Inventaire spécifique et caractéristiques de quelques frayères du lac de Buyo dans le Parc National de Taï (Sud-Ouest Côte d’Ivoire)

N’DRI, Olga Rosemonde; Konan, Yao Aristide; Ida, MONNEY Attoubé; Koné, Tidiani

doi:10.35759/jabs.v145.6

Cited by 6 publications

(16 citation statements)

References 14 publications

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“…In general, the type of sediment is very characteristic of lake environments (Thompson et al, 2017). Similar observations were observed in Lake Buyo where stations with gravel dominated substrates formed a group that was quite distinct from those consisting mainly of sand (N'Dri et al, 2020).…”

Section: Taxasupporting

confidence: 75%

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2021

Int. J. Res. Environ. Stud.

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Lake Ehuikro is used to supply drinking water to Bongouanou City. Some human activities around the lake are established and may have an effect on water quality and aquatic life. This study was conducted to describe for the first time the diversity and the structure of macro-invertebrate communities in this area. Physico-chemical parameters were measured monthly in three sampling sites and the benthic Macroinvertebrates was collected using a Van Veen grab on a total area of 0.5 m 2 per sample. Principal component analysis showed a clear pattern of separation of these three sampling sites according to the substrate type: gravelmud, sand-gravel and sand in E1, E2 and E3 stations, respectively. A total of 3285 aquatic Macroinvertebrates belonging 52 taxa, were recorded and the most dominant taxa were Baetis sp. (19.85%) and Tubifex sp. (11.57%). Multivariate statistical analysis revealed significant differences between the community structure of E1 and E2 samples: the first sample was dominated by 7 taxa including Tubifex sp. and Melanoides tuberculata while the second by 13 species. The Shannon diversity indices showed high value in lake (3.10) reflecting moderately polluted conditions. Significant correlations between Tubifex sp., Biomphalaria pfeifferi, M. tuberculata and depth, transparency, substrate texture and macrophyte (MAC) were found. The present study revealed that the benthic fauna of the lake Ehuikro dominated by pollution-sensitive taxa. These findings provide valuable information that can be used to establish biotic indices to monitor the human disturbance effect on water quality of Lake Ehuikro.

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Section: Taxasupporting

confidence: 75%

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2021

Int. J. Res. Environ. Stud.

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“…Larval occurrence index values and species richness were highest at sites S14 and S16, located in the 70% and 80% silty biotopes and 100% rocky, suggesting the use of these sites as spawning and nursery areas (Bouchoucha, 2016; Desaunay et al, 1981; N'Dri et al, 2020). This preference is about some life conditions such as chemical conditions, and larval prey disponibility.…”

Section: Discussionmentioning

confidence: 99%

“…Substrate percentage composition was estimated by samples of substrate collected using a sediment collection bucket. After collection, the sediments were dried and sieved to assess the particle size composition (Bruton & Gophen, 1992; N'Dri et al, 2020): fine sediment/mud <0.1 mm, sand/silt <2 mm, coarse aggregate/gravel 0.2–2.5 cm, rock/pebbles 2.5–25 cm, boulders >25 cm, uniform surfaces such as rocks, slabs (naturally cemented). The percentage of each substrate component was calculated according to Launois (2011).…”

Section: Methodsmentioning

confidence: 99%

“…A sampling site was considered to be a spawning site for a given species when the number of individuals caught for that species at that site was greater or equal to 10 and the abundance of spawners at sexual maturity stages III, IV and V was above 70% (Heyman & Kjerfve, 2008; N'Dri et al, 2020).…”

Section: Methodsmentioning

confidence: 99%

“…Their protection presupposes first of all that they can be identified. This identification is done by the analysis of the permanent presence of larvae and adults during the breeding season (Bouchoucha, 2016; Heyman & Kjerfve, 2008; Mulimbwa et al, 2022; N'Dri et al, 2020). In Lake Kivu, despite the concentration of almost all ichthyological diversity in the littoral zone, no long‐term scientific study has been devoted to determining the spawning sites there.…”

Section: Introductionmentioning

confidence: 99%

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Identification, location and characterisation of spawning grounds and nurseries in the littoral zone of Lake Kivu (eastern DR Congo)

Mazambi,

Micha,

Kaningini

et al. 2023

Afr J Ecol

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Worldwide biodiversity is on the brink of extinction following the complete disappearance of many forest and freshwater vertebrates. This disappearance is closely linked to the reduction and disturbance of habitats, which should instead benefit from special conservation. In the case of lake ecosystems, fish spawning grounds remain the most vulnerable. This study aims to identify, characterise and locate fish spawning and nursery sites in Lake Kivu for better conservation. Sixteen sampling sites were selected along the shoreline of the Bukavu sub‐basin. Physico‐chemical parameters were measured in situ, and fish were captured using multi‐mesh nets, identified and dissected, gonads observed and sexual maturity stages determined. Twenty‐five fish species were identified, but 17 of these use the selected sampling sites as spawning and/or nursery. Eleven spawning and nine nursery sites were identified and located. Physico‐chemical analyses showed that temperature (F = 2.124, p = 0.011), dissolved oxygen (F = 2.792, p < 0.001), depth (F = 5.915, p < 0.001) and transparency (F = 3.421, p = 0.004) were significantly different, which characterise each site and may be key factors in species distribution between spawning sites. Fish size–weight relationships indicate allometric growths. The results of this research contribute to empirical knowledge of fish spawning grounds.

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Characterization of abiotic variables of the ichthyological spring grounds of the Buyo Dam Lake - Ivory Coast

2024

JCBSC

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Spawning grounds are aquatic habitats used by fish for reproduction. However, the spawning grounds of Lake Buyo in the Taï national Park are exposed to the effects of climate change and hydroelectric development, especially with the impoundment of the Soubré dam downstream of the Buyo dam. The general objective of this study is therefore to make a spatial assessment of the abiotic variables of the ichthyological spawning grounds of the Buyo dam lake. Sampling took place from June 2018 to May 2019 on 11 spawning grounds using a multi-parameter, weighted rope and Secchi disk. Parameters such as temperature, dissolved oxygen, pH, conductivity, depth and transparency were studied. In this study, mean values for temperature (

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Inventaire spécifique et caractéristiques de quelques frayères du lac de Buyo dans le Parc National de Taï (Sud-Ouest Côte d’Ivoire)

Cited by 6 publications

References 14 publications

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Identification, location and characterisation of spawning grounds and nurseries in the littoral zone of Lake Kivu (eastern DR Congo)

Characterization of abiotic variables of the ichthyological spring grounds of the Buyo Dam Lake - Ivory Coast

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