OCCURRENCE OF BACTERIA IN THE SKIN, GILLS AND BUCCAL CAVITY OF Psettiae sebae (Cuvier 1829), Pomadasys jubelini (Cuvier, 1830) and Cynoglosus senegalensis (Kaup, 1858) FROM LAGOS LAGOON, NIGERIA
Akinyemi, A. A. and Yekeen, O. A.
Department of Aquaculture and Fisheries Management
University of Agriculture, Abeokuta, Abeokuta, Nigeria
E-mail: adeoluakinyemi@yahoo.com
ABSTRACT
The morphometrics of Psettiae sebae (African moony), Pomadasys jubelini (Grunter) and Cynoglossus senegalensis (Sole) from Lagos lagoon were determined and the bacteria flora in the skin, gills and buccal cavity of the fish species were examined. There were no significant difference in the weight, head length and gill length of the fish sample but there were significant difference (P< 0.05) in the standard length and buccal depth of fish samples. Psettiae sebae recorded the highest mean body weight (148.55 ± 16.76g), Cynoglossus senegalensis recorded the highest mean standard length (24.80 ± 2.32cm), Pomadasys jubelini recorded the highest mean head length (4.53±0.93cm), Psettiae sebae recorded the highest mean gill length (2.83 ± 0.48cm) while Psettiae sebae recorded the highest mean buccal depth (1.58 ± 0.05cm). The highest mean percentage bacterial occurrence of 14.46 ± 0.26 was recorded in the buccal cavity of Psettiae sebae while lowest mean percentage bacteria occurrence of 9.64 ± 0.22 was recorded in the skin of Psettiae sebae.The number of colony forming unit per milligram ranged between 2.81×104 – 3.38×104. The bacteria isolated from the water sample were similar to those of the fish samples except for Clostridium perfrigenes and Vibrio parahaemolyticus. In this study, a total of eighteen (18) bacteria species were isolated from the skin, gills and buccal cavity of Psettiae sebae, Pomadasys jubelini and Cynoglossus senegalensis, twelve (12) of the bacteria species were Gram negative (Enterobacter spp, Pseudomonas spp, Proteus spp, Escherichia coli, Klebsiella spp, Citrobacter spp, Pseudomonas aeruginosa, Alcaligenes spp, Seratia spp, Salmonella spp, Shigella spp, Enterobacter aerogenes) while six (6) bacteria isolates (Staphylococcus aureus, Micrococcus spp, Bacillus spp, Streptococcus pyogen, Streptococcus spp, Staphylococcus epidermidis) were Gram positive. This study confirms the existence of pathogenic bacteria in the fish species (Psettiae sebae, Pomadasys jubelini and Cynoglossus senegalensis) which are of public health significance.
Keywords: Bacteria, Morphometrics, Psettiae sebae, Pomadasys jubelini and Cynoglosus senegalensis