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  • Freshwater crustaceans  (65)
  • Freshwater fish  (65)
  • Chemistry  (39)
  • Organic Chemistry
  • Freshwater Biological Association  (164)
  • 1
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    Megacylops viridis Jurine, abyssal form in Lake Maggiore. [Translation of: Memorie dell'Istituto Italiano di Idrobiologia Dott.Marco de Marchi 17 57-79, 1964] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4774 | 1256 | 2011-09-29 15:55:47 | 4774 | Freshwater Biological Association
    Details
    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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    The temperature dependence of the development of the embryo in Mesocyclops leuckarti (Claus) and Cyclops scutifer (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4772 | 1256 | 2011-09-29 15:55:41 | 4772 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: This work is mainly intended as an addition to the studies of the populations dynamics of Cyclops scutifer, which is part of the ”Latn ja jaure project” (a study of the principles involved in the ecosystem of a small -initially fish free- mountain lake, before and after the introduction of fish). The field work consisted of sampling in Lake Erken in Roslagen in June, July and September, as well as in Latn ja jaure in the Abisko mountains in August and September of 1965. Additional sampling was done in Latn ja jaure for the study of the horizontal, vertical and temporal distribution of Cyclops scutifer, as well as the in situ development of the different stages. These samples have been analysed in such a way as to fit into the frame work of future studies on the population dynamics of Cyclops scutifer, The main aim of the present investigation is the determination of the dependence upon tempera- tare of the development of the embryo in the subarctic Cyclops scutifer as compared with the conditions found in the warm water species Mesocyclops leuckarti.
    Description: Translation from the original thesis published in 1966. Translated from Swedish into English
    Keywords: Biology ; Limnology ; Freshwater lakes ; Freshwater ecology ; Population dynamics ; Freshwater crustaceans ; Embryonic development ; Distribution ; Sweden
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  • 3
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    On the sensillae of the limbs of Cladocera. [Translation of: Zoologicheskie Zhurnal 46, 286-288, 1967] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4765 | 1256 | 2011-09-29 15:55:10 | 4765 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: Sensillae of the limbs of Cladocera are described with emphasis on Eurycercus lamellatus.
    Description: Translated from Russian into English
    Keywords: Biology ; Limnology ; Freshwater crustaceans ; Animal morphology ; Sense organs
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  • 4
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    On the feeding of freshwater ostracods. [Translation of: Zoologicheskij zhurnal, 27(2), 1948, 125-136] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4762 | 1256 | 2011-09-29 15:55:00 | 4762 | Freshwater Biological Association
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    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
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  • 5
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    Observations on the behaviour of Polyphemus pediculus and functions of its extremities in the process of feeding. [Translation of: Materialy po biologii i gidrologii Volzhskikh vodokhranilishch, pp. 13-16. Moscow, 1965] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4764 | 1256 | 2011-09-29 15:55:08 | 4764 | Freshwater Biological Association
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    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
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  • 6
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    Structure of the limbs and its significance for the ecology and systematics of the family Chydoridae. [Translation of: Voprosy Gidrobiologii, p385, 1965] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4766 | 1256 | 2011-09-29 15:55:11 | 4766 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: For an explanation of the dynamics of numbers of chydorids, appearing a massive group in the littoral of fresh water bodies, the structure of the limbs of 29 species was studied.
    Description: Translated from Russian into English
    Keywords: Biology ; Limnology ; Freshwater crustaceans ; Animal morphology ; Animal organs ; Chydoridae
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  • 7
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    On the nutrition of the predatory cladocerans Leptodora and Bythotrephes. [Translation of: Byulleten' Institute Biologii Vodokhranilishch 6, pp. 21-22, 1960] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4768 | 1256 | 2011-09-29 15:55:26 | 4768 | Freshwater Biological Association
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    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
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  • 8
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    Occurrence of the Macrocyclops distinctus (Richard) (Copepoda, cyclopoidida) in Rybinsk reservoir. [Translation of: Materialy po biologii i gidrologii Volzhskikh Vodokhranilishch. Moscow, Leningrad 1963, pp. 13-16] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4763 | 1256 | 2011-09-29 15:55:07 | 4763 | Freshwater Biological Association
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    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
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  • 9
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    On the nutrition of Polyphemus pediculus (L.). [Translation from: Trudy Instituta Biologii Vnutrennykh Vodnany 12(15) 170-174, 1966.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4787 | 1256 | 2011-09-29 15:54:01 | 4787 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: Many sides of the biology of Polyphemus pediculus are adequately studied at the present time. Most complicated is the question of its feeding. Dissection does not give an idea of the composition of the food, since Polyphemus strongly grinds its food with its mandibles. For clarification of the composition of the food of Polyphemus pediculus, the authors carried out in July and August 1962 a series of experiments with the application of radio-carbon methods in order to judge the degree of utilization of one or other foods by the quantity of C14, accumulated in the body of the crustacean after feeding. Particular attention in these experiments was given to the question of the possibility of the utilization by polyphemus of plant food - bacteria, algae and detritus.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Food composition ; Feeding ; Algae ; Carbon 14 ; Bacteria ; Detritus ; Polyphemus pediculus
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  • 10
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    Some observations on the temporal variations of size of copepods and some answers to questions on their biology. [Translation from: Internationale Revue der Gesamten Hydrobiologie und Hydrographie 17 99-114, 1927.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4789 | 1256 | 2011-09-29 15:53:57 | 4789 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: Until now observations on the temporal variation of size of freshwater copepods have not provided much information. Other observers only mention in passing this or that phenomenon from which it is possible to deduct termporal variations. In this study Cyclops strenuus s.l., a freshwater species of fairly wide distribution, is studied in two water bodies. The author studies the systematic, placing of inhabitants described as C. strenuus Fischer in both locations, their annual life cycle, and their annual size variations.
    Description: Translated from German into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater Lakes ; Freshwater crustaceans ; Temporal distribution ; Temporal variations ; Life cycle ; Cyclops strenuus
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  • 11
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    On the population dynamics of Eudiaptomus gracilis Sars and Heterocope borealis Fischer in the Bodensee-Obersee. Part B. Eudiaptomus gracilis Sars. [Translation from: Trudy Instituta Biologii Vnutrennykh Vodnany 12(15) 170-174, 1966.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4788 | 1256 | 2011-09-29 15:53:59 | 4788 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: Experimental research was conducted to study the development of eggs of Eudiaptomus gracilis Sars. The egg production was studied as well as the population dynamics. Factors like losses in the lake and through the effluent Rhine at Konstanz were considered.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater Lakes ; Eggs ; Embryonic development ; Experimental research ; Population dynamics ; Freshwater crustaceans ; Eudiaptomus gracilis ; Germany ; River Rhine
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  • 12
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    Key to the identification of the naupliar instars of the genus Cyclops. [Translation from: Arb.biol.Stat.Kossino 5 31-39, 1927. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4791 | 1256 | 2011-09-29 15:53:46 | 4791 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: This is a short excerpt of the original paper giving the key to the identification of the naupliar instars of the genus Cyclops.
    Description: Translated from German into English
    Keywords: Biology ; Limnology ; Freshwater crustaceans ; Identification keys ; Taxonomy ; Cyclops
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  • 13
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    Quantitative data on the feeding of Cyclops strenuus Fischer and Cyclops viridis Jurine. [Translation from: Trudy saratov.Otd.vses.nauchno-issled.Inst.ozer.rech.ryb.Khoz. 1, 163-176, 1951.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4800 | 1256 | 2011-09-29 15:53:35 | 4800 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: Cyclopids, exactly in the same way as daphnids, significant component in the nutrition of plankton-f and the young of the majority of fishes. It is established that the food spectrum of cyclopids is extremely broad: daphnids, planarians, Copepodite stages of copepods (cannibalism), rotifers, protists, bacteria, phytoplankton and so on. It is clear that the problem of studying these or other components of feeding in the general food spectrum can be definitely resolved only after obtaining exact quantitative data on the feeding of cyclopids. This article attempts to fill the gap in the study of the quantitative side of the feeding of cyclopias; in it is investigated the size of the 24-hour ration of cyclopids feeding on protists, the dependence of the ration on some factors of the external medium, and the difference of 24-hour consumption per unit weight of tody with two species of cyclopids (Cyclops strenuus and Cyclops viridis).
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Food composition ; Feeding behaviour ; Data acquisition ; Nutrition ; Experimental data ; Russia ; Cyclops strenuus ; Cyclops viridis
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  • 14
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    On the methods of determining size/weight characteristics of food organisms of fish. (Determination of the length of Copepoda in larval stages by egg-laying females of the free living freshwater Copepoda). [Translation from: Voprosy Ikhtiologii 14, 182-194, 1960. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4802 | 1256 | 2011-09-29 15:52:17 | 4802 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: As is known, copepods play an important role in the nutrition of fish. Therefore with a view to facilitating research on the study of the quantitative side of feeding, there have recently appeared a considerable number of papers devoted to the development of methods for determining the wet. weight of these crustaceans. For the further facilitating of research in the nutrition of fish it would be of great interest to clarify the problem, is there not some kind of rule in the growth of the crustaceans during metamorphosis, and if there is such a rule is it not possible, to determine the length of the larvae at each stage, not by measuring them, but by using the formulae derived on the basis of these rules. This article examines the growth curves of different species of freshwater Copepoda, obtained on the basis of experimental observations in cultures or by way of measurement of mass material at all stages of development in samples from water-bodies. The authors study in particular the ratio of the mean diameter of the eggs to the mean length of the egg-bearing females.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Growth ; Growth curves ; Life cycle ; Larvae ; Formulae ; Copepoda
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  • 15
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    The predatory feeding of Acanthocyclops viridis (Jur.) (Copepoda, Cyclopoida). [Translation from: Trudy Inst.Biol.Vodokhranil. 2(5) 117-127, 1959. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4799 | 1256 | 2011-09-29 15:53:30 | 4799 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: The feeding of freshwater copepods, especially cyclopoida, has been poorly covered in research so far. The majority of existing special works on the feeding of cyclopoida illustrate this question only from the qualitative side. The food content of the nauplius of freshwater cyclops has not been studied at all, as also the feeding of adult entomostracans on bacteria. Moreover the question of the suitability of vegetable food for Cyclops is not clear enough. This article aims to elucidate as fully as possible the nutrition of Acanthocyclops viridis (Jur.) - a large cyclops, inhabiting the mass of demersal layers of the open parts of the Rybinsk reservoir and its foreshore. The present work is devoted only to the predatory feeding of A. viridis, and includes data from the content of the intestines of cyclops, collected in natural conditions, and also the results of experimental observations carried out in a laboratory during 1958.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Feeding ; Nutrition ; Experimental research ; Feeding behaviour ; Russia
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  • 16
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    Significance of the photoperiod for the development of Cyclops vicinus. [Translation from: Zoologischer Anzeiger Supplementband 33, 190-195, 1969.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4806 | 1256 | 2011-09-29 15:52:39 | 4806 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: The significance of the photoperiod, a well-known phenomenon with arthropods, for the development of Cyclops vicinus were studied in laboratory conditions. There are indications that the point of the development process (development of the eggs and proportion of sexes) can be influenced through the photoperiod.
