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  • Limnology  (490)
  • Cell & Developmental Biology
  • General Chemistry
  • LUNAR AND PLANETARY EXPLORATION
  • Freshwater Biological Association  (341)
  • Environment Agency North West  (75)
  • Cornwall, UK  (29)
  • Gainesville, FL  (25)
  • Carlisle, UK  (20)
Collection
Keywords
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  • 101
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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
    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 fish ; Histochemistry ; Histology ; Fish larvae ; Cells ; Lampetra planeri ; Petromyzon marinus
    Repository Name: AquaDocs
    Type: monograph
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  • 102
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    On methods of evaluation of bacterial production. [Translation from: Lietuvas TSR Mokslu Akademijos Darbai, C Serija 2(55) 3-9, 1971.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4812 | 1256 | 2011-09-29 15:51:26 | 4812 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: By now a great deal of work is known concerning the methods of determining the production of bacteria or similar questions; among these the problems of a common terminology is discussed. The article discusses formulae of production of bacterial populations over time.
    Description: Translated into English
    Keywords: Biology ; Limnology ; Bacteria ; Population number ; Formulae ; Terminology
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  • 103
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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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  • 104
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    Application of diatom analysis for the study of the history of the lakes of north-west USSR. [Translation from: Istoriya Ozer; Trudy Vses.Simp.Vilnius p1-7. Vilnius, 1970.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4808 | 1256 | 2011-09-29 15:52:42 | 4808 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: During late - and post-glacial times lakes played a leading role in the development of the landscape of the North-west European part of USSR. A variety of geographic circumstances created great variegation of natural conditions in lakes and determined the composition of their diatoms. The basic stages of the development of the diatom flora of lakes are linked with general climatic changes. The deepwater regions of large periglacial lakes of the North-west USSR are inhabited by plankton diatoms of the genera Melosira and Cyclotella. Diatom analysis is further applied for the study of the history of the lakes of north-west USSR.
    Description: Translated from German into English
    Keywords: Biology ; Ecology ; Limnology ; Diatoms ; Freshwater lakes ; Glacial lakes ; Palaeolimnology ; Sediment analysis
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  • 105
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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
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  • 106
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    On drift and diel vertical migration of bottom invertebrates of the Amur. [Translation from: Zoologicheskie Zhurnal 42 1601-1612, 1963.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4817 | 1256 | 2011-09-29 15:51:19 | 4817 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: Planktobenthos was sampled in 1957-58 in the river Amur. A determination of the kind of organisms drifting in the mass of water of the Amur was carried out. Of special interest for the authors was the activity of drifting of benthic larvae.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Rivers ; Benthos ; Benthic currents ; Invertebrate larvae ; Biological drift ; Vertical migrations ; Amur River ; Ephemeroptera
    Repository Name: AquaDocs
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  • 107
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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
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    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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  • 108
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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
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    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
    Repository Name: AquaDocs
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  • 109
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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
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    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
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  • 110
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    Some aspects of the ecology of the limnoplankton, with special reference to the phytoplankton. [Translation from: Svensk Botanisk Tidskrift 13(2) 129-163, 1919.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4819 | 1256 | 2011-09-29 15:51:22 | 4819 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: This paper tries to develop more generally some fundamental bases for the ecological study of freshwater plankton. A special attention is given to the phytoplankton associations which can be separated out and made into groups according to their dependence upon changing environments. Plankton formations in different types of water bodies (ponds, lakes and rivers) are studied.
    Description: Translated from Swedish into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater ecology ; Rivers ; Ponds ; Freshwater lakes ; Phytoplankton ; Planktonology
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  • 111
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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
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    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
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  • 112
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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
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    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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  • 113
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    Key to the larvae of the genera of the sub-family Orthocladiinae from Larvae and Pupae of midges of the sub-family Orthocladiinae of the fauna of the USSR. [Translation from: Larvae and pupae of midges of the subfamily Orthocladiinae of the fauna of the USSR (Diptera, Chironomidae = Tendipedidae) (ed. Pankratova V.Ya.), 51-55. Leningrad, Nauka, 1970. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4829 | 1256 | 2011-09-29 15:50:58 | 4829 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: A key to the larvae of the genera of the sub-family Orthocladiinae from Larvae and Pupae of midges of the sub-family Orthocladiinae. Parts of the key refer to the rest of the publication which is not included in this partial translation.
