Tidiani Kone

• Professor at Université Jean Lorougnon Guédé

Video surveillance is a non-extractive and less disruptive method of observing fish in their natural environment. Increasingly used, this technique makes it possible to describe the behaviour of fish in their habitat. In Côte d'Ivoire, the use of waterproof cameras for ichthyological purposes is still not widespread. This study proposes to use vide...

In order to provide basic scientific data essential for the conservation and sustainable management of the Aby-Tendo-Ehy Lagoon complex in South East of Côte d’Ivoire, patterns of shrimps’ community structure in relation to environmental characteristics has been studied in this ecosystem subject to intense anthropogenic pressures, particularly agro...

Aims: The Tanoe-Ehy swamp forest (TESF) is a freshwater swampy area characterized by seasonal variation of environmental parameters and fish diversity. So, the aim of this study was to analyze seasonal variations of growth parameters and condition factors of the three abundant species. Methodology: Specimens were collected by using gill nets and fy...

Background and Objectives: Marine catfish are abundant in the bays of Tabounsou and Sangareah in Republic of Guinea, but the knowledge on their biology is still scanty. The reproductive biology of Arius latiscutatus Günther, 1864 and A. gigas Boulenger, 1911 was studied through monthly sampling, from January to December 2016. Methodology: Fish were...

Aims: Information on ichthyoplankton is an important tool in determining reproduction periods that if associated to environmental variables. The abundance and distribution of ichthyoplankton and their relationships to some environmental variables of the water in Lake Buyo were analyzed. Preferred microhabitats for spawning, dispersion and nursery w...

The blue shark Prionace glauca is the most abundant species in the artisanal driftnet fishery off the coastal waters of Ivory Coast. The reproductive parameters were investigated with the aim of providing basic information on the reproductive biology for fisheries management. A total of 424 specimens (256 males and 168 females) ranging from 170–330...

This paper aims to reveal the organization of and environmental variables affecting the spatial distribution of benthic macroinvertebrates in the River Gambia estuary. Macroinvertebrates were recorded at 3 stations across the River Gambia estuary corresponding to upstream, midstream and downstream stations i.e. Tendaba, Abuko and Wencho respectivel...

The diet of blue shark, Prionace glauca (Linnaeus, 1758), off the coastal waters of Ivory Coast (west Africa) was studied according to sexes, maturity groups and hydrological seasons from August 2014 to November 2016. Stomach contents of 262 specimens ranging from 195 to 320 cm total length caught by artisanal driftnet fishery were analysed. Of the...

Government departments, nongovernmental organizations and generally the local people in the Gambia have little access to climate projections and therefore little understanding of the uncertainties surrounding freshwater climate change impacts and adaptations. This study examines the fisher’s perceptions of climate change on freshwater fisheries and...

Abstract Changes in the testes of frigate tuna specimens were investigated during a yearly-cycle period, from January to December 2004. Most of the individuals examined ranged in size from 25 to 48 cm FL (centimetre fork length). The study shows description of the six-maturity stages of males frigate tuna determined on the basis of the macroscopic...

Objectif : Cette étude se propose d’étudier l’écologie et la diversité des communautés de crevettes dans la Forêt des Marais Tanoé-Ehy (Sud-Est de la Côte d’Ivoire, Afrique de l’Ouest). Méthode et résultats : Les échantillonnages ont été menés mensuellement, d’avril 2012 à mars 2013 à l’aide d’une épuisette et des nasses. Six espèces de crevettes...

Testes of 406 males little tunny (Euthynnus alletteratus), collected over a year period from an artisanal commercial fishery, were used to morphologically and histologically assess patterns of the reproductive biology in this small tuna. Most of the specimens examined ranged in size from 35 to 82 cm FL (centimetre fork length). Observation of slide...

Changes in mangrove vegetation have been identified as important indicators of environmental deterioration. The mangroves of the Tanbi Wetland National Park (TWNP) connect the Atlantic coast with the estuary of the River Gambia and as such, play an invaluable role in the agriculture, tourism and fisheries sectors of The Gambia. Our research seeks t...

