KSIĄŻKI POWIĄZANE ZE SŁOWEM «GEMMULATION»
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1
The Masterpiece of Nature: The Evolution and Genetics of ...
These larvae settle and grow into adult sponges during the remaining part of the
summer. Gemmulation usually begins towards the end of October, and is
completed by the middle of November: some large individuals of Spongilla
produced a ...
Leveaux (1939) suggested that gemmulation was a byproduct of sponge growth,
implying that a certain minimum size had to be attained before gemmule
production. This suggestion has proved inadequate as an explanation, since, in
nature, ...
Patricia R. Bergquist,
1978
3
Aestivation: Molecular and Physiological Aspects
In this chapter, I will review our current understanding of the cell biology and
biochemical mechanisms of each of these steps in the life cycle focusing in
particular on (1) gemmulation, (2) diapause, (3) breaking of diapause, (4)
quiescence, ...
Carlos Arturo Navas, José Eduardo Carvalho,
2010
4
Progress in Invertebrate Zoology
Rasmont, R., La gemmulation des Spongilldes I. Ann. Soc. R. Zool. Belg., 40: 288
-304; 1954. II. Bull. Acad. R. Belg., 41: 214-223, 1955. 60. Rasmont, R., La
gemmulation des Spongillides (1) Rupture de la diapause par les agents chim-
iques.
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Chemical Zoology V2: Porifera, Coelenterata, And Platyhelminthes
Furthermore, a dramatic increase in the gemmulation rate of a population of
sponges can be produced by having a gemmule germinating within each fully
differentiated sponge, so as to modify the tissular balance of the latter and by
keeping ...
Both sponges attain a commercially desirable size after 7 years and may live up
to 20 years. Asexual reproduction The best known method of asexual
reproduction is called the gemmulation. Gemmulation begins when the
aggregates of cells, ...
7
Proceedings of the Estonian Academy of Sciences, Biology and ...
to the family Spongillidae gemmulation takes place. We were able to distinguish
between megascleres, microscleres, and gemmuloscleres in our preparations,
using a common light microscope. Unfortunately, the sample of E. fluviatilis that ...
8
Stem Cells: From Hydra to Man
Herlant-Meewis H (1948) La gemmulation chez Suberites domuncula. Arch. Anat
. Micros. 37:289–322. Höhr D (1977) Differenzierungavorgange in der
keimenden gemmula von Ephydatia fluviatilis. Wilhelm Roux's Arch. 182:329–
346. Krasko ...
9
Colloques internationaux du Centre national de la recherche ...
elles-mêmes en gemmulation, l'intensité du phénomène pouvant être mesurée
soit par le pourcentage d'éponges qui le présentent, soit par le nombre moyen de
gemmules qu'elles produisent. Faits et hypothèses explicatives Nous avons ...
10
Archiv Für Hydrobiologie
VI. Induction of gemmulation It is clear that the environmental factors effecting
gemmulation are quite different for the two gemmule types. The formation of
brown, thick-walled gemmules is associated with low surface to volume ratios of ...