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1.
Braz. j. vet. res. anim. sci ; 47(5): 337-345, 2010. ilus
Article in Portuguese | LILACS | ID: lil-586462

ABSTRACT

A infestação por poliquetas do gênero Polydora em ostras C. gigas de cultivo foi acompanhada por meio de coletas mensais enquanto os parâmetros físico-químicos da água do mar foram monitorados semanalmente. Foi determinada a área total ocupada pelas bolhas e tubos na superfície interna das valvas, observando os possíveis danos às principais características fisiológicas da ostra. Houve prevalência do anelídeo Polydora sp. (Polychaeta: Spionidae) em todos os meses amostrados, chegando a 100% no período de águas mais frias. As análises histológicas mostraram que os tecidos e órgãos estavam intactos, ocorrendo a formação de gametas. Nas ostras severamente infestadas, foi possível observar intensa fibrose na região do manto, mostrando reparo do tecido.


The infestation of polychaetes Polydora in oyster C. gigas within cultivation was accompanied by monthly samples whereas the physical and chemical parameters of seawater were monitored weekly. The total area occupied by bubbles and tubes in the inner surface of the valve was determined, indicating the possible damage to the main physiological characteristics of oysters. It was observed prevalence of annelid Polydora sp. (Polychaeta: Spionidae) in all samples each month, reaching 100% in the period of cooler waters. The histological analysis showed that the tissues and organs were intact, occurring the formation of gametes. In oysters severely infested, it was possible to observe intense fibrosis in the mantle, showing repair of the tissue.


Subject(s)
Animals , Ostreidae/physiology , Annelida , Polychaeta
2.
Rev. cient. (Maracaibo) ; 19(2): 113-118, mar.-abr. 2009. tab
Article in Spanish | LILACS | ID: lil-548720

ABSTRACT

La infestación de moluscos bivalvos de interés comercial por parte de poliquetos espiónidos, especialmente aquellos pertenecientes a los géneros Polydora, Dipolydora y Carazziella, ha sido referida en numerosas ocasiones. Se realizó un estudio sobre la infestación de la ostra de mangle Crassostrea rhizophorae (Guilding, 1828) por el poliqueto espiónido Polydora cf. websteri Hartman, 1943 con el fin de determinar el nivel de infestación y la preferencia del poliqueto por una u otra valva. Se realizaron colectas mensuales (enero-julio) separando manualmente los bivalvos de las raíces de los mangles en la laguna de La Restinga. La presencia, ausencia e intensidad del ataque se registró en ambas valvas de cada individuo, estableciéndose niveles de infestación de acuerdo al número de galerías. El 64,57 por ciento de los bivalvos estaban infestados por el poliqueto. Se encontraron diferencias altamente significativas en la abundancia de galerías entre valvas (ts = 5,786, P < 0,001). No se observó correlación (Pearson) entre la talla y el número de galerías ni entre la biomasa y el número de galerías.


The infestation of mullusks bivalves with commercial importance by spionid polychaetes belonging, mainly, to genera Polydora, Dipolydora and Carazziella, has been recorded in many occasions. A study about of infestation of mangrove oyster Crassostrea rhizophorae (Guilding, 1828) by spionid polychaete Polydora cf. websteri Hartman, 1943 was made in order to determine the level of infestation and the polychaete worm preference by one or the other shell. Monthly samplings (January-July) were made. Bivalves were manually separated of mangroves roots from La Restinga lagoon. Presence or not and attack intensity was recorded in both valves of each specimen in order to establish infestation levels according to galleries spionid abundance. Almost 65 por ciento of bivalves showed infestation by the polychaete. Highly significative differences in the abundance of galleries between valves (ts = 5.786, P < 0.001)were found. Not Pearson correlation between the bivalve size and galleries number, nor biomass and galleries number was observed.


Subject(s)
Animals , Commerce , Mollusca/virology , Polychaeta/virology , Seafood , Marine Biology
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