Academic literature on the topic 'Daphnia hyalina'

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Journal articles on the topic "Daphnia hyalina"

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Brzeziński, Tomasz, Jan Fronk, Joanna Trzcińska-Danielewicz, and Piotr Dawidowicz. "Interspecific hybridization in sympatric species of Daphnia inhabiting lakes in northeastern Poland." Oceanological and Hydrobiological Studies 41, no. 2 (January 1, 2012): 1–6. http://dx.doi.org/10.2478/s13545-012-0011-5.

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AbstractPopulations of three sympatric species (Daphnia cucullata, Daphnia galeata, and Daphnia hyalina (Daphnia longispina complex)) inhabiting three lakes in northeastern Poland (Roś, Mikołajskie, Wigry) were checked for interspecific hybrids. Hybrid Daphnia coexisting with parental individuals were detected in each of the investigated lakes. Several classes of hybrids (F1, F2, backcrosses), including D. cucullata×galeata×hyalina individuals, have been detected. Hybrids constituted a substantial (13%–38%) part of the total abundance of individuals of the D. longispina complex. Deficiency of heterozygotes (hybrids) detected may indicate the existence of barriers for gene flow between the sympatric Daphnia taxa.
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Luning-Krizan, Julia. "Neck-teeth induction in Daphnia hyalina under natural and laboratory conditions." Fundamental and Applied Limnology 140, no. 3 (November 10, 1997): 367–72. http://dx.doi.org/10.1127/archiv-hydrobiol/140/1997/367.

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Keller, Barbara, Justyna Wolinska, Marina Manca, and Piet Spaak. "Spatial, environmental and anthropogenic effects on the taxon composition of hybridizing Daphnia." Philosophical Transactions of the Royal Society B: Biological Sciences 363, no. 1505 (June 2, 2008): 2943–52. http://dx.doi.org/10.1098/rstb.2008.0044.

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The competitive ability of hybrids, compared with their parental taxa, can cover a wide fitness range from poor to superior. For example communities of the Daphnia galeata – hyalina – cucullata species complex often show hybrid dominance. We tested whether taxa composition of 43 European lakes inhabited by this species complex can be explained by habitat characteristics (e.g. size descriptors, trophy level) or geography. We found that D. galeata occurs more frequently south of the Alps, whereas D. hyalina and D. cucullata are found more in the north. Lakes with D. galeata dominance had higher temperatures whereas D. hyalina dominance could be attributed to low phosphorus loads. The dominance of F 1 -hybrids, however, was not explainable with current environmental variables. In a subset of 28 lakes, we studied the impact of eutrophication history on F 1 -hybrid success. Lakes with the highest trophic state in the past tended to be dominated by F 1 -hybrids. Our data demonstrate that human-mediated habitat disturbance (eutrophication) has facilitated hybrid success and altered the Daphnia taxon composition across lakes. At the same time, specific habitat conditions might provide a refuge from hybridization for native genotypes.
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Davies, J. "Evidence for a diurnal horizontal migration in Daphnia hyalina lacustris Sars." Hydrobiologia 120, no. 2 (January 1985): 103–5. http://dx.doi.org/10.1007/bf00032130.

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Petrusek, Adam, Jaromír Seda, Jiří Macháček, Štěpánka Ruthová, and Petr Šmilauer. "Daphnia hybridization along ecological gradients in pelagic environments: the potential for the presence of hybrid zones in plankton." Philosophical Transactions of the Royal Society B: Biological Sciences 363, no. 1505 (June 2, 2008): 2931–41. http://dx.doi.org/10.1098/rstb.2008.0026.

