. W W . WEDDELL WEST WM WEDDELL MIDDLE WE WEDDELL EAST SG SOUTH GEORGIA BS BRANSFIELD STRAIT * SAMPLE FROM SIGHTED SWARM Fig. 95. Developmental condition of larval or mixed larval and adolescent swarms in the surface waters of the ice-free Weddell zone in winter and spring. disappeared. In Weddell East, however, it appears that the Sixth FurciHa may occasionally be en- countered dominant not only up to the end of September but even into early October (see Stations 2443, 2445 and 2447) and this (see below), it seems, may be a phenomenon peculiar to the far eastern reaches of the current. In Oct


. W W . WEDDELL WEST WM WEDDELL MIDDLE WE WEDDELL EAST SG SOUTH GEORGIA BS BRANSFIELD STRAIT * SAMPLE FROM SIGHTED SWARM Fig. 95. Developmental condition of larval or mixed larval and adolescent swarms in the surface waters of the ice-free Weddell zone in winter and spring. disappeared. In Weddell East, however, it appears that the Sixth FurciHa may occasionally be en- countered dominant not only up to the end of September but even into early October (see Stations 2443, 2445 and 2447) and this (see below), it seems, may be a phenomenon peculiar to the far eastern reaches of the current. In October and November the swarms are predominantly adolescent. The Sixth Furcilia survives in a varying measure of abundance throughout both months and may occasionally, although rarely, as for example at Stations 2447 and WS 488, be encountered as the dominant stage. It becomes very scarce, however, shortly after the middle of November and by December the last surviving larval stages have for all practical purposes^ outgrown themselves and reached the adolescent state.^ 1 In Weddell West a single Sixth Furcilia was in fact recorded in the 50-0 m. vertical haul at Station 760 in December 1931. ^ See, however, p. 338, note i. 39-2


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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti