A feeding trial was conducted with hybrid asianafrican catfish, clarias macrocephalus x c. Clarias gariepinus undertake lateral migrations from the larger water bodies, in which they feed and mature at about the age of 12 months, to temporarily flooded marginal areas in order to breed. Effects of dietary supplementation of date palm phoenix. Clarias macrocephalus x clarias gariepinus scotcat. Replacement of soybean meal with palm kernel meal in. Preliminary results on the morphological characterisation.
Pdf a study was conducted on the rearing of hybrid magur clarias gariepinus x clarias macrocephalus which was introduced by private. Gene expression of acetylcholinesterase in hybrid catfish clarias gariepinus x clarias macrocephalus exposed to chlorpyrifos and carbaryl chawanrat somnuek 1, chuta boonphakdee 2, voravit cheevaporn1 and keiichi tanaka 3 1graduate school of environmental science, faculty of science, burapha university, chonburi 201, thailand. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. Sharptooth catfish clarias gariepinus species profile. Escaped hybrid catfish female thai walking catfish, clarias macrocephalus. Nutritional comparison of captured clarias gariepinus. Distinguished from southeast asian congeners by an extremely short and rounded occipital process and by a very high dorsal fin. Isolation of microsatellites in the bighead catfish, clarias.
The african sharptooth catfish is a large, eellike fish, usually of dark gray or black coloration on the back, fading to a white belly. Genetic impacts of hybrid catfish farming clarias macrocephalus x c. They are produced in thailand in a commercial scale for the food market, as it is a preferred taste. Morphological differentiation among cultured and wild clarias. Clarias batrachus can survive out of water for quite sometime using its auxiliary breathing. Abstract three types of primary cell cultures were established from organs of hybrid catfish clarias gariepinus x clarias macrocephalus namely, caudal trunk, gill and liver. Contrary to other clarias species, clarias gariepinus has a high number of gill rakers varying from 24110 ref. They also occur in asia minor israel, syria and south of turkey. A comparative study on the apparent digestibility of selected. Nutritional researches on hybrid clariid catfish clarias. Suanyuk n1, rogge m, thune r, watthanaphiromsakul m, champhat n, wiangkum w. Pdf morphological differentiation among cultured and wild clarias.
While every effort has been made to provide the most reliable and uptodate information available, ultimate legal requirements with respect to species are contained in. Effects of moringas leave supplementary diet on growth. Stability and bioavailability of vitamin cglucose in clarias. A study of density of hybrid catfish clarias gariepinus x. Supplemental lysine in diets where fish meal is replaced by cassava. Application of cell culture from hybrid catfish clarias gariepinus x clarias macrocephalus in screening toxicity of chemicals pornsawan visoottivisetha, and nantawan chanwannab a biology department, faculty of science, mahidol university, rama vi road, bangkok 10400, thailand. Growth, feed utilization and haematology of clarias. A high tolerance to a wide spectrum of environmental factors and excellent taste of its meat explain why the african sharptooth catfish clarias gariepinus is widely used for creating interspecific hybrids with the broadhead catfish clarias macrocephalus, a species which is characterized by a high growth rate. The present study documents the isolation of eight polymorphic microsatellite markers from the bighead catfish, clarias macrocephalus and crossamplification in two other catfish species. Cultivated on a small scale but attempts to farm it are increasing ref. Gene expression of acetylcholinesterase in hybrid catfish. Stocking ratios of hybrid catfish clarias macrocephalus x c. Pdf triploidy induction and growth performance of hybrid. Cold shock and heat shock were evaluated for their efficacy as methods of manipulating ploidy in hybrid catfish c.
Dianab aaquaculture and aquatic resources management, agricultural and aquatic systems and engineering program. Mortality and pathology of hybrid catfish, clarias macrocephalus gunther. Clarias gariepinus burchell, associated with edwardsiella ictaluri infection in southern thailand. Evaluation of local feed resources for hybrid catfish clarias. The fingerlings are produced in over 70% of the functional hatcheries in the country. Chicken processing wastes, prin bones as a fish feed began in 1986.
