Reproductive cycles in some freshwater amphipods in southern Australia

Reproduction patterns in three populations of southern Australian amphipods were examined to investigate the suggestion that a basic difference exists in reproduction patterns between northern hemisphere and southern hemisphere stream invertebrates.The species considered were Pseudomoera gabrieli, sampled in Sassafras Creek, Victoria, and Austrochiltonia australis, sampled at Dandenong Creek, Victoria, and Aldgate Creek, South Australia.The former species showed continuous breeding, the latter, seasonal.These results, together with a review of published studies, indicated that for Amphipoda no such basic reproductive difference exists.