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Investigating The Salinity Tolerance Of The Swordtail (Xiphophorus Hellerii), Alexandra Megan Krak
Investigating The Salinity Tolerance Of The Swordtail (Xiphophorus Hellerii), Alexandra Megan Krak
College of Science and Health Theses and Dissertations
The swordtail, Xiphophorus hellerii, is a freshwater fish species native to Mexico and Central America and is commonly used in the tropical aquarium trade. Swordtails have been shown to have limited survival in 6 ‰ salinity (Nanda et al., 2016), suggesting they may have a greater salinity tolerance than previously expected. Using a gradual acclimation method, we examined the salinity tolerance and swim performance of this species. Freshwater-reared female swordtails were housed in 29-gallon aquaria. A control group was held in freshwater throughout the experiment. For the experimental group, the salinity was increased by 2 ‰ every week until 30 …