Citeseerx document details isaac councill, lee giles, pradeep teregowda. Evaluation of local feed resources for hybrid catfish. Clarias gariepinus or african sharptooth catfish is a species of catfish of the family clariidae, the airbreathing catfishes. Hybridization between two different species for the same group of fishes may produce fertile hybrid f1. The most effective method of inducing triploidy was cold shock at 6 oc applied of 25 min which. Nutritional researches on hybrid clariid catfish clarias macrocephalus x c. A perspective on breeding and genetics of walking catfish. The most polymorphic locus was ncmg12 with 21 alleles while the least polymorphic locus was ncmh2 with only two alleles. Clarias gariepinus burchell, 1822 1819 and from hatcherybred individuals, as observed in other farmed fish 2021. The animal diversity web is an educational resource written largely by and for college students. Trypanosomiasis in hybrid catfish clarias macrocephalus x clarias gariepinus and other freshwater fishes article pdf available in songklanakarin journal of science and technology 27suppl. Aquaculture elsevier aquaculture 151 1997 219224 stability and bioavailability of vitamin cglucose in clarias hybrid catfish clarias gariepinus x clarias macrocephalus jowaman khajarem, sarote khajarem department of animal science, faculty of agriculture, khon kaen university, khon kaen 40002, thailand abstract a stable form of vitamin c, ascorbateglucose, was tested for stability.
Growth performance of hybrid catfish fingerlings will not be negatively affected by partially replacing fish meal with shrimp head meal. Adw doesnt cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Because of the widespread farming, captive bighead. Affected fish are lethargic and anorexic and show yellow pigmentation of the s.
The broadhead catfish clarias macrocephalus is an economically important airbreathing catfish that is a native of southeast asia. Clarias macrocephalus x the introduced african sharptooth walking catfish, clarias gariepinus. Molasses was designed to be main combination between wheat flour and rice bran with 50. Information about the openaccess article trypanosomiasis in hybrid catfish clarias macrocephalus x clarias gariepinus and other freshwater fishes in doaj. A perspective on breeding and genetics of walking catfish in. Itis taxonomy is based on the latest scientific consensus available, and is provided as a general reference source for interested parties. To evaluate the suitability of cassava leaf meal and shrimp head meal. However, in hybrid catfish clarias macrocephalus x c. Clarias gariepinus x clarias macrocephalus scienceasia. The african catfish clarias gariepinus and clarias. This study reports esc in hybrid catfish, clarias macrocephalus gunther. Four practical diets containing 0%, 10%, 20% and 40% pkm, together with another two diets containing 20% and 40% pkm with 1. Gariepinus and nile tilapia oreochromis niloticus in intensive polyculture system nguyen thanh long1 and yang yi2 1college of aquaculture and fisheries, cantho university, vietnam 2asian institute of technology, thailand aquaculture crsp aarmait.
Senanan w, kapuscinski ar, nanakorn u, miller lm, 2004. Pdf effects of parental strains and heterosis of the. Clarias gariepinus is a cultured fish of major economic importance in thailand. Media in category clarias macrocephalus the following 4 files are in this category, out of 4 total. Clarias gariepinus, which is generally considered to be one of the most important tropical catfish species for aquaculture, has an almost panafrican distribution, ranging from the nile to west africa and from algeria to southern africa.
The aim of this thesis was to examine the current feeding situation for fresh water fish in central vietnam, to evaluate the potential nutritive value of locally available feed resources for hybrid catfish clarias macrocephalus x c. Ms thesis, asian institute of technology, bangkok, thailand. Occipital process wide, broadly curved, with length 35 times in its width. Application of cell culture from hybrid catfish clarias. Bioaccumulation of cadmium in an experimental aquatic food chain involving phytoplankton chlorella vulgaris, zooplankton moina macrocopa, and the predatory catfish clarias macrocephalus x c. The fish is farmed in ponds for use in human consumption in countries such as thailand thai. These images by contributor jeanfrancois helias depict a hybrid between c. In the past, the supply of walking catfish came solely from the wild. However, it is not a legal authority for statutory or regulatory purposes. Mortality and pathology of hybrid catfish, clarias. Bioaccumulation of cadmium in an experimental aquatic food. An investigation into the status of thai native catfish clarias macrocephalus, exotic african catfish c.
