Human Impact on the Water Quality and Benthic Macro-Invertebrate Compositions in Ogunpa River, Nigeria

Iyiola, Adams Ovie

doi:10.9734/jaeri/2015/14323

Cited by 3 publications

(4 citation statements)

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“…The male domination in artisanal fishing may be attributed to the fact that women cannot cope with the tedious activities of fishing. The result supports Iyiola (2015) findings that male dominated fishing activities on Ogunpa River at Ibadan. The result indicates that 55.47% of them were within the age range of 40-50 years.…”

Section: Socioeconomic Attributes Of Respondentssupporting

confidence: 88%

Technical efficiency and artisanal fishing households: Any hope in oil extracting locations? Evidence from Nigeria

Gbigbi

2019

EgeJFAS

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Artisanal fishing household’s production is investigated using stochastic frontier analysis through Cobb-Douglas production function, which incorporates an inefficiency effects model. Descriptive statistics and profitability index were also used to analyzed the data collected. One hundred and twenty eight households were randomly picked through multistage techniques in the Niger Delta Region of Nigeria. Primary data were chosen using structured questionnaire and interview schedule. Results indicates that greater part of respondents were males with an average age of 42 years who were married with household size of 6 persons. Very many of them did not belong to cooperative society with high educational level. The result indicates that labour, baits and capital inputs were significantly related to output. The average technical efficiency was 73%. This means that the households can still improve their efficiency level by 27%. The structure of production suggests that the returns to scale was 0.9584. The estimated gamma parameter was 0.9423 and was significant at 5% level. Access to credit, membership of cooperative society and fishing experience had an inverse relationship with technical inefficiency while age, fishing distance, gender, number of trips and oil spill had a direct relationship with inefficiency. Artisanal fishing was found to be profitable with a net farm income of N135261.21 and a benefit cost ratio (BCR) of N1.20k. The major constraint to artisanal fishing was pollution. Therefore, the study calls for policies that increases the security of oil pipelines in order to stem the tide of oil spillage and invariably water pollution.

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Section: Socioeconomic Attributes Of Respondentssupporting

confidence: 88%

Technical efficiency and artisanal fishing households: Any hope in oil extracting locations? Evidence from Nigeria

Gbigbi

2019

EgeJFAS

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“…In water of premium quality, aquatic organisms such as macroinvertebrates can proliferate and render essential ecosystem services such as recycle nutrients, energy relay and serve as carbon sources that support higher trophic levels in many ecosystems (Quintino et al 2006). However, when the water quality declines, these essential services are distorted as macroinvertebrates respond to critical changes in the environment (Idowu and Ugwumba 2005;Iyiola 2015).…”

Section: Discussionmentioning

confidence: 99%

“…Their consistent response to environmental changes, especially to physical and chemical stressors affects the sediment and secondary production (Quintino et al 2006). However, when the water quality declines, these essential services are distorted as macroinvertebrates respond to critical changes in the environment (Idowu and Ugwumba 2005;Iyiola 2015).…”

Section: Discussionmentioning

confidence: 99%

Assessment of benthic macroinvertebrate fauna as bio-indicator and physicochemical characteristics in the Gulf of Guinea off western Nigerian shor

Bassey¹,

Olapoju²,

Yakub³

et al. 2022

TZOOL

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Benthic macroinvertebrates are helpful bio-indicators providing better understanding of modified and perturbed aquatic ecosystems. This study seeks to determine the ecological status and diversity of the macroinvertebrate community in relation to environmental variables in western Nigerian offshore waters within the Gulf of Guinea. Macroinvertebrate samples were collected from five (5) sampling stations using a Van-veen grab following standard protocols. Water samples were collected and the physico-chemical parameters measured onboard using a multi-parameter checker, HORIBA-U53. The physico-chemical parameters of the water varied significantly (p<0.05) between stations. Macoma litoralis (13.71%), Tellina gilchristi (13.71%), and Tellina trilateri (11.71%) were the dominant macroinvertebrate species, while Nassarius cuvierii, Oxystele tigrina Tritia lanceolata Turritella communis, Turritella communis and Orbinia angrapequensis (0.33% each) were the least abundant. Axis 1 (63.73%) and axis 2 (22.32%) of the Canonical Correspondence Analysis (CCA) explained macrobenthic fauna-environmental variables association. Gastropoda showed strong relationship with salinity, silicate, sulphate, TDS and conductivity in Stations 1, 2 and 3. Bivalvia and Scaphopoda showed strong relationship with pH, BOD, water temperature, phosphate and nitrate in Stations 4 and 5. The AZTI Marine Biotic Index (AMBI, 0.85), multivariate AZTI Marine Biotic Index (M-AMBI, 0.80), Bentix Index (5.46) and Biotic Index (BI, 1.00) showed that this section of the Gulf of Guinea is undisturbed.

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“…Aquatic ecosystems are mostly affected by stress imposed by human. Population growth, steep urbanization as well as industrial and agricultural land use have resulted in the discharge of diverse pollutants into water bodies causing a dwindling effect on the aquatic environment and the fisheries (Adeyemo 2003;Iyiola 2015). Lake Asejire was created by impoundment on Osun River at Asejire.…”

Section: Introductionmentioning

confidence: 99%

Diversity, distribution and abundance of fish species in Lake Asejire, Oyo State, Nigeria

Ipinmoroti¹,

Iyiola²

2023

TZOOL

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Aquatic systems in Nigeria have suffered stress induced by human activities which alter the natural composition of the water resources. This study investigated the diversity, distribution and abundance of fish species in Lake Asejire. The lake was partitioned based on accessibility into upper, middle and lower sections for the study. Fish species were sampled using monofilament gill nets with stretched mesh sizes ranging from 44.45-169.33mm. Water and fish species were sampled fortnightly for a period of twelve months. Water quality parameters: temperature (28.96±0.28oC), dissolved oxygen (5.6±0.13mg/l), pH (6.73±0.19) and conductivity (159.8±0.32μS/cm) measured were within suitable standard ranges for fish production in natural waters. A total of 16 species from 10 families were identified from the lake. Cichlids had the highest number of fish species (4) and relative abundance (66.82%) and Coptodon zillii was the most abundant fish species across the months and sampling stations (27.53%). The lower section of the lake had the highest relative abundance (52.90%) while the upper section of the lake had the least (16.14%) and the highest fish catch (13.35%) was in November. The species richness of the lake decreased from lower (S=16) to upper section (S=14), the middle section was highly diversified (H=0.73) with a combined value of H=0.67 for the lake. The fish species were evenly distributed across the lake with the highest evenness in the upper section (E=0.22). Simpson’s index was highest in the lower region (D=0.30) and there was a high probability of picking different fish species at random. Trophic grouping showed forage to carnivore (F/C) ratio of 2.06 indicating an unbalanced fish population based on food habit, which should be addressed. There is need for proper regulation such as enforcement of fishing seasons and fishing across the trophic levels to ensure sustainability of the fish resources in the lake.

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Human Impact on the Water Quality and Benthic Macro-Invertebrate Compositions in Ogunpa River, Nigeria

Cited by 3 publications

References 0 publications

Technical efficiency and artisanal fishing households: Any hope in oil extracting locations? Evidence from Nigeria

Technical efficiency and artisanal fishing households: Any hope in oil extracting locations? Evidence from Nigeria

Assessment of benthic macroinvertebrate fauna as bio-indicator and physicochemical characteristics in the Gulf of Guinea off western Nigerian shor

Diversity, distribution and abundance of fish species in Lake Asejire, Oyo State, Nigeria

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