Physico-Chemical Characteristics and Phytoplankton Abundance of the Lower Niger River, Kogi State, Nigeria

Zakariya, Ali Muhammad

doi:10.9790/2402-0243137

Cited by 10 publications

(11 citation statements)

References 15 publications

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“…Narrow fluctuation of pH was observed during the study period, with the highest average value of 8.7 and a low of 7.3; this observed variation was statics significant between month (p ≤ 0.05) but not between the sites (p ≤ 0.05). pH variation might be caused by discharge of waste water, photosynthesis and other metabolic process [27], and may be attributed to introduction of silt into the river by rain water or due to the mixing of the fast flowing water as it moves down stream [28]. These results match with many other studies of [11,15,[28][29][30][31][32].…”

Section: Resultssupporting

confidence: 86%

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A Study of Phytoplankton Communities and Related Environmental Factors in Euphrates River (between Two Cities: Al-Musayyab and Hindiya), Iraq

Salman¹,

Jawad²,

Nassar³

et al. 2013

JEP

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The phytoplankton communities and related physical-chemical features of the Euphrates River at its middle region inside Iraqi territory were studied during the study period from October 2011 to September 2012. Samples were taken from Al-Musayab district extending to Al-Hindia district. The phytoplankton community (quantitative, qualitative and Chlorophyll-a) have been studied, in addition to many environmental parameters such as temperature, pH, electric conductivity (EC), Salinity (‰), TDS, TSS, dissolved oxygen, BOD 5. A total of 105 phytoplankton taxa belonging to Bacillariophyta (69), Chlorophyta (19), Cynophyta (12), Euglenophyta (3), and Dinophyta (2) were recorded within the present study period. Some algal genera dominated mostly in the study period and sites such as Scendesmus, Melosira, Cymbella, Diatoma, Navicula, Nitiazschia and Syndera. A statistical analysis was done using the canonical correspondence analysis (CCA).

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Section: Resultssupporting

confidence: 86%

“…pH variation might be caused by discharge of waste water, photosynthesis and other metabolic process [27], and may be attributed to introduction of silt into the river by rain water or due to the mixing of the fast flowing water as it moves down stream [28]. These results match with many other studies of [11,15,[28][29][30][31][32].…”

Section: Resultssupporting

confidence: 86%

A Study of Phytoplankton Communities and Related Environmental Factors in Euphrates River (between Two Cities: Al-Musayyab and Hindiya), Iraq

Salman¹,

Jawad²,

Nassar³

et al. 2013

JEP

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“…Cyanobacteria were reported to dominate the phytoplankton community in Lake Victoria (Lung'ayia et al 2000;Mbonde et al 2004;Machiwa et al 2005;Sekadende et al 2005a,b;Hecky et al 2010;Haande et al 2011;Ngupula et al 2011;Cornelissen et al 2014). Similar results indicating the dominance of bacillariophytes in other water bodies has also been reported by Soylu and Gonulol (2010), Zakariya et al (2013) and Gulecal and Temel (2014). The high abundances of cyanophytes and bacillariophytes are apparently attributable to the eutrophic status of Shirati Bay, which favours the existence of only a few groups (Ngupula et al 2011).…”

Section: Discussionsupporting

confidence: 66%

“…Similar results indicating the dominance of bacillariophytes in other water bodies has also been reported by Soylu and Gonulol (), Zakariya et al . () and Gulecal and Temel (). The high abundances of cyanophytes and bacillariophytes are apparently attributable to the eutrophic status of Shirati Bay, which favours the existence of only a few groups (Ngupula et al .…”

Section: Discussionmentioning

confidence: 96%

Temporal patterns in phytoplankton, zooplankton and fish composition, abundance and biomass in Shirati Bay, Lake Victoria, Tanzania