    Description: Translated from German into English
    Keywords: Biology ; Limnology ; Experimental data ; Freshwater crustaceans ; Light effects ; Photoperiodicity ; Developmental stages ; Insect eggs ; Life cycle ; Light ; Cyclops vicinus
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  • 17
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    Key to the identification of the naupliar instars of the genus Cyclops. [Translation from: Arb.biol.Stat.Kossino 5 31-39, 1927.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4807 | 1256 | 2011-09-29 15:52:40 | 4807 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: This is a short excerpt of the original paper giving the key to the identification of the naupliar instars of the genus Cyclops.
    Description: Translated from German into English
    Keywords: Biology ; Limnology ; Freshwater crustaceans ; Identification keys ; Taxonomy ; Cyclops
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  • 18
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    The possibilities and dangers in using malachite green in pisciculture.[Translation from: Informatsionnyi Byulleten Biologiya Vnutrennikh Vod No.3 17-21, 1969.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4804 | 1256 | 2011-09-29 15:52:21 | 4804 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: For many years a dye has been used in the practise of pisciculture and pond management, which is known by the name of malachite green, and is used to combat fungus on fish, fish eggs and external animal parasites on fish. The authors describe the problem of the application of malachite green in pisciculture and undertake special, complementary research.
    Description: Translated from Russian into English
    Keywords: Biology ; Fisheries ; Limnology ; Dyes ; Fish culture ; Freshwater fish ; Fish eggs ; Fungal diseases ; Toxicity tests ; Experimental research ; Oncorhynchus mykiss ; Rutilus rutilus
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  • 19
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    Investigations on the vertical migration of planktonic Crustacea in the Bodensee-Obersee. [Translation from: Schriften des Vereins fur Geschichte des Bodensees und seiner Umgebung, 87, 177-187, 1969.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4809 | 1256 | 2011-09-29 15:52:44 | 4809 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: The vertical zoning of the planktonic Crustacea in a lake is the expression of a complex set of different factors. Besides the measurable, external influences such as light, temperature, acid and C02 stratification, a particularly large part is played by internal factors, which co-ordinate a specific reaction in each species depending on state of development, age and sex. Supporting this extensive, predictable, annual course of diurnal depths and the daily vertical migrations, whose extent is again dependent on external conditions, primarily of course on the amount of light. The individual factors mentioned, however, are here also of great significance. Within the scope of a long-term study of the planktonic Copepoda of Lake Constance, some day and night series were in 1963 also carried out in the Obersee, in order to obtain at least volumetric data on the extent of the daily migrations of these creatures.
    Description: Translated from German into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater lakes ; Freshwater crustaceans ; Vertical migrations ; Biological surveys ; Lake Constance
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  • 20
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    Histochemical investigations on the interrenal system of the brook lamprey (Lapetra planeri Bloch). [Translation from: Acta biol.med.germ. 24, 553-554, 1970. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4810 | 1256 | 2011-09-29 15:52:45 | 4810 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: Histochemical experiments are conducted in order to study the interrenal cells of European brook lamprey (Lampetra planeri).
    Description: Translated from German into English
    Keywords: Biology ; Limnology ; Freshwater fish ; Histochemistry ; Histology ; Fish larvae ; Cells ; Lampetra planeri ; Petromyzon marinus
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  • 21
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    Investigations into the structure and function of the exocrine pancreas of lampreys. [Translation from: Morph.Jb. 110 245-269, 1967.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4820 | 1256 | 2011-09-29 15:51:24 | 4820 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: As representatives of the most primitive of recent vertebrate groups, lampreys show fundamental differences in different features of organisation to the species of the remaining classes of vertebrates. The topical distinction between exocrine and endocrine pancreas is also considered among the morphological peculiarities of Petromyzontida. This study aims to contribute to a further explanation of this phenomenon. 50 brook lampreys were histologically examined.
    Description: Translated from German into English
    Keywords: Biology ; Limnology ; Freshwater fish ; Histology ; Fish larvae ; Cells ; Pancreas ; Lampetra planeri ; Lampetra japonica
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  • 22
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    Recent investigations on zooplankton in the Limnological Institute of the University of Freiburg, in Falkau (Germany). [Translation from: Acta cient.Venezolana 18, 94-97, 1967. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4811 | 1256 | 2011-09-29 15:52:15 | 4811 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: Histochemical experiments are conducted in order to study the interrenal cells of European brook lamprey (Lampetra planeri).
    Description: Translated from German into English
    Keywords: Biology ; Limnology ; Freshwater lakes ; Zooplankton ; Vertical migrations ; Biological sampling ; Freshwater crustaceans ; Freshwater ecology ; Lake Constance
    Repository Name: AquaDocs
    Type: monograph
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  • 23
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    Observations on the influence of external factors on the duration of the embryonic development and on the molting rhythm of Cyclops vicinus. [Translation from: Oecologia 7, 342-355, 1971.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4813 | 1256 | 2011-09-29 15:51:28 | 4813 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: Investigations on the control of the embryonic and post-embryonic development of arthropods have formed an intensively studied field of zoological research for a long time, Here in especially favourable cases the causal chain from the operation of external factors on the influence of physiological mechanisms, eg. of the hormone variety, is known right through to its primary influences. A comparative approach to the relevant questions was in the main only made in the case of the insects. For crustacea , investigations are available almost exclusively only for the malacostraca. This study examines the influence of the factors of temperature and photoperiod on the entire development of Cyclops vicinus. Tests were made on whether the light-darkness change serves as a regulator for a possible existing molting rhythm - a question which for the entire arthropods has been settled only very rarely. The basic material for the cultures that were examined originates from Lake Constance.
    Description: Translated from German into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Feeding experiments ; Crustacean culture ; Temperature effects ; Light effects ; Moulting ; Embryonic development ; Lake Constance ; Cyclops vicinus
    Repository Name: AquaDocs
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  • 24
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    A case of development of the parthenogenetic embryo in the ovary of Moina macrocopa Straus (Crustacea, Cladocera). [Translation from: Vest. Zool., Kiev 4, p. 86, 1971. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4815 | 1256 | 2011-09-29 15:52:03 | 4815 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: In a survey of histological preparations of several hundreds of Moina macrocopa Straus , one specimen was discovered, in the left ovary of which was found a parthenogenetic embryo. The short article includes an illustration of a transverse section of parthenogenetic female of Moina macrocopa.
    Description: Translated from Russian into English
    Keywords: Biology ; Limnology ; Freshwater crustaceans ; Parthenogenesis ; Histology ; Embryos ; Moina macrocopa
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  • 25
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    A biologically active peptide in the skin of lampreys (Eudontomyzon danfordi vladykovi). [Translation from: Z.Naturforsch. (B), 26(10), 1021-1023, 1971. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4814 | 1256 | 2011-09-29 15:52:01 | 4814 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: In recent years interest in the production and description of kinin-type substances has been greatly intensified. So, for example, bradykinin, phyllokinin, physalaemin, ranatensin and caerulein could be extracted from the skin of amphibians as well as. eledoisin out of the salivary glands of Eledon moschata. An examination of lampreys seemed to us particularly profitable in the search for the incidence of further kinins. Ammocoetes of different sizes and also adults of both sexes of the species Eudontomyzon danfordi vladykovi were studied in this research. This species is found in many tributaries of the Danube. Skin extracts were tested on on isolated rat uterus, rat duodenum, guinea pig ileum and rabbit jejunum, further tests were done in order to determine a peptide character of the biologically active substance.
    Description: Translated from German into English
    Keywords: Biology ; Limnology ; Freshwater fish ; Toxicity tests ; Skin ; Peptides ; Chemical analysis ; Chemical reactions ; Experimental research ; Eudontomyzon danfordi
    Repository Name: AquaDocs
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  • 26
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    A marked effect of water snails on small crustaceans. [Translation from: Anz.Ost.Akad.Wiss 10, 95-99, 1952. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4818 | 1256 | 2011-09-29 15:51:20 | 4818 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: Cases of mutual exclusion of two species of organisms in nature are known in large numbers. In the majority, they make different demands on the environ- ment which makes co-occurrence impossible. Less frequent are those cases in which a definite activity of one species prevents the occurrence of the other in the same region. An experiment was carried out n order to establish if Chydorus sphaericus can co-occur with water-snails. It emerged that a substance soluble in water which is given off by snails is responsible for the negative effect on small crustacea.
