scholarly journals Chemical light sticks as bait to trap predaceous aquatic insects: effect of light colour

2018 ◽  
Vol 49 (2) ◽  
pp. 235
Author(s):  
Randy F. Lauff ◽  
Mallory MacDonnell ◽  
Barry R. Taylor
Keyword(s):  
Aquatic Insects ◽  
Light Trapping ◽  
Equal Frequency ◽  
Baited Traps ◽  
Freshwater Habitats ◽  
Novel Method ◽  
Unknown Component ◽  
Water Bugs ◽  
Lentic Systems ◽  
Effect Of Light

We measured the efficiency of floating minnow-traps (Gee traps), unbaited or baited with red, green, blue, or white chemical light sticks (glowsticks) to trap large, predaceous, aquatic beetles (Coleoptera) and bugs (Hemiptera) in 50 fresh water, lentic systems in northern Nova Scotia, Canada. Standard minnow-traps buoyed with Styrofoam® floats were set overnight in a variety of freshwater habitats, including ponds, marshes, bog pools and vegetated lake margins throughout the ice-free seasons over three years, for a total of 695 trap-nights. Giant Water Bugs (Lethocerus americanus) were captured with equal frequency in traps baited with any colour glowstick and in unbaited controls. Brown Waterscorpions (Ranatra fusca) were significantly more abundant in light-baited traps than in dark controls, and showed a strong preference for green lures over other colours. The large, Vertical Diving Beetle Dytiscus verticalis was caught significantly more than expected with white or red lures and significantly less with green or blue lures; males were caught even less often with green or blue lures than in unbaited controls. Our results reveal a heretofore unknown component of the biology of these insects, and suggest a novel method for simple and effective sampling of aquatic insects in still waters.Keywords: light; trapping; phototaxis; aquatic insects; colour

scholarly journals First record of acari Arrenurus Dugès, 1834 as a parasite of Odonata species in Brazil

2013 ◽  
Vol 13 (4) ◽  
pp. 365-367 ◽  
Author(s):  
Marciel Elio Rodrigues ◽  
Cesar Carriço ◽  
Zeneida Teixeira Pinto ◽  
Paloma Martins Mendonça ◽  
Margareth Maria de Carvalho Queiroz
Keyword(s):  
Aquatic Insects ◽  
First Record ◽  
Water Mites ◽  
Freshwater Habitats

Water mites are common and widespread parasites of some aquatic insects in freshwater habitats. This is the first record of acari Arrenurus Dugès, 1834, as a parasite of Odonata in Brazil. Water mites were sampled from Miathyria marcella (Selys, 1857) and Ischnura fluviatilis (Selys, 1876).

Chemiluminescence - A Novel Method in the Research of Degradation of Paper. I. The Effect of Light on Stacked Sheets of Paper

2007 ◽  
Vol 247 (1) ◽  
pp. 340-349 ◽  
Author(s):  
Lyda Matisová-Rychlá ◽  
Vladimír Bukovský ◽  
Jozef Rychlý ◽  
Martina Pleteníková
Keyword(s):  
Novel Method ◽  
Effect Of Light

scholarly journals Giant Water Bugs, Electric Light Bugs, Lethocerus, Abedus, Belostoma (Insecta: Heteroptera: Belostomatidae)

EDIS ◽  
1969 ◽  
Vol 2005 (1) ◽  
Author(s):  
Paul M. Choate
Keyword(s):  
Aquatic Insects ◽  
Cooperative Extension Service ◽  
Small Fish ◽  
South American ◽  
South American Species ◽  
University Of Florida ◽  
Large Numbers ◽  
Abdominal Appendages ◽  
Electric Light ◽  
Water Bugs

The heteropteran family Belostomatidae contains the giant water bugs. These large, predatory, aquatic insects have the largest body size among the Heteroptera. Adults of some South American species reach 4 inches in length. Individuals occur in ponds and ditches where they suspend below the surface, respiring through two abdominal appendages which act as siphons. During mating season they fly from pond to pond or pool of water. It is during these flights that these insects fly to lights in large numbers, earning their other common name, "electric light bugs". Individuals are capable of inflicting a painful bite with their strong beak, and may also pinch with their front legs. Individuals prey on aquatic insects, small fish, frogs, tadpoles, small birds, and other organisms they are able to capture. Powerful enzymes are injected into prey to kill them. Adults of Lethocerus are considered a delicacy in Asia, and are eaten both fresh and cooked. This document is EENY-301, one of a series of Featured Creatures from the Entomology and Nematology Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Published: July 2003. Revised: October 2003. EENY-301/IN578: Giant Water Bugs, Electric Light Bugs, Lethocerus, Abedus, Belostoma (Insecta: Hemiptera: Belostomatidae) (ufl.edu)

scholarly journals Variability in mosquito community composition associated with estuarine wetlands in Northern NSW, Australia

