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Infestation of palaemonetes argentinus crustacea caridea palaemonidae with probopyrus oviformis crustacea epicaridea bopyridae i. observations on branchial histopathology and physiology of shrimp



Infestation of palaemonetes argentinus crustacea caridea palaemonidae with probopyrus oviformis crustacea epicaridea bopyridae i. observations on branchial histopathology and physiology of shrimp



Revista del Museo de La Plata Seccion Zoologia 14(154): 65-82



This paper evaluates the incidence of a branchial bopyrid Probopyrus cf. oviformis on the respiratory function of Palaemonetes argentinus. Qualitative and quantitative microanatomic evaluation of the infested branchial chambers and of the control chambers is performed. For this purpose, a zonation is established for the host branchiostegite, four sections being distinguished from the dorsum to the ventrum. In area I-the dorsalmost-there is evidence of direct injury attributed to the buccal pieces of P. cf. oviformis. Parasitary coaction is marked in areas I and II and there is reduction of thickness in internal and external epithelia (42% and 28% of their normal values respectively) of the branchiosteguite as well as reduction in hemolymphatic volume (27% of its normal value). The volume of both epithelia and of the hemolymph tends to reach normal values in areas III and IV (particularly in IV). The whole of the branchial chamber is affected by the presence of the parasite which prevents normal spreading of the branchial filaments. This has a negative effect on gaseous exchange. Oxygen consumption is 20% below normal values even in those specimens which have had the parasite removed. This is related to alteration of the original hydrodynamics of the branchial chamber.

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Accession: 005678552

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