Trophic ecology and ecomorphology of fish assemblages in coastal lakes of Benin, West Africa

Adité, Alphonse; Winemiller, Kirk O.

doi:10.1080/11956860.1997.11682371

Cited by 60 publications

(67 citation statements)

References 43 publications

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“…Plusieurs travaux ont cependant montré qu'il existe une relation directe entre la morphologie du tube digestif et l'écologie alimentaire de certains poissons (Norton, 1995;Winemiller et al, 1995;Adite & Winemiller, 1997;Bouton et al, 1998;Hugueny & Pouilly, 1999;Delariva & Agostinho, 2001). …”

Section: Introductionunclassified

Régime alimentaire de <i>Pomadasys jubelini</i> (Pisces, Haemulidae) dans une lagune Ouest africaine (lagune Ebrié, Côte d\'Ivoire)

Koné¹,

Kouamelon²,

Ouatrara³

et al. 2008

Sci & Nature

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RésuméLa description de la morphologie du tube digestif des poissons a permis de mettre en évidence chez Pomadasys jubelini (Cuvier, 1830) un estomac développé et un intestin relativement court. Le coefficient intestinal, relativement bas (0,70 < CI < 1,43 pour des poissons dont la longueur standard est comprise entre 75 et 225 mm), a permis de rapprocher cette espèce de la catégorie des poissons omnivores. L'analyse des contenus stomacaux de 318 spécimens de P. jubelini capturés a confirmé le régime omnivore de cette espèce dans la lagune Ebrié ; les poissons se nourrissant de larves de Chironomidae, de restes d'insectes, de crevettes, de restes de crabes, de mollusques et de poissons. La classification des proies par l'utilisation de l'indice d'importance relative (IRI) indique que les mollusques (52,58 %), les larves de Chironomidae (19,01 %) et de crevettes (14,62 %) constituent les proies préférentielles de P. jubelini dans la lagune Ebrié. La comparaison entre spécimens de tailles différentes (75 LS < 130 mm et LS > 210 mm) n'a pas montré de variation du régime alimentaire. Aucune différence du régime alimentaire n'a non plus été constatée entre les poissons capturés durant la saison sèche et ceux capturés durant la saison pluvieuse. Mots

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Section: Introductionunclassified

Régime alimentaire de <i>Pomadasys jubelini</i> (Pisces, Haemulidae) dans une lagune Ouest africaine (lagune Ebrié, Côte d\'Ivoire)

Koné¹,

Kouamelon²,

Ouatrara³

et al. 2008

Sci & Nature

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show abstract

“…The organization of communities can be understood via the interaction of organisms and how species acquire and share resources with each other (Adite & Winemiller, 1997). Fish are an excellent biological model to study this subject due to the great variety of morphological adaptations in their structures (e.g., shape of the mouth and fins), the type of the prey capture (e.g., foraging strategies) and feeding habits (Helfman et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Ecomorphology and resource use by dominant species of tropical estuarine juvenile fishes

et al. 2015

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Eleven ecomorphological attributes and diet of seventeen juvenile fish species were examined to test the hypothesis that morphological patterns determine resource uses in estuarine habitats. Species were separated according to the apparatus to food capture and habitat use (benthic or pelagic) in three different groups: (1) a group with depressed fish body, strong caudal peduncle and enlarged pectoral fins; (2) a second group laterally flattened with a wide protruding mouth, and (3) a third group strongly flattened with small pectorals fins. The following six trophic groups were organized based on prey categories: Zooplanktivores, Benthivores, Omnivores, Detritivores, Macrocarnivores and Insectivores. Significant results (PERMANOVA) between ecomorphological indices and habitat and between ecomorphological indices and trophic groups were found. These data indicate that similarity of ecomorphological forms, which minimize the influence of environment and partitioning of food, would help facilitate the co-existence of these fish when they are abundant in this tropical estuary.Onze atributos ecomorfológicos e a dieta de dezessete espécies de peixes juvenis foram examinados para testar a hipótese de que os padrões morfológicos determinam a utilização dos recursos em habitats estuarinos. As espécies foram separadas de acordo com o modo de captura do alimento e uso do habitat (bentônicos ou pelágicos) em três grupos distintos: (1) um grupo de peixes depressiformes, com forte pedúnculo caudal e nadadeiras peitorais alargadas; (2) um segundo grupo, compressiforme, com ampla boca protrusível, e (3) um terceiro grupo, fortemente achatado e com pequenas nadadeiras peitorais. Seis grupos tróficos foram organizados com base nas categorias de presas: Zooplanctívoros, Bentívoros, Omnívoros, Detritívoros, Macrocarnívoros e Insetívoros. Foram encontrados resultados significativos (PERMANOVA) entre os índices ecomorfológicos e o habitat e entre os índices ecomorfológicos e os grupos tróficos. Estes dados indicam que a similaridade ecomorfológica, que reflete o ambiente e o tipo de alimento consumido, facilitaria a coexistência desses peixes quando estes são abundantes neste estuário tropical.