    Description: Translated from German into English
    Keywords: Biology ; Limnology ; Interspecific relationships ; Freshwater crustaceans ; Freshwater molluscs ; Experimental research ; Austria ; Lake Neusiedler
    Repository Name: AquaDocs
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  • 27
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    Behaviour and mechanism of feeding of Lathonura rectirostris (Cladocera, Macrothricidae). [Translation from: Zoologicheskie Zhurnal 50, 1002-1010, 1971.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4826 | 1256 | 2011-09-29 15:50:53 | 4826 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: The behaviour in the feeding process and the functional morphology of Lathonura rectirostris O.F. Muller - one of the widely distributed species of macrothricids - is studied. The current work is an attempt at morpho-functional analysis of the apparatus of the trunk appendages of Lathonura rectirostris O.F. Muller. This highly specialized species, the method of feeding of which basically comes to the mechanical scraping-off and collection of epiphytic single-celled algae and particles deposited on the surface of aquatic plants.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Feeding ; Feeding behaviour ; Freshwater ecology ; Animal morphology ; Russia
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  • 28
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    Investigations of certain eco-physiological characteristics of the broad and long-pincered crayfish in connection with their interspecific relationships. [Translation from: Lietuvas TSR Mokslu Akademijos Darbai, C Serija 2(40), 279-286, 1966.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4827 | 1256 | 2011-09-29 15:50:55 | 4827 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: The results are described of eco-physiological investigations of the broad-pincered (Astacus astacus L.J.) crayfish and the long-pincered (Astacus astacus Esch.) crayfish, conducted in 1963—64 in the Institute of Zoology and Parasitology of the Academy of Science of the Lithuanian SSR, for the purpose of studying the interspecific relationship of these two species. In the course of the investigation were determined: the influence of the temperature of the environment on the consumption of oxygen by full grown individuals of both species and on the respiratory movements of the scaphognathites, the threshold temperatures and the saturation of the water by oxygen, the diel activity in the winter period.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Interspecific relationships ; Animal morphology ; Experimental research ; Temperature effects ; Ecophysiology ; Astacus astacus ; Astacus leptodactylus
    Repository Name: AquaDocs
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  • 29
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    Growth and reproduction of Moina rectirostris (Leydig) and Ceriodaphnia quadrangula (O. F. Muller) with feeding on detritus. [Translation from: Sbornik po prudovomu rybovodstvu, 79-89. Moscow, VNIRO, 1969.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4828 | 1256 | 2011-09-29 15:50:56 | 4828 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: The significance of detritus in the nutrition of aquatic animals, especially of the small representatives of the zooplankton, has been studied very slightly. Research so far has established that in M. rectirostris with feeding on protococcal and single-celled green algae and bacteria the beginning of formation of eggs takes place in 2 - 4 days. The young appear in 4 - 6 days. In this study M. rectirostris and C. quadrangula are fed on detritus of natural origin in laboratory conditions. In order to determine the assimilability and productive: effect of detritus, the author set up experiments, permitting to characterize the rate of growth, speed of maturing and fertility of M. rectirostris and C. quadrangula with feeding of them on detritus of different composition and age.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Experimental research ; Laboratory culture ; Feeding ; Feeding experiments ; Animal growth
    Repository Name: AquaDocs
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  • 30
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    Bird migration and the spread of Crustacea. [Translation from: Verhandlungen der Deutschen Zoologischen Gesellschaft 27, 311-316, 1963.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4831 | 1256 | 2011-09-29 15:50:26 | 4831 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: The passive spread of a high percentage of freshwater organisms is one of the most important requirements in short-lived and insular communities for species to attai n and survive - and consequently to balance the lack of a topographical continuity of most inland waters. Unfortunately hardly anything is known about the amounts of seed material typical for any lake into which it is carried. The causes of passive dissemination - wind, water and animals as well as man - are confirmed by many examples. It has been assumed now for at least a hundered years that , among animals, birds play a prominent role, although also disappointingly few facts are at hand. The passage and spread through birds' intestines has up to now been supported only by some limited data. This paper reports on experimental research where the eggs of Daphnia magna, Triops cancriformis, Artemia salina, Diaptomus spinosus and Cypris pubera were introduced by means of gelatine capsules into the oesophagus of a drake. The bird's excrements were inspected under a microscope for eggs and resting stages, and these were transferred into corresponding cultures.
    Description: Translated from German into English
    Keywords: Biology ; Ecology ; Limnology ; Aquatic birds ; Digestion ; Faecal pellets ; Dispersion ; Dispersants ; Experimental research ; Freshwater crustaceans
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  • 31
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    The transport of aquatic animals by birds. [Translation from: Binnengewaesser 18, 156-159, 1950.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4832 | 1256 | 2011-09-29 15:50:52 | 4832 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: A great deal has been written on the part which birds play in the dispersal of freshwater fauna. This article summarises literature on the dispersal of aquatic animals by birds and aquatic insects.
    Description: Translated from German into English
    Keywords: Biology ; Ecology ; Limnology ; Aquatic birds ; Dispersion ; Dispersants ; Freshwater crustaceans ; Freshwater ecology ; Aquatic insects
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  • 32
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    The changes in various iron compounds in culture media for algae. [Translation from: Archiv fur Hydrobiologie Supplemente Band 38(1/2) 151-169, 1970.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4839 | 1256 | 2011-09-29 15:49:48 | 4839 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: The purpose of this work is a contribution to the quantitative record of the use of iron by planktonic algae. Preliminary experiments with Chlorella to determine the rate of iron intake in the presence of inorganic sources of iron did not produce the desired result. The crucial point of this work is the investigation of the influence of various external factors on the stability of FeEDTA (FeEDTA = Ferric(III)-compound of ethylene-diamine tetra-acetic acid), since this compound appears to be particularly well-suited as a source of iron for planktonic algae (e.g. TAMIYA et al. 1953). Cultures of Chlorella fusca in a light thermostat were used in experimental research. Methods and results are discussed.
    Description: Translated from German into English
    Keywords: Chemistry ; Ecology ; Limnology ; Biometrics ; Biological sampling ; Geographical distribution ; Population density ; Population characteristics ; Population number ; Freshwater crustaceans ; Population dynamics
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  • 33
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    Methods of feeding of some macrothricids (Cladocera, Macrothricidae). [Translation from: Informatsionnyi Byulleten Biologiya Vnutrennikh Vod 16, 29-34, 1973.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4833 | 1256 | 2011-09-29 15:50:18 | 4833 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: The feeding methods of macrothricids was investigated in three species — Ophryoxus gracilis G.O. Sars, Ilyocryptus sordidus (Lievin) and Lathonura rectirostris O.F.Muller. The procuring of food in those species follows two methods: filtration of dispersed particles or scraping off and collecting food from the surface of the substrate. When collecting food by scraping off is the sole method of feeding (as in Lathonura rectirostris), movement along the substrate and feeding are combined so intimately that they appear as parts of one and the same mechanism.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Animal physiology ; Feeding ; Feeding behaviour ; Filter feeders
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  • 34
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    Changes in the organism of females of some Cladocera in transition to gamogenesis. [Translation from: Zoologicheskie Zhurnal 49 1573-1575, 1970. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4835 | 1256 | 2011-09-29 15:50:15 | 4835 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: In species of Cladocera not forming ephippia, the latent eggs have a sheath formed by glands of the reproductive canals. Representatives of the families Daphniidae and Moinidae Goulden, 1968, in connection with the formation of their complex-structured ephippia, lost these glands. It was investigated whether there are such glands in species the latent eggs of which are enclosed in primitive ephippia. For this, with the help of histological methods, 55 females of Acroperus elongatus (Sars) (Chydoridea) and 88 females of Lathonura rectirostris (O. F. Muller), (Macrothricidae) were collected near Leningrad, were studied.
    Description: Translated from Russian into English
    Keywords: Biology ; Limnology ; Sexual reproduction ; Females ; Histology ; Freshwater crustaceans ; Animal reproductive organs ; Lathonura
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  • 35
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    On the ecology of species belonging to the genus Mesocyclops Sars (Crustacea, Copepoda) dwelling in the water-bodies of the Urals and Pri-Ural territory. [Translation from: Zoologicheskie Zhurnal 44(1) 127-130, 1965. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4842 | 1256 | 2011-09-29 15:50:07 | 4842 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: In the waterbodies of central Russia, the Urals and western Siberia four species of Crustacea, related to the genus Mesocyclops, are widely distributed: M. (s.str.) leuckarti (Claus), M. (Thermocyclops) oithonoides Sars, [M.](Th.) crassus (Fisch.) and M. (Th.) dybowskii (Lande). Numbers and biomass of Mesocyclops oithonoides in the pelagic water of various water-bodies of the Urals are presented and observations on the above mentioned species are discussed.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Biomass ; Freshwater crustaceans ; Population number ; Freshwater ecology ; Russia ; Urals
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  • 36
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    Determination of dissolved oxygen in water with leukoberbelin-blue I. A quick Winkler method. [Translation from: Z.analyt.Chem. 262 97-99, 1972.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4843 | 1256 | 2011-09-29 15:49:28 | 4843 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: The reaction of Mn(II) with water-dissolved oxygen, to a higher manganese hydroxide in an alkaline medium, as with the longstanding classic Winkler method, is the first step in the method described here. The assumption for faultless results by the conventional and modified Winkler method is clean water, which contains no organic substances by Mn(III) or Mn(IV). In many cases, however, eg. in river and lake-water tests, it can be seen with the naked eye that after some time the originally brown-coloured precipitate of manganese hydroxide becomes more and more colourless. Oxygen content was analysed in the water samples and evaluated by raising the amount of the leuko-base and giving the corresponding dilution of the colouring matter solution formed still higher oxygen contents can be measured.
    Description: Translated from German into English
    Keywords: Chemistry ; Ecology ; Limnology ; Methodology ; Experimental research ; Dissolved oxygen ; Analytical techniques ; Water analysis
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  • 37
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    Chydoridae of the world's fauna. [Translation from: Fauna SSSR, Crustacea 1 (2), Nauka, Leningrad, 1971. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4841 | 1256 | 2011-09-29 15:49:51 | 4841 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: This translation presents identification keys to the subfamilies, genera, species and subspecies of Chydoridae of the USSR. Chydoridae are a family in the order of Cladocera.
    Description: Translated from Russian into English
    Keywords: Biology ; Limnology ; Identification keys ; Freshwater crustaceans ; Chydoridae
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  • 38
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    Study on the dynamics of the population of a copepod (Eudiaptomus vulgaris Schmeil). [Translation from: Memorie dell'Istituto Italiano di Idrobiologia Dott.Marco de Marchi 13 179-202, 1961. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4838 | 1256 | 2011-09-29 15:49:46 | 4838 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: Eudiaptomus vulgaris Schmeil is the most abundant copepod in Lake Maggiore and forms also, in respect to other entomostraca, the most important element, through its average biomass and because it is fairly numerous throughout the year. Plankton samples collected in a systematic and quantitative way, gave the opportunity to study some aspects of the dynamics of the population of this copepod, in safety in view of the uncertainty which in this kind of study can ensue when samples are taken only at a single station - in consequence of the changes in size of population between different water masses. The results of the biometrical observations are of the population of Eudiaptomus vulgaris is presented.
    Description: Translated from Italian into English
    Keywords: Biology ; Ecology ; Limnology ; Biometrics ; Biological sampling ; Geographical distribution ; Population density ; Population characteristics ; Population number ; Freshwater crustaceans ; Population dynamics
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  • 39
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    Cytological aspects of gonadotropic cells and pre-opticoneurohypophysial neurosecretion during the ovarian cycle of Eudontomyzon danfordi. [Translation from: Studia Univ.Babes-Bolyai, Biologia 18 105-113, 1973.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4845 | 1256 | 2011-09-29 15:49:33 | 4845 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: The connection between the activity of the gonadotropic cells of the hypophysis and the neurosecretion in the pre-optico neuro-hypophysial system in different groups of vertebrates has been examined by many authors. It has been established that in many species there exists some kind of synchronism between the sexual cycle and the cellular activity of neurosecretion, a fact that has led to the prevailing idea that gonadotropic activity in the hypophysis is regulated by the hypothalamus. This paper summarises the results of experiments made in this direction on Cyclostomata. The materials for research came from adult individuals of Eudontomyson danfordi Regan taken from the rivers Somes-Rece and Ivo (Harghita district) at different times of the year.
