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  • biomonitoring  (1)
  • female stage 3  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Ultrastructure of prostate gland tissue in males and females with intersex phenomena of Littorina littorea L. (1998)
    Springer
    Hydrobiologia 378 (1998), S. 227-233 
    Details
    ISSN: 1573-5117
    Schlagwort(e): Littorina littorea ; prostate gland ; histology ; intersex ; female stage 3
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract In the prosobranch snail Littorina littorea (L., 1758) the ultrastructure of the prostate gland cells (pgc) in males and the altered glandular epithelium of the pallial oviduct of females in intersex stage 3 is compared. Regarding form, structure, organelles and secretory products the pgc in males are identical with the corresponding gland cells of the females. Consequently these results demonstrate that in females of intersex stage 3 the epithelium of the pallial oviduct, which originally consists of several (3) glandular parts, is transformed into a male prostate gland.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1003222629596
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Marisa cornuarietis (Gastropoda, prosobranchia): a potential TBT bioindicator for freshwater environments (1995)
    Springer
    Ecotoxicology 4 (1995), S. 372-384 
    Details
    ISSN: 1573-3017
    Schlagwort(e): Imposex ; TBT pollution ; biomonitoring ; reproduction ; Marisa cornuarietis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik
    Notizen: The ramshorn snail Marisa cornuarietis (L., 1767) exhibits imposex (occurrence of male parts in addition to the female genital duct) under the influence of TBT (tributyltin) in laboratory experiments and accumulates this biocide in a time-and concentration-dependent manner. A comparison of BCF (bioconcentration factors) demonstrates that this limnic species accumulates more TBT than marine species. Evidence is given that TBT causes hormonal disorders which are responsible for imposex development. The testosterone/oestradiol quotient reflects the imposex development which can be described by a classification scheme differentiating four stages in Marisa cornuarietis. In the background of the constantly increasing organotin concentration in the limnic environment Marisa cornuarietis could be a well-suited bioindicator for TBT pollution. No other limnic species with a lower threshold concentration for measurable TBT effects is reported within the literature.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00118872
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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