investigated refuge provisioning by plants with different functional traits for dragonfly and damselfly (Odonata: Anisoptera and Zygoptera) nymphs emerging from water bodies to molt into their adult stage. During this period, nymphs experience high levels of predation by birds. On the shores of a small pond, plants with mechanical defenses (e...
March 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28238172/local-versus-landscape-spatial-influence-on-biodiversity-a-case-study-across-five-european-industrialized-areas
#11
E Piano, M Isaia, E Falasco, V La Morgia, G Soldato, F Bona
Land use change-mostly habitat loss and fragmentation-has been recognized as one of the major drivers of biodiversity loss worldwide. According to the habitat amount hypothesis, these phenomena are mostly driven by the habitat area effect. As a result, species richness is a function of both the extent of suitable habitats and their availability in the surrounding landscape, irrespective of the dimension and isolation of patches of suitable habitat. In this context, we tested how the extent of natural areas, selected as proxies of suitable habitats for biodiversity, influences species richness in highly anthropogenic landscapes...
March 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28211329/first-report-of-perfluoroalkyl-substances-in-south-african-odonata
#12
Velesia Lesch, Hindrik Bouwman, Ayako Kinoshita, Yasuyuki Shibata
Perfluorinated substances are global and ubiquitous pollutants. However, very little is known about these substances in invertebrates, and even less in terrestrial invertebrates in particular. We analysed adult male dragonflies from six sites in South Africa for perfluoroalkyl substances (PFASs), including perfluorooctanesulfonic acid (PFOS), perfluorooctanoic acid (PFOA), perfluorononanoic acid (PFNA), perfluorodecanoic acid (PFDA), perfluro-n-undecanoic acid (PFUnA), perfluoro-n-dodecanoic acid (PFDoA), perfluorohexanoic acid (PFHxA), and perfluorohexane sulfonic acid (PFHxS)...
May 2017: Chemosphere
https://www.readbyqxmd.com/read/28207806/trace-element-accumulation-in-lotic-dragonfly-nymphs-genus-matters
#13
Dean E Fletcher, Angela H Lindell, Garrett K Stillings, Susan A Blas, J Vaun McArthur
Constituents of coal combustion waste (CCW) expose aquatic organisms to complex mixtures of potentially toxic metals and metalloids. Multi-element trace element analyses were used to distinguish patterns of accumulation among 8 genera of dragonfly nymphs collected from two sites on a CCW contaminated coastal plain stream. Dragonfly nymphs are exceptional for comparing trace element accumulation in syntopic macroinvertebrates that are all predators within the same order (Odonata) and suborder (Anisoptera), but differ vastly in habitat use and body form...
2017: PloS One
https://www.readbyqxmd.com/read/28183102/-i-gomphus-i-i-kinzelbachi-i-schneider-1984-in-iran-identification-habitat-and-behaviour-odonata-gomphidae
#14
Thomas Schneider, Dietmar Ikemeyer, Sónia Ferreira, Ole Müller
Gomphus kinzelbachi was described by Wolfgang Schneider (1984) on the basis of a single teneral male captured by B. L. Sage on the Alwand River in eastern Iraq. In late April to early May 2016 two of the authors (TS and DI) discovered three individual-rich populations of this species on the large lowland river Karkeh in southwestern Iran (Khuzestãn). This is the first report of a breeding population of this species. Based on collected material we confirmed the structural differences of the male secondary genitalia between G...
January 11, 2017: Zootaxa
https://www.readbyqxmd.com/read/28155593/dna-barcodes-for-dragonflies-and-damselflies-odonata-of-mindanao-philippines
#15
Princess Angelie S Casas, Kong-Wah Sing, Ping-Shin Lee, Olga M Nuñeza, Reagan Joseph T Villanueva, John-James Wilson
Reliable species identification provides a sounder basis for use of species in the order Odonata as biological indicators and for their conservation, an urgent concern as many species are threatened with imminent extinction. We generated 134 COI barcodes from 36 morphologically identified species of Odonata collected from Mindanao Island, representing 10 families and 19 genera. Intraspecific sequence divergences ranged from 0 to 6.7% with four species showing more than 2%, while interspecific sequence divergences ranged from 0...