    Description: Translated from Romanian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater fish ; Histology ; Cytology ; Secretion ; Staining
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  • 40
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    Comparative investigations on the respiratory physiology of euryhaline gammarids with special reference to salinity adaptation. [Translation from: Helgolaender Wissenschaftliche Meeresuntersuchungen 23(4) 485-534, 1972.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4846 | 1256 | 2011-09-29 15:49:35 | 4846 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: Members of the family Gammaridae are very closely interrelated. There arises the question as to how far they also differ amongst themselves through physiological characteristics. Comparative respiratory and physiological experiments were made on the five euryhaline species Gammarus locusta, G. oceanicus, G. salinus, G. zaddachi and G. duebeni. The respiratory measurements carried out within the framework of this experiment were occupied with the relationships between oxygen consumption and body size depending on salinity. They also had the object of determing the variations in metabolic intensity after an abrupt change in the salt content of the external medium, and to establish the period of time for the process of adaptation. As the experiments were carried out polarographically in a testing plant with continuous flow-through, and the method which was applied permitted continuous recording over prolonged intervals, there could also be carried out comparisons between metabolism at rest and under activity, and the alterations of oxygen consumption during the process of moulting could be measured.
    Description: Translated from German into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Experimental research ; Respiration ; Respiratory organs ; Salinity effects ; Salinity tolerance ; Metabolism
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  • 41
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    On the problem of the distribution of Acanthocyclops viridis Jurine in the Rybinsk reservoir. [Translation from: Byulleten' Institute Biologii Vodokhranilishch 1958(1), 36-39, 1958. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4853 | 1256 | 2011-09-29 15:48:56 | 4853 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: Observations of individual weight, duration of development and production of different stages of Tropodiaptomus incognitus are presented. The study is based on data gathered from Lake Chad in 1968.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Freshwater lakes ; Distribution ; Samplers ; Biological sampling ; Water reservoirs
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  • 42
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    Individual weight, development time and yield of different stages of Tropodiaptomus incognitus (Crustacea: Copepoda). [Translation from: Cahiers ORSTOM, Serie Hydrobiologie 4(1) 63-70, 1970. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4852 | 1256 | 2011-09-29 15:48:54 | 4852 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: Observations of individual weight, duration of development and production of different stages of Tropodiaptomus incognitus are presented. The study is based on data gathered from Lake Chad in 1968.
    Description: Translated from French into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Freshwater lakes ; Developmental stages ; Biomass ; Lake Chad
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  • 43
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    Experiments with the hatching of salmon spawn 1966-1971. [Translation from: Vann 1972(1) 86-938, 1972] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4855 | 1256 | 2011-09-29 15:48:01 | 4855 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: Experiments were undertaken with the purpose to find out the tolerance of different species of salmon fish in acid hatching water and if different strains of the same species differ in their response. The study was made in the Fins-river hatchery, Marnardal and the assumption tested that the salmon and trout stock from Sorland are adapted to the more acid milieu, and thus more robust in acid water than are comparable fish stocks from areas where the water is only a bit acid or neutral.
    Description: Translated from Norwegian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater fish ; Hatching ; Experimental research ; Acidity ; Kelt ; Norway ; Salmonidae
    Repository Name: AquaDocs
    Type: monograph
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  • 44
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    Nitrogen and phosphorus forms in water and the food requirements of algae. [Translation from: Wiadomosci Ekologiczne 19 238-244, 1973. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4848 | 1256 | 2011-09-29 15:49:18 | 4848 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: When dissolved in water, compounds of nitrogen and phosphorus ought to contain the basic assimilated food requirements for autotrophic plants and therefore autotrophic algae. This article summarises the occurrence of nitrogen in water, how species of algae utilize nitrogen and phosphorus forms for growth and the capacities of algae to adapt to environments of different nutrient wealth. This topic has unquestionable importance not only for the purpose of survival of a species but also in deciding indirectly about the stability of ecosystems.
    Description: Translated from Polish into English
    Keywords: Biology ; Chemistry ; Limnology ; Algae ; Nitrogen fixation ; Nitrogen ; Phosphorus ; Nutritional requirements ; Bacteria ; Organic compounds
    Repository Name: AquaDocs
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  • 45
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    On the structure of the seminal receptacle in cyclopids (Copepoda, Cyclopoida). [Translation from: Informatsionnyi Byulleten Biologiya Vnutrennikh Vod (6) 26-31, 1970.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4849 | 1256 | 2011-09-29 15:49:14 | 4849 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: The seminal bag, or seminal receptacle, forms a characteristic organ of cyclopids, serving for retention of the sperms discharged from the spermatophores. The structure of the seminal receptacle, more precisely its form, is fairly widely used in diagnosis and undoubtedly can be more widely applied in the systematics of the group. Within the limits of the family Cyclopidae it is possible to distinguish crustaceans with three basic types of seminal bag. The differences consist of the position which this organ occupies in the genital segment. of one species, we carried out a series of observations on its formation in ontogenesis and during the life of the adult stage. As material for observation the study used laboratory cultures of three species; Acanthocyclops americanus (Marsh) from the plankton of the Moscow River, Cyclops vicinus Uljan and Mesocyclops leuckarti Glaus from the plankton of the channel section of the upper part of the Gorkovsk reservoir. The author concluded that the irreversibility of the changes in the seminal receptacle presents the possibility of utilising this structure as one of the indicators of the growth of the individual.
    Description: Translated from Russian into English
    Keywords: Biology ; Limnology ; Freshwater crustaceans ; Animal reproductive organs ; Taxonomy ; Laboratory culture ; Russia
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  • 46
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    Action of ecdysterone on the moulting of amphipod females: Gammarus pulex (L.) and G.fossarum Koch. Early results. [Translation from: Crustaceana 28, 86-88, 1975.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4854 | 1256 | 2011-09-29 15:48:58 | 4854 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: In studying sexual attraction in gammarids of the group pulex, it has seemed necessary to dissociate the processes of moulting and ovogenesis in order to recognize their respective effects on this phenomenon. For this purpose a synthetic hormone, ecdysterone, was utilized. In the first instance the author followed the action of the hormone on isolated females in vitellogenesis. It was proved that the behaviour of Gammarus pulex and Gammarus fossarum vis-a-vis the ecdysterone used proves to be very close to that of isopods that was observed in Orchestia gammarellus in earlier research. Although they were in vitellogenesis, the females saw their intermoult cycle shortened.
    Description: Translated from French into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Experimental research ; Oogenesis ; Moulting ; Ecdysons ; Vitellogenesis
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  • 47
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    Holopedium gibberum - an indicator of soft-water lakes? [Translation from: Fauna 21 130-132, 1968.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4862 | 1256 | 2011-09-29 15:47:51 | 4862 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: In fresh waters the planktonic Crustacea are represented mainly by the two large groups, the Copepoda and the Cladocera. This study focuses on Holopedium gibberum and examines if the plankton is an indicator of soft-water lakes. H. gibberum is found throughout the northern half of the globe but its distribution is scattered and irregular. The study is based on a literature review and samples taken from water bodies in Norway.
    Description: Translated from Norwegian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Zooplankton ; Calcium carbonates ; Indicator species ; Norway
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  • 48
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    Physiology of nitrate reduction in Pseudomonas aeruginosa. [Translation from: Z.allg.Mikrobiol. 13, 83-94, 1973.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4856 | 1256 | 2011-09-29 15:48:26 | 4856 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: Pseudomonas aeruginosa has for some time been known as a denitrifier. Pseudomonas aeruginosa was chosen for further studies, because P. aeruginosa occurs abundantly in Plusssee and moreover there are contradictory assertions on the gas products of denitrification by this bacteria. In experimental research the pattern of growth and gas production of Pseudomonas aeruginosa on nutrient broth was studied.
    Description: Translated from German into English
    Keywords: Chemistry ; Ecology ; Limnology ; Experimental research ; Bacteria ; Freshwater lakes ; Growth ; Microbiological culture ; Plusssee
    Repository Name: AquaDocs
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  • 49
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    Relationship of dimensions and weight in freshwater planktonic crustaceans. [Translation from: Doklady Akademii Nauk SSSR 84(1) 153-156, 1952. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4857 | 1256 | 2011-09-29 15:48:28 | 4857 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: There is no doubt that determination of the biomass of zooplankton (primarily of crustaceans) will be taken into consideration in practice and limnological works, especially after the recent publication of fairly comprehensive tables of weights of a whole range of species of freshwater copepods and cladocerans. The usefulness of applying formulae of determining the biomass of marine crustaceans for freshwater copepods is discussed.
    Description: Translated from Russian into English
    Keywords: Chemistry ; Ecology ; Limnology ; Freshwater crustaceans ; Zooplankton ; Biomass ; Formulae
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  • 50
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    Fundamental aspects of the feeding of the amphipod Gammarus (R.) balcanicus (Crustacea, Amphipoda). [Translation from: Nauchn.Dokl.vyssh.Shkoly (Biol.Nauk) 1970(7) 12-16, 1970] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4870 | 1256 | 2011-09-29 15:47:52 | 4870 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: The amphipods are major food items for many commercial fishes, and they are used as protein food for agricultural animals. In the present paper are presented the results of four-year observations on the feeding of Gammarus balcanicus in nature and in an aquarium. Among the studied aspects were the dependence of daily food ration on sex and physiological state (with and without eggs) and feeding on different kinds of plant food. The study concludes that Gammarus balcanicus willingly feed on soft half-decayed plant residues; into their ration also enters food of animal origin. In contrast to other amphipods, G. balcanicus eats representatives of its own species very rarely, and only dead or immobile ones.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Feeding ; Feeding behaviour ; Feeding experiments ; Food composition ; Experimental research ; Gammarus balcanicus
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  • 51
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    Diurnal periodicity of winter activity in the perch, Perca fluviatilis L. [Translation from: Kalamies 1973(1) 3.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4873 | 1256 | 2011-09-29 15:47:26 | 4873 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: Since 1967 data have been collected on the distribution of fish caught in a 24 hour period during the winter angling season. The present study on activity periods is based on data from nearly 2000 perch collected between 1967 and 1971. The distribution of number of fish caught during 24 hrs during December - May was studied. Of the total, the most productive period was found to be between 0600 - l600 hrs., with the peak period occurring between 0800 - 1000 hrs. The present data together show that during the darkest months of the year, the perch is only active in the mid-day period. Throughout the whole winter fishing season, activity only occurs during the time between surise and sunset.
    Description: Translated from Finnish into English
    Keywords: Biology ; Fisheries ; Limnology ; Feeding ; Freshwater fish ; Activity patterns ; Light effects ; Winter ; Perca fluviatilis ; Finland
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  • 52
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    Seasonal variation in the diurnal periodicity of activity of the perch, Perca fluviatilis L. [Translation from: Kalamies 1973(3) 3.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4874 | 1256 | 2011-09-29 15:47:46 | 4874 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: The most common catch of the amateur angler is the perch and it is the diurnal periodicity of activity (& catchability) which is examined in this study based on earlier articles and manuscripts by the authors. Of all environmental factors, variation in light and temperature are the chief reasons in establishing the times of activity periods. Winter, summer and autumn activity was studied. The spawning perch was found to be more active than the non-spawning perch. The time of day in which the fish may be active is dependant on its ability to sense changes in the external environment. Its adaptation to light is the reason for day-activity in the winter, and also accounts for the fact that hardly any activity occurs between sunset and sunrise when this period exceeds 6 hours.
