Discovery reports (1964) Discovery reports discoveryreports32inst Year: 1964 STATION ADOLESCENT 6 FURCILIA S ul 3 32 O 30 o 28 ? 26 i 24 z 22 20 UJ O IB z < 16 a 14 j- 12 z 10 UJ 8 -I 6 * SWARMS IN OR CLOSE TO ICE Fig. io8. Developmentarcondition of young first-year swarms on the South Georgia whaling grounds, showing the backward state of those encountered in or near the ice (For vertical scale see legend to Fig. 107). a month later (Station RS 9) is still only 9-12. It seems obvious, therefore, that since the Sixth Furcilia at Station WS 487 was represented by some 10 of the total larva
Discovery reports (1964) Discovery reports discoveryreports32inst Year: 1964 STATION ADOLESCENT 6 FURCILIA S ul 3 32 O 30 o 28 ? 26 i 24 z 22 20 UJ O IB z < 16 a 14 j- 12 z 10 UJ 8 -I 6 * SWARMS IN OR CLOSE TO ICE Fig. io8. Developmentarcondition of young first-year swarms on the South Georgia whaling grounds, showing the backward state of those encountered in or near the ice (For vertical scale see legend to Fig. 107). a month later (Station RS 9) is still only 9-12. It seems obvious, therefore, that since the Sixth Furcilia at Station WS 487 was represented by some 10 of the total larval and adolescent stock, this, the last larval stage, must have been surviving clearly dominant (cf. Stations WS 267 and WS 285) in the young swarm recorded at Station RS 9. And this being so it seems probable that, were it possible to penetrate into high East Wind latitudes to show it, the Sixth Furcilia would be found surviving in the young first year swarms pre-eminently dominant up to the end of November, and possibly still dominant, but surrendering its dominance to the adolescent, in December. It would seem, therefore, that in these high latitudes, taking the mid-February rising off the Princess Martha Coast (p. 310, Fig. 74) as the starting-oif point for the development, the life-cycle of the larva in the surface takes upwards of 9 months or more to complete. This is the only observation we have as to the spring condition of the young swarms in the East Wind zone. It was obtained (p. 255, note i) from a factory ship.
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