February 3, 2017: Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis
https://www.readbyqxmd.com/read/28137743/genomic-features-of-the-damselfly-calopteryx-splendens-representing-a-sister-clade-to-most-insect-orders
#16
Panagiotis Ioannidis, Felipe A Simao, Robert M Waterhouse, Mosè Manni, Mathieu Seppey, Hugh M Robertson, Bernhard Misof, Oliver Niehuis, Evgeny M Zdobnov
Insects comprise the most diverse and successful animal group with over one million described species that are found in almost every terrestrial and limnic habitat, with many being used as important models in genetics, ecology, and evolutionary research. Genome sequencing projects have greatly expanded the sampling of species from many insect orders, but genomic resources for species of certain insect lineages have remained relatively limited to date. To address this paucity, we sequenced the genome of the banded demoiselle, Calopteryx splendens, a damselfly (Odonata: Zygoptera) belonging to Palaeoptera, the clade containing the first winged insects...
February 1, 2017: Genome Biology and Evolution
https://www.readbyqxmd.com/read/28118094/wrecking-the-curve-altered-functional-response-of-tetragoneuria-odonata-corduliidae-naiads-infected-with-metacercariae-of-haematoloechus-floedae
#17
James C Leaphart, Derek A Zelmer
The ubiquity of host-parasite interactions and their potential for substantial representation, in terms of overall biomass, within ecosystems suggests that parasites have the capacity to influence energy flow within an ecosystem. Although the influence of certain parasites on prey behavior has been well documented, parasites could also exert an influence on ecosystem dynamics by influencing predator feeding behavior. The functional response of Tetragoneuria naiads was characterized by presenting naiads with varying abundances of Daphnia magna , after which a subset of the naiads were exposed to cercariae of Haematoloechus floedae, and the feeding trials repeated for both the control and exposed odonates...
April 2017: Journal of Parasitology
https://www.readbyqxmd.com/read/28071812/recovery-of-aquatic-insect-mediated-methylmercury-flux-from-ponds-following-drying-disturbance
#18
Matthew M Chumchal, Ray W Drenner, Frank M Greenhill, James H Kennedy, Ashlyn E Courville, Charlie A A Gober, Luke O Lossau
Small ponds exist across a permanence gradient, and pond permanence is hypothesized to be a primary determinant of insect community structure and insect-mediated methylmercury (MeHg) flux from ponds to the surrounding terrestrial landscape. The present study describes the first experiment examining the recovery of insect-mediated MeHg flux following a drying disturbance that converted permanent ponds with insectivorous fish to semipermanent ponds without fish. Floating emergence traps were used to collect emergent insects for 10 wk in the spring and summer from 5 ponds with fish (permanent) and 5 ponds that were drained to remove fish, dried, and refilled with water (semipermanent)...
January 10, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28030346/new-records-of-host-parasite-relationships-between-coenagrion-scitulum-rambur-1842-odonata-and-water-mite-larvae-hydrachnidia-in-core-and-edge-host-populations
#19
Andrzej Zawal, Lieven Therry, Robby Stoks, Grzegorz Michoński
The relationships between water mite larvae parasitizing Coenagrion scitulum in core and edge populations were described. A total of 636 larvae of 7 water mite species were found on 143 C. scitulum adults (82 females and 61 males). C. scitulum was recorded for the first time as a host species for Arrenurus cuspidator, A. bruzelii, A. bicuspidator, A. tricuspidator, A. claviger and Hydryphantes octoporus. The degree of infestation by particular parasite species was typical for these species. In contrast, the parasites' preferences for host body parts were not typical, as they preferred abdominal segments 2-4, which in earlier studies had been avoided by water mite larvae...
March 1, 2017: Acta Parasitologica
https://www.readbyqxmd.com/read/27988722/new-species-of-i-protosticta-i-selys-from-vietnam-with-a-key-to-the-males-of-the-i-p-curiosa-i-group-odonata-platystictidae
#20
Tom Kompier
Three new species of Protosticta Selys, 1855, are described from Vietnam: P. proboscis spec. nov. and P. albifrons spec. nov., while P. satoi dark form is elevated to specific status as P. nigra spec. nov. based on structural and morphological differences. The female of P. linnaei is described for the first time and a key provided to the males of the P. curiosa group in Vietnam.
November 15, 2016: Zootaxa
keyword
keyword
105058
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"