Suitability of different formalincontaining fixatives for the eggs of freshwater asian catfish, clarias macrocephalus gunther. Gene expression of cytochrome p450 1a in hybrid catfish. Triploidy induction and growth performance of hybrid. Intraspecific hybridization of local and exotic clarias. The broadhead catfish clarias macrocephalus is an economically important air breathing. Seed production of the native catfish clarias macrocephalus 1999 pdf. Artificial reproduction and pond rearing of the african catfish, clarias gariepinus in sub sahara n africa a handbook fao fisheries technical paper. Maximum size is 700 mm total length, although specimens up to. Seed production of the native catfish clarias macrocephalus. Pdf culture of hybrid magur clarias gariepinus x clarias. In africa, this catfish has been reported as being second in size only to the vundu of the zambesian waters, although fishbase suggests the african sharptooth catfish surpasses that species in both maximum length and weight. Evaluation of different carbon sources for polyculture of.
Not long past, the hybrid catfish has faced slow growth and poor survival rate. A study was conducted on the rearing of hybrid magur clarias gariepinus x clarias macrocephalus which was introduced by private fish seed traders in assam in 1994 with the objective of. Abstract three types of primary cell cultures were established from organs of hybrid catfish clarias gariepinus x clarias macrocephalus. Dietary arginine requirement of fingerling hybrid clarias. Clarias macrocephalus exposed to chlorpyrifos or carbaryl insecticides. Preliminary results on the morphological characterisation of. For each species, about half of them were bought at can tho market and the others at thu due and binh chanh markets. The combination of these characters are diagnostic for the species ref. Clarias is a genus of catfishes order siluriformes of the family clariidae, the airbreathing catfishes.
Triploidy induction and growth performance of hybrid catfish. Cell cultures from caudal trunk and gill were composed of mixed cells of fibroblasts and epitheloids, while cell cultures from the liver. Gene expression of cytochrome p450 1a in hybrid catfish clarias gariepinus. The catfish population is also threatened by escaped hybrids born from female c. Thirty tilapia and forty hybrid catfish fingerlings were stocked in each concrete tank with 3. Cell cultures from caudal trunk and gill were composed of mixed cells of fibroblasts and epitheloids, while cell cultures from the liver were. Trypanosomiasis in hybrid catfish clarias macrocephalus x.
In recent years, jaundice disease in farmed hybrid catfish in thailand has caused high levels of mortalities. The significance of photoperiodicity, water temperature and an inherent endogenous rhythm for the production of viable eggs by the african catfish, clarias gariepinus, kept in subtropical ponds in israel and under israeli and dutch hatchery conditions. In the past, the supply of walking catfish came solely from the. The name is derived from the greek chlaros, which means lively, in reference to the ability of the fish to live for a long time out of water. These reproductive migrations typically take place shortly after the onset of the rainy seasons. To determine the dietary requirement of lysine for hybrid catfish and to estimate the requirements for the other essential amino acids eaa by using the ideal protein concept. Diets were prepared by supplementing with moringa leaf at 0, 5, 10 and 15%, all diets contained 35 % crude protein and isocaloric diets of 3,700 kcalkg. Clarias gariepinus can be distinguished from other species of clarias by an elevated number 24110, depending on size of long, thin gill rakers on the first gill arch teugels 1986. Jaundice disease in the farmed catfish hybrid, clarias. A study of density of hybrid catfish clarias gariepinus x clarias macrocephalus to quantity of dissolved carbon dioxide in water. Hybridization is a dormant major problem in seed production and hatchery returns for growout farms.
Clarias macrocephalus gunther during an annual reproductive cycle. The dietary arginine requirement of fingerling hybrid clarias clarias gariepinus. Protein sparing of hybrid clarias catfish clarias macrocephalus. Vitamin c, growth, feed utilization, haematology, clarias gariepinus introduction the african catfish, clarias gariepinus is the most popular and widely cultivated fish in nigeria 1. Clarias gariepinus burchell, cultured in southern thailand. In thailand, it was thought wrongly as female of clarias batrachus ref 2686. Effects of parental strains and heterosis of the hybrid between clarias macrocephalus and clarias gariepinus.