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The relative homogeneity of pelagic environments has been regarded as the reason for the absence of hybrid zones for hybridizing planktonic Daphnia (Crustacea: Cladocera); occasional dominance of interspecific hybrids over parental species was explained by their temporal superiority in fluctuating environments. However, water bodies with spatially varying environmental conditions might facilitate the formation of hybrid zones in plankton. We studied the distribution of species and hybrids of the Daphnia longispina complex in 11 canyon-shaped reservoirs, localities characterized by horizontal environmental gradients (particularly of food supply and size-selective predation); we also analysed patterns of carapace size and fecundity among coexisting taxa. Spatial distribution of taxa agreed with their ecological characteristics; those showing different affinities along longitudinal reservoir profiles differed in size according to the presumed fish predation gradient. Only hybrids of Daphnia galeata with Daphnia cucullata and D. longispina (= hyalina ) were recorded. The latter two species preferred opposite ends of gradients, such spatial segregation probably explaining the absence of their hybrids. Distributional patterns were relatively stable in two consecutive summers, apart from a substantial decline of D. galeata × cucullata in the second year. The observed pattern of a hybrid-dominated zone in intermediate conditions suggests that local Daphnia hybrid zones may indeed form within reservoirs.
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Lammens, Eddy H. R. R., Henrik W. de Nie, Jacobus Vijverberg, and Wim L. T. van Densen. "Resource Partitioning and Niche Shifts of Bream (Abramis brama) and Eel (Anguilla anguilla) Mediated by Predation of Smelt (Osmerus eperlanus) on Daphnia hyalina." Canadian Journal of Fisheries and Aquatic Sciences 42, no. 8 (August 1, 1985): 1342–51. http://dx.doi.org/10.1139/f85-169.

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The resource partitioning of the bream (Abramis brama) and eel (Anguilla anguilla) populations in Lake Tjeukemeer, The Netherlands, was related to the variation in abundance of their most important food organisms, Daphnia hyalina and larval chironomids. Niche shifts of both bream and eel populations were related to the abundance of young planktivorous fish, particularly smelt (Osmerus eperlanus). When these fish were abundant the D. hyalina population was dominated by small individuals and bream switched from a planktivorous to a benthivorous diet, the condition of mature bream deteriorated, and its gonads developed poorly. Under these circumstances the eel population switched from a diet of chironomid pupae and molluscs to one of predominantly fish. The condition of eels smaller than 35 cm decreased and the chironomid population decreased in numbers and biomass. Conversely, when the recruitment of planktivorous fish was poor, the size of D. hyalina was large and diets and conditions of bream and eel populations changed again. Because of the hydrological regime the stock of the young planktivorous fish is determined to a great extent by the immigration of allochthonous larval smelt and varies markedly, but the biomass of the bream and eel populations is comparatively stable.
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Manca, Marina, and Anna Galli Tognota. "Seasonal changes in morphology and size of Daphnia hyalina Leydig in Lago Maggiore." Hydrobiologia 264, no. 3 (July 1993): 159–67. http://dx.doi.org/10.1007/bf00007286.

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Ringelberg, J. "A mechanism of predator-mediated induction of diel vertical migration in Daphnia hyalina." Journal of Plankton Research 13, no. 1 (1991): 83–89. http://dx.doi.org/10.1093/plankt/13.1.83.

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Lüning, Julia, and Herwig Stibor. "Indirect effects of size-selective predation on the life-history of Daphnia hyalina." SIL Proceedings, 1922-2010 25, no. 4 (October 1994): 2395. http://dx.doi.org/10.1080/03680770.1992.11900650.

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Ringelberg, J. "The relation between ultimate and proximate aspects of diel vertical migration in Daphnia hyalina." SIL Proceedings, 1922-2010 24, no. 5 (December 1991): 2804–7. http://dx.doi.org/10.1080/03680770.1989.11899166.

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Dissertations / Theses on the topic "Daphnia hyalina"

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Steiner, Silke. "Dynamik und Energietransfer einer planktischen Crustaceengemeinschaft in Abhängigkeit von der Nahrungsgrundlage und den Planktivoren." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2002. http://nbn-resolving.de/urn:nbn:de:swb:14-1037260722693-36033.

