Tóm tắt
Seasonal distributional patterns of five phyllopods from southwest Texas are similar to those of the same species from more northern latitudes. At both latitudes a primary environmental cue controlling the appearance of phyllopods seems to be temperature. For instance, in Texas Branchinecta packardi was the only cold water species. In addition to the effects of temperature on phyllopod zoogeography, diurnal studies show that high temperatures contribute both directly and indirectly to oxygen depletion in temporary ponds. The comparative tolerance of phyllopods to near anaerobic conditions was as follows: calm shrimp, Caenestheriella setosa > tadpole shrimp, Triops longicaudatus > fairy shrimp, Streptocephalus texanus.
