Comparison of parasitic helminth infection between the different age groups of Clarias gariepinus from Asa dam Ilorin, north-central Nigeria

A total of 160 specimens of Clarias gariepinus comprising three age groups – juveniles (standard length 10.0 – 29.9 cm), sub-adults (fish length 30.0 – 39.9 cm) and adults (fish length 40.0 – 59.9 cm) were collected over a period of 8 months from Asa dam, a major river in Ilorin. The fish length and weight ranged from 12.5 to 41.0 cm and 152 to 597 g respectively. They were subjected to parasitological examinations. two cestode types - Amonotaenia sp and Polyonchobothrium clarias; two nematode types - Paracamallanus sp and Procamallanus laevionchus and one acanthocephalan – Neoechinorhynchus rutili were detected. Eighty-eight parasites were recovered. 27.5% of all fish examined showed parasitic infection. Helminth infection was found in juveniles and sub-adults only. Infection rate was higher in sub-adults than in juveniles

TRIVALENT CHROMIUM (CR+3) IN DIETARY CARBOHYDRATE AND ITS EFFECT ON THE GROWTH OF COMMONLY CULTIVATED FISH

Trivalent chromium (Cr+3) is an essential trace mineral for fish bio-physiological functions. Researches on Cr+3 in the form of organic compound indicated that the mineral affected the bio-activity of insulin, the blood glucose influx, and subsequently the blood glucose metabolic rate. By increasing the blood glucose metabolism, dietary carbohydrate will be more efficiently used as a main energy source, thereby, dietary protein could be efficiently retained as for somatic growth. Researches on various feeding habits of fish (e.g. gouramy-herbivorous fish, tilapia-omnivorous fish, and catfish-carnivorous fish) showed that dietary Cr+3 in certain amount increased diet utilization and the fish growth. Keywords: Blood glucose, chromium, feed, fish, growt

ANALISIS KUALITAS AIR KOLAM PEMBESARAN IKAN LELE SANGKURIANG (Clarias gariepinus Burchell) DI UNIT PELAKSANAAN TEKNIS DAERAH PERIKANAN BUDIDAYA AIR PAYAU DAN LAUT KARANG INTAN KALIMANTAN SELATAN

Kualitas air menjadi faktor penunjang dalam pembesaran ikan budidaya. Ikan yang dapat hidup dalam kondisi air yang terbatas yaitu ikan lele sangkuriang (Clarias gariepinus Burchell). Ikan lele sangkuriang (Clarias gariepinus Burchell) merupakan salah satu komoditas perikanan air tawar yang banyak dibudidayakan dan dikonsumsi oleh masyarakat. Penelitian ini dilaksanakan di Unit Pelaksanaan Teknis Daerah Perikanan Budidaya Air Payau dan Laut Karang Intan, Jl. Irigasi BRK. III Desa Jingah Habang, Kecamatan Karang Intan, Kabupaten Banjar, Provinsi Kalimantan Selatan. Penelitian ini bertujuan untuk mengetahui kesesuaian kualitas air pada kolam pemijahan dan pendederan ikan lele sangkuriang (Clarias gariepinus Burchell) berdasarkan Standar Nasional Indonesia dan mengetahui persentase mortalitas benih ikan lele sangkuriang (Clarias gariepinus Burchell) pada kolam pendederan. Hasil penelitian menunjukkan bahwa parameter yang tidak sesuai Standar Nasional Indonesia pada kolam pendederan adalah parameter suhu yang terlalu tinggi dan Dissolved Oxygen terlalu rendah. Tingkat mortalitas benih ikan lele sangkuriang (Clarias gariepinus Burchell) pada kolam pendederan sangat drastis kematiannya dikarenakan tidak sesuai padat tebar dengan ukuran hapa maka ikan tidak bisa aktif bergerak   Water quality is a supporting factor in the enlargement of cultivated fish. Fish that can live in limited water conditions are sangkuriang catfish (Clarias gariepinus Burchell). Sangkuriang catfish (Clarias gariepinus Burchell) is a freshwater fishery commodity that is widely cultivated and consumed by the community. This research was conducted at the Regional Technical Implementation Unit for Brackish Water and Karang Intan Marine Aquaculture, Jl. BRK irrigation. III Jingah Habang Village, Karang Intan District, Banjar Regency, South Kalimantan Province. This study aims to determine the suitability of water quality in the spawning and nursery ponds of sangkuriang catfish (Clarias gariepinus Burchell) based on Indonesian National Standards and to determine the percentage of mortality of sangkuriang catfish (Clarias gariepinus Burchell) seeds in nursery ponds. The results showed that the parameters which did not comply with the Indonesian National Standard in the nursery pond were the temperature parameters that were too high and Dissolved Oxygen was too low. The mortality rate of sangkuriang catfish (Clarias gariepinus Burchell) seeds in the nursery pond is very drastic, the death rate is not suitable for the stocking density with the hapa size, so the fish cannot actively mov

Ontogeny of the osteocranium in the African catfish, Clarias gariepinus burchell (1822) (Siluriformes: Clariidae): Ossification sequence as a response to functional demands

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Proceedings of a workshop on the development of a genetic improvement program for African catfish Clarias gariepinus

This proceedings include papers present at the workshop held from 5 to 9th Nov 2007 in Accra, Ghana. The areas cover 1)the present state of the catfish industry in Africa 2)Catfish reproductive management and grow out 3)Catfish nutrition and feeds 4)The application of genetic principles to catfish genetic improvement programs 5)Recommendations on how to best approach the issue of genetic improvement programs for catfish.Genetics, Biotechnology, Reproduction, Biological production, Nutrition Clarias gariepinus

Comparative study of hatching rates of African catfish (Clarias gariepinus Burchell 1822) eggs on different substrates

