Two new species of Myxozoa from the brain of the green knife fish Eigemannia virescens are described: Myxobolus inaequus sp. n. has an unusually large spore body and extremely unequal polar capsules, and Henneguya theca sp. n. has an attenuated spore encased in a sheath not previously described in other Myxozoa . Only spores of the two species were observed, and infections caused no obvious pat...

A Myxobolus sp., morphologically resembling M. toyamai, M. longisporus, and M. koi, was isolated from the gills of a koi, Cyprinus carpio, that died in an ornamental pond. Large plasmodia were localized within lamellae, causing severe disruption of the normal branchial architecture, sufficient to compromise respiration. Although the case isolate shared several features with the aforementioned s...

as new pathogenic strains are emerging and threatening aquaculture development, myxosporeans (myxozoa) are receiving much attention in recent years. myxosporean taxonomy is traditionally based on morphology of the myxospore stage. molecular data on indian myxosporeans are rare. in this report, the 18s rrna gene sequence of myxobolus cuttacki infecting gill lamellae of minor carp labeo bata (ham...

Three new species of the Afrotropical Tuberepyris are described and illustrated, T. nihilus Azevedo et Mugrabi, sp. nov. (Madagascar), T. codex Azevedo et Mugrabi, sp. nov. (South Africa), and T. hamus Azevedo et Mugrabi, sp. nov. (Central African Republic). The male of Tuberepyris is described for the first time. T. basibrevis Lanes et Azevedo from Tanzania is evaluated and the genus is redefi...

Description of a new species of Diaptomidae (Crustacea, Copepoda, Calanoida) Notodiaptomus oliveirai is given from the material obtained at a reservoir at Barra Bonita, SP in 1992. The new species is very similar to Notodiaptomus henseni Dahl 1894 although both species can be found in the same locality, constituting two distinct populations. Notodiaptomus oliveirai seems to be endowed with grea...

The development of rainbow trout Oncorhynchus mykiss strains that are resistant to whirling disease has shown promise as a management tool for populations in areas where Myxobolus cerebralis is present. However, the physiological effects of the disease on characteristics necessary for fish survival in natural river conditions have not been tested in many of these strains. Five rainbow trout str...

Myxobolus cerebralis caused severe declines in rainbow trout populations across Colorado following its introduction in the 1980s. One promising approach for the recovery of Colorado's rainbow trout populations has been the production of rainbow trout that are genetically resistant to the parasite. We introduced one of these resistant crosses, known as the GR×CRR (cross between the German Rainbo...

This analysis of the introduction of racial theories to Brazil and their reception by Brazilian intellectuals in the late nineteenth/early twentieth centuries looks at miscegenation, racism, and whitening policies through the lenses of two novels that bear witness to the era's mentality: O cortiço (1890; A Brazilian tenement, 1976), by Aluísio Azevedo, and Canaã (1902; Canaan, 1920), by Graça A...

In Tunisia, mugilid and soleid fish species are among the most important resources of the Tunisian lagoons. These fish are of great economic value and they are highly valued for their flesh. Some species of mullet from Tunisian waters, especially Mugil cephalus and Liza ramada, have been found to be infected with several myxosporean species, all of which belonging to the genus Myxobolus Bütschl...