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  • 1
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    Review of crude oil pollution effects on fish and fisheries of Nigerian waters (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24177 | 19325 | 2018-05-13 19:01:32 | 24177 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This paper reviews some adverse effects of crude oil pollution on fish and fisheries in Nigerian waters. The main causes of spillage include blowout, sabotage, corrosion of pipeline, equipment malfunction, operations/maintenance error etc. There are spillage records from 1976 to 1997 with respect to the yearly oil spill incidents, the sizes of spill in relation to the ecological operational areas and the causes of oil spills in relation to sources of oil spill within oil operation. Based on the observation from the analyses of the spillage reports, several steps were recommended in order to reduce the incident of crude oil spillage in Nigeria petroleum industry for the safety of our fragile water bodies and the fisheries resources stock in them.
    Description: Includes: 3 tables.;Also includes: 14 references.
    Keywords: Pollution ; Fisheries ; Nigeria ; Niger Delta ; freshwater environment ; Crude oil ; Pollution effects ; Water quality ; Oil spills ; Pipelines ; Lake fisheries ; Oil pollution ; Pollution surveys ; Pollution control
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 106-109
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  • 2
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    The identity of Schilbe intermedius in Jebba Lake, Nigeria (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24630 | 19325 | 2018-05-22 06:31:54 | 24630 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: This study attempts to ascertain the identity of Schilbe intermedius (Family: Schilbeidae) in Jebba Lake using quantitative (mophometric and meristic) and qualitative (colour and shape) parameters that makes identification easier. One hundred (100) specimens were collected and used for the study. There was relationship between body weight and length of fish (a=0.039, b=2.332, r=5.96). The parameters are similar to description of other authors. There is also absence of adipose fin found in the species, which is due to the geographical location.
    Description: Includes: 14 references.
    Keywords: Ecology ; Fisheries ; Schilbe ; intermedius ; Nigeria ; Jebba Lake ; Morphometric ; Meristic ; Butterffish ; Jebba Lake ; freshwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 256-259
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  • 3
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    Impact of water hyacinth (Eichhornia crassipes) on fish catch in the lower Taylor Creek area of Bayelsa State (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24605 | 19325 | 2018-05-21 12:24:48 | 24605 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The aim of the study was to access the impact of water hyacinth, Eichhornia crassipes on fish catch in the lower Taylor Creek area of Bayelsa State. The experimental approach involved the division of the creek into new stations: infested and non-infested at the littoral zone. Subsequently, the deployment of six Malian traps with dimensions of 70cm diameter and 80cm height were set in each station for a period of six months using groudnut cake as bails. Furthermore, fish caught were counted and identified into families and species. From results, fish species composition obtained from the stations were a total of 9 families and 15 species. However, it was observed that the water hyacinth infested area had the lowest fish catch while the non-infestated area had the highest number of fish catch for both dry and wet season. It is therefore concluded that the invasion of Eichhornia crassipes impacted on fish population and composition.
    Description: Includes: 12 references.
    Keywords: Ecology ; Fisheries ; Nigeria ; Eichhornia crassipes ; Fish catch ; Taylor creek ; Bayelsa ; freshwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 153-155
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  • 4
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    Effect of two fishing baits on catch composition of two traditional fishing traps in the upper Nun River, Niger Delta, Nigeria (2021)
    In:  http://aquaticcommons.org/id/eprint/24193 | 19325 | 2018-05-16 15:07:26 | 24193 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: The effect of two fishing baits on the catch composition of two traditional fishing traps were investigated between January and December, 2011 in the Upper Nun Rivers, Niger Delta. The traps were set at the littoral zone of the river, baited with Groundnut cake and fresh palm fruit. The Malian trap baited with Groundnut cake caught the highest number (31) of fish species with Species Diversity index of 1.00, while Ikara trap without bait caught the least number of fish species with Species Diversity Index of 0.32. The dominant species in the catches of the traps baited with Groundnut Cake were Synodontis sorex (15.45%), Synodontis clarias (10.57%), Clarias gariepinus (8.54%) and Hetcerobranchus bidorsalis (6.50%) in the small mesh sized Malian traps, while the large mesh sized Malian trap, synodontis sorex (9.05%), synodontis clarias (10.55%), Clarias gariepinus (6.03%) and Distichodus brevipinis (6.50%) were dominant. Mormyrus deliciosus was only caught in Malian trap. In both traps baited with fresh palm fruit, Heterobrancus bidorsalis, Clarias gariepinus, Oreochromis niloticus and Tilapia zilli dominated the catches. Traps not baited were dominated by Clariids. A significant difference was also observed in the weights of fish caught with different baits. The results from this study revealed that, groundnut cake is more efficient than fresh palm fruit as bait in catching freshwater fish.
    Description: Includes: 1 table, 1 figure and 2 plates.;Also includes: 14 references.
    Keywords: Fisheries ; Clarias gariepinus ; Heterobranchus bidorsalis ; Oreochromis niloticus ; Tilapia zillii ; Nigeria ; Niger Delta ; Nun River ; freshwater environment ; Bait fishing ; Catch composition ; Trap fishing ; Experimental fishing ; Artisanal fishing ; Trap nets ; Catch statistics ; River fisheries
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 169-173
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  • 5
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    Mesh size selectivity of multifilament gill net at Fakun village, north of Lake Jebba (2021)
    FISON | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/24645 | 19325 | 2018-05-24 09:51:45 | 24645 | Fisheries Society of Nigeria
    Details
    Publication Date: 2021-07-15
    Description: Studies on the mesh size selectivity of multifilament gill net at Fakun village North of Lake Jebba were carried out. Four different sizes (76mm, 101mm, 126mm and 177mm) of multifilament nets were used in the construction of the gill net with hanging ratio 0.5 each. Daily catch from the nets were examined for seven weeks. The fish caught comprised of nine (9) species, belonging to six (6) families. The result of analysis of variance of the number of species caught showed significant difference (P〈0.05) among the different sizes of the gill net. The catch mean weight for each mesh size (76mm, 101mm, 126mm and 177mm), was 266.91, 285.54, 305.10 and 349.02 respectively. Also the relative percentage of number of species caught by each of the mesh size was 39.48% for 76mm, 23.58% for 101mm, 22.44% for 126mm and 14.48% for 177mm, which depicts the selectivity in the catch of the gill nets in this experiment.
    Description: Includes: 7 references
    Keywords: Fisheries ; Nigeria ; Jebba Lake ; Mesh size selectivity ; Gillnet ; Fakun village ; Lake Jebba ; freshwater environment ; automation
    Repository Name: AquaDocs
    Type: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 316-318
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