    Description: Translated from Russian into English
    Keywords: Biology ; Limnology ; Insect larvae ; Identification keys ; Pupae ; Orthocladiinae
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  • 114
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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
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    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
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  • 115
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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
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    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
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  • 116
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    Evidence of algae in the excrement of ducks. [Translation from: Hydrobiologia 1 22-27, 1948. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4830 | 1256 | 2011-09-29 15:50:24 | 4830 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: In the extremely severe winter of 1946-47 the surface of the Pfaffikersee (near Zurich) lay under an unbroken seal of ice for a full three months. The number of wild ducks resting in this location was estimated to be about 400. Six samples of excrements of ducks were microscopically analysed and fragments of algae were identified. These analyses allow the expert to specify with definite certainty the feeding areas under investigation of the studied birds.
    Description: Translated from German into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater lakes ; Aquatic birds ; Algae ; Digestion ; Faecal pellets ; Anatidae
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  • 117
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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
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    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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  • 118
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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
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    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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  • 119
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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
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    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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  • 120
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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
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    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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  • 121
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    The diatoms of Longans lake-vegetation. Fossil diatom flora. [Translation from: Acta Phytogeographica Suecica 36 73-86, 1955. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4834 | 1256 | 2011-09-29 15:50:21 | 4834 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: Sediment samples were taken from Lake Langans in Sweden and fossilised diatoms analysed. Sample methods and environmental factors are discussed. Species with a characteristic occurrence are described. The article discusses diatom-thanatocoenoses as indicators of environment.
    Description: Translated from Swedish into English
    Keywords: Biology ; Ecology ; Limnology ; Diatoms ; Check lists ; Sediment analysis ; Fossil diatoms ; Methodology ; Sweden
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  • 122
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    'Fa Tsai', a Chinese edible Nostoc in market. [Translation from: Bulletin of the Japanese Society of Phycology 8 124-126, 1960. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4837 | 1256 | 2011-09-29 15:50:12 | 4837 | Freshwater Biological Association
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    Publication Date: 2021-07-06
    Description: The Nostoc 'Fa Tsai' is sometimes seen in Chinese cooking materials stores. It is investigated what 'Fa Tsai' consists of and where it originates.
    Description: Translated from Japanese into English
    Keywords: Biology ; Limnology ; Sociology ; Algae ; Food composition ; Sociological aspects
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  • 123
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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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  • 124
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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
    Repository Name: AquaDocs
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  • 125
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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
    Repository Name: AquaDocs
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  • 126
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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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  • 127
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    Keys to the larvae of the species of the genera Diamesa, Eukiefferiella, Orthocladius, Cricotopus, Psectrocladius and Chaetocladius. [Translation from: Larvae and pupae of midges of the subfamily Orthocladiinae of the fauna of the USSR (Diptera, Chironomidae = Tendipedidae) (ed. V.Y. Pankratova) p76-8,151-152,173-174,188-189. Leningrad, Nauka, 1970. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4840 | 1256 | 2011-09-29 15:49:50 | 4840 | 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 Russian into English
    Keywords: Biology ; Limnology ; Identification keys ; Invertebrate larvae ; Freshwater organisms
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  • 128
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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
    Repository Name: AquaDocs
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  • 129
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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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  • 130
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    Determination of the activity of nitrifying bacteria in surface waters by a modified BOD-test. [Translation from: Zentbl.Bakt.Parasitkde 156(1) 414-421, 1972. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4844 | 1256 | 2011-09-29 15:49:32 | 4844 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: A modified method of the Biochemical oxygen demand (BOD)test was applied in order to find out the seasonal changing activity of the nitrifying bacteria in surface waters. Samples were taken from the River Elbe near Teufelsbrueck.
