Régime alimentaire de &lt;i&gt;Engraulis encrasicolus&lt;/i&gt; (Linneaus, 1758) du littoral de la Côte d’Ivoire

Ouattara, Siaka; Ouattara, Nahoua Issa; Soro, Doudjo; Fantodji, Agathe

doi:10.4314/ijbcs.v8i3.8

Cited by 4 publications

(9 citation statements)

References 5 publications

(2 reference statements)

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“…In our study, the sex ratio is in favour of males in the small sizes and of females in the larger sizes. This agrees with the results obtained by [42]. The change in the sex ratio during the fish cycle may be due to differential migration or differential natural mortality by sex [43 -45].…”

Section: Discussionsupporting

confidence: 90%

“…Other results obtained by [41] in the extreme west of Algeria, show a dominance of males (58.36 %). Similarly, in the coast east of Ivory Coast, the results obtained show a dominance of males (1:1.2) on the overall sample [42]. In our study, the sex ratio is in favour of males in the small sizes and of females in the larger sizes.…”

Section: Discussionsupporting

confidence: 70%

“…According to the same author, the western coastline has the most favourable environmental conditions for breeding. On the east coastline of Ivory Coast, [42] found that E. encrasicolus essentially reproduced in the rainy season. The evolution of I G associated with monthly changes in different stages of sexual maturity indicates that reproduction starts in April and continues beyond September.…”

Section: Discussionmentioning

confidence: 96%

“…In some countries of North Africa, including Senegal, Mauritania and Morocco, reproduction of E. encrasicolus is spread throughout the year [47]. This result is different to those obtained by [42] on the coast east of the Ivory Coast, where the only breeding period extended from January to May. [46][47][48] on the Ivory Coast indicates two periods of reproduction.…”

Section: Discussionmentioning

confidence: 99%

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Study of reproduction of anchovy Engraulis encrasicolus (Actinopterygii, Engraulidae) in the central area of the Moroccan Atlantic coast

Baali¹,

Bourassi²,

Falah³

et al. 2017

JMES

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Morocco is one of the four regions in the world known for the richness of its fish resources in its coasts (through upwelling). The upwelling phenomenon is the origin of high biological productivity of the regions which results in a strong richness of the pelagic resources (sardines, anchovies, mackerel, etc.). These species were defined as fish living in the sea between the surface and 200 meters deep and characterized by significant horizontal and vertical migration in coastal waters [1]. They make up the largest share of global marine catch and they represent quantitatively the main exploited resources, and account for almost 80 % of catches [2,3]. The socioeconomic importance of sea fishing requires managers to strengthen the biological studies necessary for the evaluation of these resources in order to allow fishermen to make the most of natural stands on one hand, and to safeguard stocks by appropriate regulatory measures on the other hand. The anchovies Engraulis encrasicolus Linnaeus, 1758 are an essential element of food chain [4]. Little is known about the biology of this species in the Atlantic waters of Morocco. It is generally admitted the existence of one unique stock for North West Africa, which extends from Morocco to Sierra Leona. Nowadays, the occurrence of different modal classes detected in acoustic surveys carried out in Moroccan and Mauritanian waters raises out the possibility of the existence of different stocks [5]. Most of the research on the ecology of this species was performed in the northern Mediterranean Sea [6][7][8][9], the Black Sea and the Azov Sea [10][11][12], the Adriatic Sea [13,14] or the Bay of Biscay [15][16][17][18]. Despite the significant economic importance of this species along the North African Atlantic coast, little information is known either on its ecology or biology. Populations of small pelagic fish, such as sardine and anchovy, show evidence of important natural fluctuations in their abundance [19,20]. These fluctuations seem to be related, among other factors, to climate variability [21] or habitat conditions [9]. Growth and reproduction are two important parameters in fish population dynamics. Therefore, the present paper is focused on the study of E. encrasicolus reproduction and growth; particularly sex-ratio, gonado-somatic index, condition factor and the size at first maturity were studied. Maarif, B.P. 5366, Casablanca, Morocco. 3 National Fisheries Research Institute, Sidi Abderrahmane Road, Equestrian Club Ould Jmel, B.P. 20050, Casablanca, Morocco Abstract A study on the sexual cycle, of the European anchovy, the pelagic fish, Engraulis encrasicolus (Clupeiformes, Engraulidae), was carried out in the Central Atlantic Moroccan coast in the period between January 2013 and December 2013. This work represents the first attempt to investigate the reproductive features of the E. encrasicolus population in this area. The sex ratio for all fish (1:1.32) was in favour of females. The macroscopic examination of the gonads showed that this specie is matu...

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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 70%

Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

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Study of reproduction of anchovy Engraulis encrasicolus (Actinopterygii, Engraulidae) in the central area of the Moroccan Atlantic coast

Baali¹,

Bourassi²,

Falah³

et al. 2017

JMES

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“…This variation in diet could be explained by the fact that these individuals make choices for prey that can provide the maximum energy for the performance of migration, growth and reproduction functions. Indeed, Sánchez 21 and Ouattara et al 22 have pointed out that fish dietary preference is influenced by several factors such as accessibility, abundance and energy content in the feed, that their opportunistic nature to consume only preferentially the most abundant prey in the environment. Moreover, the laying period of C. crysos would have been March, August and November.…”

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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Diet and Food Consumption of the African Catfish, <i>Chrysichthys nigrodigitatus</i> Lacépède (1803) (Siluriformes: Claroteidae), from the Hydrosystem Lake Togo-Lagoon of Aného (South of Togo)

Ouro-Sama¹,

Afiademanyo²,

Solitoke³

et al. 2020

JEP

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Régime alimentaire de <i>Engraulis encrasicolus</i> (Linneaus, 1758) du littoral de la Côte d’Ivoire

Cited by 4 publications

References 5 publications

Study of reproduction of anchovy Engraulis encrasicolus (Actinopterygii, Engraulidae) in the central area of the Moroccan Atlantic coast

Study of reproduction of anchovy Engraulis encrasicolus (Actinopterygii, Engraulidae) in the central area of the Moroccan Atlantic coast

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

Diet and Food Consumption of the African Catfish, <i>Chrysichthys nigrodigitatus</i> Lacépède (1803) (Siluriformes: Claroteidae), from the Hydrosystem Lake Togo-Lagoon of Aného (South of Togo)

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Régime alimentaire de <i>Engraulis encrasicolus</i> (Linneaus, 1758) du littoral de la Côte d’Ivoire

Cited by 4 publications

References 5 publications

Study of reproduction of anchovy Engraulis encrasicolus (Actinopterygii, Engraulidae) in the central area of the Moroccan Atlantic coast

Study of reproduction of anchovy Engraulis encrasicolus (Actinopterygii, Engraulidae) in the central area of the Moroccan Atlantic coast

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

Diet and Food Consumption of the African Catfish, &lt;i&gt;Chrysichthys nigrodigitatus&lt;/i&gt; Lac&#233;p&#232;de (1803) (Siluriformes: Claroteidae), from the Hydrosystem Lake Togo-Lagoon of An&#233;ho (South of Togo)

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Diet and Food Consumption of the African Catfish, <i>Chrysichthys nigrodigitatus</i> Lacépède (1803) (Siluriformes: Claroteidae), from the Hydrosystem Lake Togo-Lagoon of Aného (South of Togo)