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  • 1
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4774 | 1256 | 2011-09-29 15:55:47 | 4774 | Freshwater Biological Association
    Publication Date: 2021-07-06
    Description: Megacyclops viridis Jurine, noticed in Lago Maggiore in 1912 by De Marchi from the littoral vegetation of Pallanza, is a normal member of the littoral plankton of the lake. The subgenus Megacyclops, created by Kiefer in his revision of the viridis-vernalis group, contains european and american species some of which are today considered as varieties of the species viridis. This paper examines morphology and of the distribution of the Italian viridis in Lake Maggiore.
    Description: Translated from Italian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater lakes ; Freshwater crustaceans ; Animal morphology ; Life cycle ; Ecological distribution ; Italy ; Lake Maggiore ; Megacyclops viridis
    Repository Name: AquaDocs
    Type: monograph
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  • 2
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4762 | 1256 | 2011-09-29 15:55:00 | 4762 | Freshwater Biological Association
    Publication Date: 2021-07-06
    Description: The present work appertains to a series of investigations in the field of trophodynamics of water bodies conducted by the department of hydrobiology ”Mosrybvtuza” under the leadership of Prof. Director N.S. Gaevska. Usually with quantitative collections of benthos ostracoda are hardly taken account of. But with the employment of special methods it is possible to be convinced that they are encountered in massive numbers. The role of ostracods in the nutrition of fish is recognised as important by many authors. On the question of the feeding of ostracods, in the literature there are only the fragmentary indications about the occurrence in the gut of ostracods of algae (diatoms, desmids) and detritus. The study of the feeding of ostracods was conducted both by the method of dissecting the guts of ostracods taken from natural waters, and by the method of feeding ostracods under laboratory conditions with a variety of food objects. Moreover, with a view to revision of obtained quantitative data, for determination of food requirements of ostracods the respiration method was applied.
    Description: Translated from Russian into English
    Keywords: Ecology ; Limnology ; Freshwater crustaceans ; Trophodynamic cycle ; Feeding behaviour ; Feeding ; Food composition ; Experimental research ; Algae ; Oxygen consumption
    Repository Name: AquaDocs
    Type: monograph
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  • 3
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4773 | 1256 | 2011-09-29 15:55:44 | 4773 | Freshwater Biological Association
    Publication Date: 2021-07-06
    Description: The method of E.V. Borutski was used for determining the production of chironomids, that is, the dynamics of the number and biomass of the larvae were analysed, their death, a calculation of emergence and the number of deposited egg layings was carried out. In addition to the method of Borutski, the authors also calculated the seasonal dynamics of the number of larvae of the younger age stages in the microbenthos.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater lakes ; Freshwater ecology ; Biomass ; Population dynamics ; Invertebrate larvae ; Russia ; Chironomidae
    Repository Name: AquaDocs
    Type: monograph
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  • 4
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4764 | 1256 | 2011-09-29 15:55:08 | 4764 | Freshwater Biological Association
    Publication Date: 2021-07-06
    Description: The author summarises observations on the behaviour of Polyphemus pediculus and functions of its extremities in the process of feeding. The crustacean Polyphemus pediculus seizes its prey, kills it and pulverises its food with the help of its extremities. Therefore for a study of its feeding method was necessary not only to have been acquainted in detail with the structure of its extremities, but also to have observed their interaction for the accomplishment of the stated functions.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Animal morphology ; Animal physiology ; Feeding behaviour
    Repository Name: AquaDocs
    Type: monograph
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  • 5
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4769 | 1256 | 2011-09-29 15:55:28 | 4769 | Freshwater Biological Association
    Publication Date: 2021-07-06
    Description: Aegagropila sauteri is a peculiar green algae, the branched thalli of which, according to the amount of growth, forms velvety spheres of a diameter of 3-4, sometimes to 5-6 cm. and bigger. Investigators attribute it to a special genus of green algae. The authors examine Aegagropila sauteri in Lake Markakol (Kazakhstan).
