Genetic Differentiation and Dispersal among Populations of Paratya australiensis (Atyidae) in Rainforest Streams in Southeast Queensland, Australia

• DOI: 10.2307/1467731
• Publication Date: 2006-05-08T06:37:31Z
• Authors: J. M. Hughes; S. E. Bunn; D. M. Kingston; D. A. Hurwood
• Keywords: 0106 biological sciences; 570; 14. Life underwater; 01 natural sciences

We used measures of genetic differentiation at seven allozyme loci to estimate the degree movement a stream invertebrate within and between catchments. Populations Paratya australiensis, common atyid shrimp, were sampled from three rainforest streams each two subcatchments in adjacent drainage systems southeast Queensland. Marked was observed all loci, suggesting extremely limited on small spatial scale. This result is surprising given widespread geographic distribution P. australiensis Australia, its great abundance headwater Queensland, presence planktonic larval stage. Large differences structure occurred streams, some instances those same subcatchment. Even larger seen samples different subcatchments, with alternative alleles being fixed sites. The greatest not, however, as predicted by hierarchy model. extreme structuring remarkably stable over two-year period.