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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The high percentage However, mean ovary weight tended to increase with body size. In the laboratory, preserved specimens were removed from the ethanol and dissected.

For example, a food item having a volume approximately one quarter of the volume of the 0. 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.

The water of lake Ahozon was occasionally utilized for subsistence agriculture. Likewise, egg diameters significantly varied with seasons flood, dry and wet. Diet similarities and ontogenetic diet shifts: The outputs consistently indicated that C.

In Lake Ahozon, the highest proportions of mature females reached Population structure and reproductive parameters of the cassava croaker, Pseudotolithus senegalensis pisces, valenciennes, in nearshore waters of benin West Africa and their implications for management.

Despite its abundance and prominence in the sand-dragged artificial Lake Ahozon, nothing is known about the reproductive ecology and life history patterns of C. Knowledge on trophic ecology is of great interest for habitat protection, species conservation and establishment, fisheries management and overall ecosystem valorization 10 In the artificial lake of Ahozon, C. Inversely, lake Ahozon is a young and isolated artificial water body established about 11 years ago and hence, exhibiting relatively low food resources, except aquatic insects which may have been more available due to its high rate of colonization that has been especially enhanced by the presence of marginal aquatic vegetation.


Also, for flood, dry and wet seasons, a ripe ovary was randomly selected and frequency histograms of egg diameters were constructed to examine egg maturation and cohort production trends To identify algae, a few drops of water containing fine prey items from stomach contents were examined under a photonic microscope 10 Native range All suitable habitat. African Fishes and Poeple of Water.

Chrysichthys nigrodigitatus, Bagrid catfish : fisheries, aquaculture, gamefish

Lake Ahozon throughtout the country could serve as alternative medium-environments and could be valorized for the developpement of C. All subsamples from hooks, gill nets, seining and cast nets were put together by habitat and season to assess the relative abundance of C. In contrast, the highest fecundities recorded for C. The species showed a moderate fecundity ranging between and 26, eggs in Lake Ahozon, but reached 41, The Freshwater Fish of Tropical Africa. These morphological features indicated that C.

This study discovered the spawning characteristics of Chrysichthys nigrodigitatus from a non-conventional medium-environment, a sand-dragged man-made lake, which can be beneficial for aquaculturist, fishermen Fisheries Department and Environmental Protection Agencies. These trends may be attributed to the high availability of these food resources in the water body regardless of seasons so that C.

Ontogenetic Variation in the Diet of Chrysichthys nigrodigitatus Lacepede, in a tropical estuarine ecosystem in Nigeria. Synonimies are Pimelodus nigrodigitausArius acutivelusChrysichthys furcatusChrysichthys buettikoferi and Chrysichthys cameronensis 5.

Fecundity was measured as the total number of oocytes in the ovary.

Revue d’Hydrobiologie Tropicale, The length-weight relationship and condition factor of Nile Tilapia Oreochromis niloticus L. We are grateful to the numerous reviewers for their thorough peer-review of this manuscript. Nevertheless, like lake Ahozon population, detritus were consistently found in the diet of these three lakes Lagoon of lagos, Cross River Estuary, Epe Lagoon from Nigeria.


Search in Google Scholar. In this alternative medium-environment, C. The need for its conservation. Ecology and fish biodiversity of man-made lakes of southern benin West Africa: Life history variation in Barents Sea fish: Sexes were differentiated by observing anal and genital openings, the form of the head and gonads.

Superclass Gnathostomata jawed vertebrates. Food composition and feeding habits of little tunny Euthynnus alletteratus. Prey ingested and niche breadth: Add your observation in Fish Watcher Native range All suitable habitat This map was computer-generated and has not yet been reviewed.

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Also, depths ranged between How to cite this article: Indeed, during the flood season, detritus could be less available to fishes because flushed by water currents that caused unstable lake bottom and high disturbances. These results indicated that, in this special habitat, aquatic insects were the major food items consumed by niggodigitatus introduced catfish species. The current study well-documented the feeding ecology of C. The identified food items were then separated and blotted on a paper towel to remove excess moisture.

Consequently, digestion and feces evacuation continue to increase the number of empty stomachs.

The frequency of occurrence FO of each prey items was computed using the following formula of Chrysichthyx et al. Population structure and reproduction of the African bonytongue Heterotis niloticus in the So River-floodplain system West Africa: