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  • Electronic Resource  (3)
  • 1975-1979  (3)
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  • Electronic Resource  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Hatching of the Anostracan Branchiopod Chirocephalus diaphanus Prévost II. The role of embryonic movements (1975)
    Springer
    Hydrobiologia 46 (1975), S. 377-390 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A study on the hatching mechanism in the egg of C. diaphanus was carried out. The complete escape of the nauplius from its three membranes takes place through two distinct stages, namely the breaking stage and the hatching stage. The former seems to be strictly an osmotic phenomenon, and the latter is more likely to be caused by mechanical means. A detailed study on the embryonic movements was carried out. The possible presence of a hatching movement was discussed. The presence of spiny projections aiding in the hatching process was also demonstrated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028281
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Hatching of the Anostracan Branchiopod Chirocephalus diaphanus Prévost I. Osmotic processes and the possible role of glycerol (1975)
    Springer
    Hydrobiologia 46 (1975), S. 369-375 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract An osmotic hatching mechanism is proposed for the Anostracan Branchiopod Chirocephalus diaphanus, Prevost. In this mechanism, glycerol is thought to accumulate in the egg as a result of the metabolism of the embryo. The osmotic pressure exerted by the egg, largely due to this glycerol accumulation, causes water to enter from the environment. Eventually the hydrostatic pressure thus generated is sufficient to cause rupture of the eggshell. It is recognised that hatching in this Anostracan is a two-staged phenomenon, a process of “breaking”, in which glycerol is involved, preceding true “hatching”, in which glycerol is not involved. The egg is described and the physiology and ecological significance of the proposed hatching mechanism are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028280
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Embryonic development and hatching of chirocephalus diaphanus prévost (Crustacea: Anostraca) in nature (1975)
    Springer
    Hydrobiologia 47 (1975), S. 1-11 
    Details
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The embryonic development and hatching of C. diaphanus under natural conditions were investigated. Most of the embryonic development takes place during the dry period of the pond. Thus eggs are ready to hatch as soon as the pond is filled with rainwater. The pattern of the distribution of eggs on the bottom of the pond has a great value for the survival of the species. Adult females tend to lay their eggs mainly in the central parts of the pond.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00036740
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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