Infestation status of gnathiid isopod juveniles parasitic on Dusky grouper (Epinephelus marginatus) from the northeast Mediterranean Sea
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- Genc, E. Parasitol Res (2007) 101: 761. doi:10.1007/s00436-007-0547-2
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This is the first detailed documented record of Gnathiid isopod praniza larvae infestating dusky grouper, (Epinephelusmarginatus Lowe 1834) in the northeast Mediterranean Sea (36°36′N–36°07′E, 35°52′N–36°25′E). Fish were sampled monthly from Iskenderun Bay during a 3-year period from 2000 to 2003 [N = 468, W ± SD (range) = 503.69 ± 342.35 g (177–2,832 g), TL ± SD (range) = 32.39 ± 9.22 cm (16.1–67.0 cm), Wtotal = 0.213Ltotal2.19, rtotal2 = 0.85]. Juveniles of the Gnathia sp. were only extracted from the epithelium of the buccal cavity. The monthly and seasonal patterns in infestation rates (mean prevalence, P = 27.35% and mean intensity, MI ± SD = 21.35 ± 16.19), and the relationship between length–weight and infested/non-infested fish were calculated. This study suggests that gnathiid parasite has no effect on the growth and general health condition of infested fish, although high intensities were observed in fish.