Kolo Yeo | Nangui Abrogoua University (original) (raw)

Papers by Kolo Yeo

Research paper thumbnail of Ants response to mining prospection disturbances across vegetation zones in tropical mountain chains of Mount Nimba, Guinea, West Africa

International Journal of Biological and Chemical Sciences

Research paper thumbnail of Ants response to mining prospection disturbances across vegetation zones in tropical mountain chains of Mount Nimba, Guinea, West Africa

International Journal of Biological and Chemical Sciences

Research paper thumbnail of Detecting intruders: assessment of the anthropophilic ant fauna (Hymenoptera: Formicidae) in the city of Abidjan and along access roads in Banco National Park (Côte d’Ivoire)

Journal of entomology and zoology studies, 2016

Remnant natural habitats within and surrounding urbanized areas are becoming increasingly importa... more Remnant natural habitats within and surrounding urbanized areas are becoming increasingly important for maintaining local biodiversity. We used tuna bait to survey and assess ant community diversity in the ten municipalities of Abidjan city and its included natural habitat of Banco National Park. Although ant communities in urban environment differ generally from the ant fauna found in natural habitat (Banco National Park), we recorded the presence of 20 ant species shared by both habitats. We observed the occurrence of tramp ants and well-adapted urban ant species like Paratrechina longicornis and Tetramorium simillimum along the access roads of this national park. The findings of this study are important as they show the importance of Banco National Park in the conservation of biodiversity in urban areas but also the threat of invasion by anthropophilic species that may influence biodiversity within this park.

Research paper thumbnail of First morphological and molecular confirmed report of the invasive tropical fire ant, Solenopsis geminata (Fabricius, 1804) (Hymenoptera: Formicidae) from Côte d’Ivoire (West Africa)

BioInvasions Records, 2017

Urban ecosystems house artificial infrastructures such as ports, transport stations and commercia... more Urban ecosystems house artificial infrastructures such as ports, transport stations and commercial centres which are often introduction foci for exotic species. The connectivity of these structures to other centres specialised in commodity flows located in urban cores, enhances the accidental transport and spreading of exotic species which can become invasive. Despite this fact, targeted investigations to detect establishment of invasive species in tropical urban landscapes are lacking. A survey conducted on ant communities in 15 cities throughout Côte d'Ivoire (West Africa) allowed us to find the highly invasive tropical fire ant (TFA) Solenopsis geminata for the first time in the country. DNA analysis of mitochondrial cytochrome c oxidase I (COI) of two specimens of S. geminata found that they had a close genetic relationship with specimens from Venezuela. From the 15 towns surveyed throughout Côte d'Ivoire, this ant was discovered only in industrial areas of Abidjan near the port zone suggesting an early stage of invasion.

Research paper thumbnail of Diversity and distribution of introduced and potentially invasive ant species from the three main ecoregions of Côte d’Ivoire (West Africa)

Belgian Journal of Zoology, 2018

An important issue in biodiversity conservation is the early detection of introduced and invasive... more An important issue in biodiversity conservation is the early detection of introduced and invasive organisms and identification of regions that may either be points of introduction or be particularly prone to invasion. Among insects, ants are easily transported worldwide by humans, and several species, such as Solenopsis geminata or Pheidole megacephala, can be highly invasive. To establish an initial baseline for urban ant monitoring in Côte d’Ivoire (Western Africa), fifteen cities - equally distributed over the three main ecoregions of the country - were surveyed using tuna baits as sampling method. A total of 103 ant species from 22 genera and 5 subfamilies were collected. We identified 10 potentially invasive species, amongst them two new species for the country: Solenopsis geminata and Solenopsis globularia. Another highly invasive species, Paratrechina longicornis, was the most abundant species collected throughout the country. Potentially invasive ant species co-occurred with...

Research paper thumbnail of Influence of ant–grass association on soil microbial activity through organic matter decomposition dynamics in Lamto savannah (Côte d’Ivoire)

African Journal of Ecology, 2021

Ants are widely regarded as ecosystem engineers because of their effect on soil structure and on ... more Ants are widely regarded as ecosystem engineers because of their effect on soil structure and on the flow of energy. However, little is known about their influence on the carbon flux in tropical humid savannah. Recent investigations in a humid savannah ecosystem in Lamto showed that ant nests’ association with perennial grasses enhances their growth and productivity. This study aimed at understanding the influence of ant nests on soil micro‐organism's activity beneath grass tufts. The kinetic of mineralisation was tested in laboratory conditions at various times (days 1, 2, 4 and 7) beneath three grass species associated and not associated with ant nests, following the CO2 amount released at 30℃ during soil respiration. The amount of CO2 released from the soil is higher beneath grass tufts associated with ant nests compared with those not associated with ant nest. The highest amount of CO2 released from the soil was found beneath Hyparrhenia diplandra tufts followed by Andropogo...

