scholarly journals Feeding Habits of Polynemids: Polydactylus Quadrifilis, Galeoides Decadactylus, and Pentanemus Quinquarius of the Continental Shelf of Grand-Lahou, Côte d’Ivoire

2018 ◽  
Vol 14 (18) ◽  
pp. 122
Author(s):  
Konan Kouassi Sylvain ◽  
Yao Laurent Alla ◽  
Amon Yao Nicolas ◽  
N’da Konan
Keyword(s):  
Food Consumption ◽  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Feeding Habits ◽  
Food Habit ◽  
Older Individuals ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
One Year ◽  
Traditional Fishing

This paper focuses on the threadfins Polydactylus quadrifilis, Galeoides decadactylus, and Pentanemus quinquarius captured by the maritime traditional fishing of Grand-Lahou in Côte d'Ivoire. It aims to determine their feeding habits based on weighing, measuring of body, and intestine height and identification of prey. The specimens of Polydactylus quadrifilis with height lower than 55 cm have an average of 12±1 intestinal filaments, whereas those of height higher than 100 cm have an average of 20±2 of them. This average is constant concerning Galeoides decadactylus (12±2) and Pentanemus quinquarius (11±2), for all height. The specimens of Polydactylus quadrifilis consume mainly fish (74.45%), followed by shrimps (10.06%). The juvenile ones of less than one year prefer shrimps (80.28%), whereas fish are preferred (87.07) by the older individuals. Whatever their age, Galeoides decadactylus and Pentanemus quinquarius mainly consume shrimps in the ratio of 83.11% and 68.75% respectively. The relative yearly food consumption reveals for Polydactylus quadrifilis a quantity of 0.124 T/Km2 /year, whereas that of Galeoides decadactylus is 0.02 T/Km2 /year. As for the specimens of Pentanemus quinquarius, they consume 0.013 T/Km2 /year. Threadfins have very short intestine (IC < 1) relatively to the intestinal coefficient. Their food habit is relating to stomach and intestine capabilities.

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 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 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. 

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.

scholarly journals Sustaining Control of Schistosomiasis Mansoni in Western Côte d’Ivoire: Results from a SCORE Study, One Year after Initial Praziquantel Administration

2016 ◽  
Vol 10 (1) ◽  
pp. e0004329 ◽  
Author(s):  
Rufin K. Assaré ◽  
Yves-Nathan T. Tian-Bi ◽  
Patrick K. Yao ◽  
Nicaise A. N’Guessan ◽  
Mamadou Ouattara ◽  
...  
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Cote D’Ivoire ◽  
Score Study ◽  
Schistosomiasis Mansoni ◽  
Côte D'ivoire ◽  
One Year

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.

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