I do not have an update for my crab project this week, but I did go fish seining with my aquatics lab. Our goal within this lab was to see which area had a higher biodiversity between our two points. Our process was measuring out an area for the seining net, then timing how long it took to pull the net from point A to point B. By performing this we were able to quickly identify and count the different fish and crabs we caught. Seeing the crabs have helped me identify one species that I can take into consideration for my project.
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| Site 1 |
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| Site 2 |
Additionally, we performed water quality testing, which will aid me when I test my two crabbing locations in the near future. To begin taking water quality samples, we used an instrument called a YSI meter. An YSI meter can take several different reading of the water including; salinity, temperature, dissolved oxygen, and so on. For our lab we only focused on the three I have highlighted.
Also, we took a pH sample of the water, which is done by taking your sampling cup and filling it with water, closing the cap, shaking, then dumping it away from where you are currently sampling, then again gather a sample. The reason you must shake the sample the first time is because that makes sure everything in that cup is your sample now.
The results for the two sites are as follows;
Site 1:
Salinity: 30.5 parts per thousands (ppt).
Dissolved oxygen: 7.30 milligrams per liter (Mg/L).
Temperature: 18.4 degrees Celsius.
pH: 6.87
Site 2:
Salinity: 33.1 (ppt).
Dissolved oxygen: 7.54 (Mg/L).
Temperature: 18.4 degrees Celsius.
pH: 6.4
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