Food and Feeding Habits of &lt;i&gt;Syndontis ocellifer&lt;/i&gt; (Boulenger, 1900) From River Adofi, Southern Nigeria

Meye, JA; Omoruwou, P.E.; Mayor, ED

doi:10.4314/tfb.v17i1.20913

Cited by 5 publications

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“…This trend has been also evidenced for Synodontis schall (Lock, 1982;Idodo-Umeh, 2005) and S. membranaceus (Owolabi, 2008). On the other hand, Meye et al (2008) reported that S. ocellifer fed mostly at night.…”

Section: Discussionmentioning

confidence: 53%

Preliminary data on the feeding habits of the endemic speciesSynodontis koensisPellegrin, 1933 (Siluriformes, Mochokidae) in a West African River (Sassandra River Basin, Côte d’Ivoire)

Yao

Kouamé

Ouattara

et al. 2010

Knowl. Managt. Aquatic Ecosyst.

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Key-words:Synodontis koensis, endemic species, feeding habit, Sassandra River, Côte d'Ivoire In the implementation of programs for protection and management of ichthyofauna, endemic species should have high priority in the conservation measures. Their fishery should be based on intimate knowledge of their ecology and biology. Feeding habits of the endemic Mochokid Synodontis koensis were assessed in the Sassandra River (Côte d'Ivoire) in relation to the study zone, the specimen sex and size, and the season. Of the 303 stomachs examined, 49 were empty (16%). The fluctuation of the vacuity index indicated that S. koensis feeds more at night. The diet consisted mainly of plant detritus and chironomid larvae. The statistical analysis of the feeding according to the study zones, the sex of fish and the seasons does not show any significant difference between regimes, whereas significant ontogenic shifts in diet were observed. Dans la mise en oeuvre de programmes pour la protection et la gestion de l'ichtyofaune, les espèces endémiques doivent faire l'objet d'une attention particulière. Leur exploitation doit se faire sur la base d'une bonne connaissance de leurs éco-logie et biologie. Les habitudes alimentaires de Synodontis koensis, espèce endémique du fleuve Sassandra (Côte d'Ivoire), ont été étudiées pour la première fois en fonction de la zone d'étude, du sexe et de la taille des spécimens et de la saison. Sur 303 estomacs examinés, 49 étaient vides (16 %). La variation de l'indice de vacuité indique que S. koensis se nourrit surtout la nuit. Elle consomme principalement des débris végétaux et des larves de Chironomidae. Le régime alimentaire ne présente de variation statistiquement significative ni en fonction de la zone d'étude, du sexe et ni des saisons. À l'inverse, il est fonction de la taille des individus. RÉSUMÉ

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Section: Discussionmentioning

confidence: 53%

Preliminary data on the feeding habits of the endemic speciesSynodontis koensisPellegrin, 1933 (Siluriformes, Mochokidae) in a West African River (Sassandra River Basin, Côte d’Ivoire)

Yao

Kouamé

Ouattara

et al. 2010

Knowl. Managt. Aquatic Ecosyst.

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“…Similarly, it was considered important to retain sand in the analysis. Although sand is not a food item, its presence may be an indicator of dietary similarity, as sand is often ingested by fishes feeding on benthic organisms (Meye et al , 2008) and its presence may affect stomach fullness, which in turn may influence feeding behaviour (Lazzaro, 1987).…”

Section: Discussionmentioning

confidence: 99%

Diet and feeding niches of juvenile Gadus morhua, Melanogrammus aeglefinus and Merlangius merlangus during the settlement transition in the northern North Sea

Demain

Gallego

Jaworski

et al. 2011

Journal of Fish Biology

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A study on the feeding ecology of juvenile cod Gadus morhua, haddock Melanogrammus aeglefinus and whiting Merlangius merlangus during the pelagic to demersal transition was carried out on fishes sampled throughout their settlement season at a local nursery ground in the north-western North Sea, off the Scottish east coast. A comprehensive quantitative taxonomic analysis of the diets, as described in the paper, showed the emergence of distinctive feeding niches, minimizing the potential for competition between species and size categories. The diet of the juveniles changed with fish size, water depth, time of year and distance offshore. Small G. morhua were present in the study area earlier in the season, settled further inshore and ate a higher proportion of pelagic prey (copepods) and as size increased they moved into deeper waters and targeted larger, more benthic prey. As M. aeglefinus grew larger and moved into deeper waters, a diet of largely copepods, amphipods, pelagic Ammodytes spp., cyprids and pelagic gastropods evolved to one dominated predominantly by fishes and benthic invertebrates. In the case of M. merlangus, widespread ages and sizes throughout the sampling season, a consequence of their more protracted spawning season, resulted in dietary changes which were more likely to be influenced by seasonal changes in the prey field, in addition to developmental (size) changes, than the diets of the other two species.

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“…Fish scales would have been found accidentally in the food bowl of Synodontis bastiani. One could say that the piscivorous behavior of this species is to be rejected since scales are the only fish parts found in the stomach contents as had also rejected at Synodontis schall in Niger River [26]. Furthermore, the sedimentary fraction (sand grains, pebbles and mud), observed in the stomachs testifies to the consumption of benthic foods by species of the genus Synodontis.…”

Section: Discussionmentioning

confidence: 99%

Feeding Habits of Synodontis Species Found in Downstream of Taabo Dam of Bandama River in Côte d'Ivoire

N’Da

Koné²,

Kien³

et al. 2023

JSRR

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The building of hydroelectric dams has consequences on the ecological conditions of ecosystems, such as the regression or disappearance of certain species that have a benthic entomophagous diet or a proliferation of omnivorous and planktivorous species. The study of fish feeding can provide data not only on the presence of prey, but also on the abundance and availability of trophic potential. In view of the new hydroelectric development project on the Bandama River, this study proposes to examine the diets of Synodontis bastiani, S. schall and S. punctifer that are captured in the area. Stomachs were collected and contents examined from fish caught monthly between November 2019 and October 2020 using gill nets in the N'Dènou locality. A total of 417 fish belonging to S. bastiani, S. schall, S. punctifer were examined. The food spectrum of the studied species is wide and diversified. It is mainly composed of Macrophytes, Insects, Worms, Mollusks, Zooplankton, Crustaceans. These species are all omnivorous with a benthophagous tendency. No difference was observed in the diet according to the size.

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Food and Feeding Habits of <i>Syndontis ocellifer</i> (Boulenger, 1900) From River Adofi, Southern Nigeria

Cited by 5 publications

References 0 publications

Preliminary data on the feeding habits of the endemic speciesSynodontis koensisPellegrin, 1933 (Siluriformes, Mochokidae) in a West African River (Sassandra River Basin, Côte d’Ivoire)

Preliminary data on the feeding habits of the endemic speciesSynodontis koensisPellegrin, 1933 (Siluriformes, Mochokidae) in a West African River (Sassandra River Basin, Côte d’Ivoire)

Diet and feeding niches of juvenile Gadus morhua, Melanogrammus aeglefinus and Merlangius merlangus during the settlement transition in the northern North Sea

Feeding Habits of Synodontis Species Found in Downstream of Taabo Dam of Bandama River in Côte d'Ivoire

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