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):||1 July 2005|
|PDF File Size:||12.37 Mb|
|ePub File Size:||12.83 Mb|
|Price:||Free* [*Free Regsitration Required]|
According to Ayinla et al. Induced breeding and early growth of progeny from crosses between two African clariid fishes, Clarias gariepinus Burchell and Heterobranchus longifilis under hatchery conditions.
Comparative growth and survival of the catfishes: Effect of mixed feeding schedules with varying dietary crude protein levels on the growth and feed utilization of Clarias gariepinus Burchell, fingerlings.
Water quality parameters were generally within acceptable limits. Superclass Gnathostomata jawed vertebrates.
Economics of Periphyton-based aquaculture production in Bangladesh. Growth exponent, r 2: Heterobranchus bidorsalisthe African catfish or eel-like fattyfin catfishis an airbreathing catfish found in Africa.
Rearing conditions were similar to the ones used in the reproductive performance phase of the experiment. The protein requirements of most countries cannot be adequately met by poultry and livestock food.
The weight gain, average daily growth heterobfanchus specific growth rate of heterobranchks breed induced with MPE were the highest. Breeding and Cultivation of Fish. Survival rate was also calculated using the equation below Adebayo, Class Hsterobranchus ray-finned fishes.
High initial specific growth rates that decrease with increasing age and individual fish biomass and consequent increased metabolic costs followed typical pattern of fish growth Kerby et al.
The highest values for FI 3. Comparative evaluation of efficacy and cost of synthetic and non-synthetic hormones for artificial breeding of African catfish Clarias gariepinus Burchell, Confused by a class within a class or an order within an order?
Some simple methods for the assessment package of tropical fish stocks. Final length-weight relationship, correlation coefficient bivorsalis condition factor of study fish.
In order to estimate percent fertilization, a sample of egg from each replicate of each heterobranchis unit genetic cross were carefully collected on a petri dish which contained water.
This feeding habit of Nigerians tends to support the commercial propagation of clariid catfishes and this trend became noticeable since the late s.
The data were used to evaluate the growth performances. In this study, 3 female Heterobranchus bidorsalis3 male Heterobranchus bidorsalis and 3 male Clarias gariepinus were used for the experiment. Values for total ammonia nitrogen did not exceed 0. The goldfish Carassius auratus as a model for neuroendocrine signaling.
Heterobranchus bidorsalis, African catfish : fisheries
Heterobranchus bidorsalis Conservation status. Eighteen circular flow-through tanks were used as experimental culture system.
The Hague, The Heetrobranchus, Pages: Connect with us Help us improve the site by taking our survey.
The fingerlings were stocked in three 0. Water was changed regularly to prevent fry mortality caused by pollutants especially ammonia and inadequate dissolved oxygen. Temperature was monitored with a simple mercury-in-glass thermometer graduated in 0.
It also has high feed efficiency and utilization Adebayo and Biidorsalis, Studies on Heterobranchus species in Nigeria focused on stock and chromosome manipulations, performances of intraspecific hybrids and growth performances at different dietary compositions in indoor and outdoor concrete tanks Madu et al.
Comparative growth and survival of hybrids and putative parents. Though we edit our accounts for accuracy, we cannot guarantee all information in hetsrobranchus accounts. Evaluation of Clarias isheriensis Sydenham under semi-intensive management in ponds.
The snout is round and the eyes are lateral.
Optimum Growth Determination of Heterobranchus bidorsalis in Earthen Ponds
The mean weight g heterobrznchus total length cm of the fish from each treatment and its replicates were measured fortnightly. 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, Effect of mixed feeding schedules with varying dietary crude protein levels on the growth and feed utilization of Clarias gariepinus Burchell, fingerlings.
All these water quality parameters fall within the range reported by Huet as good for pond fish culture.