The present study was carried out in three different pond locations in Owerri West (namely Belior... more The present study was carried out in three different pond locations in Owerri West (namely Beliorck aquatic limited Obinze as Pond A, Eddvic integrated farm limited Ihiagwa as Pond B and Urban fish farm Avu as Pond C), to identify, determine and compare the prevalence of Endo-parasites of Clarias gariepinus. Of the 60 Clarias gariepinus samples analyzed and examined for Endo-parasites by taking a smear of their internal organs for examinations using staining method (Giemsa stain), 5 Endo-parasites were identified and isolated belonging to 3 taxas namely Nematode: Contracaecum sp (11.67%), Camallanus sp (48.33%), Protozoa: Cryptobia iubilans (40%), Trypanosoma sp (35%), Acanthocephalans: Acanthocephalus sp (21.67%). Pond C was found to harbour higher number of Endo-parasites than pond A and pond B. The intestine, stomach, liver and kidney were examined for Endo-parasites of which the stomach (with Pond A 60%, Pond B 40% and Pond C 80%) accounted as the organs with the most Endo-parasitic invasion. Bigger fishes were observed to harbor higher Endo-parasites than the smaller ones.
The present study assessed the toxic effects of Diazepam (Valinex-5) on liver and gill tissues of... more The present study assessed the toxic effects of Diazepam (Valinex-5) on liver and gill tissues of Clarias gariepinus. Fish were exposed to sublethal concentrations of 2.67, 5.34, 10.68, 21.36, and 42.72mg.L-1 for 28days. Liver and gill tissues were sampled on day 7, 14, 21 and 28. Results showed that lipid peroxidation (LPO), superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GR) and glutathione peroxidase (GPx) in both tissues was significantly (p<0.05) elevated in the treated groups when compared to control. LPO, SOD, CAT and GPx showed tissue specific response to diazepam as their activities were more pronounced in the gill than the liver during the experimental run. Diazepam elicited in both tissues significantly (p<0.05) decreases in glucose and protein. Changes in the antioxidant enzyme activities indicated that Diazepam caused oxidative damage in the tissues. The formation of oxygen radicals might be a factor in the toxicity of Diazepam
The present study was conducted for a period of one year from April 2016 to March 2017 to identif... more The present study was conducted for a period of one year from April 2016 to March 2017 to identify the present status and threats to fish diversity in the wetlands of Chhatak, Bangladesh. A total of 71 fish species, including prawn under 11 orders and 25 families were recorded from the wetlands. Cypriniformes (32.38%) was the most dominant order, followed by Siluriformes (25.35%), Perciformes (19.72%), Synbranchiformes and Channiformes (5.63%), Clupeiformes (4.23%), Decapoda (4.23%), Beloniformes (2.82%), Osteoglossiformes (2.82%), Tetraodontiformes (1.41%) and Cyprinodontiformes (1.41%). Cyprinidae was the most dominant family contributing 20 species. The recorded species were categorized on the basis of availability into four statuses and found as available (40.85%), less available (29.58%), rare (14.08%) and very rare (15.49%). The present study suggested that use of appropriate fishing gears, establishment of the sanctuary, community based fisheries management, stocking of commercially important fish species, implementation of fishing laws and regulation, Government support and fishermen's awareness can save the valuable fish diversity of the study area.
The rare triseriate auger shell Triplostephanus triseriatus (Gray, 1834) is reported from Chennai... more The rare triseriate auger shell Triplostephanus triseriatus (Gray, 1834) is reported from Chennai and is only the fourth report to Indian waters. Shell is extremely elongated, very narrow and sculptured. Spiral ridge is round beaded/ noded in the upper part with whorls of two rows of large beads/nodes and a single row small rounded bead/node at the lower part. Columella yellowish orange in colour. The shell description, characteristics, and information on its earlier records are dealt in detail.
The present study was carried out in three different pond locations in Owerri West (namely Belior... more The present study was carried out in three different pond locations in Owerri West (namely Beliorck aquatic limited Obinze as Pond A, Eddvic integrated farm limited Ihiagwa as Pond B and Urban fish farm Avu as Pond C), to identify, determine and compare the prevalence of Endo-parasites of Clarias gariepinus. Of the 60 Clarias gariepinus samples analyzed and examined for Endo-parasites by taking a smear of their internal organs for examinations using staining method (Giemsa stain), 5 Endo-parasites were identified and isolated belonging to 3 taxas namely Nematode: Contracaecum sp (11.67%), Camallanus sp (48.33%), Protozoa: Cryptobia iubilans (40%), Trypanosoma sp (35%), Acanthocephalans: Acanthocephalus sp (21.67%). Pond C was found to harbour higher number of Endo-parasites than pond A and pond B. The intestine, stomach, liver and kidney were examined for Endo-parasites of which the stomach (with Pond A 60%, Pond B 40% and Pond C 80%) accounted as the organs with the most Endo-parasitic invasion. Bigger fishes were observed to harbor higher Endo-parasites than the smaller ones. Keywords: Endo-parasites, selected Ponds, Clarias gariepinus, Parasites prevalence, invasion and infestation
The present study was carried out in three different pond locations in Owerri West (namely Belior... more The present study was carried out in three different pond locations in Owerri West (namely Beliorck aquatic limited Obinze as Pond A, Eddvic integrated farm limited Ihiagwa as Pond B and Urban fish farm Avu as Pond C), to identify, determine and compare the prevalence of Endo-parasites of Clarias gariepinus. Of the 60 Clarias gariepinus samples analyzed and examined for Endo-parasites by taking a smear of their internal organs for examinations using staining method (Giemsa stain), 5 Endo-parasites were identified and isolated belonging to 3 taxas namely Nematode: Contracaecum sp (11.67%), Camallanus sp (48.33%), Protozoa: Cryptobia iubilans (40%), Trypanosoma sp (35%), Acanthocephalans: Acanthocephalus sp (21.67%). Pond C was found to harbour higher number of Endo-parasites than pond A and pond B. The intestine, stomach, liver and kidney were examined for Endo-parasites of which the stomach (with Pond A 60%, Pond B 40% and Pond C 80%) accounted as the organs with the most Endo-parasitic invasion. Bigger fishes were observed to harbor higher Endo-parasites than the smaller ones.
