Régime alimentaire de Scomberomorus tritor (Cuvier, 1831) dans le Golfe de Guinée

Diaha, Constance N’guessan; N'da, Konan; Soro, Yaya

doi:10.4314/ijbcs.v4i3.60482

Cited by 6 publications

(6 citation statements)

References 4 publications

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“…Thus, the study of the reproduction of C. crysos has shown that the laying period, which takes place from February to March, July and October, is also the period when the emptiness coefficient reaches its maximum. In fact, the increase in gonad weight can compress the digestive tract, reduce the bolus and cause the fish to feed less 20 . At the family level, Cavolinida (Cavolinia tridentata) were most important prey numerous (52.33%) and frequency of occurrence (42.31%).…”

Section: Results and Discusionmentioning

confidence: 99%

Diet of Caranx crysos (Mitchill, 1815) catch by purse seiner in Atlantic Ocean.

2019

jcbsc

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The diet study included specimens of Caranx crysos caught by seiners in the East Atlantic Ocean. A total of 579 stomachs were examined. 501 stomachs were against 78 full. Which corresponds to the vacuity equal to 86.53%. The index of vacuity varied during the year. The highest values of this index were observed in April, June and July are 100%. The lowest was recorded in January with 16.67%. The vacuity recorded in males (59.08%) is greater than that of females (40.52%) (² = 17.33, p <0.05). Indeed, the index of vacuity varied in individuals at different sexual stages. Stage VI individuals have zero, while stage III have the highest vacuity at 93.1%. Analysis of the 78 full stomachs revealed that C. crysos diet consisted of teleost, gastropods, cephalopods, crustaceans, annelids and phytoplankton. On the basis of the indices of relative importance (IRI), teleost constitute the preferential preys of C. crysos with % IRI = 59.33. The gastropods are their secondary prey (% IRI = 38.16). Cephalopods (% IRI = 0.26), crustaceans (% IRI = 2.23), annelids (% IRI = 0.003) and phytoplankton (% IRI = 0.014) are occasional prey items. The diet of males identical to that of females. However, the diet of C. crysos varies according to the sexual stage of the individuals. C. crysos is classified as a piscivore.

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Section: Results and Discusionmentioning

confidence: 99%

Diet of Caranx crysos (Mitchill, 1815) catch by purse seiner in Atlantic Ocean.

2019

jcbsc

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“…These changes in individuals' diets are due to the increase in nutritional needs during their development. In addition, ontogenic changes that are coupled with an increase in size, lead to the emergence of new physiological and ecological requirements in individuals (Paugy and Lévêque, 2006;Diaha et al, 2010) due to morphological and anatomical changes, particularly in the digestive system. Thus, the increase in size of fish preys is explained by the fact that a reduced number of preys provide much more energy (Paugy and Lévêque, 2006).…”

Section: Discussionmentioning

confidence: 99%

Food and feeding habits of Hemichromis fasciatus Peters, 1857 and Heterotis niloticus (Cuvier, 1829) in lake Ehuikro (Côte d’Ivoire)

Kouadio¹,

Konan²,

Yao³

et al. 2020

Int. J. Bio. Chem. Sci

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The main of this study was to compare the diet of Hemichromis fasciatus (Perciformes, Cichlidae) and Heterotis niloticus (Osteoglossiformes, Arapaimidae) in Lake Ehuikro (Bongouanou, Ivory Coast). Ffish were caught using gillnets between July 2017 and June 2018. A total of 206 stomachs of H. fasciatus and 71 stomachs of H. niloticus were examined and the relative importance index (RI) was used to analyze the importance of different items. Results indicate that both species are omnivorous tending towards insectivorous with a predominance of Chaoboridae. Despite the overlap obtained in diet of both species (Cλ = 0.89), the ecological niche was small and wide in H. fasciatus and H. niloticus, respectively. Dietary variations indicated ontogenic changes in the first specie and seasonal changes in the second specie. Proportion of mineral fraction observed in stomach contents suggests pelagic feeding behavior in H. fasciatus and benthic behavior in H. niloticus.Keywords: Diet, fish, omnivorous, insectivorous, ecological niche.

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“…Stomach analysis of P. leonensis showed, that the vacancy coefficient is relatively low (23.78%). The low rate of this coefficient indicates, according to Diaha et al (2010), the availability of preys. It is more important for the samples collected in the Taabo city area than those of Antonio.…”

Section: Discussionmentioning

confidence: 99%

Food and feeding behavior of Pellonula leonensis (Boulenger, 1916) in Taabo Lake catchment areas (Bandama; Cote d’Ivoire)

Ahoutou¹,

Dietoa²,

Costa³

et al. 2020

Int. J. Bio. Chem. Sci

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Food and feeding behavior of P. leonensis was studied by analyzing the stomach contents of 864 individuals caught in the two main catchment areas in Taabo Lake, notably, at Taabo city and Antonio. Food items data were analyzed by using the three following methods: Relative Importance Index (IRI), Food Index of Geistdoerfer (Q) and Principal Component Analysis of Occurrence Index. The results of our study showed, that P . leonensis is zooplanktonophagus. Its diet also includes Diptera (Ceratopogonidae, Chaoboridae), Ephemeroptera (Baetidae, Libellulidae), Trichoptera and Hymenoptera (Formicidae). The Food Index of Geistdoerfer indicates, that the diet of this Fish species is composed of two main preferential preys: Copepods and Cladocerans. Furthermore, Chironomidae are frequent secondary preys and the others items are secondary order complementary preys. At least, the results of the principal component analysis of items occurrences show, that the prey frequency is function of P. leonensis catchment area or sub-area in Taabo Lake, and evolve inversely, according to climatic seasons. © 2019 International Formulae Group. All rights reserved Keywords: P. leonensis, feeding behavior, catch area, Taabo Lake, Côte d’Ivoire

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Régime alimentaire de Scomberomorus tritor (Cuvier, 1831) dans le Golfe de Guinée

Cited by 6 publications

References 4 publications

Diet of Caranx crysos (Mitchill, 1815) catch by purse seiner in Atlantic Ocean.

Diet of Caranx crysos (Mitchill, 1815) catch by purse seiner in Atlantic Ocean.

Food and feeding habits of <i>Hemichromis fasciatus</i> Peters, 1857 and <i>Heterotis niloticus</i> (Cuvier, 1829) in lake Ehuikro (Côte d’Ivoire)

Food and feeding behavior of <i>Pellonula leonensis</i> (Boulenger, 1916) in Taabo Lake catchment areas (Bandama; Cote d’Ivoire)

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