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Algae ; Freshwater lakes ; Freshwater ecology ; Kazakhstan ; Aegagropila sauteri
    Repository Name: AquaDocs
    Type: monograph
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  • 6
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4770 | 1256 | 2011-09-29 15:55:29 | 4770 | Freshwater Biological Association
    Publication Date: 2021-07-06
    Description: This abstract summarises the 1953-1955 surveys of the distribution of benthos in the Rybinsk Reservoirs. It includes the mean biomass of benthos.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Algae ; Freshwater lakes ; Freshwater ecology ; Phytobenthos ; Biomass ; Russia
    Repository Name: AquaDocs
    Type: monograph
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  • 7
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4768 | 1256 | 2011-09-29 15:55:26 | 4768 | Freshwater Biological Association
    Publication Date: 2021-07-06
    Description: Results of the investigation on certain problems of the nutrition of Leptodora and Bythotrephes in Rybinsk Reservoir (Russia) are reviewed. To clarify the composition of the food of Leptodora and Bythotrephes in this period, experiments were provided on their nutrition by cyclopids and rotifers.
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Animal organs ; Predation ; Feeding behaviour ; Freshwater ecology ; Russia
    Repository Name: AquaDocs
    Type: monograph
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  • 8
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4763 | 1256 | 2011-09-29 15:55:07 | 4763 | Freshwater Biological Association
    Publication Date: 2021-07-06
    Description: This brief chapter describes the occurrence Macrocyclops distinctus in the littoral zone of the Rybinsk Reservoir. Sampling was undertaken in summer and autumn 1961. In order to facilitate distinction of M. distinctus and Macrocyclops fuscus the author presents drawings of the whole species and certain characteristic parts of the body, and also gives a description of M. distinctus, comparing it with M. fuscus.
    Description: Translated from Russian into English
    Keywords: Ecology ; Limnology ; Freshwater crustaceans ; Animal morphology ; Freshwater ecology ; Taxonomy
    Repository Name: AquaDocs
    Type: monograph
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  • 9
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4777 | 1256 | 2011-09-29 15:55:56 | 4777 | Freshwater Biological Association
    Publication Date: 2021-07-06
    Description: Viruses, which are characterised by a relative simplicity of chemical composition, are involved with all the groups of the animal and plant world. The discovery of viruses of lower organisms has special interest. Along with the already known viruses lysing bacteria and actinomycetes, viruses have been discovered in recent years which lyse algae. During investigations of water from water-bloom patches and of mud taken from zones of massive accumulation of blue-green algae in the Dneprovsk reservoirs, the authors obtained viruses lysing algae. The revealing of viruses producing lysis of blue-green algae, which one could use in the control of water-blooms, has the greatest interest. With this aim, samples of water were collected from various zones of water-bloom patches in the Kremenchug, Dneprovsk and Kukhov reservoirs. For viruses lysing algae we propose the name 'algophages'. Along with the existence of viruses of algae of the phage type, one cannot deny the possibility of the existence of viruses of another type, multiplying in the cells of algae and causing their virus illnesses.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater lakes ; Algal blooms ; Algae ; Cytology ; Viruses ; Microcystis aeruginosa ; Cyanobacteria ; Dnieper
    Repository Name: AquaDocs
    Type: monograph
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  • 10
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    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4771 | 1256 | 2011-09-29 15:55:39 | 4771 | Freshwater Biological Association
    Publication Date: 2021-07-06
    Description: Many have observed the reduction of the quantity of zooplankton in the presence of water blooms. It is known that in seas zooplankton as it were avoids places of accumulation of blue-green algae. By observations on one of the tributaries of the Rybinsk reservoir - the River Shumorovka - the authors tried by simultaneous collections to trace the changes in numbers, not only of zoo- and phytoplankton but also of bacteria. The plankton was collected by quantitative nets with suitable numbers of gauze and bacteria were taken account of by the method of direct calculation on membrane filters. It can be seen that the development of blue-green algae appears as an important factor, determining not only the intensity but also the direction of the process of production of zooplankton.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Algae ; Freshwater lakes ; Freshwater ecology ; Zooplankton ; Algal blooms ; Cyanobacteria ; Russia
    Repository Name: AquaDocs
    Type: monograph
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