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Andrei V. Panteleev and Anna A. Kolessa
A new hybrid metaheuristic method for optimizing the objective function on a parallelepiped set of admissible solutions is proposed. It mimics the behavior of a school of river perch when looking for food. The algorithm uses the ideas of several methods:...
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Iwona Golas, Mariusz Szmyt and Katarzyna Glinska-Lewczuk
Human activities influence the presence of potentially pathogenic bacteria in indoor air. The aim of this study was to determine the effect of the experimental rearing of European grayling and European perch in a recirculating aquaculture system on the c...
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James E. Landmeyer, W. Scott McBride and William B. Tate
The Okaloosa darter (Etheostoma okaloosae) is a diminutive, perch-like, benthic fish that inhabits only six small, clear, and shallow creek systems that flow almost entirely within Eglin Air Force Base in the panhandle of northwest Florida. Listed as End...
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Daniel Feliu-Talegon, José Ángel Acosta, Alejandro Suarez and Anibal Ollero
Nature exhibits many examples of birds, insects and flying mammals with flapping wings and limbs offering some functionalities. Although in robotics, there are some examples of flying robots with wings, it has not been yet a goal to add to them some mani...
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Kim de Mutsert, Amanda Sills, C. J. Carroll Schlick, R. Christian Jones
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After a local wastewater treatment plant significantly reduced phosphorus loading into a phytoplankton-dominated tributary of the Potomac River in the early 1980s, water quality and biological communities were monitored bi-weekly from April to September....
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Norman A. Graham, Steven G. Pueppke, Talgat Uderbayev
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Central Asia?s arid lowland ecosystems are dependent on water that originates in nearby mountains and is carried by rivers to terminal lakes and freshwater seas with no outlets to the ocean. Fish traditionally thrived in these waterways, but they have be...
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Lauri Arvola, Martti Rask, Martin Forsius, Pasi Ala-Opas, Jorma Keskitalo, Katja Kulo, Mika Kurkilahti, Anja Lehtovaara, Samuli Sairanen, Simo Salo, Tuomo Saloranta, Matti Verta, Sami Vesala
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In order to simulate food web responses of small boreal lakes to changes in thermal stratification due to global warming, a 4 year whole-lake manipulation experiment was performed. Within that time, period lake mixing was intensified artificially during ...
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Juris Aigars, Natalija Suhareva and Rita Poikane
The polybrominated diphenyl ethers (PBDEs) are bioaccumulative, persistent, and toxic. They have a high risk of emission into the environment via volatile losses and diffuse sources, such as commercial product disposal or the use of sewage sludge. The PB...
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Tom Robin Olk, Tobias Karlsson, Espen Lydersen and Asle Økelsrud
This study is based on monthly sampling of fish from grates mounted at an industrial water intake, located at a depth of 50 m in Lake Norsjø (Southern Norway) during the year 2014, to investigate seasonal variations in the use of the profundal habitat an...
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