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.

Author: Malazshura Gardajinn
Country: Botswana
Language: English (Spanish)
Genre: Photos
Published (Last): 17 March 2016
Pages: 95
PDF File Size: 13.94 Mb
ePub File Size: 12.84 Mb
ISBN: 758-7-72450-488-3
Downloads: 41853
Price: Free* [*Free Regsitration Required]
Uploader: Kikus

Human uses

Abu Bakar and Z. There is increase global attention on aquaculture because of the need to augment fish production from the wild. Comparative evaluation of efficacy and cost of synthetic and non-synthetic hormones for artificial breeding of African catfish Clarias gariepinus Burchell, The pure and cross breeding of H. The parameters are water temperature measured with mercury-in-glass thermometer.

The numbers of hatchlings in each treatment unit were carefully counted and the hatching rate was determined using the equation below Adebayo, Effect of mixed feeding schedules with varying dietary crude protein levels on the growth and feed utilization of Clarias gariepinus Burchell, fingerlings. Feeding was done twice daily; morning 9: Acta Ichthyologica Piscatoria, The use of inter-specific hybrids in aquaculture and fisheries. Studies on growth performance and feed utilization of two Clariid catfish and their hybrid reared under different culture systems.

Preliminary studies on initiation of uniform size breeding line in Heterobranchus – Clarias gynogens. Heterobranchus bidorsalis is one of the two main genera of the African mud catfish Clarias and Heterobranchus widely cultured in Africa, Asia and Europe Adewolu and Adoti, ; Kori-Siakpere et al.

  GR48 AT COMMANDS MANUAL R1A PDF

The highest values for weight gain 5. In all, there were six genetic crosses representing six experimental units.

Both studies reported that pure breeds of fish species performed better than their hybrids. ADW doesn’t cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Research Journal of Environmental Sciences.

Textbook of Fish Culture: At the final harvest survival was A geometric growth curve was observed when the relationships between the two variables were plotted against each other. A similar crossing was done for the female H. The profitability of the heterlbranchus industry has become widely known in the last decade Ita, ; Huda et al.

Heterobranchus – Wikipedia

The computation of the data provides the following:. This is particularly important in heterrobranchus culture of acceptable fish species Clarias gariepinus and Heterobranchus sp.

Modified by Musschoot, Tobias. Reproductive performance of african clariid catfish Clarias gariepinus broodstocks on varying maternal stress.

Hybrid bidoraalis catfish production: Handbook for Common Calculations in Finfish Aquaculture. The frontal fontanelle is long and narrow while the occipital fontanelle is relatively long and is shaped like an oval. Specific growth rate SGR and condition factor K: Mean weight gain, PWG: International Journal of Zoological Research, 7: The present study yielded the best growth and production rates yet published in Nigeria on H.

IUCN Red List of Threatened Species

Classification Kingdom Animalia animals Animalia: Wet fertilization method was employed. The Physiology of Fishes, Volume 1: Length-weight relationships of nine fish species from Ologe Lagoon, Lagos, Nigeria. Water quality parameters of the culturing medium of pure breed and hybrid of Heterobranchus bidorsalis. Daily specific growth rate declined from a maximum of 4.

  JURNAL KEANEKARAGAMAN KUPU-KUPU PDF

However, the pure breeds and hybrids obtained from induction with the synthetic hormone ovaprim and male pituitary extract performed better than those induced with female pituitary extract. Also, Ojutiku reported that hybrid in most cases were superior to the parental strains in growth, food conversion and resistance to disease. Similar Articles in this Journal. In all, there were six bowls of eggs from three female H.

Determination of water quality parameters: Therefore, they are recommended for commercial aquaculture. Breeding and Cultivation of Fish. Nutrient composition of commercial feed Catco fish Concentrate-Coppens fed to frys of pure and hybrid catfish Each kg of the diet contained: However, it was low 0. In this study, 3 female Heterobranchus bidorsalis3 male Heterobranchus bidorsalis and 3 male Clarias gariepinus were used for the experiment.

The cause of the inconsistencies bdiorsalis studies might be due to reasons such as experimental design, inherent variation in species and water quality factors. The pectoral spine is smooth.

Survival, growth and feed utilization of two clariid catfish Clarias gariepinusHeterobrancbus and Heterobranchus bidorsalisGeoffroy, and their reciprocal hybrids.

Class Actinopterygii ray-finned fishes.

Maximum reported size for West Africa: The protein requirements of most countries cannot be adequately met by poultry and livestock food. Preliminary study on physico-chemistry and comparative morphometric heterbranchus of Cynothrissa mento Regan, from Ologe, Badagry and Epe Lagoons, Lagos, Nigeria.