    Description: Translated from German into English
    Keywords: Ecology ; Limnology ; Experimental research ; Dissolved oxygen ; Analytical techniques ; Water analysis ; Nitrification ; Bacteria ; Surface water
    Repository Name: AquaDocs
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  • 131
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    On distribution of pollen in lakes. [Translation from: Palynology in geological research in the Baltic Soviet Republics p113-119. Vilnius, 1973.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4836 | 1256 | 2011-09-29 15:50:10 | 4836 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: Systematic investigations of the distribution of pollen in stationary water bodies until now have hardly been conducted. For clarification of the problem of how the pollen of different plants which falls into a lake is deposited in relation to its physical properties, the character of the lake, wind currents and other factors, pollen analyses were carried out of surface samples of the bottom sediments of 13 Lithuanian lakes. Lakes were selected of different sizes (areas from 2333 ha. to 8 ha.) and different depths, not uniformly overgrown, situated in different physico-geographic regions of Lithuania. As a result of the investigation, it was established that in the surface layer of the sediments of the lakes of Lithuania pollen of woody species predominates.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater lakes ; Pollen ; Ecological distribution ; Sediment analysis ; Lithuania ; Shamukas Lake
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  • 132
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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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  • 133
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    Special carbon requirement of Spirulina platensis culture. [Translation from: Materialy VII Vsesoyuznogo Rabochego Soveshchanii po Voprosu Krugovorota Veshchestv v Zamknutoi Sisteme na Osnove Zhiznedeyatel'nosti Nizshikh Organizmov p55-57. Kiev, Naukova Dumka, 1972.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4847 | 1256 | 2011-09-29 15:49:20 | 4847 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: By the industrial cultivation of blue-green algae, there very much appears the important question about their carbon nutrition. Spirulina grows within the range of pH value of medium of 8.5 - 11.0. In this range of pH value in the culture medium CO2 is present in the form of bicarbonate and carbonate, which serves as principal source of carbon for the present type of algae. There is little information yet about the influence of the pH of the medium, and the form of carbon components of the medium, on the rate-increase of Spirulina. Investigations were conducted into the influence of some pH values of medium on the rate-increase of the alga Spirulina platensis.
    Description: Translated from German into English
    Keywords: Biology ; Limnology ; Algae ; Carbon ; pH effects ; Algal culture ; Photosynthesis
    Repository Name: AquaDocs
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  • 134
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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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  • 135
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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
    Repository Name: AquaDocs
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  • 136
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    Waterfowl and their role in lake ecosystems. [Translation from: Wiadomosci Ekologiczne 19, 355-371, 1973.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4851 | 1256 | 2011-09-29 15:48:51 | 4851 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: We know very little about the role of birds in different ecosystems, despite numerous interesting works of researchers and amateur ornithologist scattered throughout the world. Less attention is paid to freshwater ecosystems because of the difficulties encountered in the experimental methods as well as a lack of interest on behalf of hydrobiologists, for the activities of birds in these ecosystems. This article summarises types and morphoecological forms of waterfowl and their place in the lake ecosystem.
    Description: Translated from Polish into English
    Keywords: Ecology ; Limnology ; Aquatic birds ; Freshwater lakes ; Freshwater ecology ; Habitat selection
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  • 137
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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
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  • 138
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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
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  • 139
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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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  • 140
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    Family: Cladophora Kutzing 1843. identification key. [ Translation from: Flora Slodkowodna Polski 10, 227-263, 1972.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4858 | 1256 | 2011-09-29 15:48:29 | 4858 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: A description of the algal genus Cladophora from Vol 10 of the ”Freshwater Flora of Poland”. Illustrations are included.
    Description: Translated from Polish into English
    Keywords: Biology ; Limnology ; Algae ; Identification keys ; Taxonomy ; Cladophora
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  • 141
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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
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    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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  • 142
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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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  • 143
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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
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    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
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  • 144
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    Studies on heterotrophic nitrification in a lake. [Translation from: Z.allg.Mikrobiol. 12 567-574, 1973. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4850 | 1256 | 2011-09-29 15:48:48 | 4850 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: In a lake the nitrogen compounds are liable to regular cycling in which nitrate is reduced and ammonium oxidised. As a nitrate maximum is regularly established in the upper part of the hypolimnion of a stratified summer lake, the authors have dealt in particular with the oxidising side of the nitrogen cycle. Described here are partial results of the nitrification in Plusssee. The Plusssee was chosen, since it is almost entirely without inflows, and, lying in a wooded basin, is well protected from the wind, and therefore stably stratified. In order to determine the number of autotrophic nitrificants the distribution of the Nitrosomonas and Nitrobacter spores in the lake were analysed. From the estimates on the determination of spore numbers of the heterotrophic nitrificants, 14 species in the pure culture were isolated and examined from morphological, biochemical and taxonomic viewpoints.
    Description: Translated from German into English
    Keywords: Ecology ; Limnology ; Bacteria ; Ammonia ; Freshwater lakes ; Nitrification ; Nitrogen cycle
    Repository Name: AquaDocs
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  • 145
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    Anabaena circinalis Rabenhorst and A.flos aquae Brebisson, ex Bornet et Flahault. [Translation from: Flora Slodkowodna Polski 2, 499-504, 1966. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4859 | 1256 | 2011-09-29 15:48:31 | 4859 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: A description of the cyanobacteriae Anabaena circinalis Rabenhorst and Anabaena flos aquae Brebisson, ex Bornet et Flanault is given. Illustrations are included.