Some biological features (length-weight relationship, size at first sexual maturity, eggs variation in diameter, gonado-somatic index, hepato-somatic index, somatic condition and fecundity) and histological characteristics of frigate tuna Auxis thazard were studied. The study was carried out on 496 female fish caught in gillnets and measuring in si...

The role of human activities in degradation of estuarine resources has been well documented. Besides the effects of climate change, activities such as clearing of mangroves for tourism, use of inappropriate fishing gear and excessive use of pesticides for agricultural productivity are the most powerful ecological stressors. In the Sahelian climate...

Objectifs: Cette étude vise à déterminer la distribution spatio temporelle du zooplancton en relation avec les caractéristiques environnementales dans quatre rivières côtières du Sud-est de la Côte d’Ivoire.Méthode et résultats: Le zooplancton a été échantillonné mensuellement de mars 2012 à février 2013 à l’aide d’un filet à plancton de 64 Gm de v...

Zooplankton is essential components of aquatic ecosystem where it contributes to transferring energy and organic matter from the primary producers to the higher trophic level taxa. However, changes in some environmental characteristics strongly influence their diversity and abundance. This work aimed at determining the spatial and seasonal distribu...

383 This article was published in an Sjournals journal. The attached copy is furnished to the author for non-commercial research and education use, including for instruction at the authors institution, sharing with colleagues and providing to institution administration. Other uses, including reproduction and distribution, or selling or licensing co...

The diet of Thysochromis ansorgii (Boulenger, 1901) was studied in the Tanoe-Ehy swamp forest according to fish size and hydrological season. Fish were caught monthly between March 2012 and February 2013 using gillnets and fyke nets. A total of 149 individuals were collected, with standard length and fresh weight ranging, between 45 mm and 110 mm a...

Shrimps are essential components of freshwater ecosystems where they contribute to detritivorous roles and can comprise the majority of macroinvertebrate biomass. However, changes in some environmental characteristics strongly influence their diversity and abundance. Patterns of their community structure in relation to environmental characteristics...

Feeding habits of the catfish Clarias buettikoferi Steindachner, 1894 were studied in the Tanoe-Ehy swamp forest (Côte d'Ivoire). Fishes were caught monthly using fyke nets and gillnets from March 2012 to February 2013.208 fishes were collected, with standard length and weight ranging between 90 and 260 mm, and 7.3 and 132 g, respectively. Mean vac...

Objectif : Le but de l’etude est la connaissance des parametres de la reproduction de Thysochromis ansorgii (Boulenger, 1901) dans la foret des marais Tanoe-Ehy (Cote d’Ivoire) qui est caracterisee par des variations saisonnieres marquees de certaines caracteristiques environnementales Methodologie et resultats : La capture des poissons, effectuee...

Investigations are underway in the Centre de Recherches Océanologiques d'Abidjan (Côte d'Ivoire) to find whether the catfish (Heterobranchus bidorsalis) could be an interesting aquaculture species. Within this framework a 28-day aquarium culture feeding trial was conducted to investigate the effects of three diets (Artemia salina nauplii, beef brai...

Patterns of fish population composition were examined in the San Pedro River, Ivory Coast, in 2001 to assess whether distinct types of assemblage exist along longitudinal gradients within this small coastal basin. A total of 45 species was found: 28 in the lower and the upper courses of the river and 29 in Faé man-made lake. The environmental varia...

The effect of three rearing systems, floating cages, cement tanks and earth ponds, on the growth rate, feeding efficiency and mortality rates of hybrid tilapia — Tilapia zillii (male) × T. guineensis (female) — was evaluated for 233 days. Fish of average weight 12.59g were stocked at a density of 20 fish m−3 and were fed a 30% protein pelleted comm...

La dynamique saisonniere des populations de trois especes de monogenes branchiaux du poisson Sarotherodon melanotheron Ruppel, 1852 a ete etudiee dans le lac du barrage d’Ayame I, situe dans le sud-est de la Cote d’Ivoire. La presente etude, menee entre aout 2004 et juillet 2005, a porte sur 412 poissons. Une etude qualitative et quantitative a ete...

