Reproductive strategy of chrysichthys nigrodigitatus. Production of catfish, chrysichthys nigrodigitatus, in. Water quality parameters were characterized following apha standard. Estimation of population parameters of two commercially important claroteids chrysichthys auratus and c. Chrysichthys nigrodigitatus lacepede, 1802, also known as silver catfish, occurs in africa, including nigeria. A case study of new calabar river basin theodore athanasius allison department of anatomy, faculty of basic medical science, college of health sciences, university of port harcourt, nigeria. Effects of boiling and smoking on the proximate composition. Two pairs of otoliths, the saccular and sagittae are shown to be well developed in the catfish,chrysichthys nigrodigitatus. Studies on aspects of the ecology of the catfish chrysichthys. Chemical composition and antibacterial activity of oils from chrysicthys nigrodigitatus and hepsetus odoe, two freshwater fishes from yabassi, cameroon. Genetic diversity in the mtdna control region and population. Mar 12, 2018 chrysichthys nigrodigitatus and hepsetus odoe are widespread in the tropical regions. The following is the supplementary data to this article.
Lengthweight relationship and condition factor of silver. Endoparasitic fauna of chrysichthys nigrodigitatus. Chrysichthys nigrodigitatus, and one hundred and nineteen chrysichthys auratus longifilis were analysed. However, very few studies have been done in cameroon from this species. Chrysichthys nigrodigitatus lacepede1802, is an omnivorous because of its good growth rate, c. Chrysichthys nigrodigitatus and hepsetus odoe are two fishes well known in cameroon. Chrysichthys nigrodigitatus silver catfish, a member of the family claroteidae and locally known as obokun possesses a pointed snout slightly longer than or equal to the with of the mouth. The food and feeding habits of the catfishes, chrysichthys. Fecundity, gonadosomatic index and spawning period of. The study assessed quantitatively the threat status of silver catfish, chrysichthys nigrodigitatus lacepede. Chrysichthys nigrodigitatus individuals were then dissected and the digestive tract was removed and its length was measured as the distance from the distal end to the anus aspects of the population biology of chrysichthys nigrodigitatus of the lower cross river, nigeria.
Average of coefficient of variation of morphometric was lower cv chrysichthys. See below for the abstract, table of contents, list of figures, list of tables, list of appendices, list of abbreviations and chapter one. Return to article details condition factor, food and feeding habit of chrysichthys nigrodigitatus siluriformes. Chrysichthys nigrodigitatus pdf the silver catfish, chrysichthys nigrodigitatus lacepede. Pdf some aspects of the biology of chrysichthys nigrodigitatus. Research article and condition factor of silver catfish. Pdf chemical composition and antibacterial activity of oils. Pdf the complete mitogenome of bagrid catfish chrysichthys. This freshwater fish is of great commercial value at yabassi and is interesting for consumption after boiling or smoking. A study on the reproductive strategy of chrysichthys nigrodigitatus was conducted from october 2015 to august 2016, in the nkam river in yabassi, littoral region of cameroon.
Chrysichthys nigrodigitatus lacepede, 1803 frais lmfe clarotes laticeps ruppell, 1829 alcool mrac 73p980 liauchenoglanis thomasi boulenger, 1916 alcool mrac 73010p3540. Silver catfish chrysichthys nigrodigitatus lacepede, 1803, an endangered fish species in cross river, cross river state, nigeria ayotunde e. In chrysichthys nigrodigitatus however, the orders of accumulation were gills 51. The length and weight of the total catch of the fish chrysichthys nigrodigitatus was taken and recorded to the nearest centimetre and weight in grams. Pollution in chrysichthys nigrodigitatus from two polluted lagoons bassey o.
The genetic diversity and population structure of chrysichthys nigrodigitatus were evaluated using a 443 base pair fragment of the mitochondrial control region. Influence of salinity on survival of fingerlings of the. African forktail catfish afrikanischer gabelschwanzwels. Food, feeding habit and condition factor of silver catfish chrysichthys nigrodigitatus geoffrey saint hilaire, 1808 from cross river estuary. It is also used in the control of a broad spectrum of phytophagous and soilinhabiting insects, public health pests, and animal. Some aspects of ecology of chrysichthys nigrodigitatus lacepede. Bagridae in the cross river, nigeria download download pdf. Endoparasitaemia of chrysichthys nigrodigitatus in a tidal. There are currently 42 recognized species in this genus. Helminth bioload of chrysichthys nigrodigitatus lacepede 1802 from lekki lagoon lagos, nigeria. Chemical composition and antibacterial activity of oils from. Claroteidae and its establishment in the artificial lake of ahozon.
