Microbial resistance to antibiotics is a global problem that threatens the lives of millions of people and affects several sectors, including aquaculture. The aim of the present study is to contribute to the monitorin...Microbial resistance to antibiotics is a global problem that threatens the lives of millions of people and affects several sectors, including aquaculture. The aim of the present study is to contribute to the monitoring of multi-resistant enterobacterial strains circulating in fish ponds in the Sud-Comoé region of south-eastern Côte d’Ivoire, more specifically in the Aboisso and Tiapoum departments. To this end, 20 samples of Tilapia fish (Oreochromis niloticus) and 60 samples of farm water were collected from 5 fish farms in the Sud-Comoé region. Microbiological analyses were based on the isolation and identification of enterobacteria on Mac Conkey + Ceftazidime medium. These analyses resulted in the isolation of 73 strains of enterobacteria, including 58 from fish and 15 from fish pond water samples. Antibiotic sensitivity tests carried out on enterobacteria isolated from water and fish samples showed high levels of resistance (100%) to the beta-lactam family (Amoxicilin + clavulanic acid, Ceftazidime). Klebsiella pneumoniae and Enterobacter spp. showed resistance to Ciprofloxacins (100%) and (25%) respectively. The study also showed that strains of Enterobacteriaceae were resistant to all 3 families of antibiotics, notably Beta-lactams, Fluoro-quinolones and Aminosides. The presence of multi-resistant Enterobacteriaceae in fish and pond water samples represents a public health risk.展开更多
Microplastics, a prevailing modern contaminant, were detected on fish caught in Brgy. Mayangdan and Brgy. Tabunan, Borongan City, Eastern Samar. Fish samples were collected from markets and barangays, with 1 represent...Microplastics, a prevailing modern contaminant, were detected on fish caught in Brgy. Mayangdan and Brgy. Tabunan, Borongan City, Eastern Samar. Fish samples were collected from markets and barangays, with 1 representative species per species, irrespective of location. The digestive channel, including the gills, was utilized as an anatomy of concern in fishes as the digestive systems are used in the feeding process while gills are primarily exposed to the water around them. Results found a few microplastics, mostly micro fragments that are irregularly shaped and colored either red or transparent/white. This concludes the presence of microplastics in the area of the two barangays in Borongan City. Therefore, it is highly recommended that the presence of microplastics in the water and mangrove areas of the said barangay be assessed to lessen the contamination of water systems with different plastic garbage.展开更多
Phylogeny of the sinipercine fishes, their relationships with some fossils and their systematic position were studied in this paper. Consisting of 2 sister groups, the sinipercine fishes were grouped as 2 genera - Cor...Phylogeny of the sinipercine fishes, their relationships with some fossils and their systematic position were studied in this paper. Consisting of 2 sister groups, the sinipercine fishes were grouped as 2 genera - Coreoperca and Siniperca, while the genus Coreosiniperca was unwarranted for its type being a member in Siniperca, Having many special characters, Tungtingichthys was denied as the ancestor of the sinipercine fishes, however, Siniperca wusiangensis was taken as one member in Siniperca and some fossil percoids found in Japan had close relationship with sinipercine fishes. All characters of the sinipercine fishes are not concordant with that in Serranidae or Percichthyidae which leads to the conclusion that either the sinipercine fishes are not in Percichthyidae, or the defining characters of Percichthyidae listed by Gosline (1966) are wrong. But at present, we can only put the sinipercine fishes in Percichthyidae.展开更多
文摘Microbial resistance to antibiotics is a global problem that threatens the lives of millions of people and affects several sectors, including aquaculture. The aim of the present study is to contribute to the monitoring of multi-resistant enterobacterial strains circulating in fish ponds in the Sud-Comoé region of south-eastern Côte d’Ivoire, more specifically in the Aboisso and Tiapoum departments. To this end, 20 samples of Tilapia fish (Oreochromis niloticus) and 60 samples of farm water were collected from 5 fish farms in the Sud-Comoé region. Microbiological analyses were based on the isolation and identification of enterobacteria on Mac Conkey + Ceftazidime medium. These analyses resulted in the isolation of 73 strains of enterobacteria, including 58 from fish and 15 from fish pond water samples. Antibiotic sensitivity tests carried out on enterobacteria isolated from water and fish samples showed high levels of resistance (100%) to the beta-lactam family (Amoxicilin + clavulanic acid, Ceftazidime). Klebsiella pneumoniae and Enterobacter spp. showed resistance to Ciprofloxacins (100%) and (25%) respectively. The study also showed that strains of Enterobacteriaceae were resistant to all 3 families of antibiotics, notably Beta-lactams, Fluoro-quinolones and Aminosides. The presence of multi-resistant Enterobacteriaceae in fish and pond water samples represents a public health risk.
文摘Microplastics, a prevailing modern contaminant, were detected on fish caught in Brgy. Mayangdan and Brgy. Tabunan, Borongan City, Eastern Samar. Fish samples were collected from markets and barangays, with 1 representative species per species, irrespective of location. The digestive channel, including the gills, was utilized as an anatomy of concern in fishes as the digestive systems are used in the feeding process while gills are primarily exposed to the water around them. Results found a few microplastics, mostly micro fragments that are irregularly shaped and colored either red or transparent/white. This concludes the presence of microplastics in the area of the two barangays in Borongan City. Therefore, it is highly recommended that the presence of microplastics in the water and mangrove areas of the said barangay be assessed to lessen the contamination of water systems with different plastic garbage.
文摘Phylogeny of the sinipercine fishes, their relationships with some fossils and their systematic position were studied in this paper. Consisting of 2 sister groups, the sinipercine fishes were grouped as 2 genera - Coreoperca and Siniperca, while the genus Coreosiniperca was unwarranted for its type being a member in Siniperca, Having many special characters, Tungtingichthys was denied as the ancestor of the sinipercine fishes, however, Siniperca wusiangensis was taken as one member in Siniperca and some fossil percoids found in Japan had close relationship with sinipercine fishes. All characters of the sinipercine fishes are not concordant with that in Serranidae or Percichthyidae which leads to the conclusion that either the sinipercine fishes are not in Percichthyidae, or the defining characters of Percichthyidae listed by Gosline (1966) are wrong. But at present, we can only put the sinipercine fishes in Percichthyidae.
