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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The fingerlings were stocked in three 0. Water was changed regularly to prevent fry mortality caused by pollutants especially ammonia and inadequate dissolved oxygen. Bilateria bilaterally symmetrical animals.
ADW: Heterobranchus bidorsalis: CLASSIFICATION
The hidorsalis growth curve shows the best time to harvest H. Research Journal of Environmental Sciences. Classification Kingdom Animalia animals Animalia: They are very popular among fish farmers and consumers alike.
The other half of the eggs bidorsais bowl in that set was fertilized by milt from one C. Relationship between mean body weight and mean standard length of Heterobranchus bidorsalis in June.
Both studies reported that pure breeds of fish species performed better than their hybrids. Heyerobranchus also has high feed efficiency and utilization Adebayo and Olanrewaju, The use of inter-specific hybrids in aquaculture and fisheries.
The highest values for weight gain 5.
The weight gain, average daily growth and specific growth rate of pure breed induced with MPE were the highest. Views Read Edit View history. Sign our Guest Book. The pure line H. The range of values recorded for dissolved oxygentemperature and pH were 1. Use of Tadpole meal as substitute for fish meal in the diet of Heterobranchus bidorsalis Geofrey st, Hillaire, Broodstock collection and selection: However, it was low 0.
Equation 1 was linearized by logarithmic transformation to enable the estimation of the values of constants a and b using least square linear bidorsalid Zar, Studies into artificial spawning in this species showed that spawning can be induced in females by single intramuscular hormone injections of carp pituitary suspensions.
Heterobranchus bidorsalis and their hybrids. Comparative growth and survival of the catfishes: Mean condition factor K was 1.
The fish were kept in the rearing tanks to allow them recover from stress due to transportation and acclimatized them to their new environment. Values for total ammonia nitrogen did not exceed 0. Short description Morphology Morphometrics Dorsal spines total: Culture of fish in Nigeria is relatively high because of the awareness of aquaculture, availability of large and cheap water and strong interest of providing food heterobranchhs making profit Adebayo and Popoola, ; Owodeinde and Ndimele, However, the pure breeds and hybrids obtained from induction with the synthetic hormone ovaprim bidorsals male pituitary extract performed better than those induced with female pituitary extract.
Relationship between mean body weight and mean standard length of Heterobranchus bidorsalis in July.
Van Der Hurk, Some water parameters were measured and recorded every week. Survival rate was also calculated using the equation below Adebayo, The effects of water hyacinth Eichhornia crassipes [Mart.
Maximum reported size for West Africa: After all measurements, the fish were revived in fresh water and then returned to the ponds. Each kg of the diet contained: