Collected reprints: Abstract 3376

Collected reprints

Abstract

Vervoort, D.; Redant, F.; Declerck, D. (1980). Causes and incidence of the "black spot disease" on brown shrimp (Crangon crangon). ICES Shellfish Commitee, C.M. 34: 1-10

Different aspects of the "black spot disease" of brown shrimp (Crangon crangon) were investigated: the primary cause of the disease, the eventual influence of chitinoclastic bacteria on the formation and progress of the black spots, the influence of moulting on the progress of the spots, the occurrence of black spots on individual shrimps, the incidence of the disease among the population of shrimps in the Belgian coastal waters and the possible causative factors under natural circumstances. The results of aquarium experiments and of observations on a natural population indicate that physical damage of the exoskeleton, caused by primary cause for the formation of black spots. The "disease" seems not to be of pathological origin. Secondary pathological manifestations however may occur.

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