6 19 2014. Oyster bay repro

Shelton WA

Mid 60s to high 70s

Participants: L. Christine savolainen and Jake heare

Followed the repro sop with insulation and ice blocks to control temp. Also collected all morts from all trays. Surprisingly, the dabob pop had no brooders while the south sound pop had 11 brooders.

Numbers as follow.

Temps in c
Pretreatment
Initial.            16
45 min.          18
1.5 hrs.          18

Treatment
Initial.            11
45 min.          11
1.5 hrs.          11
2.25 hrs.        10

Recovery
Initial.      16
45 min.     20
1.5 hrs.      16

Salinity
Pretreatment.       25
Treatment.            63
Recovery.              25

Brood collection

1H1-4
Brood.    0
Gaping.  70
Closed.    9
Dead.        7

1N5-8
Brood.     3
Gaping.   54
Dead.       8
Closed.      1

Brooders
#             size.              Sick
1.             29.                  W
2.             26.                  W
3.             30.                  W

1S13-16
Brooders       11
Gaping.          80
Dead.              12
Closed.           1

Brooders
#             size.               Sick
1.             27.                  W
2.             22.                  W
3.             26.                  W
4.             25.                  W
5.             26.                  W
6.             28.                  W
7.             31.                  W
8.             33.                  W
9.             22.                  W
10.           21.                  W
11.           29.                  W

Number 11 could not have its Brood collected because it was attached to the tray.

6 18 2014 Manchester Repro Check

Manchester, WA

Hi 50's to mid 60's, mostly cloudy until later in the day

Participants: L. Christine Savolainen and Jake Heare

Performed the Anesthesia SOP modified with insulators and ice blocks for the treatment tub. Found 1 brooder at Manchester. It seems no matter where they are, South Sound oysters just love to spawn. Also collected all mortalities from all trays checked. Failed to take a picture of the single brooder, I absent mindedly put the tray into recovery before taking the pic and then couldn't find the brooder when I did remember.

Numbers as Follow:

Temps in C

Pretreatment
Initial         7
45 min       8
1.5 hr        10

Treatment
Initial        8
45 min      8
1.5 hr       7
2.25 hr      7

Recovery
Initial         8
45 min       8
1.5 hr        10

Salinity in ppt
Pretreatment     30
Treatment         71
Recovery          30

Brood Collection

4H13-16
Brood      0
Gaping     63
Dead       4
Closed     12

4N13-16
Brood       0
Gaping     73
Dead        2
Closed      12

4S5-8
Brood      1
Gaping     55
Dead       10
Closed     28

Brooder
#           size       sick
1           19         w

Temperature Logger Readings from May to Mid June 2014

Last week I pulled temperature data from the logger pendants out in the field using the Shuttle. Everything performed stellarly and I have the temp graphs on the computer. I'll go by site for each temp graph.

Manchester, WA

From the temperature readings it appears that Manchester has stayed below the 12.5 C mark for most of the logging period. Only recently have temperatures crested the 12.5 mark and stayed that way for several days. It may be soon that the animals will begin spawning and brooding (or spawned within the last week or so). 

Oyster Bay, WA

From this data and the amount of brooders we have seen at Oyster Bay, its clear that temps have been above the 12.5 C mark  since early May. This again correlates with expectations and as temperatures steadily increase I believe we may see a slowing of reproduction due to stress demands. 

Fidalgo Bay, WA

Contrary to the observations in the field, it seems that Fidalgo bay has been much warmer since the beginning of June. Though it does look like in early May there was a warm period for several days. As of June 1st temperatures crested the 12.5 C mark and headed into spawning temps. We saw our first brooder approximately 6 days after that and saw a large number of brooders approximately 12 days after temps went above 12.5. Though temps have somewhat decreased recently I believe we will continue to see spawning across the board.

Overall I think that the populations are responding to temperature cues nicely, though it does seem that North sound respond quickly to temperature increases. The south sound animals seem to have nearly synchronous spawning during warm periods which would be of obvious benefit in South Sound where temps continue to increase and only stay within the spawning window for a short amount of time. The dabob animals seem to have reduced response to temperature cues and do not actively spawn unless temps are somewhat stable for a duration of time. 

6 13 2014. Fidalgo repro check

Anacortes wa

Mid 60s partly cloudy lite rain

Participants:  Sean Bennett and Jake Heare

Used the anesthesia sop with insulation on the treatment group. Temps stayed steady due to insulation and weather. Found multiple brooders in only one population. If you can guess which pop, you get a sticker.

