Skip to main content

Intensive Production of the African Catfish Clarias gariepinus (Burchell, 1822) Fingerlings Using Local Materials in Recycled Water | Chapter 06 | Advances in Agriculture and Fisheries Research Vol. 1


This study was conducted with the aim of producing intensively and cheaply the fry of the African catfish Clarias gariepinus at the Akak Essatolo Fish Farm in Ebolowa, South Region Cameroon. For that, 10 broodstock of C. gariepinus, were used for the artificial reproduction. Pituitary extracts and Ovaprim hormones were used to induce oocytes maturation on females. Eggs were obtained by abdominal pressure of the female. Wicks (or Local raffia fibbers (Raphia regalis)) and mesh frame were used as incubators of fertilized eggs. 12 experimental batches each consisting of 50 g of fertilized eggs were spread in triplicates on both types of incubators previously arranged in closed-circuit tanks. Fertilized eggs were enumerated by direct observation. At the end of the hatching (D0) and of vitelline resorption (D3), larvae of each experimental lot were counted. The results obtained indicate that: Similar (P=.05) absolute and relative fecundities used were recorded in all treatments. Female eggs induced with pituitary extracts and incubated on raffia fibbers recorded lower (P˂.05) fertilization and hatching rates. All other treatments were comparable (P=.05) for these parameters. Deformed larvae rates were comparable (P=.05) for all treatments. Survival rates at the end of yolk sac resorption (J3) were higher (> 70%) in all treatment. However treatment with Ovaprim and wick, showed a survival rate (71.1%) significantly (P ˂ .05) lower than the other treatments (> 80); which have otherwise remained comparable (P=.05). It was concluded that, the superiority of ovaprim at the beginning of reproduction is offset by the poor survival rate, which is better with the pituitary gland. Then, the use of the synthetic hormone is not economical for optimal production of C. gariepinus fry. In the same way a mastery of the use of the raffia fibbers will improve the cost-effectiveness and consequently will decrease the production costs.

Author(s) Details


Claudine Tekounegning Tiogué
Laboratory of Applied Ichthyology and Hydrobiology, School of Wood, Water and Natural Resources (SWWNR), Faculty of Agronomy and Agricultural Sciences (FAAS), The University of Dschang, P.O.Box 786, Ebolowa Antenna, Cameroon.

Delphin Alfred Eva Ambela
Institute of Fisheries and Aquatic Sciences of Yabassi, The University of Douala, P.O.Box 2701, Douala, Cameroon.

Paulin Nana
School of Wood, Water and Natural Resources (SWWNR), Faculty of Agronomy and Agricultural Sciences (FAAS), The University of Dschang, P.O.Box 786, Ebolowa Antenna, Cameroon.

Minette Eyango Tomedi–Tabi
Institute of Fisheries and Aquatic Sciences of Yabassi, The University of Douala, P.O.Box 2701, Douala, Cameroon.

Comments

Popular posts from this blog

Empowerment and Leader Member Exchange towards Organizational Citizenship Behavior Readiness among Government Workforce in Malaysia | Book Publisher International

  State agencies are among the most significant entities that represent the public's needs, and their programmes are essential to a state's and the nation's economic growth and development. State agencies have been rife by public concerns for years, as demonstrated by the Public Complaints Bureau, as problems of inefficiency in service quality and delivery have yet to meet the public's standards. With the support of 15 employees from state agencies on Malaysia's east coast, this study aims to achieve three targets. The first and second objectives are to investigate the ties between leader-member exchange (LMX) and OCB empowerment. The final aim is to define the most significant factors that affect OCB willingness. A total of 288 people took part in the survey, which was conducted using a cluster sampling process. The survey items had achieved the necessary reliability, according to the pilot test results, and some sub-dimensions were renamed after factor analysis.

The Utilization of Agro-Waste: A Nanobiotechnology Point of View | Chapter 10 | Recent Advances in Biological Research Vol. 5

Aims: To review the utilization of agro-waste in the eco-friendly synthesis of nanoparticles and their biomedical, catalytic and industrial applications. Study Design: A review. Place and Duration of Study: This review was carried out in the interim of three weeks exploiting all relevant data, literature and publications where necessary. Methodology: Profound gathering of literatures/publications and reviews were employed with all carefulness and professional courtesy; enough useful information were gathered over time. The introduction emphasizes the dawn of science and technology, when great ideas were still latent later leading to the advent of history changing innovations like the completion of human genome and then the birth of nanotechnology. Although, nanotechnology had been known decades been popularized by Richard Feynman in his talks in the year 1959; and in this present dispensation, nanotechnology has been a solution to many intricate challenges/ t

Re-asserting Cultural Perspectives: Old People and New Ideas in Bole Butake’s Lake God and The Survivors and Sankie Maimo’s Succession in Sarkov | Chapter 10 | Perspectives of Arts and Social Studies Vol. 2

African cultures have undergone transformations from the colonial period to the present, often to the detriment of its cultural evolution and within the larger global community. As it were, colonial education subordinated African communalism and created in its place an anti-African spirit evident in the assimilation of western values. This did not only end up in a kind of cultural betrayal, but also posed as a serious threat to the dignity and identity of the people. Those who fall prey to this kind of cultural imperialism are the young people who are often irrationally carried away by western fashion and modes that they tend to neglect and/or forget their cultural ways of life as they join the race of “progress.” This situation has given rise to a conscious effort by creative writers to re-assert and protect African values while at the same time liberating themselves from the longstanding western effort at suppressing, controlling and dominating their thoughts particularly through n