    Description: Translated from Finnish into English
    Keywords: Biology ; Fisheries ; Limnology ; Freshwater fish ; Activity patterns ; Light effects ; Seasons ; Seasonal variations ; Temperature effects ; Water temperature ; Perca fluviatilis ; Finland
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  • 53
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    Diurnal periodicity of activity in the spawning perch P. fluviatilis L. [Translation from: Kalamies 1972(7) 3, 1972] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4872 | 1256 | 2011-09-29 15:47:24 | 4872 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: Diurnal periodicity of spawning in the perch so far are rather meagre and found to be partly contrary to experiences of perch anglers. Therefore a study was made on the spawning during a 5-day period in the spring of 1971 in the Kuusamo area. Observations were made during the main spawning season, between 4- 9 June 1971. The perch were often measured, weighed and then released back into the water. The differences between spawning and non-spawning perch were studied as well as the time of roe discharge in a 24 hour period. Activity and environmental factors such as light intensity were also taken into consideration.
    Description: Translated from Finnish into English
    Keywords: Biology ; Fisheries ; Limnology ; Spawning ; Freshwater fish ; Activity patterns ; Roes ; Light effects ; Perca fluviatilis ; Finland
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  • 54
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    Activity of perch, Perca fluviatilis L. in relation to water temperature [Translation from: Kalamies 1973(6) 4.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4875 | 1256 | 2011-09-29 15:47:47 | 4875 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: Catchability and activity of Perca fluviatilis in relation to temperature is examined. The number of fish caught and water temperature during the 3 summer months was used the assess the numbers of hours of activity of perch. Parallel to the research on activity, large-scale marking was carried out to establish the periods of growth during the year.
    Description: Translated from Finnish into English
    Keywords: Biology ; Fisheries ; Limnology ; Freshwater fish ; Activity patterns ; Seasonal variations ; Temperature effects ; Water temperature ; Animal growth ; Catchability ; Perca fluviatilis ; Finland
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  • 55
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    For the determination of iron (II) and total iron with 2,2'-dipyridyl in mineral waters. Reduction of iron (III) with ascorbic acid [Translation from: Zeitschrift fur Analytische Chemie 209 340-341, 1965] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4877 | 1256 | 2011-09-29 15:47:02 | 4877 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: The determination of bi- and trivalent iron in proximity, in mineral waters has gained in significance, on biological and technical grounds. This short paper describes the procedure of the determination of bivalent iron and total iron in a water sample.
    Description: Translated from German into English
    Keywords: Chemistry ; Limnology ; Iron ; Acids ; Analytical techniques ; Minerals ; Water analysis
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  • 56
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    The effects of temperature on growth and metabolism of flowing water cold-stenotherms [Translation from: Archiv fur Hydrobiologie 74(4) 479-495, 516-522, 1974] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4878 | 1256 | 2011-09-29 15:47:04 | 4878 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: A small stream in the French Alps was sampled at regular intervals to determine the size distribution of animals for growth studies. The temperature was also measured. The results obtained for Gammarus fossarum were compared with laboratory cultures and the laboratory animals were physiologically and chemically analysed. Chemical analysis was also carried out on field animals.
    Description: Translated from German into English
    Keywords: Biology ; Limnology ; Freshwater crustaceans ; Laboratory culture ; Experimental research ; Rivers ; Temperature effects ; Feeding experiments ; Size distribution ; Gammarus fossarum
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  • 57
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    Biology of the amphipod Gammarus pulex L. in water-bodies of the Leningrad district, and its piscicultural importance [Translation from: Trudy Vsesoyuznogo Gidrobiologicheskogo Obshchestva 7 99-122, 1956] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4886 | 1256 | 2011-09-29 15:46:47 | 4886 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: Observations and laboratory experiments are summarised that examine the widely discussed issue of what Gammarus pulex feeds on. On the basis of the observations of the authors and data from the literature it can be noted that G. pulex belongs to the omnivorous organisms, but, depending on the conditions of subsistence, in its rations either plant or animal food can predominate.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Food composition ; Feeding ; Omnivores ; Experimental research ; Gammarus pulex
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  • 58
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    On the diel rhythm of motor activity in perch [Translation from: Informatsionnyi Byulleten Biologiya Vnutrennikh Vod No.30, 12-14, 1976] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4885 | 1256 | 2011-09-29 15:46:45 | 4885 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: The river perch (Perca fluviatilis L.) is most active in the daytime hours, and displays seasonal changes of diel rhythm with a break of the rhythm in spring and autumn. In the present work data were obtained on the motor activity of 3 perch measuring l8-20 cm, caught by net in the littoral of a reservoir and spawned under laboratory conditions. The degree of intensity of movement of perch was judged by special experiments. The results are summarised in this short paper.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater fish ; Activity patterns ; Experimental research ; Perca fluviatilis
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  • 59
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    Reaction of fish to light (”Conclusions” only). [Translation from: Voprosy Ikhtiologii 6 17-20, 1956] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4879 | 1256 | 2011-09-29 15:47:15 | 4879 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: Qualitative and quantitative characteristics of the reaction of certain fish to light were tested and reasons for the attraction of certain fish to light are discussed.
    Description: Translated from Russian into English
    Keywords: Biology ; Limnology ; Freshwater fish ; Experimental research ; Light effects ; Methodology
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  • 60
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    Studies on the mouth size of fish larvae. Method and conclusions only [Translation from: Bulletin of the Japanese Society of Scientific Fisheries 36, 353-368, 1970] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4883 | 1256 | 2011-09-29 15:46:22 | 4883 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: This study was conducted to look into the relationship between mouth size and the total length of larval fish, and the growth in total length of larval fish in one or within a one-year period. Study material was gathered in the South China Sea, the Bay of Bangkok and the Vietnamese coast. This translation focuses on methods and conclusions of the original (longer) paper.
    Description: Translated from Japanese into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater fish ; Animal morphology ; Morphometry ; Fish larvae
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  • 61
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    The vertical distribution of zooplankton in the Goggausee (the influence of algae and Chaoborus flavicans) [Translation from: Carinthia II 166/186 373-385, 1976] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4882 | 1256 | 2011-09-29 15:46:20 | 4882 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: The Goggausee, a small, shallow, meromictic lake(700m long, 150m wide, max. depth=12m, mean depth=6m), was the site of a week long study (19-26 May 1974) of the limnology department of the University of Vienna. The study comprised pollen analysis and palaeolimnological studies on the one hand, as well as a stock- taking of physiochemical factors, primary production, bacteria, zooplankton, zoo benthos and fish on the other. This paper studies the zooplankton of the lake. The Goggausee is a meromictic lake, with its anoxic deep water, that restricts the vertical distribution of most zooplankton. The aim of the study was to pursue the vertical distribution of the rotifers and Crustacea. Density of individuals, biomass, percentages of zooplankton together and crustaceans and rotifers as groups. Special consideration is given to the the Dipteran Chaoborus flavicans.
    Description: Translated from German into English
    Keywords: Biology ; Ecology ; Limnology ; Zooplankton ; Environmental surveys ; Freshwater crustaceans ; Biomass ; Freshwater lakes ; Population density ; Austria ; Chaoborus flavicans
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  • 62
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    Keys to families of Cladocera and to subfamilies, genera, species and subspecies of Macrothricidae and Moinidae [Translation from: Leningrad, Fauna SSSR, Crustacea 1 (3), 1971] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4889 | 1256 | 2011-09-29 15:46:17 | 4889 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: Identification keys to families of Cladocera and to subfamilies, genera, species and subspecies of Macrothricidae and Moinidae are given. This translation does not include ecological notes or illustrations.
    Description: Translated from Polish into English
    Keywords: Biology ; Limnology ; Identification keys ; Taxonomy ; Freshwater crustaceans
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  • 63
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    Fish zoning of some watercourses in Normandy [Translation from: Verhandlungen der Internationalen Vereinigung fuer Theoretische und Angewandte Limnologie 18, 1135-1146, 1972] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4891 | 1256 | 2011-09-29 15:45:56 | 4891 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: The identification of fish zones in western and central Europe has been the objective some major studies. This paper concerns a stream in Normandy specially studied by the author in 1969 and 1970 in the framework of a study on the role of the mean temperature in fish zoning. The paper propounds the comparative study of the morphodynamic and occasionally physico-chemical characteristics, as well as the results of previous sampling by electric fishing of the fish populations of two other streams of the higher Cretaceous layer and supplied by ”chalky” water in Normandy and Picardy.
    Description: Translated from French into English
    Keywords: Biology ; Ecology ; Limnology ; Ecological zonation ; Gradients ; Hydrobiology ; Rivers ; River discharge ; Freshwater fish ; Population characteristics ; Cretaceous ; France
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  • 64
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    Ecological significance of seasonal variation in clutch-size of Arctodiaptomus bacillifer in alpine lakes of high altitudes (Val Bognanco) [Translation from: Bollettino di Zoologia 37 491-492, 1970] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4894 | 1256 | 2011-09-29 15:45:42 | 4894 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: This brief paper describes the significance of seasonal variation in clutch-size of the copepod Arctodiaptomus bacillifer in alpine lakes of high altitudes (Val Bognanco). Seasonal dynamics of the zooplankton of these lakes was studied during summer and autumn of 1968 and 1969and results are summarised.
    Description: Translated from Italian into English
    Keywords: Biology ; Ecology ; Limnology ; Zooplankton ; Freshwater crustaceans ; Freshwater lakes ; Glacial lakes ; Italy
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  • 65
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    The dynamics of the fecundity of fishes, for example the roach, Rutilus rutilus (L.). [conclusions and figure/table captions only] [Translation from: Voprosy Ikhtiologii 3(1) 67-83, 1963] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4897 | 1256 | 2011-09-29 15:43:43 | 4897 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: The dynamics of the fecundity of roach, with emphasis on Rutilus rutilus (L.), were studied in waters in the European parts of the USSR. This translation provides conclusions, and figures and table captions only.
    Description: Translated from Russian into English
    Keywords: Biology ; Limnology ; Freshwater fish ; Fecundity ; Growth rate ; Russia ; Rutilus rutilus
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  • 66
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    Glycocalyx production in teleosts [Translation from: Verhandlungen der Deutschen Zoologischen Gesellschaft, p.286, 1970] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4895 | 1256 | 2011-09-29 15:43:39 | 4895 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: Shielding the organism against harmful effects from the environment is one of the most important tasks of the outer covering of all animals. The epidermis of primarily aquatic organisms and the epithelia of organs which are exposed to water, such as the digestive or the urinary system, possess a film of glycoproteins and mucopolysaccharides, the glycocalyx. This short paper examines the relationship of the mucus cells with the glycocalyx.