2021 ◽  
Author(s):  
Cameron Ewart Webb ◽  
Jayne Hanford ◽  
Michael Bald ◽  
Scott Roberts
Keyword(s):  
River Estuary ◽  
Adult Mosquito ◽  
Control Programs ◽  
Estuarine Wetlands ◽  
Baited Traps ◽  
Culex Annulirostris ◽  
Freshwater Habitats ◽  
Abundance And Diversity ◽  
Mosquito Communities ◽  
And Control

The Northern Rivers region of NSW, Australia, is well documented as being impacted by nuisance-biting mosquitoes and mosquito-borne disease. Mosquitoes of greatest concern are those associated with estuarine and brackish water habitats associated with coastal wetlands and understanding the spatial variability in abundance and diversity will assist the assessment of risk and inform surveillance and control programs. Adult mosquito populations were sampled, using carbon dioxide baited traps, at four locations within the Richmond River estuary at Ballina, NSW, Australia, during January and February 2021. Concomitant sampling of habitats for immature mosquitoes was also undertaken. A total of 16,467 mosquitoes was collected at all sites across two sampling periods with the most abundant mosquitoes, Verrallina funerea, Aedes vigilax, and Culex sitiens, those typically associated with estuarine environments. Culex annulirostris, a mosquito associated with freshwater habitats, and Aedes notoscriptus, a mosquito associated with water-holding containers, were also commonly collected. The mosquito communities differed, in relative abundance and species richness, between the four locations. The result highlighted the need for authorities to understand the variability in productivity of potential mosquito habitats, beyond those determinants associated with vegetation communities alone, when assessing suitable locations of mosquito surveillance and integrated mosquito management.

Polarization pattern of freshwater habitats recorded by video polarimetry in red, green and blue spectral ranges and its relevance for water detection by aquatic insects

1997 ◽  
Vol 200 (7) ◽  
pp. 1155-1163 ◽  
Author(s):  
G Horváth ◽  
D Varjú
Keyword(s):  
Aquatic Insects ◽  
Brewster Angle ◽  
Degree Of Polarization ◽  
Visible Range ◽  
Horizontal Polarization ◽  
Advantages And Disadvantages ◽  
Vector Component ◽  
Water Detection ◽  
Freshwater Habitats ◽  
Spectral Ranges

The reflection-polarization patterns of small freshwater habitats under clear skies can be recorded by video polarimetry in the red, green and blue ranges of the spectrum. In this paper, the simple technique of rotating-analyzer video polarimetry is described and its advantages and disadvantages are discussed. It is shown that the polarization patterns of small water bodies are very variable in the different spectral ranges depending on the illumination conditions. Under clear skies and in the visible range of the spectrum, flat water surfaces reflecting light from the sky are most strongly polarized in the blue range. Under an overcast sky radiating diffuse white light, small freshwater habitats are characterized by a high level of horizontal polarization at or near the Brewster angle in all spectral ranges except that in which the contribution of subsurface reflection is large. In a given spectral range and at a given angle of view, the direction of polarization is horizontal if the light mirrored from the surface dominates and vertical if the light returning from the subsurface regions dominates. The greater the degree of dominance, the higher the net degree of polarization, the theoretical maximum value being 100 % at the Brewster angle for the horizontal E-vector component and approximately 30 % at flat viewing angles for the vertical E-vector component. We have made video polarimetric measurements of differently coloured fruits and vegetables to demonstrate that polarized light in nature follows this general rule. The consequences of the reflection-polarization patterns of small bodies of water for water detection by polarization-sensitive aquatic insects are discussed.

Effect of light trapping in an amorphous silicon solar cell

2015 ◽  
Vol 587 ◽  
pp. 117-125 ◽  
Author(s):  
S.M. Iftiquar ◽  
Juyeon Jung ◽  
Hyeongsik Park ◽  
Jaehyun Cho ◽  
Chonghoon Shin ◽  
...  
Keyword(s):  
Solar Cell ◽  
Amorphous Silicon ◽  
Silicon Solar Cell ◽  
Light Trapping ◽  
Amorphous Silicon Solar Cell ◽  
Effect Of Light

scholarly journals Trichomycetes from lentic and lotic aquatic habitats in Ontario, Canada

Botany ◽  
2008 ◽  
Vol 86 (12) ◽  
pp. 1449-1466 ◽  
Author(s):  
D. B. Strongman ◽  
Merlin M. White
Keyword(s):  
New Species ◽  
Aquatic Insects ◽  
Ecological Group ◽  
Aquatic Habitats ◽  
Arthropod Communities ◽  
Black Fly ◽  
Lotic Habitats ◽  
Lotic Environments ◽  
First Time ◽  
Lentic Systems