The hatching rates of African catfish (Clarias gariepinus) eggs on four natural substrates: the roots of Nile cabbage (Pistia stratiotes), water hyacinth (Eichhornia crassipes), pond weed (Ceratophyllum dermasum) and green grass leaves (Commelina sp.), and four artificial substrates: sisal mats, nylon mats, papyrus mats and kakaban mats, was assessed. Concrete slabs were used as control. The natural substrates performed better than the artificial ones. Pistia roots gave the best mean hatching rate of 66.2 ± 3.62%. Green grass leaves were second with a mean rate of 54.0 ± 3.46%, water hyacinth was third with 49.7 ± 3.16% and Ceratophyllum fourth with a mean of 13.0 ± 2.37%. Concrete slabs gave a mean rate of 18.6 ± 2.8%, sisal mats 18.6 ± 2.0%, papyrus 12.2 ± 1.2% and kakaban 11.8 ± 1.9%. Nylon mats were the last, with a mean rate of 4.0 ± 0.7%. The best performing natural substrates were those with the ability to float and thin fibrous roots that seemed to allow higher aeration of the eggs during incubation. The cost of using natural substrates was minimal

Substituting fish meal with grasshopper meal in the diet of Clarias gariepinus fingerlings

The effect of inclusion of grasshopper meal on the growth, feed conversion ratio and survival of Clarias gariepinus fingerlings of mean weight 9.71g was investigated. The results show that the best growth and food utilization indexes were recorded in the fingerling fed with 10% grasshopper meal and 30% fish meal, while the poorest growth and food utilization indexes were recorded with the diet containing 25% grasshopper meal and 15% fish meal. The best survival of 100% was observed in the diet containing 30% grasshopper meal and 10% fish meal while the worst survival of 73.3% was observed in the diet containing 25% grasshopper meal and 15% fish mea

Haematological Response of Clarias Gariepinus to Rubber Processing Effluent

Industrialization has led to huge waste generation over the last decades, the absence of adequate facilities for treating such wastes in most developing nations has led to the discharge of effluents into the environment without proper treatment. Toxicological effects of effluents from rubber processing plant (collected during the period of low rivertide i.e. between October 2012 and February 2013) were carried out in this study. Lethal concentration (96-h LC50) was evaluated using 0.25mg/L, 0.30mg/L, 0.35mg/L and 0.40mg/L while sub-lethal effects (42 days) was carried out on haematological parameters like Red Blood Cell (RBC), White Blood Cell (WBC), Haemoglobin (Hb), Packed Cell Volume (PCV), Mean Corpuscular Volume (MCV), Mean Corpuscular Haemoglobin (MCH) and Mean Corpuscular Haemoglobin Concentration (MCHC) using 0.064mg/L, 0.048mg/L, 0.032mg/L and 0.016mg/L which are the 20%, 15%, 10% and 5% of the 96-h LC50 value. Mortality increased as the concentrations of the effluent increases and 0.32mg/L was obtained as LC50. In comparison with the control, the mean value obtained for PCV, HB and RBC showed significant differences (P<0.05) most especially at highest concentration while there was no significant difference in all values obtained for WBC, MCV, MCH and MCHC. It was concluded that the rubber processing effluent had some negative effect on the haematology of Clarias gariepinus. Therefore, it is recommended that the effluent should be properly treated before discharge into the environme

Acute toxicity of synyhetic resin effluent to African Catfish, Clarias gariepinus [BURCHELL, 1822].

Aquatic pollution as a field has gained a lot of attention over the decades majorly because of the vital role the aquatic environment plays in the human lifecycle. Indusrial wastewaters are often generated and discharged into the environment without treatment. Toxicity of effluents from Synythetic Resin production plant were evaluated in this study. Acute toxicity (96-h LC50) was evaluated using 0.23, 0.31, 0.35 and 0.39 mg/L of the effluent in a renewal bioassay procedure. Physicochemical parameters of the effluent were also evaluated, the values obtained for lead, cyanide, total suspened solid, total hadness, total dissolved solids and alkalinity were higher than the Federal Environmental Protection Agency standard specification for effluent discharge into aquatic environment and as such contributed to the effluent's toxicity. Mortality increased as the concentrations of the effluent increases and 0.355mg/L was obtained as LC50. The research eventually revealed that the synthetic resin effluent has a high level of toxicity to catfish. Deleterious effects such as biomagnification and other abberations may occur in man if exposed to substantial concentration of the effluent

BIOCHEMICAL PROFILE OF CLARIAS GARIEPINUS EXPOSED TO SUB-LETHAL CONCENTRATIONS OF CHEMICAL ADDITIVES EFFLUENT.

Chemicals such as industrial effluents induces some level of alterations in the naturally occuring chemical composition of aquatic phase which in turn alters the behavioural, biochemistry, and general physiology of aquatic fauna among which is catfish, Clarias gariepinus. Chemical additives effluent was analysed to determine its physicochemical parameters. Part of the result conforms to the Federal Environmental Protection Agencies standard specification for effluent discharge into the aquatic environment while other parameters like TDS, TSS, and Alkalinity deviated from the standard. The fish, Clarias gariepinus was exposed to 0.25mg/L, 0.30mg/L, 0.35mg/L and 0.40mg/L concentrations of the effluent for 96 hours and the LC50 value for the acute toxicity was found to be 0.335223mg/L. The impact of long term exposure to the effluent was also evaluated through changes of selected biochemical parameters using the 20%, 10%, 5% and 2.5% of the 96-h LC50 value for 42 days.the parameters measured are glucose, total protein, cholesterol, albumin and globulin. All the parameters recorded a significant difference in their values as against the control except cholesterol. The alteration in all parameters was significantly concentration and time dependent and this could be attributed to stress behavioural response as a result of the toxicity of the effluent