Research paper thumbnail of Espaces verts comme une alternative de conservation de la biodiversité en villes : le cas des fourmis (Hyménoptère : Formicidae) dans le district d’Abidjan (Côte d’Ivoire)

Journal of Applied Biosciences, 2019

Green areas as an alternative of biodiversity conservation in cities: the case of ants (Hymenopte... more Green areas as an alternative of biodiversity conservation in cities: the case of ants (Hymenoptera: Formicidae) in the district of Abidjan (Côte d'Ivoire) ABSTRACT Objective: This study aims to assess the role of green areas to preserve biodiversity in the district of Abidjan (Côte d'Ivoire). Ants were used as biological indicators in order to examine the influence of anthropogenic activities on biodiversity of these habitats located in urban matrix. Methodology and results: Ants were sampled using tuna bait, ALL Protocol (Pitfalls and Winklers) in three types of green areas (Public green areas, Botanical Gardens and Banco National Park) under two categories of anthropogenic disturbance. Results indicate a strong pollution rate (between 1.7 % and 28.8 %) and a high percentage of illegal occupation (between 1.08% and 52.3%).. These areas shelter a rich ant fauna with 176 species collected. In addition, Botanical garden and public green areas share 8.51 % to 42.55 % of ant species with Banco National Park, although they are not strongly connected. Conclusion and application: This study suggests that the green areas of the Abidjan district have biodiversity conservation assets, especially for ants. However, the illegal occupation of these areas by commercial activities leads to their progressive degradation and the disappearance of animal and plant communities. The results of this study should challenge decision-makers to define a management policy for green areas and urban parks in order to enhance their conservation value of biodiversity in city.

Research paper thumbnail of Checklist of Ant (Hymenoptera: Formicidae) Species from Nyungwe Tropical Rain Forest, South-Western Rwanda

Journal of East African Natural History

Research paper thumbnail of Ant nests effect on organic matter, carbon, and nitrogen flux in the soil under grasses tufts in Lamto savannah (Côte d'Ivoire)

Agrosystems, Geosciences & Environment

Ants are known to contribute to the physical and chemical improvement of the soil. In this contex... more Ants are known to contribute to the physical and chemical improvement of the soil. In this context, the hypothesis put forward is that ants improve the nitrogen (N) supplementation necessary to ensure the high primary production measured in the Lamto savannah. Recent investigations in the humid savannah ecosystem showed that ant nests’ association with perennial grasses enhances their growth, productivity, and microorganism activity. This study aimed at understanding the effect of ant nests on organic matter (OM), carbon (C), and N flux beneath grass tufts. Under each grass tuft chosen to carry out this study, soil samples were taken from the depths of 0–10 cm using an auger at shrubby, clear grassy, and transitional grassy savannah. The analytical method by incineration of the loss on fire was used to determine the OM amount. The Kjeldahl method was used to determine the total N amount in the soil under grass tufts. The results showed that these components’ amount is higher beneath...

Research paper thumbnail of Resistance and resilience of soil biodiversity after tree logging: case studies in rubber plantation in Ivory Coast

Research paper thumbnail of Rapid Survey of the Ants of Ajenjua Bepo and Mamang River Forest Reserves, Ghana

SPIE eBooks, Mar 1, 2009

BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Research paper thumbnail of Socio-economical aspects of the exploitation of <i>Termitomyces</i> fruit bodies in central and southern Côte d’Ivoire: Raising awareness for their sustainable use

