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  • 1
    Electronic Resource
    Electronic Resource
    Étude cytochimique des groupes sulfhydriles au cours des modifications de la détermination embryonnaire chez l'œuf de l'oursinParacentrotus lividus (1961)
    Springer
    Cellular and molecular life sciences 17 (1961), S. 316-317 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A cytochemical study of the distribution of sulfhydryl groups in animalized and vegetalized embryos of the sea-urchinParacentrotus lividus has been made by use of the Bennett's reagent. The distribution of the sulfhydryl groups appears homogeneous in these embryos. No gradient has been observed in the experimental conditions used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02158176
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Heterochronic Developmental Plasticity in Larval Sea Urchins and Its Implications for Evolution of Nonfeeding Larvae (1992)
    Society for the Study of Evolution | Wiley
    In:  Evolution, 46 (4). p. 972.
    Details
    Publication Date: 2020-07-31
    Description: Preexisting developmental plasticity in feeding larvae may contribute to the evolutionary transition from development with a feeding larva to nonfeeding larval development. Differences in timing of development of larval and juvenile structures (heterochronic shifts) and differences in the size of the larval body (shifts in allocation) were produced in sea urchin larvae exposed to different amounts of food in the laboratory and in the field. The changes in larval form in response to food appear to be adaptive, with increased allocation of growth to the larval apparatus for catching food when food is scarce and earlier allocation to juvenile structures when food is abundant. This phenotypic plasticity among full siblings is similar in direction to the heterochronic evolutionary changes in species that have greater nutrient reserves within the ova and do not depend on particulate planktonic food. This similarity suggests that developmental plasticity that is adaptive for feeding larvae also contributes to correlated and adaptive evolutionary changes in the transition to nonfeeding larval development. If endogenous food supplies have the same effect on morphogenesis as exogenous food supplies, then changes in genes that act during oogenesis to affect nutrient stores may be sufficient to produce correlated adaptive changes in larval development.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.2307/2409750
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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