et al. 2017

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Shirati Bay is among the important breeding and nursery sites for major fish species in Lake Victoria. Weekly samplings were conducted to assess the temporal patterns in phytoplankton, zooplankton and fish composition, abundance and biomass in relation to prevailing water quality parameters. The study also determined the influences of plankton dynamics and water quality on the fish catch composition and biomass. It was hypothesized that temporal patterns in the composition, abundance and biomass in the plankton in the bay are controlled by water quality parameters that, in turn, affect the composition and biomass of fish catches. The phytoplankton comprised mainly cyanophytes and bacillariophytes, while the zooplankton were dominated by copepods. The heavy rain season exhibited a significantly higher plankton abundance and biomass than the dry season. The plankton abundances in both seasons exhibited significant positive correlations with water temperature and transparency. The phytoplankton community was controlled by calanoid and cyclopoid species. At higher trophic levels, Lates niloticus juveniles, Oreochromis niloticus juveniles and haplochromines controlled Cladocera and Cyclopoid copepods, while Tilapia rendalli juveniles controlled the Rotifera. This study revealed that Cyanophyta and Bacillariophyta are the dominant phytoplankton, whereas cyclopoids dominate the zooplankton species in the bay. These dominant plankton groups are partly controlled by rainfall, water temperature and transparency. Fish biomass, zooplankton and phytoplankton exhibit a typical predator-prey inverse relationship. Thus, evaluation of the plankton composition, abundance and biomass should be mandatory during fisheries stock assessments to effectively manage the fishery resources in the bay.

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“…However, Garba Arome, & (2006) reported isometric growth pattern for Malapterurus electricus from the Lower Benue River and as well as similar findings on Ethmalosa fimbriata and Ilisha africana from the Nkoro River (Abowei Hart, 2009). Although positive & allometry in Eleiyele was reported by Olanrewaju et al (2017) and in Chrysichthys nigrodigitatus of Epe Lagoon, Nigeria (Fafioye Oluajo, 2005) as & against the results in Ijede and Agbowa lagoons, these might be due to the decline in the population of snakeheads as a result of factors such as unethical fishing, habitat alterations and diseases (Zakariya et al, 2013). The changes in b value of the fishes may be attributed to certain environmental factors such as over fishing, food competition, age, sex, sampling methods, sample size, as well as the prevailing ecological conditions in the water (Obasohan et al, 2012 and Kpogue et…”

Section: Discussionmentioning

confidence: 83%

Length-Weight Relationship and Condition Factor of African Snakehead Parachanna Africana (Steindachner, 1879) From Ijede and Agbowa Lagoons, Lagos State, Nigeria

Adeleke

Adekunle

Lawal

et al. 2020

AJSN

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The knowledge of length-weight relationship parameters has numerous practical applications in fishery research and management. Currently, there is a dearth of information on the growth pattern and state of well-being of Parachanna africana in Ijede and Agbowa Lagoons. This study period was between December 2017, and June 2018 investigated the allometry and condition factor of P. africana inhabiting the Ijede and Agbowa Lagoons, South-western Nigeria. Two hundred fish samples of P. africana was gotten from fishermen at both locations. The length and weight measurements were taken to the nearest centimetres and grams. Descriptive, correlation and regression tools, was used to 2analyse the data collected. Results obtained showed that the length-weight relationship had r values of 0.186, 0.196, 0.191 and 0.341, 0.001, 0.098 for Ijede and Agbowa respectively, at a significant level of P<0.05 for male, female and combined sexes. The b values of 0.193 for Ijede and 0.165 for Agbowa were not significantly different (P> 0.05). The mean condition factors of 0.365 ±0.141 and 0.329±0.169 were obtained in Ijede and Agbowa, respectively. It was observed that the species in both lagoons exhibited negative allometric growth patterns with values 0.365 and 0.330 for Ijede and Agbowa lagoons respectively with no variations in the condition factors of both locations which indicate the need to assess human and domestic activities surrounding these water bodies.

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Physico-Chemical Characteristics and Phytoplankton Abundance of the Lower Niger River, Kogi State, Nigeria

Cited by 10 publications

References 15 publications

A Study of Phytoplankton Communities and Related Environmental Factors in Euphrates River (between Two Cities: Al-Musayyab and Hindiya), Iraq

A Study of Phytoplankton Communities and Related Environmental Factors in Euphrates River (between Two Cities: Al-Musayyab and Hindiya), Iraq

Temporal patterns in phytoplankton, zooplankton and fish composition, abundance and biomass in Shirati Bay, Lake Victoria, Tanzania

Length-Weight Relationship and Condition Factor of African Snakehead Parachanna Africana (Steindachner, 1879) From Ijede and Agbowa Lagoons, Lagos State, Nigeria

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