This study was carried out to measure the optimum growth of Heterobranchus bidorsalis and the best time to crop under maximum utilization of. Biology. Hardly anything is known about the biology of this species (Ref. ). Maximum reported size for West Africa: mm TL (Ref. ). Trusted. Information about the classification of Heterobranchus bidorsalis. Includes facts, pictures and articles.
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Retrieved 14 January The condition factor was calculated by the formula Pauly, In other projects Wikimedia Commons. The protein requirements of most countries cannot be adequately met by poultry and livestock food. Survival, growth and feed utilization of two clariid catfish Clarias gariepinusBurchell and Heterobranchus bidorsalisGeoffroy, and their reciprocal hybrids. Heterobranchus bidorsalis Conservation status.
The parameters are water temperature measured with mercury-in-glass thermometer. According to Ayinla et al. Confused by a class within a class or an order within an order? Determination of water quality parameters: A similar observation was reported by Ataguba et al. Comparative survival and growth rate bidorslis Clarias gariepinus and heteroclarias hathclings fed live and frozen daphnia.
At two weeks interval, the fish were sampled with a 2.
This situation triggered off interest in the culture of clariid catfishes as commercial food fish. The eggs from each female H.
They are very popular among fish farmers and consumers alike. ADW doesn’t cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Nutrient utilization parameters Feed Intake FI: On the 30th of Augustthe ponds were drained; all the fish were removed, counted and weighed to determine the survival rate and standing crops. They reported that female Heterobranchus bidorsalis injected with ovaprim had significantly higher number of fertilized eggs and higher hatching rate than their counterparts injected with pituitary extract from Bidorsaliss bidorsalis.
After the evaluation of the reproductive performance of the pure breed and hybrid Clariabranchus which lasted about 14 days, the growth performance aspect of the hegerobranchus started.
Optimum Growth Determination of Heterobranchus bidorsalis in Earthen Ponds
Stripped eggs were later fertilized with milt after sperm activation was initiated by the addition of 5 mL fresh water and checked for motility by microscopic examination Viveen et al. Articles with ‘species’ microformats.
Percentage fertilization, Hatching rate and survival rate 14 days Post-hatch of pure breed and hybrid catfish Clarias gariepinus and Heterobranchus bidorsalis induced with synthetic hormone Ovaprim and pituitary of Heterobranchus bidorsalis. Optimum growth performances of fingerlings of artificially propagated Heterobranchus bidorsalis were investigated. This study was carried out to measure the optimum growth of Heterobranchus bidorsalis and the best time to crop under maximum utilization of feed in semi-intensive pond condition.
The last set of two bowls contained eggs from female H. Austin Anetekhai and Mr. After linearization, the equation became:. The pH ranged between 7. Hatching nets were used as egg collectors. Each kg of the diet contained: Three pysico-chemical parameters dissolved oxygen, temperature and pH were measured in jeterobranchus study. Several investigators have recently demonstrated that Heterobranchus bidorsalis can be grown to commercial size in various types of culture systems Madu et al.
Effect of mixed feeding schedules with varying dietary crude protein levels on the growth and feed utilization of Clarias gariepinus Burchell, fingerlings.