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Digitale Medien

Light-shade adaptation of Stylophora pistillata , a hermatypic coral from the Gulf of Eilat (1981)

Falkowski, Paul G. ; Dubinsky, Zvy

[s.l.] : Nature Publishing Group

Nature 289 (1981), S. 172-174

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] Specimens of S. pistillata, adapted to light and shade regimes, were collected from a remote reef near Nabq in the Sinai Peninsula (28.20° N, 034.95° E) and taken immediately to a lagoon near a shore-based laboratory. The corals were kept in shaded (10% incident light), submerged baskets in ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/289172a0

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Digitale Medien

Some aspects of the ecology of the desert snail Sphincterochila prophetarum in relation to energy and water flow (1981)

Steinberger, Yosef ; Grossman, Shlomo ; Dubinsky, Zvy

Springer

Oecologia 50 (1981), S. 103-108

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ISSN: 1432-1939

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Summary Between 1976–1978, we studied the ecology of the Sphincterochila prophetarum, the most common snail, on stony slopes in Northern Negev. Energy and water flow determinations were made at the individual and population levels on a field observation basis and metabolic data were derived from laboratory simulations. The snails are active during 5–7% of the time during the year, while the remaining 95% of the time, the snails are in aestivation under stones. The energy and water inputs during the short feeding periods are very fast. Only 8% of the total energy in the eaten food are assimilated. Eighty-nine percent of the total assimilated energy are utilized in respiration during the various periods of activity and dormancy. The water loss during the feeding and activity period is about 37% of the total annual input. The snails lose twice as much the amount of water during the winter dormancy periods than in the summer dormancy period.