Archive image from page 139 of Discovery reports (1935-1936) Discovery reports discoveryreports11inst Year: 1935-1936 * SHALLOW WATER STATIONS 3k. 7fi r DEEP WATER STATIONS SCALE 10 £[£= INSUFFICIENT NUMBERS 20 30 40 I I I PER 50 Ml. DEPTH (H) - NUMBER OF STATIONS FROM WHICH AVERAGE PERCENTAGES ARE TAKEN Fig- 55- Diagrams showing the mean depth distribution of the commoner species of Copepoda at shallow- and deep-water stations. Proportions expressed as percentages per 50 m. depth. with the water-movement chart in Fig. 6. The series of consecutive N 100 H nets described on p. 252 indic
Archive image from page 139 of Discovery reports (1935-1936) Discovery reports discoveryreports11inst Year: 1935-1936 * SHALLOW WATER STATIONS 3k. 7fi r DEEP WATER STATIONS SCALE 10 £[£= INSUFFICIENT NUMBERS 20 30 40 I I I PER 50 Ml. DEPTH (H) - NUMBER OF STATIONS FROM WHICH AVERAGE PERCENTAGES ARE TAKEN Fig- 55- Diagrams showing the mean depth distribution of the commoner species of Copepoda at shallow- and deep-water stations. Proportions expressed as percentages per 50 m. depth. with the water-movement chart in Fig. 6. The series of consecutive N 100 H nets described on p. 252 indicated that it occurred in well-defined patches. The species was first found in the Antarctic by the 'Challenger',1 and has subse- quently been recorded by most Antarctic expeditions: 'Belgica',2 National Antarctic ('Discovery'),3 'Gauss',4 'Scotia',5 'Terra Nova',6 'Aurora'7 and 'Vikingen'.8 Farran (1929) in his report on the Terra Nova collection writes as follows: One of the most characteristic and plentiful of the Antarctic copepods, though not so abundant as Calanus acutus. It occurred on almost every station within the Antarctic circle, adults, mainly fe- males, being common between 66° 30' and 760 S, but scarce under the ice south of 760 S. North of 66° 30' very few adults were found though the younger stages were abundant on several stations. The most northern point at which an adult female was taken was 540 38' S. It was 'by far the most abundant of all the Copepods' in the Aurora collections, and was very common at the winter quarters of the Gauss Expedition, approximately 1 Brady (1883). - Giesbrecht (1902). 3 Wolfenden (1908). 4 Wolfenden (1911). 5 Scott (1912). 6 Farran (1929). ' Brady (1918). 8 Ottestad (1932).
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