Hydrobiologia

Takeda, Alice Michiyo; Grzybkowska, Maria

doi: 10.1023/a:1003107814225pmid: N/A

The production of Campsurus violaceus nymphs was investigated from October 1987 to September 1988 in the Baía River, a secondary channel of the Paraná River, Brazil. The annual production of this species during this period was 16.48 g dry wt m-2 y-1and the P:B ratio was 4.9. This low ratio compared to other rivers occurred because the Baía River was strongly influenced by the hydrological regime of the Paraná River, where nymphs migrated to avoid adverse conditions in the river during the flood phase.