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Showing 1 to 9 of 9 for “"Daphnia galeata"”.
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Bottom-up gesteuerte Anpassungen von Daphnia galeata an die Nahrungsbedingungen in der biomanipulierten Talsperre Bautzen
… Analyse der Nahrungsbedingungen von D. galeata unter Berücksichtigung der damit verbundenen Strategien der Daphnien zur Optimierung des Nahrungserwerbs, um den Einfluß dieser Faktoren bezüglich des Auftretens einer Sommerdepression der Daphnien zu beurteilen. Aufbauend auf den bereits …
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Food Selectivity of Bigmouth Buffalo (Ictiobus cyprinellus, Valenciennes) in Lake Poinsett, South Dakota
… subadults and adults fed entirely on plankton. Daphnia pulex adults comprised 83.7 to 96.7% of the food items during periods of ice cover (January to April). Daphnia pulex adults and juveniles comprised 68.5% by volume and cyclopoid copepods 29.7%^ of the diet from April to July. Summer (July to …
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Food Habits of Fish In A Multispecies Farm Pond
… were fed upon regardless of their availability. Daphnia galeata was positively selected while Bosmina longirostris and both cyclopoid and calanoid copepods were selected against by all three species of fish. With the exception of Daphnia parvula, which was positively selected by adult black …
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Nahrungsnetzbewirtschaftung in Mittelgebirgstalsperren
… The underlying switch in the size shift from Daphnia cucullata to Daphnia galeata (Bever-Reservoir, Wupper-R, Lingese-R), or only in increasing individual body sizes of the Daphnia galeata population (Vorsperre Große Dhünn), occurred suddenly but only some years after the changes in fishery …
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Bildung funktioneller Typgruppen des Phytoplanktons: Integration von Modell-, Freiland - und Laborarbeiten
… Wachstumsversuchen und Fraßversuchen mit Daphnia galeata × hyalina genauer untersucht. Als stellvertretende Art für diese Typgruppe wurde Sphaerocystis schroeteri gewählt. Die Wachstumsversuche bei 20 °C kennzeichneten Sphaerocystis als Starklichtart mit einer relativ hohen Wachstumsrate …
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Influence of Rainbow Smelt Predation on Zooplankton Community Composition in Lake Oahe, South Dakota
… larvae and pupae. Adult rainbow smelt selected Daphnia pulex over other prey at all sampling stations. Other species positively selected for were Daphnia galeata mendotae and Leptodora kindtii. Rainbow smelt prey were significantly larger than mean size of zooplankton in the environment. …
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Responses of zooplankton to variation in elemental composition of algae: Regulation at individual and ecosystem levels
… and adaptations of zooplankton, and especially Daphnia, when faced with food sources that are deficient in essential elements. First, we have modelled the constraints of feeding, digestion and growth in Daphnia. We have hypothesized that Daphnia possesses the intrinsic ability to initiate …
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Population dynamics of Daphnia galeatat in the biomanipulated Bautzen Reservoir: life history strategies against food deficiency and predation
The population dynamics and demography of Daphnia galeata was analysed in a five year study in the biomanipulated Bautzen Reservoir. Samples were taken two times a week during the period May-July in the pelagic zone of this highly eutrophic water. Major bottom-up and top-down factors were …