Baywater 10K Seed Outplant Survival

I did a quick assessment of survival of 10K seed from our assessments yesterday. Here are the results.

Overview

In October 2024, we outplanted 10K seed at Baywater Shellfish in Thorndyke Bay, WA. Data for this project can be found on GitHub.

We exposed oysters to hardening treatments including:

  • low salinity exposure (FW)
  • high temperature exposure (35C)
  • low salinity + high temperature exposure (FW 35C)
  • polyIC exposure (immune)
  • control

Survival

Survival was highly variable and <75% for all bags. There was a trend for lower survival in the immune group (p=0.07), but this is not significant.

Here is the full data:

purple.tag tag.20250820 source.bag treatment starting.oysters alive.20250820 notes
1 400 75 FW 35C 150 78  
2 328 75 FW 35C 150 88  
3 304 75 FW 35C 150 46  
4 301 76 FW 35C 150 78  
5 306 76 FW 35C 150 67  
6 318 76 FW 35C 150 94  
7 311 47 35C 150 69  
8 309 47 35C 150 52  
9 316 47 35C 150 101  
10 315 30 35C 150 22  
11 319 30 35C 150 47  
12 317 30 35C 150 83  
13 NA 49 Immune 150 7  
14 305 49 Immune 150 38  
15 302 49 Immune 150 7  
16 NA 50 Immune 150 4  
17 NA 50 Immune 150 0  
18 303 50 Immune 150 49  
19 NA 66 FW 150 6  
20 312 66 FW 150 113  
21 NA 66 FW 150 6  
22 307 56 FW 150 79  
23 308 56 FW 150 71  
24 314 56 FW 150 86  
25 NA 37 Control 150 NA bag was open
26 329 37 Control 150 102  
27 310 37 Control 150 19  
28 313 36 Control 150 98  
29 320 36 Control 150 86  
30 330 36 Control 150 18  
Written on August 21, 2025