HETEROBRANCHUS BIDORSALIS PDF

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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A similar fertilization process was separately carried out for the female H. Growth, survival and production: That is, two bowls contained eggs from female H.

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The following growth and nutrient utilization parameters were evaluated:. Aeration was done continually throughout this period. The range of values recorded for dissolved oxygentemperature and pH were 1. Temperature was monitored with a simple mercury-in-glass thermometer graduated in 0.

Some water parameters were measured and recorded every week. Three pysico-chemical parameters dissolved oxygen, temperature and pH were measured in this study.

The coefficient of determination r 2 for length-weight relationships was strong 0. Feeds and water quality: Fish were not fed 24 h before the samples were collected to allow the intestinal contents to be digested. Therefore, ovaprim and male pituitary extract are recommended for commercial aquaculture practice.

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Heterobranchus – Wikipedia

You can sponsor this page. The experimental units were randomly allocated into 18 different circular flow-through tanks. Survival, growth and feed utilization of two clariid catfish Clarias gariepinusBurchell and Heterobranchus bidorsalisGeoffroy, and their reciprocal hybrids.

The pure line H. Among the Culturable food fish in Nigeria, catfish especially Clarias gariepinus and Heterobranchus sp.

ADW: Heterobranchus bidorsalis: CLASSIFICATION

The first female broodstock was administered ovaprim intramuscularly 0. They were brought into the laboratory in the morning and kept in separate fish tanks to acclimatize for 48 h before the experiment.

Stripped eggs were later fertilized with milt after sperm activation bidorslais initiated by the addition of 5 mL fresh water and checked for motility by microscopic examination Viveen et al. The growth of brown trout Salmo trutta Linn. This feeding habit of Nigerians tends to support the commercial propagation of clariid catfishes and this trend became noticeable bidorsali the late s.

Hetfrobranchus other projects Wikimedia Commons. The fish were kept in the rearing tanks to allow them recover from stress due to transportation and acclimatized them to their new environment. The growth of the aquaculture industry in Nigeria depends to some extent on the availability of fish seeds.

Induced propagation of African clariid catfish, Heterobranchus bidorsalis Geoffrey St Hillarie, using synthetic and homoplastic hormones. Daily specific growth rate declined from a maximum of 4.

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These include fast bidorsaliis rate, high resistance to disease, tolerance to adverse environmental conditions, ability to feed on wide range of feed and capacity to withstand low pH and oxygen Fagbenro et al. Growth of pure breed and hybrid of catfish Clarias gariepinus and Heterobranchus bidorsalis induced with synthetic hormone Ovaprim and pituitary glands of male and female Heterobranchus 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 study started. Since sinking pelleted feed was used, significant amount of feed might be wasted, this could account for high FCR bidorsaliw in this study.

Sign our Guest Book. All these water quality parameters fall within the range reported by Huet as good for pond fish culture. Nutrient composition of commercial feed Catco fish Concentrate-Coppens fed to frys of pure and hybrid heterpbranchus Each kg of the diet contained: Effect of mixed feeding schedules with varying dietary crude protein levels on the growth and feed utilization of Clarias gariepinus Burchell, fingerlings.

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