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  • 1990-1994  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    The role of sutures in shrinking of the test in Heliocidaris erythrogramma (Echinoidea: Echinometridae) (1993)
    Springer
    Marine biology 117 (1993), S. 423-430 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A laboratory experiment was used to examine whether a decrease in the width of sutures is the basis for shrinking of the test in echinoids under conditions of low food availability and whether the body condition of sea urchins is likely to be retained when shrinking occurs. This experiment was performed with H. erythrogramma specimens collected in January 1987 from Pt. Lillias in Corio Bay, Australia. Suture widths in the test and gonad volume were significantly less (relative to body volume) in Heliocidaris erythrogramma (Val.) in the low food treatment than the high food treatment after 4 mo. These results imply that sea urchins which shrink may have a poorer body condition and be less able to reproduce than sea urchins that do not shrink. A comparison of the expected to the observed changes in suture width showed that a decrease in suture width is involved in the shrinking of the test in H. erythrogramma and may be of sufficient magnitude to fully explain the observed reduction in test size. This suggests that the amount a sea urchin may shrink under low food conditions is constrained by the degree to which the sutures can be reduced in width.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00349318
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Yeast telomere length varies in response to changes in the amount of polyC1 – 3A in the cell (1990)
    Springer
    Molecular genetics and genomics 221 (1990), S. 280-282 
    Details
    ISSN: 1617-4623
    Keywords: Telomeres ; Yeast telomeres
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Yeast chromosomes terminate in a GC-rich tail of DNA. Previous investigations have shown that the length of this tail can change in response to genetic variation. Here we present data that show that the length can also alter in response to changes in the amount of the GC-rich DNA found elsewhere in the nucleus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00261732
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    Paper (German National Licenses)
    Fulltext
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