Oils of fish origin are a very rich source of omega. Pdf aspects of the biology of silver catfish chrysichthys. It is highly commercial, marketed fresh, smoked or dried, and apart from being a cheap source of highly nutritive protein, it also contains other essential nutrients required by the body 9. Chrysichthys walkeri fed mostly on insects, chrysichthys filamentosus on crustaceans and chrysichthys nigrodigitatus on molluscs. In addition, ten samples of fish, chrysichthys nigrodigitatus were obtained. View of condition factor, food and feeding habit of. Data obtained included food conversion values, condition factor, lengthweight relationships, survival and growth. Significant differences p pdf 461 kb abstract sex ratio and fecundity variations of chrysichthys nigrodigitatus and chrysichthys walkeri from asejire lake nigeria were examined. Chrysichthys is a genus of claroteid catfishes native to africa. Aspects of the biology of trap caught chrysichthys nigrodigitatus.
Ekanem between may and october 1990, fecundity, egg size and condition factor of chrysichthys nigrodigitatus lacepede in the cross river, nigeria, were studied. Different rearing facilities concrete tanks, pens and ponds were tested for suitability as spawning environments. Mature specimens in reproduction usually have rounded. Samples of chrysichthys nigrodigitatus were collected twice in july 2nd and 4th saturday, twice weekly through the other months tuesdays and saturdays from august to november. Among the eight populations collected comprising 129 individuals, a total of 89 polymorphic sites defined 57 distinct haplotypes. The total length of chrysichthys nigrodigitatus ranged from 12.
Fingerlings of chrysichthys nigrodigitatus were fed four isocaloric diets at different crude protein levels to determine the optimum protein requirement of the species. Chrysichthys nigrodigitatus lacoplde from cross river, nigeria s. A comparative study of catfish, chrysichthys nigrodigitatus lacepede production was made in brackish water ponds near lagos lagoon using groundnut cake as the main supplementary feed. The formolether concentration method was used to examine the samples. Wet and dry weights of the samples and six hourly drip losses were taken on a weekly basis. They belong to the bagridae family and are native to africa. Download this complete zoology project material titled. The fecundity f of this population varied from 3 046 eggs total length, l28.
Arsenic fractionation in sediments and speciation in muscles of fish. It is a highly valuable fish species amongst the indigenous african populations. Influence of salinity on survival of fingerlings of the estuarine catfish chrysi chlhys yiigrsdsgitams chrysichthys nigrodigitatus lacepede 1803 in jebba lake, nigeria here on projects. View of heavy metal profile of water, sediment and freshwater cat.
Fish chrysichthys nigrodigitatus samples were collected using a trap basket slightly above the bottom of the lagoon, where the water was shallow at depth of 3. B1, chukwu l o1, srivastava s2 and reddy j2 1department of marine sciences, ecotoxicology laboratory, faculty of science, university of lagos, nigeria 2proteomics laboratory, faculty of bioscience and bioengineering, indian institute of technology. Chrysichthys nigrodigitatus name synonyms arius acutivelis valenciennes, 1840 chrysichthys acutirostris gunther, 1864 chrysichthys buettikoferi steindachner, 1894 chrysichthys buttikoferi steindachner, 1894 chrysichthys camaronensis gunther, 1899 chrysichthys cameronensis gunther, 1899. B department of fisheries and aquatic science, faculty of agriculture and forestry, cross river university of technology, p.
Ten 10 parasites extracted belonged to the following groups. The morphology of the otoliths of the bagrid catfish, chrysichthys. A mean relative fecundity of 231 eggscm or eggsg of fish was obtained for this population. They have been suggested to provide numerous health benefits for humans involving antimicrobial properties. Dietaries reveal 7 identified food items and an unidentified mass. The fish is common in the niger delta where it is a valued source of protein and constitutes the dominant. On the other hand, the descriptors snl, ptl, dptpl, bdh, dio, dptds, and. Pdf on the anatomy and function of the cephalic structures. Health status of chrysichthys nigrodigitatus in response. Studies on the biology of silver catfish chrysichthys nigrodigitatus lacepede 1803 in jebba lake, nigeria with abstract, chapter 15, references and questionnaire. Endoparasitic fauna of chrysichthys nigrodigitatus lacepede. The estuarine catfish chrysichthys nigrodigitatus is a prized food fish in nigeria especially in the niger delta region. It also possesses pointed fins and acute spines not covered by a thick epidermal tissue.
