By Siebrecht van der Spoel, Robert Pieter Heyman (auth.)
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Extra resources for A Comparative Atlas of Zooplankton: Biological Patterns in the Oceans
Example text
Farrani (see also fig. 55). F I G. 57 Distribution of the polytypic species Clio pyramidata. p. forma pyramidata, 2 = C. p. p. p. forma sulcata. ~~~~~~--J--~-~--+--+--+-~~~~~~ 80 ~~r-~~~~T-~--~--T-~--~--T--T--~--~~--~~EZr--T--~--r--1180 ~~~~~30ckI3~kI~~~~~~dO~~~~~~~~S 45 40 20 0 E 20 40 60 80 100 1 20 140 160 E 180 160 140 1 20 100 ~~~~~~~~qu~~~qu~OC~~~~~~~~~~~~N 80 o 20 40 ~--4---+---~-4---+--~--~--4---+-~~~---+--~--~--+---~~---+--~--~ 60 The species-group Eucalanus hyalinus (fig. 58) shows a rather complex speciation in the N.
59 Distribution ofthe genus Peraelis (see also fig. 60). I = P. molueeensis, 2 = P. retieulata, 3 = P. apieifulva, 5 = Dakar Centre. F I G. 47 40 20 0 E 20 40 60 80 100 120 140 160 E 1 160 140 120 100 80 ~~~~~~~~~~~~~~~~~~3q~~~~~~~~N ~--4---+-~~-4---+--~--4---+---~~---+--~--4---4---r-~---+--~--4---~60 The genus Peraclis (figs 59 & 60) provides an example of a group of species spread around one centre (faunal centre 8 in fig. 16). The present genus is chiefly mesoplanktonic but in the epiplanktonic genus Phronima exactly the same patterns are found.
Monsoon. FI G. 47 Distribution of Limacina lesueuri. blaek = areas with high abundanee, hatehed = areas with low abundanee. FI G. 48 Distribution of Clio cuspidata. blaek, = areas with high abundanee, hatehed = areas with low abundanee. consequences one connects with the abundance, whether one proposes the one or the other type of distribution as characteristic of a species. 48), like that ofthe preceding species, is ofthe STYLOCHEIRON CARINATOIDES type (cf. 63). The area with high abundance, however, shows another pattern than in Limacina lesueuri, being found in the boundary currents, the N.