Interactions between the parasite Probopyrus bithynis (Isopoda, Bopyridae) and one of its hosts, the shrimp Macrobrachium amazonicum (Decapoda, Palaemonidae

Abstract

Of infested M. amazonicum collected in the Lower Tocantins, Para, Brazil, 99.6% carried a single parasite couple in either the right or in the left branchial cavity. The infestation level in the female host population varied between 1.6-7.3% in Cameta and 6.4-54.5% upstream in Acaripucu, affecting respectively 4% and 11% of the total prawn population. Length of the female isopod was positively correlated with the length of its host. -from English summary