Structure et diversité taxonomique des peuplements de macroinvertébrés benthiques du réseau hydrographique du bassin du Sebou (Maroc)

Abbou, Fatima; Fahde, Abdelilah

doi:10.4314/ijbcs.v11i4.29

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…The values of above 40% obtained during the rainy season reflect the turbulence of the water during this period of flooding. These results are similar to those of [36] in some urban waterways of the city of Taza, underlining the fact that the low oxygenation of waters in urban areas is due to the high organic loads generated by liquid discharges and leachates from the Taza landfill in Morocco. In conclusion, the low percentages of oxygen saturation reflect the mineralising activity of the bacteria that consume a high volume of oxygen [37,38].…”

Section: Discussionsupporting

confidence: 83%

Effect of Anthropogenic Pressure on the Biodiversity of Benthic Macroinvertebrates in Some Urban Rivers (Yaoundé)

Zemo,

Menbohan,

Atchrimi

et al. 2023

Water

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In Cameroon, the environmental profile is increasingly marked by anarchic urbanisation, which is strongly illustrated by the discharge of waste into the aquatic environment, leading to pollution. Indeed, the tributaries of the Mfoundi and Mefou river basins have nowadays become dumping grounds and receptacles for all kinds of waste, leading to the degradation of water quality and a reduction in biodiversity. This study aims to evaluate the effect of anthropogenic pressure on the biodiversity of benthic macroinvertebrates in three rivers of the Mfoundi basin (Ebogo, Abiergue, and Ako’o). For this purpose, some physicochemical parameters were measured according to standard methods, and benthic macroinvertebrates were collected according to the multihabitat approach. To this end, the physicochemical analyses revealed that the waters of these different streams are slightly basic and poorly oxygenated, with a saturation rate of 9.725 ± 11.74% and significant organic pollution. Biologically, a total of 5793 benthic macroinvertebrates divided into three phyla, eight orders, and more than thirty families were collected, with a population dominated by the order of insects and a low level of diversity dominated by pollutant organisms such as the Chironomidae, Lumbriculidae, and Physidae, which are saprobionts and saprophilous organisms. A redundancy analysis indicated that the main groups of benthic macroinvertebrates obtained were related to the gradients of the physicochemical parameters measured. The Shannon–Weaver diversity and Piélou equitability indexes showed the low diversity of the organisms within the different courses and their low equipartition, mainly due to the saprobiont and saprophilous groups that dominate the population. The exogenous inputs due to the increase in the population of the city of Yaoundé, which dumps its waste into the waterways, have major repercussions on the quality of the water and the population that abounds in this environment, particularly the benthic macroinvertebrates, which are an important link in the monitoring of water quality.

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Section: Discussionsupporting

confidence: 83%

Effect of Anthropogenic Pressure on the Biodiversity of Benthic Macroinvertebrates in Some Urban Rivers (Yaoundé)

Zemo,

Menbohan,

Atchrimi

et al. 2023

Water

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“…Le ramassage de L. varicus concerne aussi bien les adultes que les enfants contrairement à ce qui a été rapporté pour les achatines où la cueillette est principalement effectuée par les enfants (Sodjinou et al, 2001). Les perturbations anthropiques conduisent à la prolifération de la faune secondaire dont les mollusques (Abbou et Fahde, 2017 ;Yoboue et al, 2018 ;Allouko et al, 2021) qui sont majoritairement des hôtes intermédiaires dans la transmission de parasites (Opeyemi, 2009;Gbocho et al, 2015 ;Pinaud, 2017 ;Sanou et al, 2019). Ainsi, l'abondance de L. varicus dans la BVO serait liée à la perturbation anthropique de ce milieu.…”

Section: Abondance Et Importance Socioéconomique De Lanistes Varicusunclassified

Exploitation de l’escargot aquatique Lanistes varicus (Müller, 1774) dans la Basse Vallée de l’Ouémé au Bénin, Afrique de l’Ouest

