The life cycle of Bucephalus margaritae Ozaki Ishibashi, 1934 da costa do Estado de Santa Catarina, Brasil

The orange disease is considered the main parasitosis in Perna perna mussel. It is caused by a complex life cycle bucephalid, involving three hosts, among them mollusks and fishes. With the aim of contributing to the knowledge of orange disease in mussel culture, the parasite life cycle was investig...

Full description

Saved in:
Bibliographic Details
Published in:Acta scientiarum. Biological sciences 2010-01, Vol.32 (1), p.71
Main Authors: Marchiori, Natalia da Costa, Magalhaes, Aime Rachel Magenta, Pereira, Jr., Joaber
Format: Article
Language:Spanish
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The orange disease is considered the main parasitosis in Perna perna mussel. It is caused by a complex life cycle bucephalid, involving three hosts, among them mollusks and fishes. With the aim of contributing to the knowledge of orange disease in mussel culture, the parasite life cycle was investigated. Experimental studies and monthly samples in the study area allowed the identification and characterization of the Bucephalus margaritae life cycle. Larvae and adults of B. margaritae were fixed in 5% formaldehyde, stained with Gomori's trichrome, clarified in creosote and mounted in Canada balsam. The cercariae are found in the first intermediate host P. perna inside the sporocysts, which have the form of orange and ramified filaments. The metacercariae encysts in the gills and gill cavity of the second intermediate host, the blenniid Hypleurochilus fissicornis. The definitive host Menticirrhus americanus is infected ingesting blenniids parasitized with metacercariae. The high parasitological indexes of B. margaritae suggests that M. americanus and H. fissicornis act as the main definitive and intermediate hosts, respectively, in the trematode life cycle. The blenniid H. fissicornis is a new intermediate host to the species. Key words: Bucephalus margaritae, Hypleurochilus fissicornis, life cycle, orange disease, Perna perna. A bucefalose e considerada a principal parasitose do mexilhao Perna perna. E causada por um Bucephalidae, de ciclo de vida complexo, envolvendo tres hospedeiros, entre eles, moluscos e peixes. Com o objetivo de se contribuir para o conhecimento da bucefalose em mexilhoes de cultivo, foi investigado o ciclo de vida deste parasito. Estudos experimentais e coletas mensais na area de estudo permitiram caracterizar o ciclo de vida de Bucephalus margaritae. Larvas e adultos do parasito foram fixados em formol 5%, corados com tricromico de Gomori, clarificados em creosoto e montados em laminas permanentes com balsamo do Canada. As cercarias ocorrem no primeiro hospedeiro intermediario P. perna, no interior dos esporocistos que tem a forma de filamentos ramificados e alaranjados. As metacercarias encistam nas branquias e cavidade branquial do segundo hospedeiro intermediario, o blenideo Hypleurochilus fissicornis. O hospedeiro definitivo, Menticirrhus americanus, e infectado quando ingere blenideos com metacercarias. Os elevados indices parasitologicos de B. margaritae sugerem que M. americanus e H. fissicornis sejam os principais hospedeiros
ISSN:1679-9283
1807-863X
DOI:10.4025/actascibiolsci.v32i1.5596