The present study assessed the toxic effects of Diazepam (Valinex-5) on liver and gill tissues of... more The present study assessed the toxic effects of Diazepam (Valinex-5) on liver and gill tissues of Clarias gariepinus. Fish were exposed to sublethal concentrations of 2.67, 5.34, 10.68, 21.36, and 42.72mg.L-1 for 28days. Liver and gill tissues were sampled on day 7, 14, 21 and 28. Results showed that lipid peroxidation (LPO), superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GR) and glutathione peroxidase (GPx) in both tissues was significantly (p<0.05) elevated in the treated groups when compared to control. LPO, SOD, CAT and GPx showed tissue specific response to diazepam as their activities were more pronounced in the gill than the liver during the experimental run. Diazepam elicited in both tissues significantly (p<0.05) decreases in glucose and protein. Changes in the antioxidant enzyme activities indicated that Diazepam caused oxidative damage in the tissues. The formation of oxygen radicals might be a factor in the toxicity of Diazepam
The present study was conducted for a period of one year from April 2016 to March 2017 to identif... more The present study was conducted for a period of one year from April 2016 to March 2017 to identify the present status and threats to fish diversity in the wetlands of Chhatak, Bangladesh. A total of 71 fish species, including prawn under 11 orders and 25 families were recorded from the wetlands. Cypriniformes (32.38%) was the most dominant order, followed by Siluriformes (25.35%), Perciformes (19.72%), Synbranchiformes and Channiformes (5.63%), Clupeiformes (4.23%), Decapoda (4.23%), Beloniformes (2.82%), Osteoglossiformes (2.82%), Tetraodontiformes (1.41%) and Cyprinodontiformes (1.41%). Cyprinidae was the most dominant family contributing 20 species. The recorded species were categorized on the basis of availability into four statuses and found as available (40.85%), less available (29.58%), rare (14.08%) and very rare (15.49%). The present study suggested that use of appropriate fishing gears, establishment of the sanctuary, community based fisheries management, stocking of commercially important fish species, implementation of fishing laws and regulation, Government support and fishermen's awareness can save the valuable fish diversity of the study area.
The rare triseriate auger shell Triplostephanus triseriatus (Gray, 1834) is reported from Chennai... more The rare triseriate auger shell Triplostephanus triseriatus (Gray, 1834) is reported from Chennai and is only the fourth report to Indian waters. Shell is extremely elongated, very narrow and sculptured. Spiral ridge is round beaded/ noded in the upper part with whorls of two rows of large beads/nodes and a single row small rounded bead/node at the lower part. Columella yellowish orange in colour. The shell description, characteristics, and information on its earlier records are dealt in detail.
The present study was carried out in three different pond locations in Owerri West (namely Belior... more The present study was carried out in three different pond locations in Owerri West (namely Beliorck aquatic limited Obinze as Pond A, Eddvic integrated farm limited Ihiagwa as Pond B and Urban fish farm Avu as Pond C), to identify, determine and compare the prevalence of Endo-parasites of Clarias gariepinus. Of the 60 Clarias gariepinus samples analyzed and examined for Endo-parasites by taking a smear of their internal organs for examinations using staining method (Giemsa stain), 5 Endo-parasites were identified and isolated belonging to 3 taxas namely Nematode: Contracaecum sp (11.67%), Camallanus sp (48.33%), Protozoa: Cryptobia iubilans (40%), Trypanosoma sp (35%), Acanthocephalans: Acanthocephalus sp (21.67%). Pond C was found to harbour higher number of Endo-parasites than pond A and pond B. The intestine, stomach, liver and kidney were examined for Endo-parasites of which the stomach (with Pond A 60%, Pond B 40% and Pond C 80%) accounted as the organs with the most Endo-parasitic invasion. Bigger fishes were observed to harbor higher Endo-parasites than the smaller ones. Keywords: Endo-parasites, selected Ponds, Clarias gariepinus, Parasites prevalence, invasion and infestation
Uploads
Papers by UZODINMA OKOYE
Keywords: Endo-parasites, selected Ponds, Clarias gariepinus, Parasites prevalence, invasion and infestation
Keywords: Endo-parasites, selected Ponds, Clarias gariepinus, Parasites prevalence, invasion and infestation