. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. Scale p<r cent (I) (1) ° '°'°° (I) (0 /2\ O 50 lOO ) (0 dxo 01. (I) CO (00) DATE STATION 68 64 60 56 52 46 uj 44 o 40 I 36 °= 32 I 28 O z 24 UJ _l 20 16 12 8. 4 52 40 32 2: 580, 102 107 132 104 lOO 136 171 17 III 108 120 20O 251 564 197 74 I570 65 57 27 99 55 379 79 271 103 153 176 49 216 58 37 97 128 64 100 96 62 lOO 37 265 189 42 99 56 7\ t SAMPLE FROM SIGHTED SWARM Fig. 133. Developmental condition of the staple whale food in spring, the figures in brackets indicating the dominant stage of
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. Scale p<r cent (I) (1) ° '°'°° (I) (0 /2\ O 50 lOO ) (0 dxo 01. (I) CO (00) DATE STATION 68 64 60 56 52 46 uj 44 o 40 I 36 °= 32 I 28 O z 24 UJ _l 20 16 12 8. 4 52 40 32 2: 580, 102 107 132 104 lOO 136 171 17 III 108 120 20O 251 564 197 74 I570 65 57 27 99 55 379 79 271 103 153 176 49 216 58 37 97 128 64 100 96 62 lOO 37 265 189 42 99 56 7\ t SAMPLE FROM SIGHTED SWARM Fig. 133. Developmental condition of the staple whale food in spring, the figures in brackets indicating the dominant stage of the female, the figures at the bottom the number of euphausians measured in each 22-24 rnonth old, or, as from Station 1029 onwards, each 10-12 month old, sample examined. For vertical scale see legend to Fig. 107. The principal features of the developmental condition of the staple class in spring are in brief then as follows: (i) In the main this, the principal diet of the whales, is represented in spring by 22-24 nionth old swarms nearing the end of their second year of growth, swarms in which, following Bargmann, the females have reached stages 3, 4 and 5 in October, 4 and 5 in November and 5 and 6 in December.^ (2) Broadly these second year swarms fall within a 25-36 mm. length range in the first half of October, a 29-48 mm. length range in the second half of October and first half of November and a 35-56 mm. length range in the second half of November and in December. (3) In the second half of spring, from about the middle of November onwards, the 10-12 month old first year swarms, now growing rapidly and developing a strong to dominant, in December some- times an exclusive, over 20 mm. component, contribute more or less heavily to the mass of the staple feeding-stuff. In swarms of East Wind origin, however, as, for instance, in those encountered south- east of Kerguelen (Stations 1630, 1632 and 2139) and at the eastern end of the Bransfield Strait (Stations 537 and
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
