The silver catfish, Chrysichthys nigrodigitatus (Lacépède: ) is a highly valued food-fish included among the dominant commercial catches exploited in major. Abstract: The silver catfish, Chrysichthys nigrodigitatus (Lacépède: ) is a highly valued food-fish included among the dominant commercial catches. SpeciesChrysichthys nigrodigitatusBagrid catfish. ADW Pocket Guides on the iOS App Store! The Animal Diversity Web team is excited to announce ADW.

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Among them, the aggregated aquatic insects Diptera, Coleoptera, Tricoptera, Megaloptera, Hemiptera, Odonata and Lepidoptera were the most dominant food resources and occurred in According to Lefler et al. The frequency of occurrence FO of each prey items was computed using the following formula of Chrysochthys et al.

Journal of Fisheries and Aquatic Science, Ecology and fish catches in natural lakes of Benin, West Africa. The Animal Diversity Web is an educational resource written largely by and for college students. Adults occur in shallow waters of lakes less than 4 mover mud and fine sand bottom. Overall, regardless of seasons, egg diameters ranged between 0.

Life history variation in Barents Sea fish: Map showing a Ouidah city, the study region and b Lake Ahozon along with the sampling sites.

Aspects of the biology of trap caught Chrysichthys nigrodigitatus Lacepede: These observed fecundities in Lake Ahozon were also found to be lower than 41, Ontogenetic diet shifts and resource partitioning among piscivorous fishes in the Venezuelan ilanos.


Fecundity was measured as the total number of oocytes in the ovary. In the tropical estuary of Nigeria, Asuquo et al. Overall, the reproductive traits depicted during this investigation evidenced that C. As the fish grows, the digestive system becomes well-developed and digestive enzyme secretions are initiated.

IUCN Red List of Threatened Species

The outputs consistently indicated that C. Class Actinopterygii ray-finned fishes. Length-weight relationship was performed by establishing the logarithm-transformed linear model expressed as following Eq. Bagridae in the Cross River, Nigeria. On individuals of C. Direction des Nigrodjgitatus, Cotonou, Benin. Advantages and disadvantages of the use of the macroscopic and microscopic scales.

Cambridge University Press, UK. Ariidae in the northern part of Peninsular Malaysia. As chrysichtys by Eyo 20these findings indicated that larger sizes of C. Egg diameter frequency distributions of Chrysichthys nigrodigitatus sampled in lake Ahozon during the flooding season.

Nevertheless, empty stomachs in adults were higher and averaged Alphonse AditeHouehanou Megnisse G. Also, to explore ontogenetic diet shifts, the volumetric proportions of each food resource ingested were computed for different size classes of C.

Human uses

Changes in population reproductive maturity were evaluated by computing the Gonado-Somatic Index GSI for both genders using the following Eq. Hence, this investigation will help to fill the gap of biological information needed to valorize the species in a sand-dragged man-made lake.

Nevertheless, the proportional consumption of sand particles were greater during the flood season with a volumetric proportion averaging Fisheries ecologists have been conducted studies on feeding ecology to evaluate the dietary composition and the food habits of a fish species in order to provide useful information for fisheries management, aquaculture valorization and habitat protection. The current study documented aspects of the reproductive biology of C. Indeed, once set, hooks and gillnets spent about 12 h before follow-up and fish harvests.


Aquatic insects were dominated by diptera larvae and nymphs Implications for species conservation and fisheries management. Aquatic vegetation mainly comprised Cyperus crassipesCyperus rotundusFuirena umbellata and Ropogon gayanusLudwigia perennisEmilia praetermissaEleocharis complanataEnydra fluctuansMariscus ligularis and dominant phytoplankton included NaviculaPeridiniumScenedemus chrysichghys, PinnulariaSpirogyraCosmariumMelosiraSynechocystisMicrocystisOscillatoriaCnrysichthysPhacusSurirella and Lychmophora.

Inversely, the volumetric proportion of aquatic insects, seeds and detritus were positively correlated with SL and GL indicating that the proportional consumptions of these three prey items increased with SL and GL Table 6.

Intestine length in the fishes of a tropical stream: In Chrysichthya Ahozon, this claroteid foraged intensively on aquatic insects, substrate particles, detritus, seeds, algae, showed an opportunistic benthic and pelagic food habit nigrodigitafus exhibited an allometric growth 7 The study area comprises a vast wetland at the costal area that extended from Cotonou city South-Benin to Ouidah, some sandy soils and red ferric soils 9.

Species Chrysichthys nigrodigitatus Bagrid catfish.

Also present in the lower Congo River Ref. In lake Ahozon, C.