Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"limnetic"”.
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The effects of headwater reservoirs and channelization on invertebrate drift in Piedmont streams
… of the influx of large numbers of organisms of limnetic origin. The density of these organisms in the drift decreased rapidly as the distance downstream from the reservoir increased.
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Food Selectivity of the Black Bullhead (Ictalurus melas, Rafinesque) in Lake Poinsett, South Dakota
… (37-87 mm total length) fed primarily on limnetic cladocerans and copepods. Leptodora and Diaphanosoma comprised 86.5% of the total food volume. Chironomid larvae and pupae made up 5.6% of the total. Other benthic organisms and littoral cladocerans together contributed less than 1%. …
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The individual and collective behavior of social organisms across environments
… population divergence between the benthic and limnetic ecotypes, which differ significantly in their ecology. I found that benthic fish were bolder, more active, and had deeper bodies than limnetic fish. Group cohesiveness, social interaction rates, and social networks did not differ among …
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Depositional Environments of the Miocene Esmeralda Formation, Stewart Basin, Stewart Valley, Nevada
… time intervals during the Miocene. In time A, limnetic and littoral environments and debris-flows existed. Lahars then covered previous sediments. During time C meandering and braided fluvial systems reworked the lahars and a paludal environment formed. A second limnetic environment then formed …
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Modelling of environmental parameters in lake environmnets using neural networks
… of the major problems that are observed in the limnetic environments. The eutrophic water is related with a series of environmental problems like anoxia, the existence of harmful cyanotoxins etc. Therefore, this study is focused on the assessment of the environmental parameters that are related …
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A Comparison of Adult and Sub-Adult Walleye Movements and Distribution in Lakes Having Simple and Complex Morphometry
… (P<0.05) differences between littoral and limnetic gill net catch rates were identified during the spring at Lake Kampeska for walleyes Stizostedion vitreum, yellow perch Perea flavescens , and white suckers Catostomus commersoni. At Lake Enemy Swim, significant differences between littoral …
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A study on the water chemistry and plankton in blackwater lakelets of the south-western Cape
… = 1783), a low species richness, an absence of limnetic cladocerans, and high species diversity (H') and evenness (J') indices. The community appeared to be limited by the low pH and the pH-dependent humic toxicity of the water. The communities in Gillidam, Grootrondevlei and Grootwitvlei were …
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Trophic interactions between larval gizzard shad and resident zooplanktivores in Claytor Lake, Virginia
… spp. or adult alewife. All species of limnetic larvae examined showed feeding preferences for Diaphanosoma and copepod nauplii. Crustacean zooplankton densities did not respond negatively to peak larval fish abundances, and never dropped below 250-400 organisms/L. In Claytor Lake, the …
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Causes and consequences of patchy spatial distribution in male and female fairy shrimp, Eubranchipus bundyi
… it has been for understanding the ecology of the limnetic zone of lakes (Hutchinson 1967, Wetzel 1983, Wetzel and Likens 1991).
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A test of the variable nature of density-dependent mortality in fish populations
… went hungry when fry of both species were limnetic. Mortality of young perch proved depensatory and that of young walleye density-independent. Mortality of walleye fry was inversely influenced by abundance of young perch. High levels of turbidity greatly enhanced fry survival for both …
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Dynamics and Drivers: Carbon fluxes from temperate freshwater reservoirs
… reservoirs, dependent upon the littoral or limnetic habitats investigated. Most significantly, efflux was correlated with increased phosphorous concentrations within the system (CH4 and CO2), pH (CO2) and the occurrence of physical ebullition events (CH4), all of which were accentuated by …
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Trophic ecology of an introduced, land-locked alewife (Alosa pseudoharengus) population and assessment of alewife impact on resident sportfish and crustacean zooplankton communities in Claytor Lake, Virginia
… to alternative prey and competition among limnetic and littoral-inhabiting piscivores presumably increased. Although alewife were shown to possess several negative traits for a forage fish, no forage species has proven ideal for southeastern reservoirs. Alewife introduction should be …
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Studi keanekaragaman zooplankton sebagai bioindikator kualitas perairan di Ranu Pani dan Ranu Regulo Taman Nasional Bromo Tengger Semeru
… and Ranu Regulo TN.BTS. The sampling is done on limnetic zone in 5 (five) observation stations. As much as 25 ml water sample obtained using formalin preserved with 4% as much as 3-5 drops. Chemical physics observed factors include, temperature, pH, brightness, TDS, TSS, DO, BOD, COD, phosphate …
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Studi kelimpahan dan keanekaragaman fitoplankton di perairan Ranu Pani dan Ranu Regulo Taman Nasional Bromo Tengger Semeru
… and Ranu Regulo TN.BTS. The sampling is done on limnetic zone at 5 observation stations. Water samples are filtered by 25 ml formalin and preserved use 4% as much as 5 drops and as many as 4 drops of CuSO4 added. Physical and chemical factors had observed are the temperature, TDS, TSS, …
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Stable isotopic insight into pelagic carbon cycling in Loch Lomond: a large, temperate latitude lake.
… the magnitude of fluxes of carbon through these limnetic systems is important if their contribution to ecosystem / global carbon dynamics is to be elucidated. In this research two separate field campaigns were undertaken with the goal of understanding if, and exactly how significant secondary …