Numbers as follow:

Temps in c

Pretreatment
Initial.         7
45 min.       7
1.5 hrs.       10

Treatment
Initial.          6
45 min.        6
1.5 hrs.         6
2.25 hrs.       6

Recovery
Initial.             7
45 min.           8
1.5 hrs.           9

Salinity in ppt
Pretreatment.     27
Treatment.           66
Recovery.             26

2N1-4
Brood.       0
Gaping.     68
Dead.         1
Closed.       27

2S13-16
Brood.     7
Gaping     83
Dead.       1
Closed.     3

Brooders
#           size.              Sick
1.            30.                W
2.             26.                W
3.             26.                W
4.              25.              W
5.              26.               W
6.              28.               W
7.              25.              W

2H5-8
Brood.         0
Gaping.       72
Dead.           0
Closed.        27

Lots of males with semen. Expect more brooders next week.

6 12 2014 oyster bay repro

Shelton wa

Mid 60s partly cloudy to rainy

Participants:  L. Christine savolainen  and Jake heare

Used anesthesia sop with insulation and semi frozen ice blocks. No change in Temps the entire time. Weather definitely helped. Found several more brooders. Some were below the 20 mm mark.

***Update*** I forgot to mention that I also jumped in the water today during lowtide and hunted underneath the docks to find the lost stack of trays. I was unable to find them. I used a 6 ft pole to feel underneath the lower parts of the dock as well as grab items I found. I pulled out half a dozen shell bags and 1 set of oyster growout cages. Our stacks are long gone. It might be possible to search further under the docks with a diver but I couldn't risk my safety going any further under the docks. At this point in time, its probably safe to assume that we will be unable to ever recover the missing trays. 

Numbers as follow:

Temps
Pretreatment
Initial.  15
45 min. 15
1.5 hrs.   15

Treatment
Initial.       13
45 min.      13
1.5 hrs.      13
2.25 hrs.     13

Recovery
Initial.        13
45 min.       13
1.5 hrs.        13

Salinity.
Pretreatment.        26
Treatment.              64
Recovery.               26

Brood collection
1S13-16
Brood.    3
Gaping.   63
Dead.       11
Closed.     6

Brooders.    
#          size.           Sick
1.            27.            W
2.            26.              W
3.            19.             W

1N5-8
Brood.      2
Gaping      48
Dead.        8
Closed.     1

Brooders
#               size.            Sick
1.                32.               Grey
2.                20.              W

1H1-4
Brood.         1
Gaping.       86
Dead.            8
Closed.         1

Brooders
#         size.          Sick
1.         19.             W

Many males with semen in all treatments.

6 11 2014 Manchester Repro

Manchester WA

Temps Mid 60's to High 70s
Sunny

Participants: Joelle Blais and Jake Heare

Used the Anesthesia SOP to check for brooding larvae. I modified this per Steven and Brent's suggestions to temperature control via adding ice blocks to the solution as well as insulate the tub with 2 inch styrofoam insulation with foil top and bottom. Much to my surprise not only did the insulation work, kept water within 1 degree of ambient with out ice blocks, it actually lowered the temps of the treatment when ice blocks were added (2 degrees below ambient). I believe this insulation and ice blocks method will be the way to go from here on out. Even on the warmest days I see it insulating the tubs very well.

Numbers as follow:

Temps in C

Pretreatment

Initial        9
45 min      15
1.5 hrs      19

Treatment

Initial     11
45 min   11
1.5 hrs    10
2.25 hrs   8

Recovery
Initial       11
45 mins    13
1.5 hrs     15


Salinity in ppt

Pretreatment      25
Treatment          65
Recovery           25


Brood Collection

4H1-4
Brood     0
Gapin      63
Dead       2
Closed     31

4S9-12
Brood       0
Gaping      49
Dead         12
Closed       37

4N9-12
Brood      0
Gaping     41
Dead        8
Closed     12

One male in the 4H group had sperm within its shell. I assume these animals are attempting to spawn though water temps seem to be below expectation.

6 6 2014 fidalgo repro check

Followed the anesthesia sop at fidalgo. Attempted to keep the treatment Temps around 11 c where the ambient water was. The direct sun had other plans. Will need way way way more gel bags. even then it might be more than can actually fit in the tub with the samples.

Also to my and hopefully everyone else's surprise. I found a Brooding oyster! If you can guess which population it came from before you look below, you are one smart cookie.

Numbers as follow

Temps
Pretreatment
Initial.      10
45 min.     15
1.5 hrs.      19

Treatment
Initial.         11
45 min.       16
1.5 hrs.        17
2.25 hrs.      19

Recovery
Initial     10
45 min.   15
1.5 hrs.    19

Salinity
Pretreatment.     20
Treatment.           63
Recovery.             21

Brood collection
2S9-12
Brood.      0
Gaping.    53
Dead.        1
Closed.      43

2H13-16
Brood.       0
Gaping.     58
Dead.         0
Closed.       33

2N5-8
Brood.      1
Gaping.    59
Dead.        2
Closed.      36

Brooders
#         size(mm).        Sick
1.          31.                     W

Lots of nukaluka in the water. Some may have been collected with brooding larvae. May muddy up counting.

Picture of brooders follows.