This present study was conducted to determine fry production in different male-female sex ratios of Oreochromis niloticusbroodstock order improve production, which handicapped the development fish farming northern Senegal. A total 180 broodfish (47 males and 133 females) were stocked at a density 2 /m2and replicated three times for each ratio 1:2, 1:3and 1:4 (male : female). Mean body weight ra...

Objective 1. Identify diet formulations to improve reproductive performance (egg biochemical composition, fecundity, egg and fry quality) of catfish and determine associated effects on production costs. a. Manipulate dietary protein concentration and lipid sources and assess reproductive performance and diet effects on production costs (Tank Trial 1). b. Refine dietary protein and lipid sources...

The white grouper (Epinephelus aeneus) is a protogynous hermaphrodite species found throughout the southern Mediterranean Sea and along the west coast of Africa to southern Angola. The species has a high market value, excellent taste, rapid growth rate, hardiness and relatively high disease resistance. Therefore, it is a promising candidate for intensive aquaculture and in 2010 an Epinephelus a...

General introduction Aquaculture production has continued to grow at an ever increasing rate from less than 1 million tonnes in the 1950s to nearly 60 million tonnes in 2004 (FAO 2006). Much of this increase occurring since the mid 1980s with the vast percentage of the production being from Asia and the Pacific rim, particularly China. The percentages by volume are China 69.7%, Rest of Asia 21....

Intensive tilapia production (Oreochromis niloticus) is an emerging industry in West Africa. Access and availability of economically viable formulated commercial fish feeds are major constraints. The availability and cost of animal source ingredients such as fishmeal (FM), typically used in limited amounts to ensure balanced diets and high performance, is a global issue. Research has been condu...

It is well known that the majority of invasive aquatic species have been established in new habitats as a result of intentional importation for aquaculture or recreational purposes. This includes shrimp and other crustaceans. As a result of unexpected difficulties that arose from some of these importations, the International Council for Exploration of the Seas (ICES) proposed a set of precautio...