Journal of Applied Biosciences, Dec 16, 2013

Objective: Picking fungal fruit bodies is a popular spare time occupation, as well as a source of... more Objective: Picking fungal fruit bodies is a popular spare time occupation, as well as a source of income in many countries. In central and southern Côte d'Ivoire, fruit bodies of the genus Termitomyces are intensively harvested and sold by the local inhabitants. However, information on the dimensions of this trade and on other socioeconomic aspects of the exploitation of these edible mushrooms is lacking. This study aims at (a) investigating the local populations' knowledge about Termitomyces fruit bodies, (b) examining their utilization by identifying the actors involved of their exploitation and (c) determining the factors, explaining income differences among actors of this exploitation and fructification areas. Methodology: Some 240 persons from 12 villages belonging to two sub-ethnic groups (Baoulé and Abbey) were interviewed as to their attitude towards Termitomyces, using a structured survey questionnaire. Thus, we obtained information on Termitomyces fruit bodies' availability, on indigenous knowledge and especially on the modes of utilization as well as on seasonal aspects of their trade. Conclusions: Interviewees had a solid knowledge of edible mushrooms in general and Termitomyces in particular. Four species were recorded in the study area (Termitomyces medius, T. letestui, T. cf. eurhizus and T. fuliginosus). The latter three species were considered as edible. These mushrooms are a key source of cash income, especially for women (traders) and the farmers (harvesters). However, only one species, Termitomyces letestui, is sold through a well-established trade route. Seasonal earnings within this trade route differed among actors, visited villages and phytogeographic zones. These fungi representing a typical Non Timber Forest Products (NTFPs) are menaced by unsustainable depletion. Overharvesting is jeopardizing their persistence as well as that of their dependant termite species. Raising an awareness that prevents their incurring the "tragedy of the commons" by developing a sustainable form of harvest is an essential prerequisite for their long-term preservation.

Research paper thumbnail of Resilience of soil nematodes to logging residue inputs following clear-cutting is site-dependent: a case study in rubber plantations on the Ivory Coast

Research Square (Research Square), Feb 18, 2022

Aims The effect of tree plantations on soil biological functions when they replace tropical fores... more Aims The effect of tree plantations on soil biological functions when they replace tropical forests is detrimental. However, the current trend is to repeat tree plantations on the same land after clear-cutting, with a probable strong disturbance of soil functions. We addressed this question in rubber plantations, one of the world's most important tropical perennial crops, using soil nematode communities as an indicator of soil functioning. We hypothesised that (i) the restitution of logging residues from previous plantations will foster the resilience of the soil nematode community and (ii) this resilience will depend on soil type. Methods An experimental design with different levels of logging residues for the previous rubber plantation and legumes (Pueraria phaseoloides) was set up in two rubber plantations on the Ivory Coast with contrasting soil types. The response of nematodes to clear-cutting was monitored every 6 months over 24 months. Results At both sites, we observed signi cant decreases in nematode abundance, diversity, taxonomic composition, and ecological nematode index six months after rubber tree logging. At the clay site, practices with logging residues led to higher resilience of the total nematode abundance. The ecological indices (enrichment index) in the sandy site were more resilient with logging residue input than without over time. Conclusions Logging residues and legumes input was the most e cient practice for promoting soil nematode biodiversity and mitigating the negative impact of clear-cutting in rubber monocultures after a 40-year rotation. However, soil type determined both the level of resistance and resilience of the nematode community.

Research paper thumbnail of Parasitofauna of Blackchin tilapia Sarotherodon melanotheron (Teleostei: Cichlidae) from Ebrie Lagoon, Côte d’Ivoire

International Journal of Fisheries and Aquatic Studies, May 1, 2021

In this study the ecto and endoparasites infecting Sarotherodon melanotheron were investigated in... more In this study the ecto and endoparasites infecting Sarotherodon melanotheron were investigated in Ebrie Lagoon between February 2019 and November 2019. A total of 108 randomly sampled Sarotherodon melanotheron was procured from fishermen and examined for parasites using standard parasitological methods. The parasites such as Monogenean Cichlidogyrus halinus, C. halli, C. acerbus and Scutogyrus minus), Myxosporea (Myxobolus beninensis, M. diamensis, M. nokouensis and M. sarotherodoni), Copepod (Ergasilus latus and E. sp), Acanthocephalan (Acanthogyrus tilapiae), Nematode (Eustrongylides sp) and the Trematoda (Clinostomum tilapiae and Euclinostomum heterostomum) were recorded. Gill and intestine were respectively the more and the least infected organ by parasites. The intensity of Monogenean, Copepod and Acanthocephalan were positively increased with host body size. In Contrast, the intensity of Myxosporean, Nematode and Trematode did not increase with host standard length. Monogenean and Copepod were more concentrated in male hosts and Myxosporean in female fish. However, no influence of host sex on parasitism level was observed for population of Acanthocephalan, Nematode and Trematode. This could enable the use of appropriate methods to fight against these pathogens, especially in intensive fish farming.