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“…In correlation with its short gut, Dankwa et al (2005) found that L. dumerili fed preferentially on zooplankton, polychaetes and diatoms, even if it may include in its diet a wide proportion of coarser sand particles rich in animal material. In another West African estuary (Benin), L. dumerili has been described as an omnivorous species by Adite and Winemiller (1997), from a study based on gut content analysis. More recently, stable isotope analysis run with samples collected in the BPA, revealed that L. dumerilli appears to be a benthic feeder (Faye et al, 2011).…”

Section: Morpho-functional Groups Compositionmentioning

confidence: 99%

“…Morphometric distances were transformed into ratios to reduce allometric biases, allowing their functional interpretations (Adite & Winemiller, 1997). Thus, six functional traits relevant to feeding function and six other ones reflecting the locomotion function were defined ( Table 1).…”

Section: Fish Functional Groupingmentioning

confidence: 99%

Assessment of the Recovering Effects of Protected Areas Using a Multiple Functional Approaches: The Bamboung Model (Senegal, West Africa)

Faye¹

2015

IJB

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The Bamboung protected area (Senegal, West Africa) has been implemented in 2003. However, little is known about its recovering effects on fish assemblage functional diversity. To address this issue, a morphology-based functional grouping was adopted, and results were compared to prior classifications. Functional richness relative to each guild and species abundance was used to define a functional redundancy index. Morphometric measurements were done in the field on freshly killed specimens and completed by digital image processing using the Image-J software in laboratory. Data relative to biomass and abundance were obtained from the IRD (Research Institute for Development) / Adaptive Response of Fish Assemblages to the Environmental Pressure (RAP) Unit-Research database. Hierarchical clustering, analysis using the ward method, was applied to the matrix of morphological traits to discriminate fish assemblages into four functional guilds: zoobenthos feeders, algivorous / detritivorous fish, benthopelagic fish, and demersal and ichthyophagous fish. The new functional grouping reduced fish assemblage complexity to smaller and more significant units than those obtained from previous gut-content based-classification, and the modifications affecting fish biomass distribution after fishing ban, marked by large predatory fishes domination appeared more perceptible. Classification based on fish life-history traits showed similar results with a domination of fish assemblages by marine species of larger size and upper trophic level. However, this latter approach is still relevant as it provides significant information on fish species mobility and community dynamics. Major observed changes occurred after one to three years of protection. The total fish biomass varied from 6458 kg.km -2 in 2003 to 3114 kg.km -2 in 2007. We hypothesized that collapse in total fish biomass may be explained by predation pressure in the system. Species richness varied from 51 in 2003 to 72 in 2007, while the functional redundancy index showed a decreasing trend indicating a functional diversification in the system subsequent to the reserve establishment. The present study highlights the relevance of multiple approaches model in addressing dynamics of complex systems. However, the present trend does not presage the future evolution in the system, many reserves take over a decade to get a stable state.

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Trophic ecology and ecomorphology of fish assemblages in coastal lakes of Benin, West Africa

Cited by 60 publications

References 43 publications

Régime alimentaire de <i>Pomadasys jubelini</i> (Pisces, Haemulidae) dans une lagune Ouest africaine (lagune Ebrié, Côte d\'Ivoire)

Régime alimentaire de <i>Pomadasys jubelini</i> (Pisces, Haemulidae) dans une lagune Ouest africaine (lagune Ebrié, Côte d\'Ivoire)

Ecomorphology and resource use by dominant species of tropical estuarine juvenile fishes

Assessment of the Recovering Effects of Protected Areas Using a Multiple Functional Approaches: The Bamboung Model (Senegal, West Africa)

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