4945 to 4956 of 13961 results
There is much recent evidence that prolactin is an important influence on parental and incubatory behaviour in birds. In this study prolactin was measured at various stages of the breeding […]
The responses of phytoplankton populations to seasonal changes in radiation flux in two Antarctic lakes with extensive winter ice-cover are described. A phytoplankton capable of photosynthesis was found throughout the […]
Water-soluble and ethanol-soluble carbohydrates were extracted from leaves, shoots, roots, rhizomes and flowers ofParodiochloa flabellata (Lam.) Rasp. (=Poa flabellata (Lam.) Hook f.) throughout a growing season. Very high levels of […]
Round Island (19°51’S, 57°47’E), an uninhabited volcanic islet lying 14 miles NNE of the Mauritian mainland, provides locally important breeding grounds for four species of seabirds; the Trindade Petrel Pterodroma […]
Ozone photochemistry over Antarctica in summer has been examined using a 1‐D model. With diffusive transport alone, the predicted ozone decay rates from the December (summer) solstice to the March […]
Recent attempts to consolidate assessments of the effect of human activities on stratospheric ozone (O3) using one-dimensional models for 30° N have suggested that perturbations of total O3 will remain […]