scholarly journals Food and Feeding Habits of the Bivalve Cardium costatum (Linné, 1758) in the Exclusive Economic Zone of Côte d'Ivoire

2021 ◽  
Vol 10 (9) ◽  
pp. 391-401
Author(s):  
Kouato Fulgence Kouakou Fokouo Kessia Irène ◽  
Agnissan Aka Jean-Paul Otchoumou Atcho
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Feeding Habits ◽  
Feeding Strategy ◽  
Stomach Contents ◽  
Exclusive Economic Zone ◽  
Major Constituent ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Economic Zone

The diet of 400 specimens of Cardium costatum from the exclusive economic zone of Côte d'Ivoire was studied for two years depending on the hydrological seasons and the size of the individuals. Stomach contents were analyzed using frequency of occurrence, numerical frequency, and specific abundance methods. The results obtained show that this bivalve is a planktophagus and also feeds on inert organic matter (detritus) and bacteria. Phytoplankton forms the major constituent of its diet regardless of season and size. However, most immature young people have a specialist feeding strategy for Navicula and mature ones prefer Amphora.

scholarly journals Typologie de la pêche de la langouste verte Panulirus regius, De Brito Capello, 1864 sur le littoral de la Côte d’Ivoire (Afrique de l’Ouest)

2021 ◽  
Vol 15 (4) ◽  
pp. 1573-1580
Author(s):  
Ida Akissi Konan ◽  
Olivier Assoi Etchian ◽  
Basile Kouakou Kouame ◽  
Jean-Noel Yapi ◽  
Angelina Gbohono Loukou ◽  
...  
Keyword(s):  
West Africa ◽  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Cold Season ◽  
Scientific Data ◽  
Exclusive Economic Zone ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Economic Zone ◽  
Afrique De L'ouest

En Côte d’Ivoire, la langouste fait partir des crustacés présents dans les captures de la pêche maritime  artisanale. Cependant, aucune donnée scientifique n’est disponible quant aux acteurs de la pêche de cette protéine. Ainsi, la présente étude a pour objectif de caractériser les acteurs de la pêche à la langouste verte Panulirus regius (De Brito Capello, 1864) pratiquée au niveau de la Zone Economique Exclusive de la Côte d’Ivoire. L’étude a nécessité une enquête le long du littoral sur un effectif de 60 pêcheurs de langouste. Les résultats ont montré que la pêche langoustière est pratiquée essentiellement par les Ivoiriens et les Ghanéens. De plus, la tranche d’âge dominante chez ces pêcheurs est comprise entre 30 et 45 ans chez les Ivoiriens et Ghanéensavec des proportions de 20% et 25%, respectivement. Au niveau de la quantité de la langouste verte pêchée, la grande saison froide a enregistré la plus grande quantité de langoustes capturées.   English title: Fishing typology of the green lobster Panulirus regius, De Brito Capello, 1864 along the coast of Côte d’Ivoire (West Africa) In the Côte d’Ivoire, lobster is part of the crustaceans present in the catches of artisanal maritime fishing. However, no scientific data is available on the actors of the fishery of this protein. Thus, the objective of this study is to characterize the actors of the green lobster Panulirus regius (De Brito Capello, 1864) fishery practised in the Exclusive Economic Zone of the Côte d’Ivoire. The study required a survey along the coastline of 60 lobster fishermen. The results showed that green lobster fishing is mainly practised by citizens of Côte d’Ivoire and Ghana. Fishermen who practised this activity were aged between 30 and 45 years old with percentages of 20% and 25% for citizens of Côte d’Ivoire and Ghana, respectively. In terms of the quantity lobster captured, the largest quantity was recorded on the great cold season.

