| an overview of the gyrodactylus (monogenea: gyrodactylidae) species parasitizing african catfishes, and their morphological and molecular diversity. | an overview of gyrodactylus infecting catfishes from the african continent is provided, including new data from sudan, senegal, kenya and mozambique. haptoral sclerite morphometry and nuclear ribosomal dna sequences revealed the presence of eight gyrodactylus species. on senegalese synodontis nigrita, gyrodactylus synodonti n. sp. and gyrodactylus nigritae n. sp. are described. these are the first reports of gyrodactylid parasites from mochokid hosts. from the fins of north african catfish clari ... | 2011 | 21850451 |
| pesticide residues in water, sediment and fish from tono reservoir and their health risk implications. | levels of organochlorine (oc) and organophosphorus (op) pesticide residues in fish, sediments and water and their health risk associated with the consumption of the fish from the tono reservoir, ghana were evaluated. the analytical methods included solvent extraction of the pesticide residues using ultrasound sonication and soxhlet extraction and their subsequent quantification using gc equipped with electron capture detector and pulse flame photometric detector after clean-up on activated silic ... | 2016 | 27818887 |
| heavy metals in fish species from lotic freshwater ecosystem at afikpo, nigeria. | a study was conducted between march 2006 and february 2007 to assess the concentration of fe, zn, cu, mn, pb, and cr in the gills and muscles of six fish species (chrysichthys nigrodigitatus, clarias anguillaris, tillapia zillii, mormyrus rume rume, mormyrus macrophthalmus and mormyrus tapirus) from lotic freshwater ecosystem at afikpo south- east nigeria using atomic absorption spectrophotometer. in all the fish species studied the concentration of metals in the gills was significantly higher t ... | 2010 | 21387908 |
| impact of climate change on the relict tropical fish fauna of central sahara: threat for the survival of adrar mountains fishes, mauritania. | four central sahara mountainous massifs provide habitats for relict populations of fish. in the adrar of mauritania all available data on the presence and distribution of fish come from pre-1960 surveys where five fish species were reported: barbus pobeguini, barbus macrops, barbus mirei, sarotherodon galilaeus, and clarias anguillaris. since 1970, drought has had a severe impact in the adrar where rainfall decreased by 35%. to investigate whether the relict populations of fish have survived the ... | 2009 | 19204792 |
| electric discharges of the african catfishes clarias anguillaris and heterobranchus longifilis. | | 2016 | 21249546 |
| camallanus polypteri n. sp. (nematoda:camallanidae) in freshwater fishes from burkina faso. | camallanus polypteri n. sp.is described from polypterus bichir (type host), synodontis schall and clarias anguillaris in lake tingrela, burkina faso. it differs from the other african species of the subfamily camallaninae parasitizing freshwater fishes, in that it lacks tridents. all species of the subfamily camallaninae that lack tridents differ from the new species by at least one of the two following characters: a greater number of longitudinal ridges on the inner surface of the buccal capsul ... | 1997 | 9204501 |
| cyp1a andother biomarker responses to effluents from a textile mill in the volta river (ghana) using caged tilapia (oreochromis niloticus) andsediment-exposed mudfish (clarias anguillaris). | abstract the ecotoxicological effects of a textile mill effluent were investigated by caging tilapia (oreochromis niloticus) in the volta river, ghana, andby exposing mudfish (clarias anguillaris) to sediment collected from the same river. tilapia were caged for 3 weeks at three locations (0.6, 4, and8 km) downstream from the effluent outlet. mudfish were exposed in the laboratory for 2 weeks to sediment collected from the vicinity of the effluent outlet and8 km downstream. upstream reference lo ... | 1996 | 23888992 |