Gymnorhynchus gigas in Lepidopus caudatus (Actinopterygii: Perciformes: Trichiuridae): Prevalence and Related Effects on Fish Quality
2014
Giarratana, F., University of Messina (Italy). Dept. of Veterinary Science | Muscolino, D., University of Messina (Italy). Dept. of Veterinary Science | Beninati, C., University of Messina (Italy). Dept. of Veterinary Science | Ziino, G., University of Messina (Italy). Dept. of Veterinary Science | Giuffrida, A., University of Messina (Italy). Dept. of Veterinary Science | Trapani, M., University of Messina (Italy). Dept. of Veterinary Science | Panebianco, A., University of Messina (Italy). Dept. of Veterinary Science
We evaluated the effects of Gymnorhynchus gigas on the freshness and hygienic quality of Lepidopus caudatus. Total Volatile Basic Nitrogen (TVB-N), Trimethylamine Nitrogen (TMA-N), as well as Specific Spoilage Organisms (SSOs) are the most important freshness indicators in fish. Our study was carried-out on 65 specimens of L. caudatus kept in ice and stored at 2 deg C for different period of time. The microbiological charge of SSOs recovered on a portion of parasitised muscles (MP) was compared with those recovered on portions of parasite-free muscles (M). The contents of TVB-N and TMA-N on MP, M, and G. gigas larva/ae were measured using the Conway microdiffusion method. High prevalence (72.31%) of G. gigas in the specimens of L. caudatus from the Mediterranean sea was observed. No statistically significant differences (P less than 0.05) between M and MP were found during storage. However, massive infestation of G. gigas on the muscle of the silver scabbardfish could negatively influence TVB-N values, without compromising the sensorial characteristic of fish.
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