Food composition and feeding habits of little tunny (Euthynnus alletteratus) in continental shelf waters of Côte d'Ivoire (West Africa)

2007 ◽  
Vol 64 (5) ◽  
pp. 1044-1052 ◽  
Author(s):  
Laurent Bahou ◽  
Tidiani Koné ◽  
Valentin N'Douba ◽  
Kouassi J. N'Guessan ◽  
Essetchi P. Kouamélan ◽  
...  
Keyword(s):  
West Africa ◽  
Continental Shelf ◽  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Feeding Habits ◽  
Fork Length ◽  
Stomach Contents ◽  
Food Composition ◽  
Cote D’Ivoire ◽  
Côte D'ivoire

Abstract 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, sampled between June 2003 and December 2004 were examined. Fish size ranged from 27 to 81 cm fork length, and all fish were caught in gillnets deployed over the continental shelf off Côte d'Ivoire (West Africa). The type and quantity of prey ingested changed seasonally. Outside the major upwelling period the diet was more varied. Overall, fish were the dominant prey of all sizes of little tunny, far exceeding crustaceans, of which shrimps and prawns were commonest but were not found in the stomachs of juveniles (<42 cm FL) or larger adults (≥53 cm FL). Little tunny are carnivorous fish that feed opportunistically. A relationship was found between the size of the prey and the size of the predator.

Feeding habits of the mochokidSynodontis punctiferDaget, 1964, in the Bandama River, Côte d'Ivoire

2012 ◽  
Vol 51 (2) ◽  
pp. 199-205
Author(s):  
Essetchi Paul Kouamélan ◽  
Siaka Berté ◽  
Benié Rose Danielle Aboua
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Feeding Habits ◽  
Cote D’Ivoire ◽  
Côte D'ivoire

scholarly journals Habitudes alimentaires du Coptodon hybride issu des croisements naturels entre Coptodon zillii (Gervais, 1848) et Coptodon guineensis (Günther, 1862) de la lagune Ebrié (Côte d’Ivoire)

2020 ◽  
Vol 13 (7) ◽  
pp. 3307-3319
Author(s):  
Céline Sidonie Koco Nobah ◽  
Kouakou Augustin Kouame ◽  
Safiatou Coulibaly ◽  
Boua Célestin Atse ◽  
Essetchi Paul Kouamelan
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Feeding Habits ◽  
Terrestrial Plants ◽  
Plant Debris ◽  
Mots Clés ◽  
Cote D’Ivoire ◽  
Habitudes Alimentaires ◽  
Relative Index ◽  
Côte D'ivoire

Coptodon hybride est un poisson issu des croisements naturels entre Coptodon zillii X Coptodon guineensis. La présente étude a pour objectif de caractériser les habitudes et les stratégies alimentaires de ce poisson, en fonction de la taille des individus, des stations d’échantillonnage et des saisons hydrologiques dans la lagune Ebrié (Côte d’Ivoire). Sur un total de 323 individus (65< longueur standard ≤ 225 mm) capturés d’août 2014 à juillet 2015 avec des filets maillants, 236 tubes digestifs contenaient des proies et 87 étaient vides (26,93%). L’Indice d’Importance Relative (%IRI) qui prend en compte les pourcentages d’occurrence, numérique et pondérale, a été utilisé pour évaluer l’importance relative des différentes catégories de proies dans les tubes digestifs. Cinq groupes de proies ont été identifiés : insectes, zooplancton, crustacés, phytoplancton et plantes terrestres. Le régime alimentaire de Coptodon hybride est essentiellement constitué de plantes terrestres, surtout de débris végétaux (91,53% de l’IRI). L’analyse du coefficient de corrélation de Spearman montre une variation du régime en fonction de la taille et des stations. Cependant, il n’y a pas d’influences significatives des saisons sur l’alimentation des individus de petites tailles (65-129 mm) et ceux de grandes tailles  (130-225 mm).Mots clés: Habitudes alimentaires, Coptodon hybride, lagune Ebrié, Côte d’Ivoire. English Title: Feeding habits of hybrid Coptodon resulting from natural crosses between Coptodon zillii (Gervais, 1848) and Coptodon guineensis (Bleeker, 1862) in the Ebrié lagoon (Côte d'Ivoire)Hybrid Coptodon is a fish resulting from natural crosses between Coptodon zillii X Coptodon guineensis. The objective of this study is to characterize the feeding habits of this fish, according to the size of individuals, sampling sites and hydrological seasons in the Ebrié lagoon (Côte d'Ivoire). A total of 323 specimens (65< standard length ≤ 225 mm) were captured from August 2014 to July 2015 with gillnets. hundred and thirty-six digestive tracts contained prey and 87 were empty (26.93%). The Relative Index (%IRI), including the occurrence, numerical and weight percentages, was used to assess the importance of the different categories of prey in the digestive tract. Five groups of prey have been insects, zooplankton, crustaceans, phytoplankton and terrestrial plants. The hybrid tilapia’s diet shows terrestrial plants and plant debris (91.53% of IRI). The Spearman correlation coefficient analysis variations as a function of size and sample sites. However, there are no significant seasonal influences diet of small (65-129 mm) and large (130-225 mm) fish.Keywords: Feeding habits, hybrid Coptodon, Ebrié lagoon, Côte d’Ivoire. 