Research paper thumbnail of A Rapid Assessment of the Ants of the Boké Region, Guinea

SPIE eBooks, Aug 1, 2006

BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Research paper thumbnail of Can habitat characteristics of a West African forest‐savanna mosaic landscape model bee community composition?

African Journal of Ecology

Research paper thumbnail of First Data of the Ichthyological Fauna in the Bandama River at the Lamto Scientific Nature Reserve (Côte d'Ivoire, West Africa)

European Scientific Journal, ESJ

Fish species composition and organization of the Bandama River at the scientific nature reserve o... more Fish species composition and organization of the Bandama River at the scientific nature reserve of Lamto have been investigated for the first time. The study was conducted from March 2021 to February 2022. Gillnets and traps were used to collect fish. A total of 41 species belonging to 35 genera, 13 families, and 5 orders were captured. The best-represented orders were the Siluriformes with 5 families and 11 species and the Perciformes with 3 families and 14 species of fish. The Cichlidae, Mormyridae, and Alestidae represented the best diversified family with 13, 5, and 5 species respectively. This study also showed a decrease in the average size of individuals of the main species retained, which could reflect overexploitation of the stocks. The Shannon index (2.21 bits/ind.) and equitability (0.58) values obtained reflect a more or less distribution of individuals by species. These results will make it possible to establish a database for the conservation of this fish population an...

Research paper thumbnail of Mort précoce des nids du termite du genre Macrotermes dans la Réserve Scientifique de Lamto en Côte d’Ivoire : compétition interspécifique ou action de fourmis prédatrices ?

Journal of Applied Biosciences, 2019

Research paper thumbnail of Epidemiology of Gill Monogenean Parasites Infections in Nile Tilapia Oreochromis Niloticus (Teleostei: Cichlidae) from Agneby River, Côte d’Ivoire

European Scientific Journal, ESJ, 2021

The Nile tilapia, Oreochromis niloticus is a fast growing fish and has a great importance for fis... more The Nile tilapia, Oreochromis niloticus is a fast growing fish and has a great importance for fisheries, aquaculture, and screen aquarium in Côte d’Ivoire. Parasitic infections constitute significant economic loss in fish production. The work based on Epidemiology of gill Monogenean parasites of O. niloticus from the Agneby River between August to December 2020, for the first time, was aimed to characterize the physicochemical parameters of this River, to inventory the gill Monogenean species in Nile tilapia, to analyze the parasitism as a function study areas and to highlight the parasite species’ distribution on the gill. A total of 102 specimens of fishes was sampled and examined for parasites. Gill helminthofauna of this fish consisted of Cichlidogyrus cirratus, C. tilapiae, C. halli and Scutogyrus longicornis. Fishes of the Agneby River at Agboville are more infested than the other ones due to environmental conditions. The examination of the two sides of the fish revealed that ...

Research paper thumbnail of Ants Assemblage Method According to an Age Gradient of Mango Orchards in Korhogo (Côte d’Ivoire)

Advances in Entomology, 2020

This study was conducted in the Korhogo region in an age gradient of mango orchards. The goal was... more This study was conducted in the Korhogo region in an age gradient of mango orchards. The goal was to assess diversity and determine the influence of the environment on the composition of these organisms. Sampling was done using pitfall traps, threshing and manual collection. A total of 82 ant species were sampled on all plots. The cultivated plots are richer in ant species than the natural environment. Of the three (3) sampling methods, the Manual Collection proved to be more efficient (eff = 79.52%), followed by threshing (eff = 75.15%) and finally the least effective trap pit (eff = 73.39%). The number of individuals of the species varies according to the environment. The highest value was obtained in the young plot (485 individuals), followed by the intermediate plot (478 individuals), then the older plot (426 individuals) and finally the control plot (320 individuals). The species Camponotus acvapimensis was harvested mainly with 159 individuals. On the other hand, the species Lepisiota sp.1; Camponotus rufigenis, Camponotus sericeus and Oecophylla longinoda were specifically harvested in the control, young, intermediate and aged plots, respectively.

