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embryonic development in zungaro jahu.the aim of this study was to characterize the embryonic development of zungaro jahu, a fresh water teleostei commonly known as 'jaú'. samples were collected at pre-determined times from oocyte release to larval hatching and analysed under light microscopy, transmission electron microscopy and scanning electron microscopy. at the first collection times, the oocytes and eggs were spherical and yellowish, with an evident micropyle. embryo development took place at 29.4 ± 1.5°c and was divided into ...201727873560
myxobolus cordeiroi n. sp., a parasite of zungaro jahu (siluriformes: pimelodiade) from brazilian pantanal: morphology, phylogeny and histopathology.this work is part of an ongoing investigation into the characteristics of myxozoan parasites of freshwater fish in brazil and was carried out using morphology, histopathology and molecular analysis. a new myxosporea species (myxobolus cordeiroi) is described infecting the jaú catfish (zungaro jahu). fifty jaú specimens were examined and 78% exhibited plasmodia of the parasite. the plasmodia were white and round, measuring 0.3-2.0mm in diameter and the development occurred in the gill arch, skin, ...200919372007
untangling convoluted taxonomy of chambriella rego, chubb & pavanelli, 1999 (cestoda: proteocephalidae), with erection of riggenbachiella n. g. and the description of a new species from pimelodid catfishes in the neotropical region.as part of a complex revision of proteocephalid cestodes parasitic in freshwater bony fishes of the neotropical region, the genus chambriella rego, chubb & pavanelli, 1999 is redefined based on detailed examination of type-specimens and newly collected material of both nominal species of the genus. this examination revealed that the type-species c. agostinhoi (pavanelli & santos, 1992) from zungaro jahu (ihering) (type-host) and z. zungaro (humboldt) is indistinguishable from lenhataenia megacep ...201728220284
structural and ultrastructural description of larval development in zungaro jahu.the zungaro jahu is an important large catfish of the order siluriformes that is in danger of extinction due to habitat destruction. studies on its biology are scarce and the majority relates only to nutrition or parasitology. in order to provide greater information on its morphology and aid husbandry and larviculture studies, the aim of this study was to characterize larval development in z. jahu from hatching to total yolk absorption. samples were collected at pre-established times, processed, ...201728137338
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