Akele¹,

Aboh²,

Idoleke³

et al. 2022

Int. J. Bio. Chem. Sci

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L’escargot aquatique Lanistes varicus est activement exploité dans la Basse Vallée de l’Ouémé au Bénin à cause de sa chair qui est très appréciée par les consommateurs. Cependant, les données relatives à l’importance socio-économique de son exploitation sont quasi inexistantes. Pour évaluer l’abondance et étudier l’importance socio-économique de cet escargot, une enquête a été réalisée de juin à aout 2017 auprès des populations de la Basse Vallée de l’Ouémé au Bénin. Des observations directes et des mesures sur le terrain ont porté sur les techniques de collecte, les quantités exploitées (comptage et pesé des escargots) et la commercialisation de l’escargot. La technique de collecte utilisée dans la vallée de Ouémé est le ramassage à la main de l’escargot dans les plaines inondables. Elle est une activité réalisée essentiellement par les femmes et les enfants. Lanistes varicus est plus abondant en période de crue (densité : 7235 sujets/hectare) qu’avant crue (densité : 5360 sujets/hectare).Le poids moyen individuel de cet escargot a varié de 26,9 à 31,2 g. L’escargot ramassé sert à la consommation domestique et la commercialisation sur le marché sous régional d’Azowilissè. Le prix moyen de cession est de 80 FCFA/kg pendant la crue contre 90 FCFA/kg avant crue. L’exploitation de L. varicus constitue une activité génératrice de revenus pour les femmes et les enfants pendant la crue où les activités de champs sont réduites à cause de l’inondation. La biologie et l’écologie de L. varicus doivent être étudiées en vue de sa domestication. The aquatic snail Lanistes varicus is actively exploited in the Lower Ouémé Valley of Benin because of its meat, which is highly valued by consumers. However, data on the socio-economic importance of the exploitation of this species are lacking. To assess the abundance and study the socio-economic importance of this snail, a survey was carried out from June to August 2017 among the populations of the Lower Ouémé Valley in Benin. Direct observations and field measurements focused on collection techniques, quantities exploited (counting and weighing of snails) and marketing of the snail. The collection technique used in the Ouémé Valley is snail collection in the flood plains by hand. It is an activity carried out mainly by women and children. Lanistes varicus is more abundant during the flood period (density: 7235 subjects/hectare) than before the flood (density: 5360 subjects/hectare). The average individual weight of this snail varied from 26.9 to 31.2 g. The snail collected is used for domestic consumption and marketing on the Azowilissè sub-regional market. The average selling price was 80 FCFA/kg during the flood, compared to 90 FCFA/kg before the flood. The exploitation of L. varicus constitutes an income-generating activity for women and children during the flood when field activities are reduced due to the flood. The biology and ecology of L. varicus need to be studied for domestication.

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“…Acheta) was found in the bed sediment in this study. In fact, Acheta are pollution resistant taxa often parasitic of invertebrates, of the large faunistic group of Annelids, proliferating favorably in humid environments of high degree of organic pollution (Abbou & Fahde, 2014). Thus, these organisms would have been transported on the reactors by higher animals, attracted by the plants, and would have favorably swarmed the planted reactors, because of the strong vegetation cover of the latter.…”

Section: Macroinvertebrates Communities:-mentioning

confidence: 99%

Vegetation Effect Upon Macroinvertebrate Communities in a Vertical-Flow Constructed Wetland Treating Domestic Wastewater.

Zahui¹

2018

IJAR

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Structure et diversité taxonomique des peuplements de macroinvertébrés benthiques du réseau hydrographique du bassin du Sebou (Maroc)

Cited by 6 publications

References 5 publications

Effect of Anthropogenic Pressure on the Biodiversity of Benthic Macroinvertebrates in Some Urban Rivers (Yaoundé)

Effect of Anthropogenic Pressure on the Biodiversity of Benthic Macroinvertebrates in Some Urban Rivers (Yaoundé)

Exploitation de l’escargot aquatique Lanistes varicus (Müller, 1774) dans la Basse Vallée de l’Ouémé au Bénin, Afrique de l’Ouest

Vegetation Effect Upon Macroinvertebrate Communities in a Vertical-Flow Constructed Wetland Treating Domestic Wastewater.

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