Research paper thumbnail of Ants response to mining prospection disturbances across vegetation zones in tropical mountain chains of Mount Nimba, Guinea, West Africa

International Journal of Biological and Chemical Sciences

Research paper thumbnail of Ants response to mining prospection disturbances across vegetation zones in tropical mountain chains of Mount Nimba, Guinea, West Africa

International Journal of Biological and Chemical Sciences

Research paper thumbnail of Detecting intruders: assessment of the anthropophilic ant fauna (Hymenoptera: Formicidae) in the city of Abidjan and along access roads in Banco National Park (Côte d’Ivoire)

Journal of entomology and zoology studies, 2016

Remnant natural habitats within and surrounding urbanized areas are becoming increasingly importa... more Remnant natural habitats within and surrounding urbanized areas are becoming increasingly important for maintaining local biodiversity. We used tuna bait to survey and assess ant community diversity in the ten municipalities of Abidjan city and its included natural habitat of Banco National Park. Although ant communities in urban environment differ generally from the ant fauna found in natural habitat (Banco National Park), we recorded the presence of 20 ant species shared by both habitats. We observed the occurrence of tramp ants and well-adapted urban ant species like Paratrechina longicornis and Tetramorium simillimum along the access roads of this national park. The findings of this study are important as they show the importance of Banco National Park in the conservation of biodiversity in urban areas but also the threat of invasion by anthropophilic species that may influence biodiversity within this park.

Research paper thumbnail of First morphological and molecular confirmed report of the invasive tropical fire ant, Solenopsis geminata (Fabricius, 1804) (Hymenoptera: Formicidae) from Côte d’Ivoire (West Africa)

BioInvasions Records, 2017

Urban ecosystems house artificial infrastructures such as ports, transport stations and commercia... more Urban ecosystems house artificial infrastructures such as ports, transport stations and commercial centres which are often introduction foci for exotic species. The connectivity of these structures to other centres specialised in commodity flows located in urban cores, enhances the accidental transport and spreading of exotic species which can become invasive. Despite this fact, targeted investigations to detect establishment of invasive species in tropical urban landscapes are lacking. A survey conducted on ant communities in 15 cities throughout Côte d'Ivoire (West Africa) allowed us to find the highly invasive tropical fire ant (TFA) Solenopsis geminata for the first time in the country. DNA analysis of mitochondrial cytochrome c oxidase I (COI) of two specimens of S. geminata found that they had a close genetic relationship with specimens from Venezuela. From the 15 towns surveyed throughout Côte d'Ivoire, this ant was discovered only in industrial areas of Abidjan near the port zone suggesting an early stage of invasion.

Research paper thumbnail of Diversity and distribution of introduced and potentially invasive ant species from the three main ecoregions of Côte d’Ivoire (West Africa)

Belgian Journal of Zoology, 2018

An important issue in biodiversity conservation is the early detection of introduced and invasive... more An important issue in biodiversity conservation is the early detection of introduced and invasive organisms and identification of regions that may either be points of introduction or be particularly prone to invasion. Among insects, ants are easily transported worldwide by humans, and several species, such as Solenopsis geminata or Pheidole megacephala, can be highly invasive. To establish an initial baseline for urban ant monitoring in Côte d’Ivoire (Western Africa), fifteen cities - equally distributed over the three main ecoregions of the country - were surveyed using tuna baits as sampling method. A total of 103 ant species from 22 genera and 5 subfamilies were collected. We identified 10 potentially invasive species, amongst them two new species for the country: Solenopsis geminata and Solenopsis globularia. Another highly invasive species, Paratrechina longicornis, was the most abundant species collected throughout the country. Potentially invasive ant species co-occurred with...

Research paper thumbnail of Influence of ant–grass association on soil microbial activity through organic matter decomposition dynamics in Lamto savannah (Côte d’Ivoire)

African Journal of Ecology, 2021

Ants are widely regarded as ecosystem engineers because of their effect on soil structure and on ... more Ants are widely regarded as ecosystem engineers because of their effect on soil structure and on the flow of energy. However, little is known about their influence on the carbon flux in tropical humid savannah. Recent investigations in a humid savannah ecosystem in Lamto showed that ant nests’ association with perennial grasses enhances their growth and productivity. This study aimed at understanding the influence of ant nests on soil micro‐organism's activity beneath grass tufts. The kinetic of mineralisation was tested in laboratory conditions at various times (days 1, 2, 4 and 7) beneath three grass species associated and not associated with ant nests, following the CO2 amount released at 30℃ during soil respiration. The amount of CO2 released from the soil is higher beneath grass tufts associated with ant nests compared with those not associated with ant nest. The highest amount of CO2 released from the soil was found beneath Hyparrhenia diplandra tufts followed by Andropogo...

