Suleman Ikhuoriah | University of Benin (original) (raw)

Papers by Suleman Ikhuoriah

Journal of Applied Sciences and Environmental Management

Paraquat is a toxic chemical used as a broad spectrum, contact herbicide for aquatic weed control... more Paraquat is a toxic chemical used as a broad spectrum, contact herbicide for aquatic weed control in many countries including Nigeria that has been implicated in many non-target effects in the environment. Clarias gariepinus, an important fish in aquaculture in Nigeria is also used as a bio-indicator species, as it plays an increasing important role in the monitoring of water pollution because it responds with great sensitivity to the changes in the aquatic environment. Therefore, this study investigated the effect of paraquat-based herbicide on the survival C. gariepinus fingerlings. Fingerlings were exposed to three concentrations of paraquat viz 3.44ml, 6.88ml and 13.75ml in tanks of 5 replicates. Percentage mortality was recorded after 24, 48 and 72-hour exposure. Paraquat exhibited a high degree of mortality against fingerlings, but the observed mortality was observed to be concentration and exposure time dependent. All concentrations used were below the manufacturer’s recommen...

Journal of Applied Sciences and Environmental Management, 2019

Freshwater crabs support fishery resources and serve as intermediate host to the major groups of ... more Freshwater crabs support fishery resources and serve as intermediate host to the major groups of animal parasites, hence, this study investigates the prevalence and intensity of parasitic infestation in freshwater crab Sudanonautes africanus, and its relationship to carapace width (CW) by collecting 350 specimens between March, 2007 and January, 2010 from selected rivers in Edo and Delta States. The results showed that a total of 174 (49.71%) individuals were infected with immature stages of nematode and digenean parasites in the 4 study sites. The prevalence of 86.54% was recorded in Iyi-Ekwu River, 65.74% in Oke River and 30.36% in Ikpoba River. However, the least prevalence of 18.18% was recorded in Orogodo River. Data analysis by Kruskal-Wallis, one-way ANOVA reveals there was no statistically significant difference (p>0.05) in prevalence among the four sampling sites. A total of 166 (47.43%) individuals from the four study sites were infected with larval nematodes, while 8 (2.29%) were infected with juvenile trematodes from both Oke and Orogodo Rivers. Result obtained from unpaired t-test indicates that crabs measuring 4 to 6 cm CW had a significantly higher prevalence (p<0.05) of parasitic infections. Furthermore, the intensity of nematode larvae isolated from each crab ranges from 1-25 (mean 5), 1-3 (mean 2), 1-4 (mean 2.3) and 1-6 (mean 2.8) nematodes per crab in Rivers Oke, Ikpoba, Iyi-Ukwu and Orogodo, respectively. The length of nematode larvae ranged from 0.7mm-6mm long with a mean length of 2.4mm. Studies are ongoing to experimentally obtain adults of the nematode larvae and juvenile trematodes for species identification.

Animal Research International, 2016

Zooplankton communities of the River Ossiomo at Ologbo, Niger Delta, Nigeria were investigated fr... more Zooplankton communities of the River Ossiomo at Ologbo, Niger Delta, Nigeria were investigated from April 2012 to December 2012. Three stations were studied from upstream to downstream with a distance of about 2 kilometres between each station. A total of 42 taxa were identified; 11 species of cladocerans, 6 copepods and 5 rotifers in the following order of dominance: copepoda > cladocera > rotifera. A total zooplankton population of 1330 individuals was recorded during the study period. Copepods and cladocera represented the predominant species (51.1% and 43.6% of the total zooplankton community respectively) followed by rofiters (5.3%). Copepods and cladocerans were dominated by both cyclopoid (51.1%) and chydorids (27.8%), respectively. The dominant copepod and cladocera species were Thermocyclops neglectus and Alona eximia representing 33.1% and 15.8% of the total zooplankton, respectively. The calculated diversity indices indicated that station 1 was more diverse followed...

Journal of Applied Sciences and Environmental Management

Paraquat is a toxic chemical used as a broad spectrum, contact herbicide for aquatic weed control... more Paraquat is a toxic chemical used as a broad spectrum, contact herbicide for aquatic weed control in many countries including Nigeria that has been implicated in many non-target effects in the environment. Clarias gariepinus, an important fish in aquaculture in Nigeria is also used as a bio-indicator species, as it plays an increasing important role in the monitoring of water pollution because it responds with great sensitivity to the changes in the aquatic environment. Therefore, this study investigated the effect of paraquat-based herbicide on the survival C. gariepinus fingerlings. Fingerlings were exposed to three concentrations of paraquat viz 3.44ml, 6.88ml and 13.75ml in tanks of 5 replicates. Percentage mortality was recorded after 24, 48 and 72-hour exposure. Paraquat exhibited a high degree of mortality against fingerlings, but the observed mortality was observed to be concentration and exposure time dependent. All concentrations used were below the manufacturer’s recommen...

Journal of Applied Sciences and Environmental Management, 2019

Freshwater crabs support fishery resources and serve as intermediate host to the major groups of ... more Freshwater crabs support fishery resources and serve as intermediate host to the major groups of animal parasites, hence, this study investigates the prevalence and intensity of parasitic infestation in freshwater crab Sudanonautes africanus, and its relationship to carapace width (CW) by collecting 350 specimens between March, 2007 and January, 2010 from selected rivers in Edo and Delta States. The results showed that a total of 174 (49.71%) individuals were infected with immature stages of nematode and digenean parasites in the 4 study sites. The prevalence of 86.54% was recorded in Iyi-Ekwu River, 65.74% in Oke River and 30.36% in Ikpoba River. However, the least prevalence of 18.18% was recorded in Orogodo River. Data analysis by Kruskal-Wallis, one-way ANOVA reveals there was no statistically significant difference (p>0.05) in prevalence among the four sampling sites. A total of 166 (47.43%) individuals from the four study sites were infected with larval nematodes, while 8 (2.29%) were infected with juvenile trematodes from both Oke and Orogodo Rivers. Result obtained from unpaired t-test indicates that crabs measuring 4 to 6 cm CW had a significantly higher prevalence (p<0.05) of parasitic infections. Furthermore, the intensity of nematode larvae isolated from each crab ranges from 1-25 (mean 5), 1-3 (mean 2), 1-4 (mean 2.3) and 1-6 (mean 2.8) nematodes per crab in Rivers Oke, Ikpoba, Iyi-Ukwu and Orogodo, respectively. The length of nematode larvae ranged from 0.7mm-6mm long with a mean length of 2.4mm. Studies are ongoing to experimentally obtain adults of the nematode larvae and juvenile trematodes for species identification.

Animal Research International, 2016

Zooplankton communities of the River Ossiomo at Ologbo, Niger Delta, Nigeria were investigated fr... more Zooplankton communities of the River Ossiomo at Ologbo, Niger Delta, Nigeria were investigated from April 2012 to December 2012. Three stations were studied from upstream to downstream with a distance of about 2 kilometres between each station. A total of 42 taxa were identified; 11 species of cladocerans, 6 copepods and 5 rotifers in the following order of dominance: copepoda > cladocera > rotifera. A total zooplankton population of 1330 individuals was recorded during the study period. Copepods and cladocera represented the predominant species (51.1% and 43.6% of the total zooplankton community respectively) followed by rofiters (5.3%). Copepods and cladocerans were dominated by both cyclopoid (51.1%) and chydorids (27.8%), respectively. The dominant copepod and cladocera species were Thermocyclops neglectus and Alona eximia representing 33.1% and 15.8% of the total zooplankton, respectively. The calculated diversity indices indicated that station 1 was more diverse followed...