References of "Vreven, Emmanuel"
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See detailAn updated checklist of the ichthyofauna of the Mono River basin (Benin and Togo: West Africa).
Lédéroun, Djiman; Snoeks, Jos; Lalèyè, Philippe et al

in Ichthyological Exploration of Freshwaters (2018), 28(2), 135-156

In order to evaluate the impact of anthropogenic changes, such as the future construction of a dam at Adjarala, on the fish diversity of the Mono rRver basin, a list of the ichthyofauna of this basin has ... [more ▼]

In order to evaluate the impact of anthropogenic changes, such as the future construction of a dam at Adjarala, on the fish diversity of the Mono rRver basin, a list of the ichthyofauna of this basin has been compiled. A total of 60 native and one introduced species, belonging to 40 gebera and 23 families are rapported. The families Cyprinidae and Cichlidae are the best represented. Of the 60 native species recorded, three are typically marine, while five others are estuarine. The present study shows that the species diversity of the lower Mono is most probably underestimated. [less ▲]

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See detailDon't judge a fish by its fins: species delineation of Congolese Labeo (Cyprinidae)
Van Steenberge, Maarten; Gajdzik, Laura ULiege; Chilala, Alex et al

in Zoologica Scripta (2016)

Conspicuous characters are often useful in species identification. Yet, identification and delineation are two different processes, and such characters do not necessarily provide the best basis on which ... [more ▼]

Conspicuous characters are often useful in species identification. Yet, identification and delineation are two different processes, and such characters do not necessarily provide the best basis on which species can be delineated. This is illustrated by the case of the Labeo with papillary lips from the Congo basin. Traditionally, species delineation in this group was based on a conspicuous trait: the shape of the dorsal fin, which shows a profound degree of differentiation. Morphometric analyses were performed on 185 specimens both with and without measurements taken on this fin. The groups obtained using these two approaches were compared with those obtained through DNA barcoding. For this, 24 sequences of the standard barcoding COI gene were obtained. Species delineations based on morphological and molecular results were in agreement when the shape of the dorsal fin was ignored. This suggested that of the five nominal species known from the Congo basin, L. altivelis, L. rosae, L. lineatus, L. weeksii and L. maleboensis, only the former three remain valid. Consequently, L. weeksii was synonymised with L. altivelis and L. maleboensis with L. lineatus. The sole Congo basin endemic is L. lineatus as L. altivelis and L. rosae also occur in more southern basins. The use of the shape of the dorsal fin in morphological studies has previously led to overestimates of species diversity in this group. This is due to the fact that L. altivelis shows a remarkable amount of geographical variation for this trait. The large amount of intra- and interspecific variation in this character was caused by differential allometric growth in different parts of the dorsal fin. [less ▲]

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See detailLabeo rosae (Cypriniformes: Cyprinidae) in the Congo basin: a relict distribution or a historical introduction?
Van Steenberge, Maarten; Gajdzik, Laura ULiege; Chilala, Alex et al

in Journal of Fish Biology (2014)

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See detailA re-evaluation of species diversity within the Labeo (Cypriniformes: Cyprinidae) with papillary lips from the Congo basin
Gajdzik, Laura ULiege; Van Steenberge, Maarten; Chilala, Alex et al

Poster (2013, September)

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See detailActual status of the ichthyofauna of the Mono river basin (Togo and Benin)
Lederound, Djiman; Vreven, Emmanuel; Lalèyé, Philippe et al

Conference (2012)

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See detailContribution à la connaissance de l’ichtyofaune de l’Inkisi au Bas-Congo (RD du Congo)
Wamuini Lunkayilakio, Soleil; Vreven, Emmanuel; Vandewalle, Pierre ULiege et al

in Cybium (2010), 34(1), 83-91

L’étude de la composition et de la distribution de la faune ichtyologique de la partie congolaise de la rivière Inkisi a permis d’inventorier 61 espèces réparties en 37 genres appartenant à 15 familles ... [more ▼]

L’étude de la composition et de la distribution de la faune ichtyologique de la partie congolaise de la rivière Inkisi a permis d’inventorier 61 espèces réparties en 37 genres appartenant à 15 familles. Les Cyprinidae sont les mieux représentés avec 15 espèces. Les Mormyridae, Cichlidae et Clariidae viennent ensuite avec respectivement 11, 9 et 7 espèces. La composition spécifique des communautés des poissons est différente, du cours supérieur vers l’aval. Le profil longitudinal de cette partie de l’Inkisi est caractérisé par la présence de trois chutes qui sont, de l’aval vers l’amont : la chute de Mantumpu (8 m de hauteur) à l’entrée de l’Inkisi dans le fleuve Congo, la chute de Zongo (58 m) à 6 km du confluent et la chute de Sanga (24 m) à 10 km de la chute de Zongo. La présence de ces chutes sur le cours de la rivière semble avoir influencé l’ichtyofaune et pourrait même être à l’origine du nombre important d’espèces endémiques en amont. Si l’on s’en tient au cours principal, la différence entre la richesse spécifique en amont et celle en aval n’est pas significative, probablement à cause de la morphologie du bassin. La richesse et la composition spécifique de la partie comprise entre les deux chutes (Zongo et Sanga) ne diffèrent pas de celles de l’amont de la chute de Sanga. Toutefois, cette composition est fort différente de celle de la zone tout en aval. [less ▲]

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