. (0(0 (0(1) (0 (I) (2) (2) (2) (2)  % (0 (2) (0)0(0 121 JE570 1637 256 46 61 174 245 345 205 186 82 200 85 146 75 416 269 100 ISO 52795 lOO 31010057189 379 325 20 522 818 35 517 lOO lOO lOO lOO 100 388 176 231 102 63 84 lOO 66 64 60 55 POSTE 52 48 44 40 36 32 28 24 20 16 12 8 N ?AME- -^ URED DE L'échantillon de l'Essaim observé fig- 57- l'état de développement de l'adolescent d'essaims dans l'est la dérive due au vent, montrant l'état correspondant de l'adolescent dans les essaims à la même dérive de Weddell, ou environ le même, le temps. Remarque échelle verticale à 4 mm. des groupes, p. ex. 20  = 17-20 mm

• Contributeur: The Bookworm Collection / Alamy Banque D'Images
• ID de l’image: MCNFXB
• Taille du fichier: 14,3 MB (337,6 KB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 4236 x 1180 px | 35,9 x 10 cm | 14,1 x 3,9 inches | 300dpi

Informations supplémentaires

Cette image appartient au domaine public, ce qui signifie que le droit d’auteur a expiré ou que le titulaire du droit d’auteur a renoncé à ses droits. Les frais facturés par Alamy couvrent l’accès à la copie haute résolution de l’image.

Cette image peut avoir des imperfections car il s’agit d’une image historique ou de reportage.

. (0(0 (0(1) (0 (I) (2) (2) (2) (2) Scale per cent (0 (2) (0(0(0 121 I570 1637 256 46 61 174 245 345 205 186 82 85 200 146 ISO 100 75 416 269 527 95 lOO 310 100 57 189 379 325 20 522 lOO 818 lOO 35 517 lOO 100 lOO 388 176 63 84 lOO 231 102 STATION 66 64 60 55 52 48 44 40 36 32 28 24 20 16 12 8 N?MEAS- -URED ^ SAMPLE FROM SIGHTED SWARM Fig- 57- Developmental condition of adolescent swarms in the East Wind drift, showing the corresponding condition of adolescent swarms found in the Weddell drift at the same, or approximately the same, time. Note vertical scale in 4-mm. groups, e.g. 20 = 17-20 mm. zone. During the long period, June to December, when the East Wind drift is virtually closed to navigation, the modal values must be correspondingly low, a single observation in December^ giving some indication of how low they might be. In other words it is clear from Fig. 55 that in the East Wind zone although some of the swarms attain the modal stature of their northern counterparts, a high proportion of them, to all appearances throughout life, never do. It is also clear that the avail- able feeding-stuff for the whales that reach these high latitudes must often consist of considerably smaller animals than they would normally encounter in the northern zone. More striking illustrations of how the East Wind swarms persistently lag behind their northerly contemporaries, in both stature and development, are given in Figs. 56 and 57, the former 1 Obtained from a factory ship which (p. 124) had forced a passage through the ice to a position not normally attainable by a vessel such as 'Discovery II'.

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