Effects of Temperature on the survival of Tigriopus californicus
Effects of Temperature on the survival of Tigriopus californicus
Tigriopus Californicus is from an area where its environment is under a constant fluctuation of variables. The salinity and temperature of its environment are often changing on a daily basis. Because of this T. californicus can often adapt well extremes in it environment. We chose to test the copepods ability to survive in extreme temperatures. This experiment is important to the development of knowledge of copepods due to temperatures vast influences on the development of health copepods. "Because temperature influences water column stability, nutrient enrichment, and the degree of new production, and thus the abundance, size composition, diversity, and trophic efficiency of zooplankton" (Richardson, 2008). During this procedure we hypothesize that male Copepods will be more likely to survive in higher and lower temperature extremes. This prediction is supported by the fact that in a previous study in the Journal of Plankton Research Male Copepods (Pseudocalanus newmani) developed at a faster rate at various temperatures than females. "Males developed into adults 2–6 days (depending on temperature) earlier than the females" (Hong-WU, 2003). In previous experiments many have documented the effects on reproduction that temperature causes on copepods, such as "under unlimited algal concentrations, mean (SE) EP increased with increasing T from 1.5 (±0.4) to 12 (±2.1) eggs female-1 day-1 from 2.6 to 16.6°C, respectively, and declined...
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...and have a longer life cycle than the female copepods, but we come to find out that that was incorrect from the data we collected. "Female copepods have an 86% living survival at 10 degrees Celsius and 14% at 20 degrees Celsius, and for males it is 43% at 10 degrees and 0% at 20 degrees" (Copepoda: Calanoida). This provides you with information that females survive better than males in mostly any temperatures. Sources of error that may have occurred in our experiment could have been over feeding or underfeeding since we switched to just checking them on Wednesdays, we also switched algae type in the middle of our experiment, and we could have just had them placed at temperatures that they did not care to be in. For future experiments of this hypothesis testing maybe check them at least twice a week and find a steady food supply for the copepods.
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