The study of the gill parasites from elephant fish Mormyrus rume Valenciennes, 1846 (Teleostei: Mormyridae) from the Ayamé man-made Lake (Ivory Coast) revealed the presence of three new monogenean species of the genus Bouixella Euzet & Dossou, 1976, which can be mainly distinguished from all other species of the genus by the morphology and the size...

L’étude de la parasitofaune branchiale d’un Mormyridae, Mormyrus rume Valenciennes, 1846 (Teleostei : Mormyridae), capturé dans le lac de retenue d’Ayamé I en Côte d’Ivoire (Afrique de l’Ouest) a révélé la présence de trois Monogènes nouveaux du genre Bouixella Euzet & Dossou, 1976, qui se différencient des autres espèces du genre par la taille et...

Des peuplements zooplanctoniques ont été étudiés le long de deux petits bassins côtiers ivoiriens. Ce sont la rivière Bia, sur laquelle ont été construits les barrages hydroélectriques d\'Ayamé I et II, et la rivière Agnébi dépourvue de barrage sur son cours principal. Le long de la rivière Bia, d\'importantes variations de la richesse spécifique e...

Feeding habits and trophic relationships among three mormyrid species (Petrocephalus bovei, Marcusenius ussheri and Marcusenius furcidens) were assessed in the man-made Lake Ayame in Ivory Coast. The index of preponderance combining the occurrence and weight percentages of the identified prey items showed that these three mormyrid species mainly fe...

La morphologie du tube digestif et le régime alimentaire en fonction du stade de maturité et de la saison de Distichodus rostratus (Günther, 1864) ont été étudiés en milieu naturel entre deux barrages hydroélectriques du fleuve Bandama (Kossou et Taabo). L\'analyse a porté sur 220 individus de longueur standard comprise entre 131 et 610 mm. La desc...

La description de la morphologie du tube digestif des poissons a permis de mettre en évidence chez Pomadasys jubelini (Cuvier, 1830) un estomac développé et un intestin relativement court. Le coefficient intestinal, relativement bas (0,70 < CI < 1,43 pour des poissons dont la longueur standard est comprise entre 75 et 225 mm), a permis de rapproche...

L\'influence du recouvrement des cages flottantes par des bâches plastiques noires non transparentes et de la periode (jour ou nuit) de distribution de l\'aliment sur la survie et la croissance du poisson-chat africain Heterobranchus longifilis a ete evaluee. L\'experience a consiste a observer le jour et la nuit des alevins nourris en quatre repas...

Following the construction of a hydroelectric power dam, the Ayame man-made lake has been created on the Bia River basin (Ivory Coast). The artificial environment of this lake allowed a massive hybridization between Tilapia zillii (Gervais, 1848) and T. guineensis (Bleeker, 1862). These fishes play a noticeable commercial role, as they are regularl...

The feeding habits of Synodontis comoensis (Siluriformes, Mochokidae) have been studied for the first time. Specimens caught in the Comoé River (Comoé National Park, Côte d’Ivoire) had fed on different types of food including insects (Diptera, Ephemeroptera, Hymenoptera, and Isoptera), molluscs (gastropods and bivalves), oligochaetes, and macrophyt...

Reproductive Cycle and Fecondity of Distichodus rostratus (Characiformes, Distichodontidae) in a West African Basin (Bandama River, Ivory Coast). Distichodus rostratus (Günther, 1864) is a commercially important species but its reproductive biology is not well known. Reproductive cycle and fecundity of D. rostratus from the Bandama river have been...

Environnemental Control of Shrimps Communities Structure along a Small West African Basin- Boubo River- Ivory Coast. The relationship between shrimps species and environmental variables were studied in Boubo River, a costal river in Ivory Coast. The river is submitted to the impact of human activities (dam construction and oils factory). This surve...

