Where to deploy the probes?
As to what geographic areas and depths to target... I do not want to
specify exactly. The idea is to maximize the following parameters
listed in order of importance:
time deployed at any one location
This is the most important criteria. In order to make scientific sense
of the data it will be essential to have longterm time series at fixed
sites. So, when the individual wants to decide what trap to deploy his
or her probe(s), they should first target those traps they plan to occupy
for the longest. What is the maximum length of time a Maine Lobstermen
typically leaves a pot in the same place? I do not know what to expect.
If they tend to move ALL their traps on a regular basis then the only way
they could contribute to the science is to install the probes on a fixed
mooring some place regardless of whether they haul lobsters at that location.
I was hoping to get at least a few month time series at each location but
that might be too much to ask the inshore guys. The offshore crew provide
several months of information from a fixed trap location. That is ideal.
water depth of deployment
The deeper the probe, the better. Since we more interested in
long term changes, we want to stay away from shallow regions as much as
possible since the data there are cluttered with short term variability
due to local weather and outfalls. Both the physical and biological
scientist here in Woods Hole are interested in recording the surface temperature
(1 meter below the buoy) as well as the deep bottom temperature so most
lobstermen may be offered at least two probes for that purpose.
distance between probes
We are attempting to distribute probes with the maximum geographic
coverage. Ideally, we hope to spread a total of 60 probes along the entire
Maine coast so that no one harbor should have more than one set of probes..
If your buddy has a probe a few miles from yours, your data won't be giving
us much new information. If you have to be near your buddy,
put yours in a different depth zone.
Try not to deploy probes on strings that extend across multiple depths
(across a ravine, for example). The data from strings that cover a more
than 5 fathom per mile gradient can not be used since we would be averaging
haul counts from different ecological regimes.
(Notice the "likelyhood of recovery" is not listed as one of the
criteria above. Yes, we want to but the probes in areas that they
are relatively safe (>75%/year recovery rate) but it is not our
main concern. We expect to lose some probes. Participants should
not worry about losing a probe occasionally.)