Flight capacities of three species of diving beetles (Coleoptera: Dytiscidae) estimated in a flight mill

2020 ◽  
Vol 41 (4) ◽  
pp. 332-338
Author(s):  
Ryosuke Matsushima ◽  
Tomoyuki Yokoi
Keyword(s):  
Flight Mill ◽  
Diving Beetles

scholarly journals Design and Validation of Computerized Flight-Testing Systems with Controlled Atmosphere for Studying Flight Behavior of Red Palm Weevil, Rhynchophorus ferrugineus (Olivier)

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 2112
Author(s):  
Maged Mohammed ◽  
Hamadttu El-Shafie ◽  
Nashi Alqahtani
Keyword(s):  
Flight Tunnel ◽  
Flight Behavior ◽  
Processing Unit ◽  
Controlled Atmosphere ◽  
Rhynchophorus Ferrugineus ◽  
Data Logging ◽  
Red Palm Weevil ◽  
Flight Testing ◽  
Flight Mill ◽  
The Mean

Understanding the flight characteristics of insect pests is essential for designing effective strategies and programs for their management. In this study, we designed, constructed, and validated the performance of modern flight-testing systems (flight mill and flight tunnel) for studying the flight behavior of red palm weevil (RPW) Rhynchophorus ferrugineus (Olivier) under a controlled atmosphere. The flight-testing mill consisted of a flight mill, a testing chamber with an automatically controlled microclimate, and a data logging and processing unit. The data logging and processing unit consisted of a USB digital oscilloscope connected with a laptop. We used MATLAB 2020A to implement a graphical user interface (GUI) for real-time sampling and data processing. The flight-testing tunnel was fitted with a horizontal video camera to photograph the insects during flight. The program of Image-Pro plus V 10.0.8 was used for image processing and numerical data analysis to determine weevil tracking. The mean flight speed of RPW was 82.12 ± 8.5 m/min, and the RPW stopped flying at the temperature of 20 °C. The RPW flight speed in the flight tunnel was slightly higher than that on the flight mill. The angular deceleration was 0.797 rad/s2, and the centripetal force was 0.0203 N when a RPW tethered to the end of the rotating arm. The calculated moment of inertia of the RPW mass and the flight mill's rotating components was 9.521 × 10−3 N m2. The minimum thrust force needed to rotate the flight mill was 1.98 × 10−3 N. Therefore, the minimum power required to rotate the flight mill with the mean revolution per min of 58.02 rpm was approximately 2.589 × 10−3 W. The designed flight-testing systems and their applied software proved productive and useful tools in unveiling essential flight characteristics of test insects in the laboratory.

Taxonomic revision of the Neotropical diving beetles genus Laccodytes Régimbart, 1895 (Coleoptera: Dytiscidae)

Zootaxa ◽  
2010 ◽  
Vol 2347 (1) ◽  
pp. 37 ◽  
Author(s):  
MARIO TOLEDO ◽  
PAUL J. SPANGLER ◽  
MICHAEL BALKE
Keyword(s):  
South America ◽  
Species Identification ◽  
Taxonomic Revision ◽  
Diagnostic Features ◽  
The North ◽  
Centre Of Diversity ◽  
Diving Beetles ◽  
North Eastern ◽  
Species Groups ◽  
North Eastern Part

The Neotropical Laccophilinae genus Laccodytes Régimbart, 1895 is redefined and revised. We recognize ten species, six of which are described as new. We define two species groups: the Laccodytes apalodes-group (L. apalodes Guignot, 1955, L. rondonia sp.n.), and the L. phalacroides-group (L. americanus Peschet, 1919, L. obscuratus sp.n., L. bassignanii sp.n., L. neblinae sp.n., L. olibroides Régimbart, 1895, L. phalacroides Régimbart, 1895, L. takutuanus sp.n., L. androginus sp.n.). Laccophilus pumilio LeConte, 1878, assigned to Laccodytes by Young (1954), belongs to an undescribed genus. Laccodytes species are lotic and most of them inhabit the north-eastern part of South America, apparently with Venezuela and Guyana as centre of diversity. Descriptions, illustrations and SEM photos of habitus, genitals and other diagnostic features are provided for each species, together with habitat notes, when known. We provide a key for species identification.

scholarly journals Swimming behavior of small diving beetles

2006 ◽  
Vol 18 (1/2) ◽  
pp. 46-49 ◽  
Author(s):  
Seiichi SUDO ◽  
Tetsuya YANO ◽  
Yasuhiko KAN ◽  
Yuzuru YAMADA ◽  
Koji TSUYUKI
Keyword(s):  
Swimming Behavior ◽  
Diving Beetles
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