The effects of shelter made from inert synthetic shade materials on the survival and growth of Heterobranchus longifilis fingerlings were evaluated under cage (1m3) culture conditions in man-made Lake Ayame (Côte d'lvoire) from September 2003 to March 2004 (180 days). In the first experiment, fishes (initial mean weight: 0.9±0.1g; density: 100 fish...

Bahou, L., Koné, T., N'Douba, V., N'Guessan, K. J., Kouamélan, E. P., and Gouli, G. B. 2007. Food composition and feeding habits of little tunny (Euthynnus alletteratus) in continental shelf waters of Côte d'Ivoire (West Africa). – ICES Journal of Marine Science, 64: 1044–1052. The stomach contents of 170 little tunny, Euthynnus alletteratus, sampl...

The main constraint of the culture of the African catfish Heterobranchus longifilis remains the high mortality rate due mainly to cannibalism. Heterobranchus longifilis is generally cultured in earth ponds, tanks and enclosures. Floating cage aquaculture can be an alternative system to these traditional techniques as it may allow predation control....

The effects of shelter made from inert synthetic shade materials on the survival and growth of Heterobranchus longi- filis fingerlings were evaluated under cage (1m 3 ) culture conditions in man-made Lake Ayame (Côte d'Ivoire) from September 2003 to March 2004 (180 days). In the first experiment, fishes (initial mean weight: 0.9±0.1g; density: 100...

Feeding habits and trophic relationships among three mormyrid species (Petrocephalus bovei, Marcusenius ussheri and Marcusenius furcidens) were assessed in the man-made Lake Ayame in Ivory Coast. The index of preponderance combining the occurrence and weight percentages of the identified prey items showed that these three mormyrid species mainly fe...

The present work reports on some chromatic characters and their change with size in two species of Tilapia (T. zillii and T. guineensis) and their first generation hybrids. Successful reciprocal hybridizations between T. zillii and T. guineensis were performed in concrete tanks. The hybrids obtained were viable. The colour patterns of the hybrids a...

Fish community structure in relation with environmental variables was studied in the Mé River (Ivory Coast, West Africa). Fifty-four freshwater fish species belonging to 35 genera and 20 families were listed. Eight of these species were reported for the first time in this river, whereas fifteen species reported earlier were not found in the pres...

Eighty-four sites in the Comoé basin (Côte d'Ivoire, West Africa) were sampled to identify fish assemblages and their relationships with some environmental variables. Seventy-six freshwater fish species were collected from 22 families and 44 genera: 11 marine and/or brackish water species, one introduced species, and one hybrid form. Nine species w...

The species composition and the distribution of fishes in the Gô River (100 km in length) in Côte d'Ivoire have been studied for the first time. The study is a part of a larger study of the fish population in this country in order to evaluate the eventual impact of human activities. Within the upstream-downstream gradient three sampling areas were...

Fish distribution in relation with environmental variables was investigated in the Boubo River, a coastal river in Ivory Coast. Fourty freshwater fish species belonging to 17 families and 26 genera were captured. Five brackish water species, two introduced species and one hybrid complete the list. Seven species are reported for the first time in th...

The diet of the brackish water tilapia Sarotherodon melanotheron is studied in various riverine and lacustrine systems of the Bia River basin (Cte d'Ivoire). Comparison of the diet between sampling sites (upper course, lower course and man-made Lake Ayame) shows significant differences. In the man-made lake, prey described as preferential include A...

Reproduction parameters of a landlocked population of black-chinned tilapia Sarotherodon metanotheron have been studied for 2 years and compared to literature data obtained from their natural environment. Sex-ratio (year 1: 1:2.69; year 2: 1:1.96) is in favour of females and shows seasonal variations. Males mature earlier (year 1:129 mm SL; year 2:...

Reproduction of an estuarine tilapia (Sarotherodon melanotheron Rüppell, 1852) landlocked in a West-African man-made Lake. Reproduction parameters of a landlocked population of black-chinned tilapia Sarotherodon melanotheron have been studied for 2 years and compared to literature data obtained from their natural environment. Sex-ratio (year 1: 1:2...