Below are some informative graphs and charts to help understand the differences found between populations at each site and the overall differences between sites.
Mortality numbers were generated by collecting most if not all dead oysters at each site and counted later at the lab. There were also some additional deceased oysters that were accidentally collected with the live samples. And for Dabob Bay, additional mortalities were collected on the return trip and added to the original mortality numbers for Dabob.
 |
| All Mortality Data Combined |
 |
| Mortality data for each population at each site |
For easier visualization here is the percent mortality:
 |
| Percent Mortality |
Here is a table of the raw data for those interested.
Site
|
Manchester
|
|
Fidalgo
|
|
|
Oyster Bay
|
|
|
Dabob
|
|
|
Population
|
NF
|
HL
|
SN
|
NF
|
HL
|
SN
|
NF
|
HL
|
SN
|
NF
|
HL
|
SN
|
Pop Mort.
|
1
|
1
|
11
|
18
|
20
|
15
|
47
|
49
|
51
|
229
|
112
|
180
|
Pop Perc. Mort.
|
0.21
|
0.21
|
2.29
|
3.75
|
4.17
|
3.13
|
9.79
|
10.21
|
10.63
|
47.71
|
23.33
|
37.50
|
Total Mort.
|
13
|
|
|
53
|
|
|
147
|
|
|
521
|
|
|
Percent Mort.
|
0.90
|
|
|
3.68
|
|
|
10.21
|
|
|
36.18
|
|
|
Live Counts were completed at each site on sampling day. All live oysters were counted for each tray except at Dabob where only 1/4th of the total number of live oysters were counted in each tray. The total live counts per population are calculated by adding the live counts from all 4 trays per population were added together. For Dabob, this number was then multiplied by 4 to estimate the total live count for each population at Dabob.
 |
| *Estimated |
 |
| *Estimated |
A raw data table.
|
Manchester
|
|
Dabob*
|
|
|
Fidalgo
|
|
|
Oyster Bay
|
|
|
NF
|
HL
|
SN
|
NF
|
HL
|
SN
|
NF
|
HL
|
SN
|
NF
|
HL
|
SN
|
Total
|
391
|
405
|
421
|
188
|
228
|
216
|
447
|
410
|
402
|
433
|
411
|
396
|
Percent Survival
|
81.45833
|
84.375
|
87.70833
|
39.16667
|
47.5
|
45
|
93.125
|
85.41667
|
83.75
|
90.20833
|
85.625
|
82.5
|
Site Total Survival
|
1217
|
|
|
632
|
|
|
1259
|
|
|
1240
|
|
|
Site Percent Survival
|
84.51389
|
|
|
43.88889
|
|
|
87.43056
|
|
|
86.11111
|
|
|
At each site 8 live samples were collected from each tray culminating with roughly 32 samples per population. At Dabob 16 samples were taken per tray which theoretically created 64 samples were population, actual population samples ranged from 43 to 59. Below are the average sizes and weights for each population at each site and average size and weight at each site.
 |
| Calculated from all LIVE samples excluding any previously dead animals |
 |
| Size reflects length between the two most distant points on the each animals shell. |
 |
| Weight taken in shell after cleaning |
 |
| Weight includes shell |
Final Raw Data Table
Pop (n) is the number of samples collected from each population at each site.
Site
|
Manchester
|
|
|
Fidalgo
|
|
|
Oyster Bay
|
|
|
Dabob
|
|
|
Population
|
NF
|
HL
|
SN
|
NF
|
HL
|
SN
|
NF
|
HL
|
SN
|
NF
|
HL
|
SN
|
Average Size per pop
|
15.38709677
|
14.53125
|
13.84375
|
20.6875
|
16.5625
|
20.59375
|
22.8
|
20.875
|
23.28125
|
17.4186
|
12.71186
|
14.96
|
Average size at site
|
14.57894737
|
|
|
19.28125
|
|
|
22.308511
|
|
|
14.33987
|
|
|
Average Weight per Pop
|
0.486129032
|
0.381563
|
0.392188
|
1.145313
|
0.617188
|
1.075625
|
1.4676667
|
1.109063
|
1.451875
|
0.48
|
0.211186
|
0.3028
|
Average weight at Site
|
0.419263158
|
|
|
0.946042
|
|
|
1.3467021
|
|
|
0.315294
|
|
|
Site (N)
|
95
|
|
|
96
|
|
|
94
|
|
|
152
|
|
|
Pop (n)
|
31
|
32
|
32
|
32
|
32
|
32
|
30
|
32
|
32
|
43
|
59
|
50
|
Dabob Population Summary Pie Charts
 |
| Live and Sampled combined equal Total Live on Sampling Day |
Here is the Base Live 25% Count from the Windscreen bags summed to create a total live at each site. Then compared to the estimated remaining live from the percentage survival based on the number of actual live animals when attempting to collect 64 animals from each pop.
 |
| These are the exact numbers from each population compared to estimated remaining living. |
Population
|
NF
|
|
|
|
Total
|
AVG
|
Population
|
HL
|
|
|
|
Total
|
AVG
|
Population
|
SN
|
|
|
|
Total
|
AVG
|
Tray
|
3N1
|
3N8
|
3N10
|
3N13
|
|
|
Tray
|
3H2
|
3H5
|
3H11
|
3H14
|
|
|
Tray
|
3S4
|
3S7
|
3S10
|
3S15
|
|
|
Live
|
11
|
17
|
11
|
8
|
188
|
47
|
Live
|
2
|
20
|
22
|
13
|
228
|
57
|
Live
|
19
|
12
|
4
|
19
|
216
|
54
|
Live Samples NF = 43 HL = 59 SN = 50