    Description: Translated from German into English
    Keywords: Biology ; Limnology ; Cytology ; Digestive system ; Freshwater fish ; Skin ; Teleostei
    Repository Name: AquaDocs
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  • 67
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    The problem of the co-existence of Arctodiaptomus bacillifer (Koelb.), Acanthodiaptomus denticornis (Wierz.) and Heterocope saliens Lill [Translation from: Memorie dell'Istituto Italiano di Idrobiologia Dott.Marco de Marchi 8 81-94, 1954] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4907 | 1256 | 2011-09-29 15:44:45 | 4907 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: In freshwater environments of modest size and without notable ecological structure, there is usually present only one diaptomid species. When two or more diaptomid species are present in the same habitat, generally their body dimensions are distinctly different. There are only four examples of co-existence of Arctodiaptomus bacillifer (Koelb.) and Acanthodiaptomus denticornis (Wierz.) situated at higher altitudes alpine lakes. The article discusses the results of sampling in the summer of 1953 and the problem of the co-existence of Arctodiaptomus bacillifer, Acanthodiaptomus denticornis and Heterocope saliens.
    Description: Translated from Italian into English
    Keywords: Biology ; Ecology ; Limnology ; Zooplankton ; Freshwater lakes ; Interspecific relationships ; Freshwater crustaceans ; Population characteristics ; Arctodiaptomus bacillifer ; Acanthodiaptomus denticornis ; Heterocope saliens
    Repository Name: AquaDocs
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  • 68
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    An identification key of the most important German freshwater teleost fishes by means of their eggs [Translation from: Archiv fur Hydrobiologie 83(2), 200-212, 1978] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4904 | 1256 | 2011-09-29 15:44:35 | 4904 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-04
    Description: The fetal and larval development of many freshwater fish is already relatively well covered. Coverage of the morphology of fish-species' eggs is very sparse. For this reason the authors have attempted to prepare a key on fish eggs which covers the bulk of German Teleostei fish. The key also includes a discussion of problems of categorization and terminology.
    Description: Translated from German into English
    Keywords: Biology ; Limnology ; Freshwater fish ; Identification ; Identification keys ; Terminology ; Fish eggs ; Germany ; Teleostei
    Repository Name: AquaDocs
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  • 69
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    Predation and selection in copepod populations of Alpine waters [Translation from: Bollettino di Zoologia 21 541-545, 1954] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4902 | 1256 | 2011-09-29 15:44:10 | 4902 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: Zooplankton was studied in four alpine lakes in Switzerland, France and Italy. The presence the presence of the invertebrate predator Heterocope in three lakes was stated. It is then discussed why in three of these four lakes, the copepod Arctodiaptomus denticornis is present in the absence of Arctodiaptomus bacillifer, and vice versa respectively in the second and first parts of the lacustrine summer.
    Description: Translated from Italian into English
    Keywords: Biology ; Ecology ; Limnology ; Zooplankton ; Freshwater crustaceans ; Freshwater lakes ; Predators ; Abundance ; Arctodiaptomus bacillifer ; Acanthodiaptomus denticornis
    Repository Name: AquaDocs
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  • 70
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    Selective plankton feeding by the coregonid ”bondella” (Coregonus sp.) of Lake Maggiore [Translation from: Translation from: Memorie dell'Istituto Italiano di Idrobiologia Dott.Marco de Marchi 31 181-203, 1974] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4906 | 1256 | 2011-09-29 15:44:42 | 4906 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: In recent times, some specialists have begun to study the subject of food selection of fish in an organized way, thus highlighting its importance. In the present work, the author intends to evaluate the impact of predation on the eupelagic zooplanktonic biocenosis of Lake Maggiore, producing, in this way, as far as possible, a basis for a better understanding of the population dynamics of the species of zooplankton directly involved. Another aspect which has been studied is that related to the mechanism of selective capture set in action by the predator. To this end the study tries to bear in mind that the subject should be interpreted as a function of numerous factors acting contemporaneously, that is as the interaction of characters peculiar to the predator and to the prey. The species studied, locally called ”bondella”, belongs to the family Salmonidae, subfamily Coregoninae and was introduced into Lake Maggiore in 1950.
    Description: Translated from Italian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater fish ; Predator prey interactions ; Zooplankton ; Feeding ; Freshwater crustaceans ; Lake Maggiore
    Repository Name: AquaDocs
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  • 71
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    Contributions to the knowledge of larval development in Cyclops leuckarti Claus [Translation from: Natura, Milano 19, 89-96, 1928] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4909 | 1256 | 2011-09-29 15:44:49 | 4909 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: Taxonomic observations on the larval forms of Cyclops leuckarti are being discussed and compared with Cyclops oithonoides var. hyalina. Observations include Nauplius and Metanauplius stages. The author concludes that specific differences are recognisable even in the nauplius stages.
    Description: Translated from Italian into English
    Keywords: Biology ; Limnology ; Freshwater crustaceans ; Life cycle ; Larval development ; Larvae ; Taxonomy ; Animal morphology ; Cyclops leuckarti ; Cyclops oithonoides
    Repository Name: AquaDocs
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  • 72
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    Investigations on saprolegniosis. II. Study on the process of penetrations showing evidence of a proteolytic enzyme and histopathological aspects [Translation from: Riv.ital.Piscicolt.Ittiopatol. 11(4), 109-117, 1976] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4905 | 1256 | 2011-09-29 15:44:39 | 4905 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-04
    Description: The study of enzymatic activity is of great importance in the immunology of fungi. Indeed, knowledge of biological activity of antigenic structures is important for the elucidation of host-parasite relations as well as in the search for a taxonomic factor permitting differential diagnoses. The authors used Saprolegnia cultures to analyse soluble antigenic fractions arising from the mycelium of cultures of 4 species of Saprolegnia, which are found most frequently in the parasitic state on fish: S. parasitica, S. ferax, S. delica, S. diclina. The authors conclude that in the study of saprolegniasis, the enzymatic approach affords new elements for the examination of the etiology of fungi as well as an element of gravity concerning the biochemical modifications necessary to the change of saprophytism to parasitism.
    Description: Translated from French into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater fish ; Parasitic diseases ; Fungal diseases ; Fungi ; Enzymatic activity ; Immunity
    Repository Name: AquaDocs
    Type: monograph
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  • 73
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    Experimental research on dormancy in Cyclops vicinus [Translation from: Naturwissenschaften 56 93-94, 1969] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4910 | 1256 | 2011-03-10 09:18:30 | 4910 | Freshwater Biological Association
    Details
    Publication Date: 2021-06-24
    Description: Dormancy has been observed in several species of Cyclops. Animals in dormancy are characterised by almost complete inactivity of the main appendages and sluggish intestinal peristalsis. In Cyclops vicinus dormancy can take place in copepod stages III (19%), IV (78%) and V (3%) but one and the same animal only in one developmental stage. The author gives his own results between frequency of dormancy and photoperiod (20 C, 1000 lux). He concludes that dormancy in C. vicinus can be influenced by day length and can be ended prematurely by short day length.
    Description: Translated from German into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Life cycle ; Dormancy ; Experimental research
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  • 74
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    Saprolegnia on roach (Leuciscus rutilus) and carp (Cyprinus carpio) [Translation from: Acta zool.pathol.Antverpiensia 43 107-123, 1976] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4908 | 1256 | 2011-09-29 15:44:48 | 4908 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: There is, in nature, as well as in the aquarium, a parasitic disease known as 'mousse' and which attacks predominantly fish. It is caused by Phycomycete fungi, genus Saprolegnia. The fungus causes external lesions and covers the fish with a thick white layer from whence comes the name 'mousse', commonly attributed to the disease, for which the scientific name is Saprolegnia. This article provides an overview of Saprolegnia infections on fish in nature and aquaria and then discusses symptomology of Saprolegnia in the mirror caro and t roach in more detail.
    Description: Translated from French into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater fish ; Parasites ; Parasitic diseases ; Fungal diseases ; Fungi ; Histopathology ; Aquaria ; Saprolegnia ; Cyprinus carpio ; Leuciscus rutilus
    Repository Name: AquaDocs
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  • 75
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    Flood circulation in oligomictic lakes: an undervalued reason for restriction of zooplankton production [Translation from: Memorie dell'Istituto Italiano di Idrobiologia Dott.Marco de Marchi 22 9-52, 1967] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4911 | 1256 | 2011-09-29 15:45:08 | 4911 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: Dormancy has been observed in several species of Cyclops. Animals in dormancy are characterised by almost complete inactivity of the main appendages and sluggish intestinal peristalsis. In Cyclops vicinus dormancy can take place in copepod stages III (19%), IV (78%) and V (3%) but one and the same animal only in one developmental stage. The author gives his own results between frequency of dormancy and photoperiod (20 C, 1000 lux). He concludes that dormancy in C. vicinus can be influenced by day length and can be ended prematurely by short day length.
    Description: Translated from Italian into English
    Keywords: Biology ; Ecology ; Limnology ; Zooplankton ; Freshwater crustaceans ; Freshwater lakes ; Biological surveys ; Lake dynamics ; Mixodiaptomus laciniatus ; Cyclops abyssorum ; Lake Maggiore
    Repository Name: AquaDocs
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  • 76
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    Respiration and the efficiency of energy during embryonic development of Asellus aquaticus L. (Crustacea) [Translation from: Vestsi Akademii Navuk Belorusskoi SSR, Seriya Biyal. 1978(5) 112-114, 1978] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4914 | 1256 | 2011-09-29 15:45:22 | 4914 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: Experimental studies were carried out on the transformation of matter and energy during embryonic development of the isopod Crustacea Asellus aquaticus L. under two constant temperatures. Material for the experiments was collected in the quarry lakes of the Kurasovshchin-zone (city-Minsk) at 9°C in April and at 18°C in June, 1977. The rate of consumption of oxygen per specimen by eggs and embryos of Asellus aquaticus was observed and dynamics of the basic biological characteristics during embryonic development studied.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Embryonic development ; Temperature effects ; Oxygen consumption ; Asellus aquaticus
    Repository Name: AquaDocs
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  • 77
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    Histochemical data on the skin mucous cells during the development of the trout [Translation from: Bollettino della Societa Italiana di Biologia Sperimentale 45, 1273-1276, 1969] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4912 | 1256 | 2011-09-29 15:45:10 | 4912 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: In the skin of Salmo irideus the production of mucus is due to one type of cell specialized as a mucus cell. The histochemical research presented in this paper describes the mucous cells of Salmo irideus and demonstrates observable variation in such cells during the fish's development.
