Ecological Studies on Aquatic Insects. III. Adaptations of Caddisfly Larvae to Swift Streams

Ecology ◽  
1925 ◽  
Vol 6 (2) ◽  
pp. 123-137 ◽  
Author(s):  
G. S. Dodds ◽  
Frederick L. Hisaw
Keyword(s):  
Aquatic Insects ◽  
Ecological Studies ◽  
Caddisfly Larvae

scholarly journals Flight density of the aquatic insect fauna over the water surface in the middle reaches of the Shinano River, Japan, mainly among caddisflies (Trichoptera)

Zoosymposia ◽  
2016 ◽  
Vol 10 (1) ◽  
pp. 203-213
Author(s):  
KIMIO HIRABAYASHI ◽  
ERI IKUTAMA ◽  
KOUSAKU OHKAWA ◽  
RYOICHI ARAI ◽  
TAKAOMI NOMURA ◽  
...  
Keyword(s):  
Aquatic Insects ◽  
Water Surface ◽  
Aquatic Insect ◽  
Relative Number ◽  
Insect Fauna ◽  
River Bed ◽  
Individual Number ◽  
Caddisfly Larvae ◽  
Aquatic Insect Fauna ◽  
The Individual

We focused on the relative number of flying adult caddisflies on the river surface captured by sticky board traps with the aim of elucidating differences in the distribution pattern of caddisfly larvae along the slope in the middle reaches of the Shinano River. The individual number of adult caddisflies caught increased from April and decreased from October. Even in the same middle reaches of a river, there was a large difference geographically in the species captured. Hydroptila sp. was caught mainly downstream of the Taishyobashi Bridge, Psychomyia acutipennis (Ulmer 1908) in the vicinity of the Taishyobashi Bridge, and Stenopsyche marmorata Navás 1920 upstream of the Awasabashi Bridge. It is known that the slope of the Shinano River bed suddenly becomes less and the flow rate slower in the area from the Taishyobashi Bridge to the Awasabashi Bridge, and it was shown that the species composition and number of aquatic insects caught changes with the change in the slope of the river bed.

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.

Radiocesium-bearing microparticles cause a large variation in 137Cs concentration in the aquatic insect, Stenopsyche marmorata, in the Ota River, Fukushima, Japan

2021 ◽  
Author(s):  
Yumiko Ishii ◽  
Hikaru Miura ◽  
Jaeick Jo ◽  
Hideki Tsuji ◽  
Rie Saito ◽  
...  
Keyword(s):  
Aquatic Insects ◽  
Nuclear Power ◽  
Temporal Trends ◽  
Aquatic Insect ◽  
Aquatic Organisms ◽  
Freshwater Ecosystems ◽  
Food Sources ◽  
Caddisfly Larvae ◽  
Fdnpp Accident ◽  
Food Particles

<p>Radiocesium-bearing microparticles (CsMPs), which are insoluble, Cs-bearing, silicate glass particles, have been found in terrestrial and freshwater environments after the TEPCO's Fukushima Daiichi Nuclear Power Plant (FDNPP) accident in Japan. Few studies have investigated the distribution of CsMPs in freshwater ecosystems and their uptake by aquatic organisms. In this study, we determined the uptake of CsMPs by aquatic insects in the Ota River in Fukushima. Although aquatic insects are usually measured for radioactivity in bulk samples of several tens of insects, we investigated the variability of <sup>137</sup>Cs concentration in individual aquatic insects, and the influence of CsMPs on them. Measurement of <sup>137</sup>Cs concentrations in detritivorous caddisfly (Stenopsyche marmorata) larvae and carnivorous dragonfly larvae showed that 3 of 47 caddisfly larvae had considerably higher radioactivity, whereas no such outliers were observed in dragonfly larvae. These caddisfly larvae were confirmed to contain the CsMPs emitted from Unit 2 of the FDNPP, using a scanning electron microscope and radioactivity measurements after isolation of the CsMPs. CsMPs were also found in potential food sources of caddisfly larvae, such as periphyton and drifting particulate organic matter, indicating that larvae may ingest CsMPs along with food particles of similar size. Our study demonstrated that CsMPs could be taken up by aquatic insects and possibly by the fish consuming them. The existence of CsMPs can result in sporadic, extremely high <sup>137</sup>Cs concentrations, and large variations in samples, and consequently obscure the actual transfer and temporal trends of <sup>137</sup>Cs in freshwater ecosystems.</p>

Trichoptera — the newest insect order host of temnocephalans (Platyhelminthes, Temnocephalida) and the description of a new species of Temnocephala from Brazil

Zootaxa ◽  
2011 ◽  
Vol 2975 (1) ◽  
pp. 47 ◽  
Author(s):  
JOSÉ F. R. AMATO ◽  
SUZANA B. AMATO ◽  
SAMANTHA A. SEIXAS ◽  
TEOFÂNIA H. D. A. VIDIGAL ◽  
CYNTHIA DE PAULA ANDRADE
Keyword(s):  
Aquatic Insects ◽  
Rio Grande Do Sul ◽  
Middle Portion ◽  
Insect Order ◽  
Egg Deposition ◽  
Caddisfly Larvae ◽  
Eye Pigmentation ◽  
Size And Morphology ◽  
First Time ◽  
A New Species

Trichoptera Kirby, 1813, is the second order of Insecta Linnaeus, 1758 (after Hemiptera Linnaeus, 1758) to be found hosting temnocephalans anywhere in the world. Temnocephalans were found on caddisfly larvae from the genus Barypenthus Burmeister, 1839 while collecting aquatic insects from a small creek in Serra do Cipó, State of Minas Gerais, Brazil. Thirty-six larvae and their cases were examined, of which 20 (55.5%) were positive for specimens of Temnocephala Blanchard, 1849. Juvenile and adult temnocephalans were always devoid of body pigmentation and were living on the dorsal and ventral body surfaces of the larvae. The eye pigmentation was deep red, disappearing in specimens fixed in ethanol. Eggs were found in larger numbers on the dorsal thoracic segments. The most distinctive characters of the temnocephalans found on caddisfly larvae were found in the cirrus and the vagina. The comparison of the general anatomy and, in particular, the morphology of the cirrus and the vagina with those of Temnocephala curvicirri Amato & Amato, 2005, described from aquatic heteropterans (Belostoma spp.), from the State of Rio Grande do Sul, which is revisited, showed that although these characters are of the same type and nature they are not equal, differing primarily in size and morphology of the cirrus and the muscularity of the middle portion of the vagina. The egg deposition sites are different and the cirrus and the vagina are characterized for the first time as being ‘complex’.

Ecological Studies of Aquatic Insects: Adaptations of Mayfly Nymphs to Swift Streams

Ecology ◽  
1924 ◽  
Vol 5 (2) ◽  
pp. 137-148 ◽  
Author(s):  
G. S. Dodds ◽  
Frederick L. Hisaw
Keyword(s):  
Aquatic Insects ◽  
Ecological Studies
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