. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. A ZOOGEOGRAPHIC ANALYSIS OF THE MYCTOPHIDAE 49 The distribution of Benthosema glaciate (Fig. 20), a shallow-living species with a night distribution between 12 m and 200 m, reveals that this Temperate Region indicator species transgresses the boundary limit, with a single specimen being taken in the northern Subtropical Region. Ordination of the MT-1600 data. -20 50 40 30 20 Fig. 20. Distribution of Benthosema glaciate. for this species (Fig. 21) indicates that it was taken at all temperate stations,
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. A ZOOGEOGRAPHIC ANALYSIS OF THE MYCTOPHIDAE 49 The distribution of Benthosema glaciate (Fig. 20), a shallow-living species with a night distribution between 12 m and 200 m, reveals that this Temperate Region indicator species transgresses the boundary limit, with a single specimen being taken in the northern Subtropical Region. Ordination of the MT-1600 data. -20 50 40 30 20 Fig. 20. Distribution of Benthosema glaciate. for this species (Fig. 21) indicates that it was taken at all temperate stations, and further, that in this region there was no apparent size stratification with depth (although opening and closing nets were not employed). The specimen from the Subtropical Region is very small by comparison (Fig. 21) and may only indicate transportation of juveniles across the boundary by ocean currents. These juveniles may have no potential for achieving sexual maturity. By contrast, Lamp any ctus crocodilus, a somewhat deeper-living Temperate Region species, is also found to the south of the boundary between the Temperate Region and the Subtropical Region. In IKMT samples, it was taken to as far south as about 32°N, but only as small specimens (maximum SL 23 mm). The ordination (Fig. 22) reveals a marked size stratification with depth in the Temperate Region, and further, that large specimens do occur in deeper waters south of the Temperate Region boundary, to about 34°N. Since these specimens are of a potentially reproductive size (maximum SL 178 mm), future study will include the examination of changes in sexual maturity across this boundary Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