    Description: Translated from Italian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater fish ; Mucus ; Histochemistry ; Developmental stages ; Salmo irideus
    Repository Name: AquaDocs
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  • 78
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    Epidermis differentiation in Salmo irideus Gilb. development [Translation from: Archo ital.Anat.Embriol. 76, 19-30, 1971] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4917 | 1256 | 2011-09-29 15:45:37 | 4917 | Freshwater Biological Association
    Details
    Publication Date: 2021-06-24
    Description: Recent histochemical and histophysiological research on the skin of fish has posed interesting problems both with regard to the presence of specialized types of cell and with regard to the function of this organ. The present paper intends to study the development and the functional differentiation of the trout's skin, both from the histomorphological and the histochemical point of view. The skin of Salmonids is devoid of specialized cells; the granular cells of Petromyzonti, the serous cells of Selacii and the clavate cells described in many other teleosts and it lacks keratin. As such it can be considered a good working model which can be used to show the eventual histomorphological and histochemical changes occurring both in the transformation from the endovular to the aqueous environment. Histomorphological observations were carried out demonstrate the great structural simplicity of the trout's skin at all stages. The article concludes that glycogen increases greatly when the epidermis thickens and therefore when it becomes necessary to guarantee resistance, amongst which is a support mechanism.
    Description: Translated from Italian into English
    Keywords: Biology ; Limnology ; Freshwater fish ; Histochemistry ; Developmental stages ; Histology ; Skin ; Salmo irideus
    Repository Name: AquaDocs
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  • 79
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    On the formation of ephippia in some Cladocera (Crustacea) [Translation from: Zoologicheskie Zhurnal 61, 1425-1427, 1982] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4918 | 1256 | 2011-09-29 15:45:41 | 4918 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: The determination of relative connections between families and genera of Cladocera, necessary for the construction of their natural systems, must be based on various criteria, among them on the structure of the ephippia. Of particular interest is the study of the process of formation and structure of the ephippium in Macrothricidae, different representatives of which differ significantly among themselves according to this criterion. In this article are presented the results of an investigation of the features of formation of the ephippium in seven species of Macrothricidae and in the moinid Moina weismanni Ishikawa (Moinidae).
    Description: Translated from Russian into English
    Keywords: Biology ; Limnology ; Freshwater crustaceans ; Insect eggs ; Histology ; Macrothricidae ; Moina weismanni
    Repository Name: AquaDocs
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  • 80
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    A contribution to the knowledge of the skin albuminose cells of Torpedo ocellata Raf [Riv.Istochim.norm.pat. 8 411-416, 1962] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4916 | 1256 | 2011-09-29 15:45:32 | 4916 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: Glandular cells, other than the mucous cells, have been described in the skin of various groups of fish (Teleosts, Ganoids, Selachii) and they have been called 'albuminose' by various authors. The authors propose to study the albuminose cells in the skin of Torpedo ocellata Raf. from a histochemical point of view. The albuminose cells have a complex morphological structure and a correspondingly complicated histochemical make-up. One must treat them as an example of cell with secretions of a particular type, which must and will be better incorporated when more is known of characteristics existent in other species.
    Description: Translated from Italian into English
    Keywords: Biology ; Limnology ; Freshwater fish ; Skin ; Histochemistry ; Animal morphology ; Secretion ; Torpedo ocellata
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  • 81
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    The influence of constant temperature on the embryonic growth of Asellus aquaticus L. (Crustacea) [Translation from: Vestsi Akademii Navuk Belorusskoi SSR, Seriya Biyal. 1979(1) 128-130] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4913 | 1256 | 2011-09-29 15:45:19 | 4913 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: It is known that an adequately large amount of work has been devoted to investigations on the influence of temperature on the growth period of aquatic invertebrates. However, the action of the given factors on the basic biological characteristics of embryonic growth in crustaceans is virtually unknown. An experimental study of the effectiveness of the transformation of matter and energy during the period of embryogenesis in the isopod Asellus aquaticus L. under different constant temperatures was carried out. Specimens were collected in the quarry lakes of the Kurasovshchin zone (city-Minsk). The authors developed a quantitative analysis of the basic energetic properties of animals during one of the physiological stages at different constant temperatures, which allows one to determine the temperature range in which the expenditure of energy, at a given instance during embryonic growth, is minimised. For A. aquaticus this range is represented by the limits 10-22°C, during which the least expenditure of energy is observed between 14.5 and 18.8°C.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Embryonic development ; Embryos ; Temperature effects ; Asellus aquaticus
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  • 82
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    On the toxicity of some pesticides for fish [Translation from: Izv.gos.nauchno-issled.Inst.ozern.rybn.Khoz. 121, 95-96, 1977] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4960 | 1256 | 2011-09-29 15:39:16 | 4960 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: In the piscicide laboratory of GosNIORKh over a series of years was carried out the ichthyological evaluation of different agricultural pesticides, used both in our country and abroad. In all more than 300 different chemical substances were tested. Here, it was established that around 10% of them possessed high ichthyotoxic properties. Experiments were conducted under laboratory conditions on aquarium fish in groups, and also on representatives of different species of lake ichthyofauna. The basic criterion of evaluation of toxicity was the death of experimental fish during 120 hours. This short paper summarises the findings of this reasearch and offers a table presenting acute toxicity of pesticides for fish.
    Description: Translated from Russian into English
    Keywords: Biology ; Fisheries ; Limnology ; Agricultural pollution ; Ichthyocides ; Freshwater fish ; Toxicity tests ; Experimental research
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  • 83
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    Nitrification in marine ecosystems [Translation from: Rapp.Naturvardsverket SNVPM No.1213, 157-166, 1980] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4964 | 1256 | 2011-09-29 15:39:04 | 4964 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: The nitrification in the ocean is influenced by several environmental factors and the importance of these is more or less known. There are very likely many more to be discovered in the study of the interaction of nitrification bacteria and other micro-organisms in the ocean. Some of the factors to be considered will briefly be dealt with in this paper. Then the authors give the results of an incubation experiment in the Baltic Sea and from a detailed study in Gullmarn.
    Description: Translated from Swedish into English
    Keywords: Chemistry ; Ecology ; Oceanography ; Marine ecology ; Nitrification ; Experimental research ; Sediment analysis ; Bacteria ; Carbon fixation ; Nitrosococcus oceanus ; Nitrococcus mobilis
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  • 84
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    A study of the reproductive biology of dace in the middle Ob [introduction , summary and table captions only] [Translation from: Trudy tomsk. gos. Univ. 125, pp.77-91] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4971 | 1256 | 2011-09-29 15:37:19 | 4971 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: The Siberian Dace (Leuciscus leuciscus baicalensis (Dyb)is an important trade fish in Siberian waters. In the Ob basin more than 30,000 centners are produced annually. Catches of dace fluctuate significantly both between different rivers and between years in the Tomsk region. Defining the stocks of dace in the waters of the Tomsk region and explaining the fluctuations over time seems to be a very important and relevant question for the workers of the fishing industry. An answer, however, requires an accurate knowledge of the biology of dace; its reproductive, feeding and migration habits and the conditions of wintering etc. In the following we examine one of the above questions i.e. the biology of the reproduction of dace. The study was carried out in the Middle Ob in May 1951. This tranlations provides the introduction, summary and table captions only of the original article.
    Description: Translated from Russian into English
    Keywords: Biology ; Fisheries ; Limnology ; Freshwater fish ; Reproduction ; Stock assessment ; Fecundity ; Russia ; Leuciscus baicalensis
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  • 85
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    Observations on the downstream movements of brown trout fry (Salmo trutta L.)in the Lissuraga [Translation from: Bulletin Francais de la Pisciculture No.274 1-17, 1979] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4966 | 1256 | 2011-09-29 15:36:50 | 4966 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: The phenomenon of the downstream movement of brown trout fry has been noticed for a very long time by fish biologists. The work presented here, and taking place in the framework of the hydrobiological research of the INRA, represents the results of three years' observation of the movement downstream in the Lissuraga, a small stream in the French Basque country, in connection with certain environmental factors, which are shown. The authors have used a live experiment to compare, in an artificial stream, the ”descending” (or ”Nomadic”) fry with the ”resident” fry, caught by electric fishing in other parts of the stream.
    Description: Translated from Swedish into English
    Keywords: Ecology ; Fisheries ; Limnology ; Freshwater fish ; Rivers ; Fry ; Trap nets ; Spawning migrations
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  • 86
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    Modulation of the effectiveness of 17-alpha-hydroxy-20-beta-dihydroprogesterone or of a gonadotrophic extract on the in vitro intrafollicular maturation of oocytes of the rainbow trout Salmo gairdnerii by various non-maturing steroids [Translation from: Compte Rendu Hebdomadaire des Seances de l'Academie des Sciences, Paris, Series D 281, 811-814, 1975] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4968 | 1256 | 2011-09-29 15:36:54 | 4968 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: The effectiveness of 17 α-hydroxy-20 β-dihydroprogesterone (17 α-20 β Pg) or of a trout hypophyseal gonadotrophic extract on the in vitro intrafollicular maturation of trout oocytes can be modulated by steroids which do not have a direct maturing effect; the effectiveness of the gonadotrophic extract is lowered by oestradiol and oestrone and increased by testosterone. As these steroids have no significant effect on maturation induced by 17 α-20 β Pg, the site of their activity is probably in the follicular envelopes. Corticosteroids, and Cortisol and cortisone in particular increase the effectiveness of the gonadotrophic extract, but increase the effectiveness of 17 α-20 β Pg even more strongly, suggesting that this 'progestagen' has a direct effect on oocyte sensitivity.
    Description: Translated from French into English
    Keywords: Biology ; Limnology ; Freshwater fish ; Oocytes ; Sexual maturity ; Hormones ; Steroids ; Incubation ; Heteropneustes fossilis ; Salmo gairdnerii
    Repository Name: AquaDocs
    Type: monograph
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  • 87
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    Ratio of natural isotopes of nitrogen. I. Primary results: soils of Dombes [Translation from: Revue d'Ecologie et de Biologie du Sol 14, 279-287, 1977] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4967 | 1256 | 2011-09-29 15:36:52 | 4967 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: Utilization of the heavy isotope of nitrogen as a tracer has found numerous applications in soil biology. It allows better definition of different stages of the nitrogen cycle, in particular the immobilization-mineralization cycle. In this work, the authors report the results of calculations of natural isotope ratios of nitrogen in samples of water, soil and vegetation prevailing in Dombes and discuss the possibilities of errors and coefficients of fractionation.
    Description: Translated from French into English
    Keywords: Chemistry ; Ecology ; Limnology ; Nitrogen isotopes ; Soils ; Tracers ; Bacteria ; Nitrogen compounds ; France ; Dombes
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    Type: monograph
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  • 88
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    Experiments on the production of a highly dispersible calcium carbonate. ('Experimental section' only) [Translation from: Szklo i Ceramiki 30, 133-136, 1979] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4963 | 1256 | 2011-09-29 15:39:01 | 4963 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: This short translation summarises experiments on the production of a highly dispersible precipitate of calcium carbonate. The translation covers the 'Experimental section' (of the original larger paper) only.
    Description: Translated from Polish into English
    Keywords: Chemistry ; Limnology ; Experimental research ; Calcium carbonates ; Magnetic fields ; Ultrasonic devices
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  • 89
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    Rearing cyprinid fry in cages [conclusions only] [Translation from: Gospodarka rybna, Warszawa 27(8/9) 3-5, 1975] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4970 | 1256 | 2011-09-29 15:36:56 | 4970 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: This short translation presents the conclusions only of a study of the proposed method of rearing cyprinid fry in cages and how this method can increase the amount of material produced of the stocked fry.
    Description: Translated from Polish into English
    Keywords: Biology ; Fisheries ; Limnology ; Freshwater fish ; Fry ; Cage culture ; Fish culture ; Cyprinidae ; Poland
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    Type: monograph
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  • 90
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    The role of infusoria and bacteria as food for Cyclopoida in Rybinsk Reservoir [Translation from: Trudy Instituta Biologii Vnutrennykh Vodnany 22(25), 37-42, 1971] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4975 | 1256 | 2011-09-29 15:37:31 | 4975 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: Despite the fact that it is a long time sinc e the methods of collection and quantitative estimatio n of protozoa were worked out data on the abundance of these animals in freshwaters are not very numerous. Nevertheless, Infusoria and Rhizopoda at high densities are widespread in the water and sediments of lakes and reservoirs. In order to find ou t the importance of infusoria as a food source for cyclopoids we carried out experimental investigations using C14. For this three species of cyclopoids, widely distributed in open regions of Rybinsk reservoir were selected: Cyclops vicinus, Mesocyclops oithonoides and Kesocyclops leuckarti. The data presented give evidence that the species investigated are able as predators to consume infusorian plankton arid bacteria in the form of flocs or small clumps of detritus.
    Description: Translated from Russian into English
    Keywords: Ecology ; Limnology ; Freshwater lakes ; Freshwater crustaceans ; Feeding experiments ; Bacteria ; Feeding ; Russia ; Cyclops vicinus ; Mesocyclops oithonoides ; Kesocyclops leuckarti
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  • 91
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    Chemical composition of Iraq water resources (abbreviated translation) [Translation from: Vodnye Resursy 1975(4,) 173-185] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4988 | 1256 | 2011-09-29 15:36:31 | 4988 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: This abbreviated translation summarises the chemical composition of Iraq water resources. Among the described water bodies are the River Euphrates, Shatt al Arab River and a number of standing waters.
    Description: Translated from Russian into English
    Keywords: Chemistry ; Ecology ; Limnology ; Inland water environment ; Inland waters ; Water analysis ; Iraq
    Repository Name: AquaDocs
    Type: monograph
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  • 92
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    Mechanism of mass transfer in the formation of hydrothermal deposits of sulphides [Translation from: Trudy Inst.Geol.rudn.Mesterozh. 16, 80 [pages 44-46 ”Solubility of sulphides of iron” only], 1958] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4980 | 1256 | 2011-09-29 15:38:06 | 4980 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: This partial translation of the original paper provides the summary of this study of the mechanism of mass transfer in the formation of hydrothermal deposits of sulphides. For determining the solubility of sulphides of iron, the radioactive isotope Fe59 was used. The solubility of two sulphides was determined.
    Description: Translated from Russian into English
    Keywords: Chemistry ; Ecology ; Limnology ; Sulphide deposits ; Sulphides ; Hydrothermal deposits ; Iron isotopes ; Solubility
    Repository Name: AquaDocs
    Type: monograph
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  • 93
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    Influence of aniline on Daphnia magna Straus [Translation from: Trudy Saratov.Otdeleniya GosNIORKh 13 102-104, 1975] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4985 | 1256 | 2011-09-29 15:38:34 | 4985 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: Experiments were carried out by the method of direct effect of the tested substance on increase of biomass (1,2). Daphnia magna was cultured under laboratory conditions.The author concludes that concentrations of aniline from 5000 to 0.1 mg/1 appear acutely lethal. The disturbance of feeding, reproduction, the disorganization of the nervous system, speak of the toxicity of the substance.
    Description: Translated from Russian into English
    Keywords: Biology ; Limnology ; Organic compounds ; Toxicity ; Toxicity tests ; Zooplankton ; Freshwater crustaceans ; Daphnia magna
    Repository Name: AquaDocs
    Type: monograph
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  • 94
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    Feeding of Gammarus lacustris Sars under different conditions of habitation [Translation from: [Trophic relations of freshwater invertebrates.] (ed. G. G. Vinberg) pp.94-98. Leningrad, Zool.Inst.AN SSSR, 1980] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4984 | 1256 | 2011-09-29 15:38:32 | 4984 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: The amphipod Gammarus lacustris, a regular representative of lacustrine communities, often plays a significant role in the transformation of matter and energy. The object of the present work was to clarify the quantitative side of the feeding of the amphipod under different conditions of habitation. Experimental works on determination of the rate of consumption of food and its dependence on body-weight were carried out in the summer periods 1975-1978 on three water-bodies of the Krasnoyarsk region, of different conditions of habitation for the amphipods.
    Description: Translated from Russian into English
    Keywords: Aquaculture ; Biology ; Limnology ; Freshwater crustaceans ; Feeding ; Feeding experiments ; Body weight ; Zooplankton ; Russia ; Krasnoyarsk
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  • 95
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    Review of investigation on the feeding of the European grayling [Translation from: Flora Slodkowodna Polski. Tom 2. Cyanophyta, Glaucophyta (ed. K. Starmach) p350-352. Warsaw, Polska Academia Nauk, 1966] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4987 | 1256 | 2011-09-29 15:36:22 | 4987 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: The composition of the food of the European grayling and the character of its feeding has been studied fully enough, but this knowledge is scattered in the literature and often contradictory. rare exceptions, analysis of the results of different investigations. Therefore the proposed short outline of the history of the study of the problem with a description of the basic data on the feeding of the grayling in different geographical areas is presented as expedient and opportune, primarily in relation to the determination of immediate problems and the trend of research.
    Description: Translated from Russian into English
    Keywords: Biology ; Limnology ; Freshwater fish ; Literature reviews ; Food composition ; Thymallus thymallus
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  • 96
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    Avoided temperatures by young fish [Translation from: Informatsionnyi Byulleten Biologiya Vnutrennikh Vod No.50, 45-47, 1981] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4992 | 1256 | 2011-09-29 15:36:19 | 4992 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: Directed local changes of water temperature for the purpose of controlling the behaviour of fish are based on the knowledge of the characteristics of seasonal-age dynamics of their thermoadaptation possibilities. These possibilities are still inadequately studied especially in relation to avoided temperatures. By the authors the attempt was made to determine zones of avoided temperatures for the young of five species of fish (bream, roach, blue bream, perch, peled) in the summer period of the year, and also to assess the influence on them of additional factors, in particular mechanical driving. In parallel in two-fold repetition were conducted experiments on the determination of selected, shock and lethal temperatures of these fish. Experiments were conducted with fish, caught in the littoral of the Rybinsk reservoir.
    Description: Translated from Russian into English
    Keywords: Ecology ; Fisheries ; Limnology ; Freshwater fish ; Temperature tolerance ; Avoidance reactions ; Russia
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  • 97
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    Influence of starvation on selected temperatures in the young of bream, roach and perch [Translation from: Informatsionnyi Byulleten Biologiya Vnutrennikh Vod No.50, 45-47, 1981] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4993 | 1256 | 2011-09-29 15:35:50 | 4993 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: Works devoted to the influence of starvation on temperature selection by fishes are few and their conclusions are contradictory. This study determined the influence of brief, up to 14 days, starvation on temperature selection by young fishes. The experiments were carried out in August-September 1976 on fingerling bream (Abramis brama L.), roach (Rutilus rutilus L.) and perch (Perca fluviatilis L.) with body lengths of 3-5 cm and weight 0.5-1.2 g. The young fish were caught in the littoral by seine-nets or small drag-nets. Immediately after catching the fish they were put in acclimatization boxes. The period of acclimatization did not exceed 2 days for bream and roach at a temperature of 20 °C and 6 days for perch at 17 °C. Before the start of the experiment and for the first 10 days of the experiment the fish were fed with oligochaetes, earthworms and daphnia, after that feeding discontinued. At the end of a 10-14 day period the giving of food was resumed. The study concludes that the experiments have shown that in the summer season the factor of starvation significantly changes the reaction to the gradient of temperature in young cyprihids - roach and bream.
    Description: Translated from Russian into English
    Keywords: Ecology ; Fisheries ; Limnology ; Freshwater fish ; Temperature tolerance ; Starvation ; Fingerlings ; Feeding experiments ; Abramis brama ; Rutilus rutilus ; Perca fluviatilis
    Repository Name: AquaDocs
    Type: monograph
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  • 98
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    The life capacity of copepod's eggs passed through the gut of Ladoga lake Coregonus [Translation from: Zool.Journal.Moscow 29-5, 476-477, 1950] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/5023 | 1256 | 2011-09-29 15:32:39 | 5023 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-08
    Description: This short paper summarises findings of experiments that were carried out using copepod eggs taken from guts of Coregonus which breeds in various Ural lakes. The study showed that copepod eggs can pass through the gut of Coregonus unharmed.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater fish ; Freshwater crustaceans ; Dispersants ; Dispersion ; Ladoga Lake ; Coregonus ; Cyclops vindis
    Repository Name: AquaDocs
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  • 99
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    The periodicity in the consumption of oxygen in Asellus aquaticus [Translation from: Vestnik ceskoslovenske zoologicke Spolecnosti, 15, 1, 89-97, 1951] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/5024 | 1256 | 2011-09-29 15:32:41 | 5024 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-08
    Description: The consumption of oxygen in Asellus aquaticus was measured to find if there existed a periodicity in the consumption of oxygen and how this showed itself during the course of the day, year and in various experimental conditions. From the figures obtained comparative values were calculated and from these curves were plotted of the changes in the consumption of oxygen during the day and year.
    Description: Translated from Russian into English
    Keywords: Biology ; Limnology ; Freshwater crustaceans ; Periodicity ; Seasonal variations ; Oxygen consumption ; Asellus aquaticus
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  • 100
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    Factors influencing the start of development in Daphnia pulex winter eggs [Translation from: Biological Reviews Vol. 13, 24-26, 1951] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/5030 | 1256 | 2011-09-29 15:31:52 | 5030 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-08
    Description: The winter eggs of Daphnia pulex, after passing safely through the winter , develop and hatch in the spring, multiplying by themselves, while some males emerging among them with the changes in environment produce fertile eggs, which are universally known as winter eggs . This study researches the factors governing the development of winter eggs through experiments.
    Description: Translated from Japanese into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater crustaceans ; Resting stages ; Temperature effects ; Daphnia pulex
    Repository Name: AquaDocs
    Type: monograph
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