| endohelminths in cichla piquiti (perciformes, cichlidae) from the paraná river, são paulo state, brazil. | fifty specimens of cichla piquiti were collected from the paraná river downstream of the ilha solteira hydroelectric power station in brazil and surveyed for endohelminth parasites. all fish were parasitised by at least one helminth species (overall prevalence [p] = 100%). eight parasite taxa were present: the nematode procamallanus (procamallanus) peraccuratus in the intestines; third-stage larvae of the anisakids contracaecum sp. and hysterothylacium sp. in the visceral cavity, mesentery and s ... | 2014 | 24473871 |
| parasites of the fish cichla piquiti (cichlidae) in native and invaded brazilian basins: release not from the enemy, but from its effects. | the enemy release hypothesis is frequently used to explain the success of invaders, postulating that introduced species have escaped from their native enemies, including parasites. here, we tested this hypothesis for the tucunaré (cichla piquiti), a predatory cichlid, and its endoparasites. first, the parasites and their influence on the condition of the hosts in the native environment, the tocantins river (to), were compared to an environment where the fish was introduced, the paraná river (pr) ... | 2013 | 23052767 |