Fungi and protists make up an ecological group, trichomycetes, that inhabit the guts of invertebrates, mostly aquatic insects. Trichomycetes are reported herein from arthropods collected in lotic habitats (fast flowing streams) and lentic environments (ponds, ditches, seeps, and lakes) from 11 sites in Algonquin Park and 6 other sites in Ontario, Canada. Thirty-two trichomycete species were recovered, including 7 new species: Legeriomyces algonquinensis , Legeriosimilis leptocerci , Legeriosimilis whitneyi , and Paramoebidium umbonatum are described from mayfly nymphs (Ephemeroptera); Pennella digitata and Glotzia incilis from black fly and midge larvae (Diptera), respectively; and Arundinula opeongoensis from a crayfish (Crustacea). Legeriomyces rarus Lichtw. & M.C. Williams and Stachylina penetralis Lichtw. are new North American records, and seven species are documented for the first time in Canada. More common and widely distributed trichomycete species such as Harpella melusinae Léger & Duboscq and Smittium culicis Manier, were also recovered. Most previous studies on trichomycetes have been done primarily in lotic environments but clearly lentic systems (e.g., ponds and lakes) harbour diverse arthropod communities and further exploration of these habitats will continue to increase our knowledge of trichomycete diversity.

New species and geographical distribution of trichomycetes (gut fungi) in a novel host, caddisfly (Trichoptera)

Botany ◽  
2019 ◽  
Vol 97 (10) ◽  
pp. 537-545
Author(s):  
D.B. Strongman ◽  
M.M. White
Keyword(s):  
Seasonal Variation ◽  
New Species ◽  
Nova Scotia ◽  
Geographical Distribution ◽  
Aquatic Insects ◽  
Herbivorous Insects ◽  
Caddisfly Larvae ◽  
Novel Host ◽  
Freshwater Habitats ◽  
Common Group

Trichomycetes are fungi and protists living in the guts of arthropods. Herbivorous insects in freshwater habitats commonly house these microbes, and there are over 300 species described. One very common group of aquatic insects occurring in most freshwater systems is caddisflies, belonging to the Order Trichoptera. Although these are potentially good hosts for trichomycetes, there has been little published on trichomycetes in this host and none have been described from caddisflies. We collected and dissected caddisfly larvae from multiple sites in Canada from 2001 to 2018 and describe five new species of trichomycetes from trichopteran larvae. Data are presented on the prevalence and seasonal variation of trichomycetes in caddisfly larvae at one site in Nova Scotia where multi-year collections were made.

A NOVEL METHOD FOR STUDYING THRESHOLD LEVELS FOR POSITIVE PHOTOTAXIS IN INSECTS

2021 ◽  
Author(s):  
M. Nilsson Tengelin ◽  
A.K. Jägerbrand ◽  
P. Andersson ◽  
S. Källberg
Keyword(s):  
Spectral Composition ◽  
Light Response ◽  
Optical Filters ◽  
Ecological Impacts ◽  
Infrared Light ◽  
Positive Phototaxis ◽  
Threshold Levels ◽  
Light Levels ◽  
Novel Method ◽  
Effect Of Light

This paper presents a novel method for studying threshold levels for positive phototaxis of insects and smaller mobile organisms. Outdoor lighting affects light sensitive species and there is a need to evaluate the effect of light levels, spectral composition of the light and light distribution to mitigate the ecological impacts of the artificial light. For this purpose, a test box investigating the effect of light on insects in a controlled manner has been constructed. The box is equipped with a luminance source and the light levels can be varied from a maximum value continuously down to zero. The spectral composition of the light can be varied by changing the lamp or using optical filters. For visibility of the insects the box has infrared light emitting diodes in the ceiling and two wide-angle cameras monitor the light response. The functionality of the box is tested with the species greater wax moth.

A new species of Hebrus (Hemiptera: Heteroptera: Hebridae) from Argentina

Zootaxa ◽  
2018 ◽  
Vol 4457 (3) ◽  
pp. 474
Author(s):  
CÉSAR ADRIÁN STELLA ◽  
JOSÉ LUIS PALL
Keyword(s):  
New Species ◽  
Central Region ◽  
Small Family ◽  
Freshwater Habitats ◽  
A New Species ◽  
Water Bugs

The Hebridae, commonly known as “velvet water bugs,” is a small family of semiaquatic bugs (Heteroptera: Gerromorpha), distributed worldwide with approximately 220 species in 2 subfamilies and 9 genera. They are small (1.3–3.7 mm) and plump-bodied, brownish to black, and usually densely covered by setae. These predacious bugs inhabit humid terrestrial or marginal freshwater habitats. In Argentina, three species in three genera have been recorded: Hebrus engaeus Drake and Chapman, 1958, Lipogomphus lacuniferus Berg, 1879 and Merragata hebroides White, 1877. The purpose of this contribution is to describe Hebrus alvearensis sp. nov., found in the central region of Argentina, and to present a key for the species of Hebridae present in the country.

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