Research paper thumbnail of Espaces verts comme une alternative de conservation de la biodiversité en villes : le cas des fourmis (Hyménoptère : Formicidae) dans le district d’Abidjan (Côte d’Ivoire)

Journal of Applied Biosciences, 2019

Green areas as an alternative of biodiversity conservation in cities: the case of ants (Hymenopte... more Green areas as an alternative of biodiversity conservation in cities: the case of ants (Hymenoptera: Formicidae) in the district of Abidjan (Côte d'Ivoire) ABSTRACT Objective: This study aims to assess the role of green areas to preserve biodiversity in the district of Abidjan (Côte d'Ivoire). Ants were used as biological indicators in order to examine the influence of anthropogenic activities on biodiversity of these habitats located in urban matrix. Methodology and results: Ants were sampled using tuna bait, ALL Protocol (Pitfalls and Winklers) in three types of green areas (Public green areas, Botanical Gardens and Banco National Park) under two categories of anthropogenic disturbance. Results indicate a strong pollution rate (between 1.7 % and 28.8 %) and a high percentage of illegal occupation (between 1.08% and 52.3%).. These areas shelter a rich ant fauna with 176 species collected. In addition, Botanical garden and public green areas share 8.51 % to 42.55 % of ant species with Banco National Park, although they are not strongly connected. Conclusion and application: This study suggests that the green areas of the Abidjan district have biodiversity conservation assets, especially for ants. However, the illegal occupation of these areas by commercial activities leads to their progressive degradation and the disappearance of animal and plant communities. The results of this study should challenge decision-makers to define a management policy for green areas and urban parks in order to enhance their conservation value of biodiversity in city.

Research paper thumbnail of Checklist of Ant (Hymenoptera: Formicidae) Species from Nyungwe Tropical Rain Forest, South-Western Rwanda

Journal of East African Natural History

Research paper thumbnail of Ant nests effect on organic matter, carbon, and nitrogen flux in the soil under grasses tufts in Lamto savannah (Côte d'Ivoire)

Agrosystems, Geosciences & Environment

Ants are known to contribute to the physical and chemical improvement of the soil. In this contex... more Ants are known to contribute to the physical and chemical improvement of the soil. In this context, the hypothesis put forward is that ants improve the nitrogen (N) supplementation necessary to ensure the high primary production measured in the Lamto savannah. Recent investigations in the humid savannah ecosystem showed that ant nests’ association with perennial grasses enhances their growth, productivity, and microorganism activity. This study aimed at understanding the effect of ant nests on organic matter (OM), carbon (C), and N flux beneath grass tufts. Under each grass tuft chosen to carry out this study, soil samples were taken from the depths of 0–10 cm using an auger at shrubby, clear grassy, and transitional grassy savannah. The analytical method by incineration of the loss on fire was used to determine the OM amount. The Kjeldahl method was used to determine the total N amount in the soil under grass tufts. The results showed that these components’ amount is higher beneath...

Research paper thumbnail of Resistance and resilience of soil biodiversity after tree logging: case studies in rubber plantation in Ivory Coast

Research paper thumbnail of Rapid Survey of the Ants of Ajenjua Bepo and Mamang River Forest Reserves, Ghana

SPIE eBooks, Mar 1, 2009

BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Research paper thumbnail of Socio-economical aspects of the exploitation of <i>Termitomyces</i> fruit bodies in central and southern Côte d’Ivoire: Raising awareness for their sustainable use

