926 resultados para FAO-56


Relevância:

20.00% 20.00%

Publicador:

Resumo:

Dormancy has been observed in several species of Cyclops. Animals in dormancy are characterised by almost complete inactivity of the main appendages and sluggish intestinal peristalsis. In Cyclops vicinus dormancy can take place in copepod stages III (19%), IV (78%) and V (3%) but one and the same animal only in one developmental stage. The author gives his own results between frequency of dormancy and photoperiod (20 C, 1000 lux). He concludes that dormancy in C. vicinus can be influenced by day length and can be ended prematurely by short day length.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

This partial translation of a bigger publication provides an identification key to the aquatic plant Hydrillae (Hydrocharitaceae) in Europe. Illustrations are included.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

This dataset provides raw data of chemical analyses made during studies on seasonal variations of 25 frequently sampled tarns in Cumbria. Measurements of sodium, calcium, potassium, magnesium, pH, chloride ions, alkalinity, sulphite, strong acids and nitrate were taken between 1954 and 1956 and between 1974-1976.

Relevância:

20.00% 20.00%

Publicador:

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Cover. Contents.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Charles Darwin Foundation for the Galapagos Islands. Map.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Die Sitzung zeigte in diesem Jahr einmal mehr sehr deutlich, dass einzelne Länder bei bestimmten Fisch und Fischerzeugnissen konkrete wirtschaftliche Interessen verfolgen und versuchen, diese in die Gestaltung bzw. die Formulierung der Codex-Standards, sofern es möglich ist, einfließen zu lassen. Insbesondere zu Beginn der Ausarbeitung eines neuen Standardentwurfs steht die Frage nach dem globalen Handel im Vordergrund. Als Hauptkriterien für einen neuen Standard gelten die aktuelle, internationale wirtschaftliche Bedeutung des Fisches oder Fischerzeugnisses, bestehende wissenschaftliche Kenntnisse über dieses Erzeugnis und die Notwendigkeit einer Qualitäts-und Risikoeinstufung.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Front cover. Contents.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Back cover.