A study on the food and feeding habit of chrysichthys nigrodigitatus lacepede was conducted in river niger within the region of oshimili local government. Chrysichthys nigrodigitatus journal of fisheries and life sciences. Length weight relationships and condition factors of. View of diet, size and reproductive biology of the silver catfish. Proximate composition and technological properties of wild. The general trend of accumulations in all the organisms were chrysichthys nigrodigitatustilapia zillii macrobrachium macrobrachion. There is a growing concern over the sustainability of the fishery in the face of climate change and environmental variability. Bagridae, of cross river, nigeria download download pdf. Data on some aspects of the ecology of the catfish chrysichthys auratus in the benin river are presented. A total of two hundred 200 specimens were analyzed for gut contents using numerical. Chrysichthys nigrodigitatus lacepede from cross river. Wet and dry weights of the samples and six hourly drip losses were taken on a. A total of 1436 specimens were examined in the study of the food habits of the three chrysichthys species in lekki lagoon. The aspects of the biology of the catfish chrysichthys nigrodigitatus were investigated from august to october 2015 in nwaniba river, akwa ibom state, nigeria.
Three methods frequency of occurrence, gravimetric and numerical were used to study food, feeding habit and condition factor. Chemical composition and antibacterial activity of oils. Production of catfish, chrysichthys nigrodigitatus, in brackish water ponds in nigeria using groundnut cake as supplemental feed. Chrysichthys nigrodigitatus lacepede, 1803, an endangered. Some reproductive aspects of chrysichthys nigrodigitatus. Chrysichthys nigrodigitatus in the crossriver estuary, nigeria.
Claroteidae article pdf available july 2018 with 38 reads how we measure reads. Declining population density of silver catfish, chrysichthys. Oteme and others published polyculture du machoiron chrysichthys nigrodigitatus avec oreochromis niloticus en etang find, read and cite all the research you need on. Chrysichthys nigrodigitatus is a species of fish in the family of claroteidae hopkins et al. Helminth bioload of chrysichthys nigrodigitatus lacepede. Gut parasites of chrysichthys nigrodigitatus lacepede. Unidentified mass was the most abundant food item by occurrence 70. Certain differences were found in their food habits. Bagridae from lower river benue, makurdi, nigeria download download pdf condition factor, food and feeding habit of chrysichthys nigrodigitatus siluriformes. It is suggested the observed diversity in feeding habits might be due to an active. Among the eight populations collected comprising 129 individuals, a total of 89 polymorphic sites defined 57 distinct haplot.
Morphometry and diet of chrysichthys nigrodigitatus lacepede in. Chrysichthys nigrodigitatus, of the family claroteidae plays a pivotal. In conclusion, selectivity in chrysichthys nigrodigitatus gillnet fishery in the cross river estuary may be. Growth pattern, food, feeding habit, sex ratio, epe lagoon, nigeria. Population parameter estimates for chrysichthys auratus and c. Proteomic biomarkers as indicator of aquatic pollution in. This species was also characterized by the lowest values of hl, dsl, adl, anl, dsh, ed1, pth, anh, dplan and dplad table 1. Pdf chemical composition and antibacterial activity of. Population parameter estimates for chrysichthys auratus.
Imeheffects of different processing methods on the proximate composition of chrysichthys nigrodigitatus from great kwa river, nigeria european academic research vol. Chrysichthys nigrodigitatus lacepede 1802 is a common silver coloured african catfish occurring in nigeria and several west african countries. Pdf polyculture du machoiron chrysichthys nigrodigitatus. Lengthweight regressions equations showed significant p 0. Pdf condition factor and diet of chrysichthys nigrodigitatus and. Effects of different processing methods on the proximate. Lengthweight relationship of oreochromis niloticus in mahin lagoon, ondo state, nigeria. The chemical composition and the antibacterial activity of these fishes derived oils are unknown. Studies on the biology of silver catfish chrysichthys. Bagridae from lower river benue, makurdi, nigeria download. Studies were conducted on the fecundity, gonadosomatic index and the spawning period of the species. Stomach fullness analysis of chrysichthys nigrodigitatus from. Catfish chrysichthys nigrodigitatus and mullet liza grandisquamis were sampled from lagos lagoon and agboyi creek and analysed for alphabhc, betabhc, lindane, deltabhc, heptachlor, heptachlorepoxide b, aldrin, dieldrin, endrin, endrin aldehyde, endrin ketone, cischlordane, transchlordane, endosulfan 1, endosulfan 11, endosulfan sulphate, methoxychlor, p,p. Between may and october 1990, fecundity, egg size and condition factor of chrysichthys nigrodigitatus lac.