Journal of Applied Biosciences, Dec 16, 2013

Objective: Picking fungal fruit bodies is a popular spare time occupation, as well as a source of... more Objective: Picking fungal fruit bodies is a popular spare time occupation, as well as a source of income in many countries. In central and southern Côte d'Ivoire, fruit bodies of the genus Termitomyces are intensively harvested and sold by the local inhabitants. However, information on the dimensions of this trade and on other socioeconomic aspects of the exploitation of these edible mushrooms is lacking. This study aims at (a) investigating the local populations' knowledge about Termitomyces fruit bodies, (b) examining their utilization by identifying the actors involved of their exploitation and (c) determining the factors, explaining income differences among actors of this exploitation and fructification areas. Methodology: Some 240 persons from 12 villages belonging to two sub-ethnic groups (Baoulé and Abbey) were interviewed as to their attitude towards Termitomyces, using a structured survey questionnaire. Thus, we obtained information on Termitomyces fruit bodies' availability, on indigenous knowledge and especially on the modes of utilization as well as on seasonal aspects of their trade. Conclusions: Interviewees had a solid knowledge of edible mushrooms in general and Termitomyces in particular. Four species were recorded in the study area (Termitomyces medius, T. letestui, T. cf. eurhizus and T. fuliginosus). The latter three species were considered as edible. These mushrooms are a key source of cash income, especially for women (traders) and the farmers (harvesters). However, only one species, Termitomyces letestui, is sold through a well-established trade route. Seasonal earnings within this trade route differed among actors, visited villages and phytogeographic zones. These fungi representing a typical Non Timber Forest Products (NTFPs) are menaced by unsustainable depletion. Overharvesting is jeopardizing their persistence as well as that of their dependant termite species. Raising an awareness that prevents their incurring the "tragedy of the commons" by developing a sustainable form of harvest is an essential prerequisite for their long-term preservation.

Research paper thumbnail of Resilience of soil nematodes to logging residue inputs following clear-cutting is site-dependent: a case study in rubber plantations on the Ivory Coast

Research Square (Research Square), Feb 18, 2022

Aims The effect of tree plantations on soil biological functions when they replace tropical fores... more Aims The effect of tree plantations on soil biological functions when they replace tropical forests is detrimental. However, the current trend is to repeat tree plantations on the same land after clear-cutting, with a probable strong disturbance of soil functions. We addressed this question in rubber plantations, one of the world's most important tropical perennial crops, using soil nematode communities as an indicator of soil functioning. We hypothesised that (i) the restitution of logging residues from previous plantations will foster the resilience of the soil nematode community and (ii) this resilience will depend on soil type. Methods An experimental design with different levels of logging residues for the previous rubber plantation and legumes (Pueraria phaseoloides) was set up in two rubber plantations on the Ivory Coast with contrasting soil types. The response of nematodes to clear-cutting was monitored every 6 months over 24 months. Results At both sites, we observed signi cant decreases in nematode abundance, diversity, taxonomic composition, and ecological nematode index six months after rubber tree logging. At the clay site, practices with logging residues led to higher resilience of the total nematode abundance. The ecological indices (enrichment index) in the sandy site were more resilient with logging residue input than without over time. Conclusions Logging residues and legumes input was the most e cient practice for promoting soil nematode biodiversity and mitigating the negative impact of clear-cutting in rubber monocultures after a 40-year rotation. However, soil type determined both the level of resistance and resilience of the nematode community.

Research paper thumbnail of Parasitofauna of Blackchin tilapia Sarotherodon melanotheron (Teleostei: Cichlidae) from Ebrie Lagoon, Côte d’Ivoire

International Journal of Fisheries and Aquatic Studies, May 1, 2021

In this study the ecto and endoparasites infecting Sarotherodon melanotheron were investigated in... more In this study the ecto and endoparasites infecting Sarotherodon melanotheron were investigated in Ebrie Lagoon between February 2019 and November 2019. A total of 108 randomly sampled Sarotherodon melanotheron was procured from fishermen and examined for parasites using standard parasitological methods. The parasites such as Monogenean Cichlidogyrus halinus, C. halli, C. acerbus and Scutogyrus minus), Myxosporea (Myxobolus beninensis, M. diamensis, M. nokouensis and M. sarotherodoni), Copepod (Ergasilus latus and E. sp), Acanthocephalan (Acanthogyrus tilapiae), Nematode (Eustrongylides sp) and the Trematoda (Clinostomum tilapiae and Euclinostomum heterostomum) were recorded. Gill and intestine were respectively the more and the least infected organ by parasites. The intensity of Monogenean, Copepod and Acanthocephalan were positively increased with host body size. In Contrast, the intensity of Myxosporean, Nematode and Trematode did not increase with host standard length. Monogenean and Copepod were more concentrated in male hosts and Myxosporean in female fish. However, no influence of host sex on parasitism level was observed for population of Acanthocephalan, Nematode and Trematode. This could enable the use of appropriate methods to fight against these pathogens, especially in intensive fish farming.

