Marine Aquaculture Development in Egypt
Italian Egyptian Debt SWAP Program
Technical Report
Marine Aquaculture Development in Egypt
Semi-intensive larval rearing, first trial
May15.2013, Alexandria, Egypt.
Introduction
Marine aquaculture is well developed in the Egyptian coastal lagoon ponds, where the stocking density is not very high, and where wild live food is available. The Italian cooperation group can put on the field the know-how for a Semi-intensive larval rearing technology, suitable for high quality fish having high survival rates in natural ponds. This technique was introduced in Italy for the restocking of coastal lagoons. Considering the issues above, the MADE project proposed to perform an experimental rearing trial in a large volume tank, in order to assess the suitability of this technique in the K21 hatchery.
In the K21 hatchery, the experimental production of sea bream has been tried in the outdoor concrete tank, generally used for the broodstocks. The tank has been modified according to the method to be adopted.
The aim was to assess whether the environmental conditions to perform this technology in the next season were viable, for the reproduction of mullet, sea bass and sea bream. The semi-intensive larval rearing method (SIM) is known to produce fingerlings with higher growth rate, low skeletal anomalies percentage, and high resistance to stress and disease, even if it needs large space to produce the same number of fish produced in a traditional intensive hatchery.
This method is also suitable for the production of new candidate species for aquaculture or for species whose larval rearing in intensive conditions is not yet fully successful. This method is based on simple concepts and a considerable know-how, to reproduce an environment similar to the wild one.
Contents
1 - Introduction
2 - The theory
3 - The K21 tank
4 - The larval rearing
5 - The results
6 - Conclusions
ساحة النقاش