. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. (b) JULY- AUGUST. • 33 6 7 89 34 I 234567 9 35 I 2 3 4 9 34 1 2 3 4 5 Fig. 23. The vertical distribution of in relation to temperature and salinity, based on three lines of stations on the meridian of o°, one in summer and two in winter. The core of the South Atlantic Central water is marked S. A. and that of the Antarctic Intermediate water Above the Antarctic Intermediate water and to the left of the South Atlantic Central water is the Subantarctic surface water. Below the Anta
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. (b) JULY- AUGUST. • 33 6 7 89 34 I 234567 9 35 I 2 3 4 9 34 1 2 3 4 5 Fig. 23. The vertical distribution of in relation to temperature and salinity, based on three lines of stations on the meridian of o°, one in summer and two in winter. The core of the South Atlantic Central water is marked S. A. and that of the Antarctic Intermediate water Above the Antarctic Intermediate water and to the left of the South Atlantic Central water is the Subantarctic surface water. Below the Antarctic Intermediate water, enclosed by two lines is the warm deep water, while to the left of this is the Antarctic surface water. Open circles represent hauls containing no S. gazellae. Fig. 25, in which the animals at stage III and IV maturity from N70V hauls have been plotted against temperature and salinity, shows that they are concentrated in the warm deep layer. This is discussed further on pp. 270-1, but the fact must be mentioned here in order to obtain a complete picture of vertical distribution. These mature animals habitually migrate to deep water (750- 2000 m.) to breed, and animals sinking down for this purpose are taken at intermediate depths. It has been shown above that for most of its life, S. gazellae is an inhabitant of the surface waters, and is mainly concentrated in the 100-50 m. layer; but in the winter months in the Antarctic it sinks to the upper layers of the warm deep water between 250-100 and 500-250 m. At the same season in the Subantarctic, the population is about equally concentrated in the 100-50 and 250-100 m. layers, partly in Subantarctic surface water, and partly in Antarctic intermediate water. In winter the smallest individuals form that part of the population which is nearest to the surface, the larger-sized animals occurring below, and increasing in size with increasing depth. In summer the 5-z. Please note that these images are extract
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
