The aims of the present study were to develop non-lethal methods to identify individual fish larvae and post-larvae before tagging and accurately follow their growth characteristics. European sea bass (Dicentrarchus labrax) was used as a model species at four different ages ranging from 71 to 100 days post fertilization (dpf).
The Aquaculture for Income and Nutrition (AIN) project implemented by World Fish and funded by USAID, aims at increasing aquaculture production in 20 districts of Southern Bangladesh (Greater Khulna, Greater Barisal, Greater Jessore and Greater Faridpur) to reduce poverty and enhance nutritional status. As part of its initial scoping activities World Fish commissioned this value chain assessment on the market chains of carp fish seed (spawn, fry and fingerlings) in the southern region of Bangladesh.
The results are presented of trials conducted whereby cassava peel and mango seed were fed to Nile tilapia (Oreochromis niloticus ) fingerlings. Findings indicate that these products may successfully be used as part of thediets of tilapia fingerlings, although further studies are required in order to determine the optimum proportions.
Local production of mixed sex Nile tilapia in irrigated rice fields has been introduced, established and then spread through farmer-to farmer contact in Northwest Bangladesh benefiting poor households in a number of ways. Food fish farmers have improved access to high quality seed at the time of peak demand early in the monsoon season. The seed producers benefit through small but strategic cash flows but also improved production of their fish for their own consumption, both as large fingerlings and fish after further grow on.
Sixteen 0.1-ha earthen ponds located at WorldFish Center, Abbassa, Egypt, were stocked with male sex-reversed Nile tilapia (Oreochromis niloticus) at a rate of 30,000 fish/ha. Two fish sizes were used in the experiment, young of the year (YOY) and overwintered fingerlings (OWF) averaging 0.4 and 6 g, respectively. Production and economics of both initial stocking sizes were evaluated. One growing period was compared with two growing periods in the season for both used fish sizes. Specific growth rate and average daily gain were calculated for all treatments.
Probiotic microbial feed supplements are gaining wide acceptance in livestock production, and may be applicable to aquaculture production systems. The present study was conducted to examine probiotic treatment in the fingerling diet of Nile tilapia Oreochromis niloticus (L.). A total of 240 of Nile tilapia fingerlings (weight ranged from 22.96 to 26.40 g) were divided into five experimental groups. The experiment was conducted for 120 days. Experimental diets were identical in all, except for the variation in probiotic levels.
The climate, land and water resources of Cameroon, combined with the high demand for fisheries products, makes this Central African country a high potential area for aquaculture. Fingerling availability and quality have been identified as key constraints which hold the sector back from rapid expansion. Nile tilapia (Oreochromis niloticus) and sharptooth catfish (Clarias gariepinus) are the two most widely cultured species and are often grown in polyculture. Some 32 government hatcheries have been built, but few are functional and none operates at full capacity.
This document is a report of a workshop on genetic resource management in sub-Saharan Africa.
With the recent availability of genetically improved Nile tilapia strain in the Philippines, it is important to look at the existing profile of tilapia hatchery operations in the country to help examine the potential strategies in the dissemination of the improved strain among hatchery operators. This paper attempts to analyze the socioeconomics and production efficiency status of tilapia hatcheries in the Philippines prior to the adoption of genetically improved Nile tilapia strain.
Two studies were conducted in consecutive years over the time period 14 January to 1 July to determine whether labor-savings and fish growth enhancement could be achieved by stocking Tilapia rendalli directly into ponds containing weeds left from a dry period. Six replicates 200 m super(2) ponds located at the Malawi National Aquaculture Centre, Domasi were drained, left dry for 63 days and natural growth of weeds was allowed. All ponds were stocked with 200 T. rendalli fingerlings (study 1) or adults (study 2) averaging 4.6 g (40 mm TL) and 47.7 (130 mm TL), respectively. For T.