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The effect of temperature on the hatching success of brine shrimps Free essay! Download now

Home > A Level > Biology > The effect of temperature on the hatching success of brine shrimps

The effect of temperature on the hatching success of brine shrimps

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Downloads to date: N/A | Words: 2561 | Submitted: 28-Mar-2011
Spelling accuracy: 96.7% | Number of pages: 12 | Filetype: Word .doc


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The effect of temperature on the hatching success of brine shrimps essay previewThe effect of temperature on the hatching success of brine shrimps essay previewThe effect of temperature on the hatching success of brine shrimps essay preview

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The effect of temperature on the hatching success of brine shrimps. To investigate the effect of temperature on the hatching success of brine shrimps. To develop certain experimental skills, namely considering the ethical issue arising from the use of living organism.

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INTERNATIONAL EDUCATION CENTRE
(INTEC)

TITLE OF PRACTICAL:
The effect of temperature on the hatching success of brine shrimps

OBJECTIVE:
To investigate the effect of temperature on the hatching success of brine shrimps
To develop certain experimental skills, namely considering the ethical issue arising from the use of living organism.
INTRODUCTION:
In this experiment, the effect of temperature on the hatching success of brine shrimp is investigated. According to Wikipedia, Brine shrimp is the English name of the genus Artemia of aquatic crustaceans. Artemia, the only genus in the family Artemiidae, have evolved little since theTriassic period. The historical record of existence of Artemia dates back to 982, more than one thousand years ago, from Lake Urmia, Iran, while Schlösser was the first person to give drawings of Artemia in 1756. Artemia are found worldwide in inland saltwater lakes, but not in oceans. Artemia is a well known genus as one variety (sometimes identified as a new species Artemia salina x nyos), a cultivated subspecies of Artemia salina, is sold as a novelty gift, most often under the marketing name Sea-Monkeys.
Brine shrimp eggs are metabolically inactive and can remain in total stasis for two years while in dry oxygen-free conditions, even at temperatures below freezing. This characteristic is called cryptobiosis meaning "hidden life" (also called diapause). While in cryptobiosis, brine shrimp eggs can survive temperatures of liquid air (?190 °C, ?310 °F) and a small percentage can survive above boiling temperature (105 °C, 221 °F) for up to two hours. Once placed in brine (salt) water, the cyst-like eggs hatch within a few hours. The nauplii, or larvae, are less than 0.5 mm in length when they first hatch. Brine shrimp have a biological life cycle of one year, during which they grow to a mature length of around one centimeter on average. This short life span, along with other characteristics such as their ability to remain dormant for long periods, has made them invaluable in scientific research, including space experiments.
Just over a centimeter in size, the adult brine shrimp Artemia is an extremely wellknown animal because of its importance as a food source for fish and crustaceans raised in home aquariums, aquaculture systems, and in laboratories. One can buy brine shrimp at practically any pet display. It looks like a powdery brown substance but in reality the substance is thousands of cysts—eggs surrounded by protective cases. When added to water, these cysts will hatch into shrimp nauplii within a few hours.
Under magnification, the elongated shape and eleven pairs of limbs give this organism a ...

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