โ Scribed by Henri J. Dumont
No coin nor oath required. For personal study only.
The biogeography of rotifers is discussed in light of general biogeographical concepts . It is argued that, in spite of considerable abilities for passive dispersal, vicariance can develop well in this group . Examples selected from the Brachionidae illustrate the high levels of endemicity found in Australia and South America, while the Indian subcontinent and Africa have a predominantly cosmopolitan fauna . An explanation for these patterns is found in drifting continents and Pleistocene climatic changes .
๐ SIMILAR VOLUMES
In samples collected from different parts of the Republic of Mali (W-Africa), ninety-two taxa of rotifers were identified. Some were present in different forms; 56% were cosmopolitan, 19% thermophilous with a wide distribution, 20% tropicopolitan and 5% cold-stenothermous. These latter species seem
Development of techniques to maintain viable rotifer clones in a frozen state would preserve the genotype and reduce routine maintenance for those clones not being actively studied . To this end we have frozen Brachionus plicatilis in dimethyl sulfoxide at concentrations ranging from 6% to 18% . Sur
24 plankton samples, collected in different parts of the Republic of Senegal (W . Africa) were examined for their rotifer content . Seventy taxa were identified to species level, some of which were present in different forms . Thirty three taxa and forms are new to Senegal, three species are new to
Species richness and abundance of Diptera and Coleoptera were assessed in nine city parks in Cincinnati, Ohio, USA. Species richness for each park was related to the area of the park in a manner predicted by island biogeography theory. The z values for the Diptera and Coleoptera were 0.235 and 0.222