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  • 2005-2009  (13)
  • 1985-1989  (11)
  • 1965-1969  (11)
  • 1950-1954  (13)
  • 1940-1944  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    The phytoplankton of an enriched, soft-water lake subject to intermittent hydraulic flushing (Grasmere, English Lake District) (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Freshwater biology 19 (1988), S. 0 
    Details
    ISSN: 1365-2427
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: SUMMARY. 1. The abundance and species composition of the phytoplankton of Grasmere were monitored over a 12-year period following the commissioning of a small sewage treatment works, upstream of the lake.2. Although Grasmere has been subject to increased phosphorus-loading and has quickly developed many features associated with eutrophication, the composition of its plankton has retained the characteristics of a mesotrophic, soft-water lake: a vernal diatom maximum, generally dominated by Asterionella, is followed by summer growths of nanoplanktonic species, of various colonial Chlorophyceae, before a substantial return to Asterionella-dominance in the autumn. In cooler summers there have been episodes of renewed diatom growth. followed by truncated recapitulations of the essential summer sequence. Anabaena solitaria was relatively common in drier summers when dissolved inorganic nitrogen fell to low concentrations, although many of the ‘larger’ algal species associated with stratified eutrophic lakes (Aphanizomenon, Microcystis, Ceratium spp.) have failed to become abundant in Grasmere.3. Mean biomass levels (as indicated by chlorophyll concentration) have increased in response to the enrichment, though they do not conform well with most chlorophyll/phosphorus regression-models.4. The key factor resisting a more complete transition to a typical eutrophic plankton appears to be the efficiency of episodic flushing of the lake during periods of high fluvial discharge sustained by heavy rainfall over the extensive, mountainous catchment. The probabilities that these limnological conditions might fail to deter the development of ‘nuisance’ blooms are briefly assessed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1365-2427.1988.tb00359.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Anatomical Organization of Macaque Monkey Striate Visual Cortex (1988)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Neuroscience 11 (1988), S. 253-288 
    Details
    ISSN: 0147-006X
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Biologie , Medizin
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1146/annurev.ne.11.030188.001345
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Otolith shape discriminates between juvenile Atlantic salmon, Salmo salar L., and brown trout, Salmo trutta L. (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 33 (1988), S. 0 
    Details
    ISSN: 1095-8649
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Otoliths of Atlantic salmon, Salmo salar L., are more slender than the otoliths of brown trout, Salmo trutta L. Discriminant analysis on otolith measurements of juvenile Atlantic salmon and brown trout from four river systems revealed a discriminant function which distinguished more than 94% of the cases. This function was tested by using data from a fifth river with cohabiting Atlantic salmon and brown trout: all Atlantic salmon and 91 % of the brown trout were correctly classified.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1095-8649.1988.tb05538.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Feeding migration of roach, Rutilus rutilus (L.), in Lake Arungen, Norway (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 30 (1987), S. 0 
    Details
    ISSN: 1095-8649
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: In the period April–July 1980 we studied the feeding migration and food of roach in a small tributary of the eutrophic Lake Årungen, south-eastern Norway. Tagging experiments revealed a tendency in roach to utilize a specific tributary both for feeding and for spawning. The mean size of roach ascending the tributary in late June and July was significantly larger than the mean size of roach spawning 1–2 months earlier, probably due to higher water discharge in July than in May and June. The experiment indicates two separately motivated migrations involving homing. The roach fed more profitably in the tributary than in the lake, both in terms of food availability and predator avoidance.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1095-8649.1987.tb05759.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Differential Mortality Rates of Fin-Clipped and Carlin-Tagged Roach (Rutilus rutilus L.) (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of applied ichthyology 1 (1985), S. 0 
    Details
    ISSN: 1439-0426
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
    Notizen: Roach were marked by fin-clipping (N= 15888) or tagged with Carlin-tags (N= 1476) during their spawning migration in two tributaries to Lake Årungen, Norway, in 1980. A total of 1746 of these roach were recaptured during spawning in 1981. The recapture rate of fin-clipped roach was significantly higher than the recapture rate of Carlin-tagged roach, probably due to differential mortality rates.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1439-0426.1985.tb00415.x
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Eutrophication (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 557-558 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Eutrophication means “the process of becoming rich in dissolved nutrients”. Dr. J. W. Lund reviews the sort of problems which will be facing the International Symposium on Eutrophication, to be held in Madison, Wisconsin, during June 11–16, ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/214557a0
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    An Alternative to Latin Diagnoses (1950)
    [s.l.] : Nature Publishing Group
    Nature 165 (1950), S. 454-454 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] In Great Britain, at least, there are few men of science with a deep knowledge of Latin. Commonly, assistance has to be obtained in making Latin diagnoses or, what is worse, someone other than the author translates them. The translator may well neither be an algologist nor even a botanist. Even ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/165454b0
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Contributions to our knowledge of British algae (1951)
    Springer
    Hydrobiologia 3 (1951), S. 93-100 
    Details
    ISSN: 1573-5117
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00047581
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    A sedimentation technique for counting algae and other organisms (1951)
    Springer
    Hydrobiologia 3 (1951), S. 390-394 
    Details
    ISSN: 1573-5117
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00045562
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Digitale Medien
    Digitale Medien
    The parasitism of planktonic desmids by fungi (1969)
    Springer
    Plant systematics and evolution 116 (1969), S. 351-377 
    Details
    ISSN: 1615-6110
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Desmids in Windermere, a lake in the English Lake District, are often parasitized by chytridiaceous or biflagellate phycomyceteus fungi. Descriptions are given of the fungal parasites concerned, several of which cannot yet be named. The relationship between the severity of parasitism, decrease in the number of live cells of desmids and increases in those of dead cells are described and illustrated. There is evidence, from over twenty years of observations on desmids and their parasites, that the examples given here are not peculiar to the years concerned and that parasitism occurs similarly in other lakes. Parasitism does not alter the overall seasonal pattern of periodicity of the desmids; it can have a marked effect on interspecific competition. There is no evidence that desmids must be already adversely affected by other environmental conditions before severe parasitism can arise. Indeed the evidence available suggest that parasites commonly infect healthy and rapidly growing cells.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01379634
    Standort Signatur Erwartet Verfügbarkeit
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