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 11 of 11 for “"Sand substrate"”.
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Ecological studies of benthic macroinvertebrates for determining sedimentation impacts in Chattahoochee National Forest streams
… River watershed revealed that patchy, coarse sands may be the primary issue of concern regarding sedimentation impact to benthic macroinvertebrates. Therefore, a modified sampling approach was used to investigate relationships of macroinvertebrates and environmental conditions that included …
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SCAPHIRHYNCHUS STURGEON EARLY-LIFE HISTORY
… ~0.1), moderate depths (i.e., 2 to 5 m), and sand substrate. Although determination of river of origin and specific habitats used are imperative for restoration, sturgeon populations are likely regulated by factors within habitats that affect early-life dynamics. Mean sturgeon growth rates …
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Qualidade fisiológica de sementes de algodoeiro e comportamento in vitro de Sclerotinia sclerotiorum (Lib.) De Bary, submetido a diferentes temperaturas
… and the evaluation of emergency, using sterile sand substrate. The emergency, speed index of emergency, shoot length and root system, the content of motherland dry shoot and root system. Were evaluated. The experimental design was completely randomized and means were compared by Tukey test. …
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Modeling Spatial Distribution and Habitat Associations for Juvenile Pallid Sturgeon (Scaphirhynchus albus) in the Missouri River
… directional variation in bottom flow, percent sand substrate composition, bottom slope, and ephemeropteran and larval dipteran abundance were created for eight 3.2-km river segments using 20 m grid cell resolution. Pallid sturgeon capture and non-capture areas were then overlain onto physical …
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Larval fish abundance and habitat associations in backwaters and main channel borders of the Kanawha River
… by the dropbox included open water over silt substrate, open water over a sand substrate, and emergent vegetation. <i>Lepomis</i> species, emerald shiners (<i>Notropis atherinoides</i>), and gizzard shad (<i>Dorosoma cepedianum</i>) were the dominant taxa. The emerald shiner taxa could also …
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A System-Level Analysis of Migratory Shorebird Habitat Use, Diet, and the Influence of Climate-Driven Ecosystem Change in the Virginia Barrier Islands
… as dunlin (Calidris alpina) and semipalmated sandpipers (Calidris pusilla). The goals of my thesis were: 1) to advance understanding of the foraging ecology of these imperiled shorebird species in the understudied mudflat habitats of the coastal lagoon behind the barrier islands, and 2) to …
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Investigating the foraging ecology of black guillemots Cepphus grylle in relation to tidal stream turbines and marine protected areas
… kelp-dominated habitats, and habitats related to sand substrate with dense infaunal<br/>3<br/>communities (20m). Use of these niches was dependent on colony specific availability, and surrounding depth profiles. Within these niches, individuals partitioned their foraging locations, and exhibited …
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Manganese oxide deposits in water treatment facilities, North East Scotland.
… robust and could not be easily removed from the sand substrate they uniformly encapsulated within sand filtration beds. The oxides were amorphous with a stoichiometry close to MnO2, with very little variance in stoichiometry found within filter beds and between treatment facilities. The mass of …
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Biology, Captive Propagation, and Feasibility of Pearl Culture in the Pink Heelsplitter (Potamilus Alatus) (Say, 1817) (Bivalvia: Unionidae)
… oculata and Neochloris oleoabundans) and substrate type (fine sediment and sand). Overall, survival of juveniles after 17 d ranged from 23.8 to 66.8 %, with mean of 48.5 %; however, survival dramatically declined during the next 2 wk period to only 5.8 % (range of 1.8 to 7.8 %). Survival …
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Local and Systemic Controls on Fish and Fish Habitat in South Dakota Rivers and Streams: Implications for Management
… dimensions, stream bank and riparian traits, substrate, and fish community attributes were compared between the Bad River in a semi-arid region of western South Dakota and the Big Sioux River in the sub-humid region in eastern South Dakota. Findings suggest that along the Big Sioux River, the …
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Behavioural interactions between the large pine weevil, Hylobius abietis L.(Coleoptera: Curculionidae), and entomopathogenic nematodes
… H. abietis react to the presence of EPN, one thousand nematodes were applied to the head region of adult weevils and grooming responses were recorded (Chapter 3). Insects that had Steinernema carpocapsae applied on average groomed for significantly longer (44.16 seconds), than those that had …