HELP ON ECOLOGY LAB REPORT PLEASE!!! - The AIM of this lab exercise: Does Easter
ID: 3074188 • Letter: H
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HELP ON ECOLOGY LAB REPORT PLEASE!!!
- The AIM of this lab exercise: Does Eastern Mosquitofish (Gambusia holbrooki) population structure differ with season?
- You will compare population structure in an FIU pond from February 2018 (previous semester) with the data that you collect this semester (September 2018).
--> You should interpret what the net reproductive rate (R0), the mean generation time (G), the intrinsic population growth rate (r), and the optimal age for sexual maturity tells us about mosquitofish populations. (Hint: This part is a good place for references!)
--> Discuss the similarities and/or differences between the Gambusia population that you sampled and the other two populations. What might cause these similarities and differences? Discuss and providebiological explanations (interpretations).
--> Provide future directions based on YOUR results from THIS experiment.
--> Discuss the importance of your results. (Hint: This part is a good place for references!)
FEBRUARY 2018 CURRENT RESULTS
Age Weighted Fecundity 1(x)*b(x)*x
14.673 Offspring
0.024 Ind/ Days
Optimal Age for Sexual Maturity
SEPTEMBER 2018 RESULTS:
Age Class (days)x Sample/ Age
s(x) Number/ Age
n(x) Survival Rate
1(x) Fecundity b(x) Offspring/Ind 1(x)*b(x)
Age Weighted Fecundity 1(x)*b(x)*x
0 24 120 1 0 0 0 30 39 96 0.8 0 0 0 60 19 57 0.475 0 0 0 90 21 38 0.317 24 7.608 684.72 120 8 17 0.142 27 3.834 460.08 150 5 9 0.075 29 2.175 326.25 180 2 4 0.033 32 1.056 190.08 210 0 2 0.017 0 0 0 240 1 2 0.017 0 0 0 Sum 120 R014.673 Offspring
G 113.209 Days r0.024 Ind/ Days
Optimal Age for Sexual Maturity
120 DaysExplanation / Answer
Hypothesis-The reproduction in gambusia increases in september and the reproduction rate and the number of organisms decreases with increase in age group irrespective of the month.
Major results-It can be seen that in september both the number of organisms and their reproduction rate increases when compared to february.
The survival rate,age weighted fecundity and the net offsprings per individual also increases.
The R0 increases to about 4 times in september.
The average life span and the intrinsic rate of natural increase that is 'r' also increases.But the optimal age of sexual maturity continues to be the same that is 120 days.
This indicates that the climate in september is favourable for gambusia.
Yes these populations differ in the r,G and R0 values but not in the age of maturity.The age of maturity remains the same.
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