Jenny Zual - LAB-Hatching_Brine_Shrimp.pdf - LAB – Hatching Brine Shrimp Introduction Brine shrimp(​Artemia salina​ are small marine invertebrates

Jenny Zual - LAB-Hatching_Brine_Shrimp.pdf - LAB –...

This preview shows page 1 - 2 out of 4 pages.

LAB – Hatching Brine Shrimp Introduction Brine shrimp ( Artemia salina ) are small, marine invertebrates. They serve a critical role in marine and estuary (mix of salt and freshwater) ecosystems through their consumption of Dungliella algae. Without this population control, the algae would grow exponentially, consuming all of the oxygen in the water and threatening fish populations. Brine shrimp reproduce sexually, but do not give live birth. Due to the hazards of ocean life, the survival of the species depends upon massive production of offspring in the form of resistant cysts; hard, egg-like spheres that do not open until optimal conditions for survival are available. While most cysts never hatch, the number of cysts produced by female brine shrimp is exceedingly high. If optimal conditions are present, the cysts may hatch within 16-18 hours. The hatchlings, called naupili, are the first phase of the life cycle. At this point in their life, the naupili are capable of swimming and demonstrate positive phototaxis (i.e. response to light) due to their clearly visible eyespots. It is important to note that in any particular environment, the growth and survival of organisms depend on the physical conditions. In this lab investigation, we will determine which salinity (i.e. amount of salt, NaCl, dissolved in water) is optimal for the hatching of brine shrimp by means of a serial dilution. Our goal is to investigate this question using the process of science. Question ± What is the optimum level of salinity for hatching brine shrimp? Defining the Variables independent variable: percent of salinity dependent variable: number of brine shrimp that hatch controlled variables: the number of eggs in the petri dishes and the amount of each solution put in each petri dish.
Image of page 1

Subscribe to view the full document.

Image of page 2
  • Winter '18

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Ask Expert Tutors You can ask You can ask ( soon) You can ask (will expire )
Answers in as fast as 15 minutes