Title of Experiment
The Effect of Temperature on the Hatching Success of Brine Shrimps Abstract
An experiment is carried out to study whether temperature is a determining factor for the hatching of brine shrimp eggs. In this experiment, the brine shrimp eggs are allowed to hatch in two different temperatures. This is done by incubating the boiling tubes filled with 30 mL de-chlorinated 2% saline water and 40 brine shrimp egg cysts in two different temperature, namely room temperature (25°C) and 35°C. Each of the treatments is duplicated so that a more accurate result can be obtained. All the boiling tubes are left for the period of one day. The number of successfully hatched brine shrimp eggs is calculated with the aid of a stereomicroscope after one day. The results are tabulated in a table and used to calculate the percentages of hatching success of brine shrimps. A relationship between temperature and the hatching success of brine shrimps are determined from the analysis and interpretation of the outcome of the experiment.
Brine shrimps have a relatively simple life cycle. They reproduce by two ways, namely mating between male and female, or parthogenesis. In the process of parthogenesis, the female brine shrimps are able to produce eggs without the presence of a male. The eggs produced are encapsulated and they are dormant. Being dormant means that the egg cysts can withstand harsh conditions for many years and they will hatch when the conditions are favourable. About 18 to 24 hours after the hatching starts, nauplii are produced. Nauplii start to shed their exoskeleton around 12 hours later. They will continue to shed their exoskeleton several times before they finally become adult brine shrimps. In order for the brine shrimp egg cysts to hatch, the conditions have to be at optimum level. An important factor is the salinity. Approximately one tablespoon of salt per litre of water is needed for the hatching of the eggs. If the salinity of water if too...
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