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Ziel der Arbeit war es, die Hypothese von CARNEY & ELSER (1990), dass unter mesotrophen Bedingungen die trophische Transfereffizienz vom Phytoplankton zum Crustaceenplankton maximal ist, in einem Ganz-Seen-Experiment zu überprüfen. Die Untersuchungen erfolgten im Rahmen des Projektes "Top-Down-Steuerung planktischer Biozönosen" am mesotrophen Großen Vätersee (Brandenburg). Die Fragen, welchen Einfluß das Crustaceenplankton auf die Primärproduzenten ausübt, wie die Primärproduzenten auf den Grazingdruck reagieren, und welche Verhaltensweisen der Crustaceen die Kopplungsstärke zu den Primärproduzenten oder den Prädatoren kausal beeinflussen, standen im Mittelpunkt. Primärproduktion (PPR) und Crustaceengrazing wurden in situ gemessen, Crustaceen-biomassen, -produktion und -verteilung bestimmt und mit den Daten der angrenzenden Teilprojekte in Beziehung gesetzt. Der prozentuale Anteil des Nanoplanktons an der absoluten PPR erreichte im Durchschnitt 52 %. Die Chl a spezifische PPR dieser Fraktion war signifikant positiv korreliert mit den effektiven Filtrierraten der Daphnien. Die spezifische PPR von Pico- und Netzphytoplankton blieb von den effektiven Filtrierraten unbeeinflusst. Die Blaualgen, Hauptbestandteil des Picoplanktons, stellten eine schlechte Nahrungsquelle für Daphnien dar. Dies zeigten Laborversuche zur Nahrungsqualität. Durch den hohen Beitrag des Nanoplanktons an der PPR bestand zwischen den Primärproduzenten und den Crustaceen eine starke Kopplung. 1998 betrug die Konsumtions-Transfereffizienz von den Primärproduzenten zu den Crustaceen 25 %. Im Vergleich dazu war der Anteil der Planktivorenkonsumtion an der Produktion der Crustaceen mit 14 % deutlich geringer. Die Konsumtion erklärte im Frühsommer während der hohen Verluste der Daphnien maximal 20 % der Mortalität. Kam es im Hochsommer zu höheren Abundanzen invertebrater Räuber, war deren Prädationsdruck hoch genug, die Daphnienpopulation auf niedrigem Niveau zu halten. Somit war der Top-down-Druck der Planktivoren auf die Daphnien sehr gering. Eine Nahrungskettensteuerung durch Besatz mit Piscivoren würde keine Verminderung der Mortalität der Crustaceen zur Folge haben, sondern eher den Fraßdruck auf Cladoceren durch erhöhte Abundanzen der invertebraten Räuber verstärken.
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Book chapters on the topic "Daphnia hyalina"

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Spaak, Piet, and Barbara Keller. "Diapause and its Consequences in the Daphnia galeata – cucullata – hyalina Species Complex." In Diapause in Aquatic Invertebrates Theory and Human Use, 177–85. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-5680-2_11.

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Reede, Tineke, and Joop Ringelberg. "The influence of a fish exudate on two clones of the hybrid Daphnia galeata × hyalina." In Cladocera as Model Organisms in Biology, 207–12. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0021-2_24.

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Caramujo, Maria-José, M. Cristina Crispim, and Maria-José Boavida. "Assessment of the importance of fish predation versus copepod predation on life history traits of Daphnia hyalina." In Cladocera: the Biology of Model Organisms, 243–52. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-4964-8_27.

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Gool, E. Van, and J. Ringelberg. "Swimming of Daphnia Galeata × Hyalina in Response to Changing Light Intensities: Influence of Food Availability and Predator." In Zooplankton: sensory ecology and physiology, 399–405. London: Routledge, 2021. http://dx.doi.org/10.1201/9780203733615-30.

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Wolf, Hans Georg. "Interspecific hybridization between Daphnia hyalina, D. galeata, and D. cucullata and seasonal abundances of these species and their hybrids." In Cladocera, 213–17. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-4039-0_24.

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