scholarly journals Diet of the Silky Shark Carcharhinus falciformis (Müller & Henle, 1839) in Waters off Côte d’Ivoire (West Africa)

2021 ◽  
pp. 59-69
Author(s):  
Koua Clément N’Gouan ◽  
Kouadio Justin Konan ◽  
Oi Edia Edia
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Feeding Habits ◽  
Rank Correlation ◽  
Research Centre ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Silky Shark ◽  
Carcharhinus Falciformis ◽  
Morisita Index

Aims: This study was to establish the feeding habits of silky shark Carcharhinus falciformis in waters off Côte d’Ivoire. Study design: All stomachs of the specimens were collected using a standard method and analysed at laboratory. Place and Duration of Study: The study of the diet of C. falciformis was carried out at the laboratory of the Oceanological Research Centre (ORC) between April 2019 and August 2020. Methodology: To carry out this study, measurements and extractions of the stomachs of silky sharks were performed using a tape measure and dissection kit. Diet was described using the Index of Relative Importance (%IRI). The food overlap between sexes, size groups and marine seasons were analysed using the Morisita index. Results: A total of 265 specimens ranging in size from 79 to 254 cm total length were used. Of the stomachs examined, 163 individuals had food contents (61.51%), whilst 102 were empty (38.49%). The results indicated that silky shark has epipelagic and mesobathypelagic feeding habits, preying upon a wide number of prey taxa (33 species) but with a diet dominated by teleost fishes, especially Thunnus albacares (60.62%IRI) and Katsuwonus pelamis (33.18%IRI). The Morisita index and the Spearman rank correlation coefficient showed similarity of the diet between sexes (Cλ > 0.60; Rs = 0.776 and p = 0.001 and marine seasons (Cλ > 0.60; Rs = 0.658 and p = 0.001). The juveniles and adults did not show any overlap. The Amundsen graphical (Fig. 3) analysis suggested that silky shark displays specialist feeding behaviour in this area. Conclusion: Diet consisted mainly of T. albacares and K. pelamis, the proportions of which varied according to size and marine seasons. Carcharhinus falciformis is considered to be a specialist predator.

scholarly journals Food and Feeding Habit of Two Mugilidae from Lagoon of Grand-Lahou (Côte d’Ivoire) : Liza dumerili (Steindachner, 1870) and Liza falcipinnis (Valenciennes, 1836)

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Irène Kessia Fokouo Kouakou ◽  
Tiehoua Kone ◽  
Fulgence Kouato ◽  
Konan N'da
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Feeding Habits ◽  
Stomach Contents ◽  
Feeding Habit ◽  
Fish Feed ◽  
Artisanal Fishing ◽  
Cote D’Ivoire ◽  
Food And Feeding ◽  
Pennate Diatoms

Study of the diet and feeding habits of 104 specimens of Liza dumerili (Steindachner, 1870) and 113 specimens of Liza falcipinnis (Valenciennes, 1836) coming from the artisanal fishing of the Grand-Lahou lagoon was carried out over the period from September 2008 to August 2009. Analysis of stomach contents revealed that these two species of fish feed mainly on diatoms and detritus. It appears that these species are phytoplanktonophagous and detritivores. The diet of Liza falcipinnis does not vary according to the size of the individuals. These two species specialize in the consumption of diatoms, particularly pennate diatoms.  

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