THE CADDIS-FLIES (TRICHOPTERA) OF JAPAN.—II
نویسندگان
چکیده
منابع مشابه
Jumping mechanisms in adult caddis flies (Insecta, Trichoptera).
To understand the jumping mechanisms and strategies of adult caddis flies, leg morphology and movements were analysed in three species with mean masses of 3.9 to 38 mg. Two distinct jumping strategies were found. First (67% of 90 jumps), take-off was propelled solely by the middle and hind legs while the wings remained closed. Second (33% of jumps), the same leg movements were combined with win...
متن کاملThe Stimulus for Case-building Activity in Caddis-worms (trichoptera).
In four species of caddis-worms,Ptilostomis semifasciata (Say), Platycentropus radiatus (Say), Limnephilus indivisus Walker, and Pycnopsyche guttifer (Walker), removal of the anal hooks and the posterior hair sensilla s ignscantly prolonged case-building activity with a resulting increase in case production. The extensive building was of the rough provisional type, which is normally completed w...
متن کاملOccupational allergy after exposure to caddis flies at a hydroelectric power plant.
A cross sectional survey was conducted in a hydroelectric power plant in which the workforce was exposed to large numbers of caddis flies. 28 of 57 employees participated. About 50% of the participants reported work related eye, nose, and sinus symptoms and wheezing. Working in locations with greater exposure to caddis flies was significantly associated with work related symptoms. 17 workers (6...
متن کاملMicrosporidia in aquatic microcrustacea: the copepod microsporidium Marssoniella elegans Lemmermann, 1900 revisited.
Marssoniella elegans Lemmermann, 1900, a parasite of ovarial tissues of the copepod Cyclops vicinus Uljanin, 1875, was studied as a representative of aquatic-clade microsporidia which form "heteroinfectious spores" (spores not infective to the original host as opposed to "homoinfectious spores" which are infective for the original host) and which thus should require an alternate host. Several s...
متن کاملthe effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)
cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
ذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Canadian Entomologist
سال: 1915
ISSN: 0008-347X,1918-3240
DOI: 10.4039/ent4790-3