    Description: Translated from Polish into English
    Keywords: Biology ; Limnology ; Algae ; Identification keys ; Taxonomy
    Repository Name: AquaDocs
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  • 146
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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
    Repository Name: AquaDocs
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  • 147
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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
    Repository Name: AquaDocs
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  • 148
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    Some biological features of Saprolegnia parasitica Coker - cause of fish dermatomycosis. [Translation from: Pervaya nauchnaya konferentsiya molodykh Uchenykh Biologov (Tezisy Dokladov) pp.84-86. Kiev, A.N.Ukr. SSR., 1964] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4871 | 1256 | 2011-09-29 15:47:21 | 4871 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: Parasitic and infectious diseases of fish, of wide distribution in fish-rearing ponds, retard to a significant extent the development of fish culture in the Ukraine. One of the diseases of fish attracting attention in connection with the general distribution of its causative agent, the fungus Saprolegnia parasitica Coker, in water-bodies of various types, appears to be dermatomycosis. The aim of this investigation is to study the conditions favouring the development of S. parasitica. Among the studied factors were water temperature and oxygen content.
    Description: Translated from Russian into English
    Keywords: Biology ; Fisheries ; Limnology ; Fungal diseases ; Fungi ; Fish diseases ; Fish ponds ; Water temperature
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  • 149
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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
    Repository Name: AquaDocs
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  • 150
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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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  • 151
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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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  • 152
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    Application of algal bioassays in the determination of eutrophic power of waste water (”Conclusions” only) [Translation from: 1g.Sanita pubbl. 31 257-267, 1975] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4880 | 1256 | 2011-09-29 15:47:01 | 4880 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: The best evidence for establishing the level of eutrophy of a water-body is its algal production which makes it possible to identify the type and the intensity of the eutrophication according to the kind and number of algal species present: when the number of algae exceeds half a million per litre then one speaks o an ”algal bloom”. The scope of the present research aims to verify if the alga Selenastrum capricornutum can be used as a test alga under our culture conditions and to determine the eutrophic level of the secondary effluent of a modern plant for the treatment of domestic discharge and to investigate the eventual ”limiting factors”. Finally this paper aims to study the effect on the secondary effluent of tertiary treatment carried out artificially in the laboratory.
    Description: Translated from Italian into English
    Keywords: Biology ; Limnology ; Algae ; Algal blooms ; Algal culture ; Bioassays ; Eutrophication ; Experimental research
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  • 153
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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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  • 154
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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
    Repository Name: AquaDocs
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  • 155
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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
    Repository Name: AquaDocs
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  • 156
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    Cultivation methods for Lemnaceae [Translation from: Wiadomosci Botaniczne 7(2) 153-164, 1963] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4876 | 1256 | 2011-09-29 15:47:17 | 4876 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: Representatives from the family of Lemnaceae (duckweed) make ideal experimental material for research into a succession of phytophysiological processes with regard to growth rate and vegetative reproduction. They are also easy to maintain in sterile cultures. Lemnaceae belong to the higher flowering plants (flowers are rarely produced), however they are distinguished by a much simplified morphological and anatomical structure. As water plants they possess the advantage, that they can be cultivated in synthetic media under laboratory conditions controlled by the application of both a known light intensity and temperature. This paper describes experimental research of growth of Lemnaceae in different conditions. Some of the variables were mineral media, illumination and aeration.
    Description: Translated from Polish into English
    Keywords: Biology ; Limnology ; Plant growth ; Plant nutrition ; Aquatic plants ; Laboratory culture ; Artificial aeration ; Experimental research
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  • 157
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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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  • 158
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    Mechanism of red colouration in Tovel-See (”Conclusions” only) [Translation from: Archiv fur Hydrobiologie 38 299-302, 1941] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4881 | 1256 | 2011-09-29 15:46:19 | 4881 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-06
    Description: Cases of red colouration in small lake basins, due to the abundant appearance of microorganisms have long been known. Usually it is caused by a fast, sudden, intensive propagation (so called ”bloom”) of Cyanophycae and bacteria. (e.g. Oscillatoracae, thiobacteria etc.). An exception to this is the red colouration of Tovel-See, an alpine lake basin in the Dolomites of the Brenta group (Trentino), lying at a height of 1178 m and hidden in the woodland of a valley. Here the red bloom has a double rhythm: a daily and a yearly rhythm. The colouration of one part of the lake takes place in the warmest months of the year (i.e. July, August, September) and in the middle hours of the day. The immediate origin of the bloom has been known for a long time: it is caused by the Peridinacae Glenodinium sanguineum. This paper describes the phenomenon of red colouration of the lake and discusses its conditions.
