Results 41 to 50 of about 9,417 (161)

Numerical investigation on the effect of stroke plane inclination on the aerodynamic performance of dragonfly take-off flight [PDF]

MATEC Web of Conferences
A numerical investigation is carried out to study the role of inclined stroke plane on the aerodynamic performance of a dragonfly during a take-off flight.
Tiwari Shubham, Madan Sejal, Chandel Sunil   +2 more
doaj   +1 more source

Population structure and speciation in the dragonfly Sympetrum striolatum/nigrescens (Odonata: Libellulidae): An analysis using AFLP markers

European Journal of Entomology, 2009
There has been a long-standing debate as to whether Sympetrum striolatum (Charpentier, 1840) and the darker northern form, S. nigrescens (Lucas, 1912) should be recognised as separate species of dragonfly.
Katharine A. PARKES, William AMOS, Norman W. MOORE, Joseph I. HOFFMAN, Janet MOORE   +4 more
doaj   +1 more source

Adult emergence of Phyllocycla Calvert, 1948 (Odonata: Gomphidae) in artificial environments [PDF]

Acta Limnologica Brasiliensia
Aim This study aimed to analyze aspects of adult emergence of Phyllocycla Calvert, 1948 (Odonata: Gomphidae) in artificial environments. Samplings were conducted in Sanharó stream, Caxias municipality, Maranhão State, Brazil.
Carolina Gomes Viana, Lucas Pereira-Moura, Daniel Silas Veras   +2 more
doaj   +1 more source

Finding Isolated Aquatic Habitat: Can Beggars Be Choosers?

Diversity
In a two-year field study across 58 isolated wetlands in Texas (USA), we examined whether odonate (Insecta: Odonata) assemblages were structured by local environmental filters or instead simply reflected the use of any available water in this semi-arid ...
Danielle M. Husband, Nancy E. McIntyre
doaj   +1 more source

Odonata: Who They Are and What They Have Done for Us Lately: Classification and Ecosystem Services of Dragonflies

Insects, 2019
Odonata (dragonflies and damselflies) are well-known but often poorly understood insects. Their phylogeny and classification have proved difficult to understand but, through use of modern morphological and molecular techniques, is becoming better ...
Michael L. May
doaj   +1 more source

Demography and Behaviour of Teinopodagrion oscillans (Odonata: Megapodagrionidae) in a Protected Area of the Colombian Andean Region

Insects
The demography and behaviour of Teinopodagrion oscillans was studied in a protected area in the Andean region of Colombia. Adult damselflies were individually marked, and using their recapture histories, we estimated survival, longevity, sex ratio, and ...
Fredy Palacino-Rodríguez, Diego Andres Palacino, Andrea Penagos Arevalo, Adolfo Cordero-Rivera   +3 more
doaj   +1 more source

D2.4 - Dragonflies and insecticides

, 2022
{"references": ["R.H.A. van Grunsven (2022), Dragonflies and insecticides"]}
openaire   +1 more source

Mitochondrial Gene Expression of Three Different Dragonflies Under the Stress of Chlorpyrifos

Insects
Chlorpyrifos (CPF) is an organophosphate insecticide that is extensively utilized globally due to its effectiveness against over 200 pest species. CPF exhibits its toxicity primarily through the inhibition of the acetylcholinesterase (AChE) enzyme, while
Yuxin Chen, Ziwen Yang, Zhiqiang Guo, Lemei Zhan, Kenneth B. Storey, Danna Yu, Jiayong Zhang   +6 more
doaj   +1 more source

Dragonflies

, 1978
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +2 more sources

Experimental Investigation on Aerodynamic Performance of Inclined Hovering with Asymmetric Wing Rotation

Biomimetics
This study presents a model experiment method that can accurately reproduce the flapping motion of insect wings and measure related unsteady aerodynamic data in real time.
Mengzong Zheng, Liansong Peng, Guanting Su, Tianyu Pan, Qiushi Li   +4 more
doaj   +1 more source