نتایج جستجو برای: chironomid abundance

تعداد نتایج: 81236  

Arezoo Azimi Mohammad Sudagar Rasool Maleknejad,

In this study, the effect of diet food (soybeans, egg yolk and chicken manure) on biomass weight and body composition (the amount of protein, fat, moisture and ash) Chironomid larvae were examined. For this purpose, 2.5 grams of food per Coconut considered in the period, with three replicates and Chironomid larvae during the period of 15 days in plastic pans were kept in nutrition. The results ...

Arezoo Azimi Mohammad Sudagar Rasool Maleknejad, Samira Shokrollahi

Objective: In this study, the effect of diet food (soybeans, egg yolk and chicken manure) on biomass weight and body composition (the amount of protein, fat, moisture and ash) Chironomid larvae were examined. Methods: For this purpose, 2.5 grams of food per Coconut considered in the period, with three replicates and Chironomid larvae during the period of 15 days in plastic pans were kept in nut...

2015
Ninel A. Petrova Richard Cornette Sachiko Shimura Oleg A. Gusev Dylo Pemba Takahiro Kikawada Sergey V. Zhirov Takashi Okuda

The African chironomid Polypedilumvanderplanki Hinton, 1951 is the only chironomid able to withstand almost complete desiccation in an ametabolic state known as anhydrobiosis. The karyotypes of two allopatric populations of this anhydrobiotic chironomid, one from Nigeria and another from Malawi, were described according to the polytene giant chromosomes. The karyotype from the Nigerian populati...

Journal: :Environmental toxicology and chemistry 2003
Mark D Fowlkes Jerry L Michael Thomas L Crisman Joseph P Prenger

Increased herbicide use in silviculture over the last several decades has led to concern over potential water contamination, which may affect biotic health. In the southeastern United States, pine flatwoods are important for timber production and are often interspersed with cypress wetlands. Cypress domes are isolated, shallow basins that collect surficial waters from adjacent forested areas an...

2013
Anne-Sophie Deville David Grémillet Michel Gauthier-Clerc Matthieu Guillemain Friederike Von Houwald Bruno Gardelli Arnaud Béchet

Accurate knowledge of the functional response of predators to prey density is essential for understanding food web dynamics, to parameterize mechanistic models of animal responses to environmental change, and for designing appropriate conservation measures. Greater flamingos (Phoenicopterus roseus), a flagship species of Mediterranean wetlands, primarily feed on Artemias (Artemia spp.) in comme...

2010
Dubravka Čerba Zlatko Mihaljević Jasna Vidaković

This study investigates a phytophylous community of Chironomidae larvae on the submerged plant species Myriophyllum spicatum L. in a eutrophic lake (Lake Sakadaš, Danube floodplain area in Croatia) during summer 2004. This macrophyte species appeared for the first time in the lake in 2004, lasted approximately three months and was considered as a temporary habitat. The chironomid community was ...

Journal: :Environmental toxicology and chemistry 2005
Vincent Pettigrove Ary Hoffmann

High-molecular weight (> C16) hydrocarbons (HMWHs) are common pollutants in sediments of freshwater systems, particularly urban water bodies. No sediment quality guidelines exist for total hydrocarbons; more emphasis is placed on polyaromatic hydrocarbons, the most toxic component of hydrocarbons. A field-based microcosm experiment was conducted to determine whether unpolluted sediments spiked ...

2016
Jarosław Kobak Małgorzata Poznańska Łukasz Jermacz Tomasz Kakareko Daniel Prądzynski Małgorzata Łodygowska Karolina Montowska Karolina Bącela-Spychalska

Aggregations of the Ponto-Caspian invasive zebra mussel (Dreissena polymorpha) constitute a suitable habitat for macroinvertebrates, considerably increasing their abundance and providing effective antipredator protection. Thus, the overall effect of a mussel bed on particular predator species may vary from positive to negative, depending on both prey density increase and predator ability to pre...

2017
Petra Kranzfelder Torbjørn Ekrem Elisabeth Stur

Chironomidae (Diptera) pupal exuviae samples are commonly used for biological monitoring of aquatic habitats. DNA barcoding has proved useful for species identification of chironomid life stages containing cellular tissue, but the barcoding success of chironomid pupal exuviae is unknown. We assessed whether standard DNA barcoding could be efficiently used for species identification of chironomi...

2014
John Gichimu Mbaka Celia Somlai Denis Köpfer Andreas Maeck Andreas Lorke Ralf B. Schäfer

Methane gas (CH4) has been identified as an important alternative source of carbon and energy in some freshwater food webs. CH4 is oxidized by methane oxidizing bacteria (MOB), and subsequently utilized by chironomid larvae, which may exhibit low δ(13)C values. This has been shown for chironomid larvae collected from lakes, streams and backwater pools. However, the relationship between CH4 conc...

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