CULTURE OF DIPLOID AND TRIPLOID OF (HETEROBRANCHUS BIDORSALIS AND CLARIAS GARIEPINUS) FED WITH DAPHNIA. A RESEARCH PROJECT TOPICS ON FISHERY AND AQUACULTURE

CULTURE OF DIPLOID AND TRIPLOID OF (HETEROBRANCHUS BIDORSALIS AND CLARIAS GARIEPINUS) FED WITH DAPHNIA. A RESEARCH PROJECT TOPICS ON FISHERY AND AQUACULTURE

ABSTRACT

This research work was carried out to examine the effect of cold and warm shock on hybridized fish order of Siluriformes (Heterobranchus bidorsalis and Clarias gariepinus) in indoor tanks crossing of two different species is a process called hybridization, with the offspring known as the hybrids. The length of the cold shock, warm shock and even the diploid fish ranges from 0.7 to 3.6cm, 0.6 to 3.5 cm and 0.6 to 2.7m while their weight varies from 0.008 to 0.226g, 0.008 to 0.242g and 0.009 to 0.140g after 6 weeks of culture. The hatchability rate for the triploid fish was low. The feed used in raising the hatchlings for the first two weeks were mostly live feed daphnia which encourage  growth and are preferred by the fish. This study has shown that bigger Heteroclarias was produced when triploid cold shock than warm shock and diploid. Thus this research has provided information that will enhance the production of bigger fish in aquaculture.

CHAPTER ONE
1.0     Introduction
Aquaculture in Nigeria is in the developing stage, because it has not been able to meet demand and supple of the ever-increasing human population (Ojutiku, 2008).The development of improved fish seed stocks that can contribute to increased fish production and at the same time ensuring protection of biodiversity and the environment is seen as one of the key solutions to securing future food requirement of the growing world population (Lincoln,1980).Genetics and the successful application of breeding programs in crops and livestock have provided the impetus for the governments it has been acknowledged as the most efficient means of providing protein rich food, income generation and employment opportunities for the populace. (Ojutiku 2008) noted the interest in fish culture is growing very rapidly in Nigeria but the scarcity of fingerlings of widely acceptable species of catfish such as Heterobranchus species (Val. 1840) and Clarias species tend to constitute a major constraint to the rapid development of fish farming in Nigeria. He also mentioned that economically productive aquaculture, is heavily dependent on adequate supply of fish stock to ponds and other culture systems.
One of the methods of improving growth performance of aquaculture species is through biotechnology. This could be through hybridization, genetic engineering and chromosome manipulation.

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CULTURE OF DIPLOID AND TRIPLOID OF (HETEROBRANCHUS BIDORSALIS AND CLARIAS GARIEPINUS) FED WITH DAPHNIA. A RESEARCH PROJECT TOPICS ON FISHERY AND AQUACULTURE