    Description: Translated from German into English
    Keywords: Biology ; Ecology ; Limnology ; Algae ; Algal blooms ; Freshwater lakes ; Water colour ; Glenodinium sanguineum
    Repository Name: AquaDocs
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  • 159
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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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  • 160
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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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  • 161
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    On the occurrence of Pithophora oedogonia (Mont.) Wittr. var. polyspora Rendle et West fil (Cladophoraceae) in the pond of the Wroclaw Botanical Garden [Translation from: Fragmenta Floristica et Geobotanica 22 255-260, 1976] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4888 | 1256 | 2011-09-29 15:46:15 | 4888 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: Species of Pithophora occasionally appear in Europe and are associated mostly with the tropical, higher water plants, cultivated in numerous botanical gardens. In June 1973 pale green, branched threads were discovered in the pond of the Wroclaw Botanical Garden, amongst filaments of Spirogyra crassa (Kutz.) Czurda emend. and Cladophora glomerata (L.) Kutz. floating on the water surface. They were maintained for several weeks in crude cultures and produced numerous, dark akinetes tightly packed with reserve material. This collected material was found to be a member of the family Pithophora, Wittr. Further examinations identified the material as Pithophora oedogonia. The findings point out that it is probable, that species of Pithophora Wittr. can become acclimatized in Europe, primarily in ponds of botanical gardens, where consequently they are able to tangle easily with higher tropical plants.
    Description: Translated from Polish into English
    Keywords: Biology ; Ecology ; Limnology ; Algae ; Ponds ; Organism morphology ; Taxonomy ; Pithophora oedogonia
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  • 162
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    Chilodonella cyprini (Moroff, 1902) [Translation from: Izv.gos.nauchno-issled.Inst.ozer.i rech.ryb.kh-va 49 25-28, 1959] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4887 | 1256 | 2011-09-29 15:46:48 | 4887 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: The ciliated protozoan Chilodonella cyprini is described. Chilodon parasitizes the body, gills and fins of fishes. The infusoria produce irritation of the integument and strengthened mucous secretion. The sparse knowledsge of the ecology of chilodon is summarised and some advice on the struggle against cholodoniasis in carp given.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Protozoan diseases ; Fish diseases ; Parasitic diseases
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  • 163
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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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  • 164
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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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  • 165
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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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  • 166
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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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  • 167
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    Comparison of permanent and temporary streams of calcareous Provence [Translation from: Annales de Limnologie 9(3) 273-292, 1973] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4892 | 1256 | 2011-09-29 15:45:59 | 4892 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: The rainfall regime and the karstic nature of the subsoil determines the alternation of a period of flow and a period of drought for a large number of Mediterranean streams. Amongst this type of stream it is possible to distinguish temporary streams, characterised by a period of flow for several months permitting the establishment of the principal groups of aquatic insects; and ephemeral streams whose very brief period of flow permits the establishment of a community reduced to a few species of Diptera. This paper aims to study the structure of the communities which colonise this particular type of stream and the ecology of the principal species which constitute these communities. Four French temporary streams were examined and temperature regimes, dissolved oxygen, calcium and magnesium measured. Samples of fauna were taken regularly and the biotic composition established. The analysis of similarities between the three permanent streams are discussed and compared with permanent streams.
    Description: Translated from French into English
    Keywords: Ecology ; Limnology ; Rivers ; Biotic factors ; Surveys ; Water temperature ; Dissolved oxygen ; Water hardness ; Invertebrate larvae ; Trichoptera ; Diptera ; France
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  • 168
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    Radioautographic method of determination of number of bacteria in water-bodies [Translation from: Informatsionnyi Byulleten Biologiya Vnutrennikh Vod No.26, 65-67, 1975] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4884 | 1256 | 2011-09-29 15:46:23 | 4884 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: The radioautographic method of determination of the number of autotrophic microorganisms was initially suggested for counting methane-oxidizing bacteria. With the help of this method colonies of hydrogen-oxidizing bacteria are differentiated even more clearly from heterotrophic. Under laboratory conditions it was shown that colonies grown on membrane filters from a pure culture of thionic bacteria on a nutrient medium with radio- active carbonate, give better prints on film. This method was tested by the authors for determining the number of these bacteria in the meromictic Lake Vae de San Juan during the expedition to Cuba in the summer of 1973. The study showed that that the thionic bacteria are found throughout the pelagial. It proved that the thionic bacteria can be well considered in water-bodies by the radioautographic method.
    Description: Translated from Russian into English
    Keywords: Ecology ; Limnology ; Freshwater lakes ; Photography ; Bacteria ; Methodology ; Analytical techniques ; Cuba
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  • 169
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    A study of flow conditions near the substratum in an experimental channel [Translation from: Verhandlungen der Internationalen Vereinigung fur Theoretische und Angewandte Limnologie 18, 718-725, 1972] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4890 | 1256 | 2011-09-29 15:45:54 | 4890 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: In a slow flow, on a smooth uniform substratum, a limited bed allows the existence of currents slow enough for benthic invertebrates. These conditions rarely occur naturally. The investigations carried out in this work aimed, on an intermediary scale, to define the influence of irregularities in the substratum on flow near the bottom. The substrata used were made of glass marbles. The investigations were carried out in a transparent channel of 70 cm in length and a rectangular section 10 x 5 cm. The data was analysed to study the general evolution of flow in terms of average speeds and the appearance of the turbulence near the bottom.
    Description: Translated from French into English
    Keywords: Biology ; Ecology ; Limnology ; Experimental research ; Channel flow ; Flow measurement ; Artificial substrata ; Benthic environment ; Invertebrate larvae
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  • 170
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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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  • 171
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    Recolonisation of temporary streams and evolution of a degree of stability of the zoocenose [Translation from: Ecologia Mediterranea No.1 149-164, 1976] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4893 | 1256 | 2011-09-29 15:46:14 | 4893 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: When flow returns to a temporary stream a certain number of plant and animal species establish themselves more or less rapidly on the stream-bed constituting the initial phase of evolution of the re-population. This phase is essentially characterised by the ”awakening” of animal species that passed the dry season in a dormant state and by the development of the first unicellular algae that constitute the periphyton. Then they are succeeded by more or less stable animal groups and the structural complexity increases. The authors of the present study aim to analyse the dynamics of community succession from the return of water to the biotope until its drying up. It is attempted to determine the influence of the duration of flow on this evolution. This work is based on the analysis of population diversity with reference to its two complementary aspects, species richness and equitability. The River Destel which was studied for this project is situated in the Gorge of Ollioules near the town of Toulon.
    Description: Translated from French into English
    Keywords: Ecology ; Limnology ; Rivers ; Biotic factors ; Surveys ; Invertebrate larvae ; Colonization ; France
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  • 172
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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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  • 173
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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
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  • 174
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    On the feeding of the larvae of Chironomidae during the planktonic period of life [Translation from: Nauch.Dokl.vyssh.Shk.Biol.Nauk 1 19-21, 1965] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4898 | 1256 | 2011-09-29 15:44:01 | 4898 | Freshwater Biological Association
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    Publication Date: 2021-07-07
    Description: It is known that the larvae of Chironomidae in the first stages of life after leaving the egg case, swim for a long time in a body of water. Positive reaction in light, the capability of directed swimming and passive floating in suspension allow the larvae to temporarily carry out a planktonic way of life. This study describes the behaviour of Chironomus dorsalis larvae after leaving the egg case. The feeding of chironomid larvae in the first stages of development was also described.
    Description: Translated from Russian into English
    Keywords: Biology ; Limnology ; Insect larvae ; Feeding ; Feeding behaviour ; Zooplankton ; Chironomus dorsalis
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  • 175
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    Observations on the distribution, daytime migrations and daily food intake rates of Chaoborus flavicans (Meigen) in the Goggausee [Translation from: Carinthia II 165(85), 184-190, 1975] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4896 | 1256 | 2011-09-29 15:43:41 | 4896 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: The Goggausee, in spite of its modest depth (Zmax = 12 metres), shows meromictic properties: autumn and spring circulation extend only to a depth of 8 metres. The water layers below about 10 metres are constantly oxygen-free, the critical zone with at least intermittent oxygen loss lies at a depth of between 6 and 10 metres. A limnological excursion in May 1974 offered an opportunity to investigate the daily vertical migration of the species Chaoborus flavicans with reference to its food supply of zooplankton as well as the chance to carry out some preliminary experiments on its rate of food intake. Among the studied features were the planktonic depth distribution of Chaoborus flavicans and the food intake of Chaoborus larvae under experimental conditions.
    Description: Translated from German into English
    Keywords: Biology ; Ecology ; Limnology ; Zooplankton ; Environmental surveys ; Freshwater lakes ; Population density ; Food consumption ; Population characteristics ; Vertical migrations ; Experimental research ; Insect larvae ; Austria
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  • 176
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    The family of chironomids or midges - Chironomidae. Keys to larvae and pupae [Translation from: Guide to the freshwater invertebrates of the European area of the USSR (Plankton and benthos) (ed. L. A. Kutikova and Ya. I. Starobogatov), p.371-431. Leningrad, Gidrometeoizdat, 1977] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4899 | 1256 | 2011-09-29 15:44:04 | 4899 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: The translation of this section of the larger publication ”Opredelitel' presnovodnykh bespozvonochnykh evropeiskoi chasti SSSR. (Plankton i bentos)” provides identification keys to the larvae and pupae of chironomids that occur in the Soviet Union. The morphology of the larvae of Chironomidae is described in the introductory part.
    Description: Translated from Russian into English
    Keywords: Biology ; Limnology ; Insect larvae ; Identification keys ; Animal morphology ; Russia ; Chironomidae
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  • 177
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    A simple method for counting bacteria with active electron transport system in water and sediment samples [Translation from: Kiel. Meeresforsch. 31(2) 83-86, 1975] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4903 | 1256 | 2011-09-29 15:44:11 | 4903 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: Description of a simple method for counting bacteria with active electron transport systems in water and sediment samples. Sodium succinate, NADH and NADPH served as electron donors. It is possible to see several sites of electron transport in the larger cells. Especially impressive are the plankton-algae, protozoa, and small metazoa. This is a partial translation of the ”method” section only.
    Description: Translated from German into English
    Keywords: Biology ; Limnology ; Water samples ; Bacteria ; Bacterial counters ; Bacterial filtration ; Methodology
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  • 178
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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
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  • 179
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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
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  • 180
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    Some abundant Tendipedid species (Diptera, Tendipedidae) of the Amu-Darya drainage basin. Acalcarella shilova, gen.n. only [Translation from: Ent.Obozr. 34 313-322, 1955] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4901 | 1256 | 2011-03-07 16:30:06 | 4901 | Freshwater Biological Association
    Details
    Publication Date: 2021-06-24
    Description: This document is a partial translation of taxonomic notes on two Diptera species (Acalcarella Shilova, Acalcarrella nucus) which were abundant in a survey of Tendipedid species (Diptera, Tendipedidae) of the Amu Darya drainage basin. These taxonomic notes of the larva, pupa and adults include drawings of the Acalcarella nucus larva.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Insect larvae ; Identification keys ; Animal morphology ; Taxonomy ; Pupae ; Amu Darya Basin
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  • 181
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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
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    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
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  • 182
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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
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  • 183
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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
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    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
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  • 184
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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
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    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
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  • 185
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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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  • 186
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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
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    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
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  • 187
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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
    Type: monograph
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  • 188
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    The intensity of photosynthesis in salt lakes of Crimea [Translation from: Informatsionnyi Byulleten Biologiya Vnutrennikh Vod No.37 26-29, 1978] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4915 | 1256 | 2011-09-29 15:45:27 | 4915 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: The purpose of this work was the study of phytoplankton production of the salt lakes of the Steppe region of Crimea, during the vegetative period of 1974. From May to October Sakskoe and Sasyk Lakes were examined, and from August to October - Moinakskoe Lake. The density of the salt water was measured and the intensity of photosynthesis was determined. From the data presented, it is apparent that the intensity of photosynthesis in Sakskoe and Sasyk Lakes, on average, is extremely high.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Salt lakes ; Phytoplankton ; Primary production ; Saline water ; Photosynthesis
    Repository Name: AquaDocs
    Type: monograph
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  • 189
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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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  • 190
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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
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  • 191
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    Studies on the complex formation of iron with humic substances [Translation from: Vom Wasser 53, 243-247, 1979] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4920 | 1256 | 2011-09-29 15:43:27 | 4920 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: Most of the humic substances which occur in natural waters have an iron content of a few percent, indicated by the mg/1 content of organically-bonded carbon. This iron is apparently bound in a complex with the humic substances, for it quite plainly differs in its chemical and physico-chemical properties from what one would expect from the purely inorganic iron-water system. The deviations range from the solubility to the redox behaviour, and thus are frequently the basis of analytical and technical difficulties. The key to the solution of most of this problem lies in a better understanding of the aforementioned bonds between the iron and the humic substances. This paper studies the iron content of the humic substance concentration from a bog lake sample and the complexing of iron by humic substances from the surface of the bog lake.
    Description: Translated from German into English
    Keywords: Biology ; Ecology ; Limnology ; Freshwater lakes ; Marshes ; Iron ; Humus ; pH
    Repository Name: AquaDocs
    Type: monograph
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  • 192
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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
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  • 193
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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
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  • 194
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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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  • 195
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    Comparative drift studies on streams in lower Austria (Flysch, gneiss and chalk formations) [Translation from: Schweizerische Zeitschrift fur Hydrobiologie 30 138-185, 1968.] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4919 | 1256 | 2011-09-29 15:43:25 | 4919 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: Seasonal changes and flooding have an extraordinarily great influence on the drift of organisms. The free water space plays the main part in the provision of food for some fish (Salmo trutta - trout): drift and content of the stomach are balanced here (Simuliidae): whereas others (Thymallus vulgaris) only selectively chose certain animals living at the bottom (molluscs). The total drift, drift of organisms and drift of organic material and minerals, plays a main role in the rate of production in streams. Besides the biology of the organisms living on the river bed, also the geological and hydrographical situation of the area plays a very important role for the composition of the drift. During the years 1964-1966 three streams in the characteristical geological formations flysch, gneiss and chalk of lower Austria were studied in regard to their drift. The Tulln (above St. Christopen), the Krems (above Senftenberg) and the Schwarza (above Hirschwang) seemed to be ideal for this comparative study because they are easy to reach. After summarising the hydrography and chemistry of examined rivers, the author examines the relationship between water level and total drift and the stratification of the total drift before analysing the drift of living organisms. Also considered are seasonal changes of drift of organisms and drift of exuviae.
    Description: Translated from Russian into English
    Keywords: Biology ; Ecology ; Limnology ; Rivers ; Drift ; Current data ; Surveys ; Stream flow ; Aquatic animals ; Hydrographic surveying ; Hydrography ; Austria
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  • 196
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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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  • 197
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    Taxonomic description of Peridinium lomnickii, P.lomnickii var. splendida and P. wierzejskii [Translation from: Flora Slodkowodna Polski. Tom 4. Cryptophyceae, Dinophyceae, Raphidoiphyceae, p326,328-330. Warsaw, 1974] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4941 | 1256 | 2011-09-29 15:41:15 | 4941 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: This partial translation from a larger paper provides taxonomic descriptions of the dinoflagellates Peridinium lomnickii, P.lomnickii var. splendida and P. wierzejskii. Illustrations are included.
    Description: Translated from Polish into English
    Keywords: Biology ; Limnology ; Identification keys ; Taxonomy ; Algae ; Plankton ; Peridinium lomnickii ; Peridinium wierzejskii
    Repository Name: AquaDocs
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  • 198
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    On new or insufficiently-known Chytridinae [Translation from: Archiv fur Protistenkunde 54 168-173 + pl.9, 1926] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4958 | 1256 | 2011-09-29 15:39:51 | 4958 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: This partial translation of a larger paper provides taxonomic descriptions of 5 fungal zoospores species: Olpidium vampyrellae, 0. pseudosporearum, 0. leptophrydis, Rhizophidium leptophrydis and Chytridium lateoperculatum.
    Description: Translated from German into English
    Keywords: Biology ; Limnology ; Identification keys ; Taxonomy ; Fungi ; Parasites
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  • 199
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    Calcareous concretions in the Levriere (tributary of the Epte, secondary tributary of the Seine, Eure department) [Translation from: Bull.Ass.fr.Etud.Quaternaire 1973(2), 79-87, 1973] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4959 | 1256 | 2011-09-29 15:39:13 | 4959 | Freshwater Biological Association
    Details
    Publication Date: 2021-07-07
    Description: From research carried, out on a section of the Levriere, concretions (granules, nodules, which were sometimes joined together) partly covering the river ”bottom” were observed. The authors propose to make besides a petrographic examination of the calcareous precipitations and to see if their origin is connected to a biological activity, or if it is purely a case of a physical-chemical precipitation. The hydrological background of the Levriere, a small river of the Normandy Vexin, is given and conditions of the formation of the concretions studied.
    Description: Translated from French into English
    Keywords: Biology ; Ecology ; Limnology ; Carbonate sediments ; Concretions ; Rivers ; Hydrology ; Algae ; France
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  • 200
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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
    Repository Name: AquaDocs
    Type: monograph
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