Journal
DISEASES OF AQUATIC ORGANISMS
Volume 57, Issue 1-2, Pages 177-180Publisher
INTER-RESEARCH
DOI: 10.3354/dao057177
Keywords
Dicentrarchus labrax; crustacean parasite; Lernanthropus kroyeri; histopathology
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Twenty sea bass Dicentrarchus labrax L. from a fish farm (floating cage) in Greece were examined for the presence of parasites. The gills of 7 (35%) fish were infected with adult female specimens of the parasitic copepod Lernanthropus kroyeri van Beneden, 1851, and the intensity of infection ranged from 1 to 24 parasites per host. The most infected portion of the gills appeared to be the primary lamellae. Erosion, desquamation and necrosis of the secondary lamellae were noticed near the site of copepod attachment; furthermore, the terminal claw of the second antennae lacerated tissue and vessels of infected gill. Parasitism by L. kroyeri affected the host's condition factor (mean SE in uninfected vs parasitized; 1.88 +/- 0.04 vs 1.66 +/- 0.12; p < 0.05).
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