Tilapia Case Study

Tilapia has a number of characteristics that make them attractive to culture them. For example, they can tolerate the crowding and handling that is required in tank-based facility. Tilapia have heavy slime coat that protects them from abrasion and bacterial infections that would adversely affect other many fish. Furthermore, Tilapia also shows amazingly tolerant of poor or variable water quality (Dennis et al., 2009)

Water quality requirements

Water quality parameter is the most important that needs to be considered in culturing Tilapia and also other fish. If poor water quality the growth of the fish will retard and will shows the low production. That why it need effort to always monitor them.

Temperature

Growth optimum for Tilapia culture
Carbon dioxide (〖CO〗_2)
For culturing Tilapia, always maintain at less than 40 mg/L. Elevated carbon dioxide levels will cause lethargic behavior or slow feeding response in fish.

CHAPTER 3

METHODOLOGY

Microalgae sample collection, culture and maintenance

Nannochloropsis sp. obtained from Hatchery School of Fisheries and Aquaculture Sciences, UMT. The pure of Nannochloropsis sp. was culture as a batch culture with small scale containing aquaculture wastewater as culture medium in the culture room. The culture will be observed until it can be transfer into the larger culture. The culture also will provide aeration and will monitor in daily. The sub culturing is done in every two weeks in order to maintain healthy and in good stocks. Then the stock culture will be used during culture experiment.

Experimental design

The Nannochloropsis sp. will grow in wastewater. The culture media were prepared in five replicates. The growth of Nannochloropsis sp. will be evaluated.

Data analysis

The growth performance of tilapia was determined according to the following
Larvae tilapia will be transferred into the aquarium with 12L of freshwater and the aeration will provide. The cultured of tilapia then will be feed with the Nannochloropsis sp. The growth of larvae tilapia will be measure on their length and weight. To take their length and weight of larvae tilapia, we must take the larvae and formalin then dry it. After that, take their length and weight. In fish, the larvae stage generally consists of the period of rapid growth, which can vary substantially in duration within and among species (Sinclair and Tremblay, 1985). The observation and data analysis will be recorded every day until the larvae tilapia reach into the stage