Research paper thumbnail of A Rapid Assessment of the Ants of the Boké Region, Guinea

SPIE eBooks, Aug 1, 2006

BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Research paper thumbnail of Can habitat characteristics of a West African forest‐savanna mosaic landscape model bee community composition?

African Journal of Ecology

Research paper thumbnail of First Data of the Ichthyological Fauna in the Bandama River at the Lamto Scientific Nature Reserve (Côte d'Ivoire, West Africa)

European Scientific Journal, ESJ

Fish species composition and organization of the Bandama River at the scientific nature reserve o... more Fish species composition and organization of the Bandama River at the scientific nature reserve of Lamto have been investigated for the first time. The study was conducted from March 2021 to February 2022. Gillnets and traps were used to collect fish. A total of 41 species belonging to 35 genera, 13 families, and 5 orders were captured. The best-represented orders were the Siluriformes with 5 families and 11 species and the Perciformes with 3 families and 14 species of fish. The Cichlidae, Mormyridae, and Alestidae represented the best diversified family with 13, 5, and 5 species respectively. This study also showed a decrease in the average size of individuals of the main species retained, which could reflect overexploitation of the stocks. The Shannon index (2.21 bits/ind.) and equitability (0.58) values obtained reflect a more or less distribution of individuals by species. These results will make it possible to establish a database for the conservation of this fish population an...

Research paper thumbnail of Mort précoce des nids du termite du genre Macrotermes dans la Réserve Scientifique de Lamto en Côte d’Ivoire : compétition interspécifique ou action de fourmis prédatrices ?

Journal of Applied Biosciences, 2019

Research paper thumbnail of Epidemiology of Gill Monogenean Parasites Infections in Nile Tilapia Oreochromis Niloticus (Teleostei: Cichlidae) from Agneby River, Côte d’Ivoire

European Scientific Journal, ESJ, 2021

The Nile tilapia, Oreochromis niloticus is a fast growing fish and has a great importance for fis... more The Nile tilapia, Oreochromis niloticus is a fast growing fish and has a great importance for fisheries, aquaculture, and screen aquarium in Côte d’Ivoire. Parasitic infections constitute significant economic loss in fish production. The work based on Epidemiology of gill Monogenean parasites of O. niloticus from the Agneby River between August to December 2020, for the first time, was aimed to characterize the physicochemical parameters of this River, to inventory the gill Monogenean species in Nile tilapia, to analyze the parasitism as a function study areas and to highlight the parasite species’ distribution on the gill. A total of 102 specimens of fishes was sampled and examined for parasites. Gill helminthofauna of this fish consisted of Cichlidogyrus cirratus, C. tilapiae, C. halli and Scutogyrus longicornis. Fishes of the Agneby River at Agboville are more infested than the other ones due to environmental conditions. The examination of the two sides of the fish revealed that ...

Research paper thumbnail of Ants Assemblage Method According to an Age Gradient of Mango Orchards in Korhogo (Côte d’Ivoire)

Advances in Entomology, 2020

This study was conducted in the Korhogo region in an age gradient of mango orchards. The goal was... more This study was conducted in the Korhogo region in an age gradient of mango orchards. The goal was to assess diversity and determine the influence of the environment on the composition of these organisms. Sampling was done using pitfall traps, threshing and manual collection. A total of 82 ant species were sampled on all plots. The cultivated plots are richer in ant species than the natural environment. Of the three (3) sampling methods, the Manual Collection proved to be more efficient (eff = 79.52%), followed by threshing (eff = 75.15%) and finally the least effective trap pit (eff = 73.39%). The number of individuals of the species varies according to the environment. The highest value was obtained in the young plot (485 individuals), followed by the intermediate plot (478 individuals), then the older plot (426 individuals) and finally the control plot (320 individuals). The species Camponotus acvapimensis was harvested mainly with 159 individuals. On the other hand, the species Lepisiota sp.1; Camponotus rufigenis, Camponotus sericeus and Oecophylla longinoda were specifically harvested in the control, young, intermediate and aged plots, respectively.