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.
|Published (Last):||11 January 2007|
|PDF File Size:||9.44 Mb|
|ePub File Size:||20.61 Mb|
|Price:||Free* [*Free Regsitration Required]|
Species Heterobranchus bidorsalis African catfish. Standing crop at harvest was 10, kg ha Use of Tadpole meal as substitute for fish meal in the diet of Heterobranchus bidorsalis Geofrey st, Hillaire, Final length-weight relationship, correlation coefficient and condition factor of study fish. Class Actinopterygii ray-finned fishes.
The percentage fertilization obtained in the pure breed H. Acta Ichthyologica Piscatoria, The condition factor was calculated by the formula Pauly, Aeration was done continually throughout this period. This situation triggered off interest in the culture of clariid catfishes as commercial food fish.
Phylogenetic diversity index Ref. The protein requirements of most countries cannot be adequately met by poultry and livestock food. Parameters of length-weight relationship of pure breed and hybrid of catfish Clarias gariepinus and Heterobranchus bidorsalis induced with synthetic hormone Ovaprim and pituitary bieorsalis of male and female Heterobranchus bidorsalis.
There preference as cultured species is due to several factors. The eggs from each female H. That is, two bowls contained eggs from female H. Feed intake was determined as quantity of feed fed per day and was calculated as:.
Heterobranchus bidorsalis, African catfish : fisheries
Hatchery raised gravid broodstocks were selected from Lagos State University hatchery. The postorbital bones are completely united. Relationship between mean body weight and mean standard length of Heterobranchus bidorsalis in June.
Hatching nets were used as egg collectors. Effects of II-esoxcorticosterone-acetate and carp pituitary suspension heterlbranchus follicle maturation in the ovaries of African catfish Clarias lazera C and V.
Heterobranchus – Wikipedia
This high demand of the clariids resulted in generally high prices which serve as an added inducement to would-be fish farmers or groups interested in commercial fish culture. Determination of water quality parameters: Comparative survival and growth rate of Clarias gariepinus and heteroclarias hathclings fed live and frozen daphnia. They are reared all-over the country especially in the south and have very good commercial value in Nigerian markets Adewolu and Adoti, ; Owodeinde and Ndimele, Practical Manual for the culture of the African Catfish Clarias gariepinus.
Spatial and temporal variations of some heavy metals in water, sediment and Chrysichthys nigrodigitatus Lacepede, from ologe lagoon, lagos, Nigeria.
International Journal of Zoological Research, 7: Comparative survival and growth rate of Clarias gariepinus and heteroclarias hathclings fed live and frozen daphnia. All these water quality parameters fall within the range reported by Huet as good for pond fish culture. The milts from one H. 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.
Three hormones were used in this study; one synthetic and two natural hormones. How to cite this article: The highest values for weight gain 5. This heteroobranchus would allow consolidation of smaller fish into fewer ponds for additional growth.
The synthetic hormone used in the process is interspecific, heterobranchua it is efficient even in the case of taxonomically very different fishes Naeem et al. The effects of water hyacinth Eichhornia crassipes [Mart. The present study yielded the best growth and production rates yet published in Nigeria on H.
The first female broodstock was administered ovaprim intramuscularly 0. This fish is commercially fished for human consumption.
To cite this page: