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  • 1
    Electronic Resource
    Electronic Resource
    Structure of the yolksac epithelium and gills in the early developmental stages of rainbow trout (Salmo gairdneri) maintained in different ambient salinities (1978)
    Springer
    Environmental biology of fishes 3 (1978), S. 345-354 
    Details
    ISSN: 1573-5133
    Keywords: Salmonids ; Histology ; Osmoregulation ; Embryo ; Alevin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Synopsis Small numbers of ‘mitochondria-rich’ (‘chloride’) cells were found in the yolksac epithelium of rainbow trout (Salmo gairdneri) embryos just before hatching and in eleuthero-embryos up to 14 days after hatching. This suggests that the yolksac epithelium may play a limited ionoregulatory role in this species. ‘Mitochondria-rich’ cells were also present in small numbers in the branchial epithelium of embryos just before hatching and in increasing numbers in eleutheroembryos during the first two weeks after hatching. The cells in the branchial epithelium showed marked variations in appearance, particularly in the fine structure of the tubular (smooth) endoplasmic reticulum. Few of the mitochondria-rich cells examined here had the pitted apex which is characteristic of homologous cells in other species. There appeared to be no differences in the numbers or appearance of ‘mitochondria-rich’ cells in embryos and eleutheroembryos reared in different ambient salinities (distilled water, 110/00 and 130/00 sea water), possibly indicating that the genesis of the ionoregulatory function of the gills has not occurred at that interval of development.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00000526
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Histological investigation of pituitary homotransplants in the marine form (trachurus) of the threespine stickleback, Gasterosteus aculeatus L. (1970)
    Springer
    Cell & tissue research 104 (1970), S. 337-344 
    Details
    ISSN: 1432-0878
    Keywords: Pituitary ; Teleosts ; Homotransplants ; Histology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Whole pituitary glands were autotransplanted into the tail musculature of intact sticklebacks similar in size to the donors. The structure of the grafted pituitaries and of the in situ glands in the recipient and sham-operated fish was examined. The prolactin-secreting cells, thyrotrophs and possibly the gonadotrophs showed signs of being under inhibitory hypothalamic control whereas the somatotrophs appeared to be more autonomous of hypothalamic influence. The pars intermedia and corticotrophs appeared to be dependent upon the hypothalamus for maintenance of functional acitvity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335686
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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