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Gr 11: How do Fraser River Temperatures Affect Salmon Catch Yields in…
Gr 11: How do Fraser River Temperatures Affect Salmon Catch Yields in British Columbia?
Abstract and Intro
Salmon is a thriving business in British Columbia
Populations have significantly declined
salmon industry could suffer
decline in populations is linked to the changes in the Fraser River temperatures
Avg water temp increase is around 2 degrees Celsius
There is a linked negative correlation between higher river temperatures and declining salmon yields
fewer than 700,000 salmon have returned in 2019-2020 compared to 50 million salmon historically
Methods and Results
Mean Temp
Figure one records the mean July to August temperature in the Fraser River
Figure 2
Records the Salmon Catch Yield from 2009 to 2024
Multilinear Regression
Figure 3 projects salmon population trends to 2050 using data from the other two figures
There is a clear declining trend in salmon catch yields
Overall trend of 2 degree Celsius water temperature rise
Over the past decade the salmon yield has definitely decreased due to a change in river temperature
Conclusion
It is concluded that increasing temperature is affecting salmon catch yield in British Columbia
There needs to be mitigation in river temperature changes for the sake of salmon
returning salmon population will decline if we don't do something
Mitigation strategies include changes in governmental policies
Discussion & Limitations
Temperature changes impair:
Migration timing
Smoltification
decreased reproductive success
Increased temperatures raise metabolic rates of salmon
rising temperatures also inhibit survival