eMOLT Phase III: Data Management
 DRAFT proposal to NEC
last updated: 8 Mar 2002 0910
(Expecting to change very  little over the next week. Due in the mail on ~15 March )

Bascunan, C.,  M.H. Taylor, J.P. Manning, J.P.  2002. Description of 2001 Oceanographic Conditions on the Northeast Continental Shelf. NEFSC Ref.Doc.. in prep.
Bisagni,J.J., R.CBeardsley, C.M.Rusham, J.P.Manning, and W.J.Williams, 1996, Historical and recent evidence of Scotian Shelf Water on southern Georges Bank, Deep Sea ResII (7-8):1439-1472.
Boudreau, B., Y. Simard, E. Bourget, E. 1991, Behavioral responses of the planktonic stages of the American lobster Homarus americanus to thermal gradients, and ecological implications. Mar.Ecol. Prog. Ser. 76, 13-23.
Bumpus, D.F., 1957, Surface Water Temperatures Along Atlantic and Gulf Coasts of the United States, US Fish and Wildlife Service, Special Scientific Report-Fisheries No. 214.  153 pages.
Chen, C., R. C. Beardsley, and P. J. S. Franks, 2001. A 3-D prognostic model study of the ecosystem over Georges Bank and adjacent coastal regions. Part I: physical model. Deep Sea Research, 48, 419-456.
Cobb, et al., 1989, Speed and direction of swimming postlarvae of the American lobster, Trans. Am. Fish. Soc., 118, 82-86.
Colton, J.B. and Ruth R. Stoddard, 1973, Bottom-Water Temperatures on the Continental Shelf, Nova Scotia to New Jersey, NOAA Tech. Rep. CIRC-376. pp 1-55.
Cooper, R.A. and J. R. Uzmann, 1980, Ecology of juvenile and adult Homarus. In "The Biology and Management of Lobsters" (J.S.Cobb and B.F.Phillips,eds.) Vol. 2, pp.97-142. Academic Press., NY.
Cooper, R.A. and J. R. Uzmann, 1971, Science, 171, 288-290.
Factor, J.R., 1995, Biology of the Lobster, Homarus americanus. Academic Press. New York.
Fogarty, M.J. and R. Lawton, 1983, An overview of larval American lobster, Homarus americanus, sampling programs in New England during 1974-79. NOAA Tech. Rep.,mNMFS SSRF 775, 9-14.
Harding,G.C., K.F. Drinkwater, and W.P. Vass. 1983. Factors influencing the size of American lobster (Homarus americanus) stocks along the Atlantic coast of Nova Scotia, Gulf of St. Lawrence, and Gulf of Maine: A new synthesis. Can J.Fish. Aquatic. Sci., 40, 168-184.
Harding, G.C. 1992. American Lobster (Homarus americanus Milne Edwards): a discussion paper on their environmental requirements and the known anthropogenic effects on their populations. Can J. Fish. Aquatic. Sci.,1887.
Herrick, F.H. 1895, The American Lobster: A study of its habits and development. Bull. U.S.Fish Comm. 15, 1-252 + 54 plates.
Incze, L.S. and C.E.Naimie, 2000. Modelling the transport of lobster (Homarus americanus) larvae and postlarvae in the Gulf of Maine. Fish. Oceanog. 9:99-113.
Katz,C.H., Cobb, J.S., and Spaulding, M., 1994. Larval behavior, hydrodynamic transport, and potential offshore-to-onshore recruitment in the American lobster Homarus americanus. Mar.Ecol. Prog. Ser. 103:265-273.
Lynch,D.R., M. J. Holboke, C. E. Naimie. 1997, The Maine Coastal Current Spring Climatological Circulation. 1997, Cont. Shelf Research. 17(6):605-634.
MacKenzie, B.R., 1988, Assessment of temperature effects on interrelationships between stage duration, mortality, and growth of laboratory -reared Homarus americanus. Miln Edwards larvae.J. Exp. Mar.Biol. Ecol., 116, 87-98.
Manning, J.P., 1991, Middles Atlantic Bight Salinity: interannual variability, Cont. Shf. Res. 11(2):123-137.
Manning,J.P., L.Y. Oey, D. Packer, J. Vitaliano, T.W. Finneran, K.W.You, and S. Fromm, 1994, Observations of Bottom Currents and Estimates of Resuspended Sediment Transport at the New York Bight 12-mile Dumpsite,
Manning, J.P. and R. Beardsley, 1996, Assessment of Georges Bank Recirculation from Eulerian Current Observations in the Great South Channel, Deep Sea ResII, Vol. 43(7-8):1575-1600.
Manning, J.P., 1996, Oceanographic Conditions of Georges Bank Spawning Grounds: 1992-1994, NAFO Scientific Council Series Doc. No. 24, p.125-141.
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Marine Populations: Physical-Biological Interactions Vol.58(5) 985-993.
Mountain, D.G. and P.F. Jessen, 1987, Bottom waters of the Gulf of Maine, 1978-1983, Jour. of Mar. Res., 45:319-345.
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Schlitz, R., J.P. Manning, and K.W. Smith, 2001, Structure and transport of Alongshelf currents across the Southern Flank of Georges Bank during late summer 1982. DSRII, 48(1-3):341-372.
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The statistics on the eMOLT project to date is best presented in the form of Table 1.
Total number of individuals involved 104
Total number of individuals who have deployed probes 65
Total number of individuals who have returned data to date 43
Total number of documented  temperature sites 83
Total number of documented salinity sites 5
Number of  Atlantic Offshore Participants 16
Number of  Massachusetts Participants 27
Number of  Maine Participants 21
Number of Downeast Participants 8
Total Number of Temperature Observations 531495
Average Temperature Record Length in Months 8.9
Total Number of Salinity Observations 32980
Average Salinity Record Length in Months 9.1

Probes are widely distributed around the Gulf of Maine (Figure A1a) and  in time over the last several months (Figure A1b) locations.  Most of the time series are several months long with many of the records documenting significant events that resulted in temperature variations of several degrees.  The five salinity probes deployed thus far are geographically separated from each other and from those of GOMOOS.  We have coordinated are efforts with the GOMOOS operation and intend to develop that relationship continually (Figure A2).


Ever since the onset of this project, the eMOLT results have been posted on the web.  We now have a registered domain name of  "emolt.org".   On entering this site, users are presented with a variety of links.  The "results from the field" link, for example, presents a map of the Gulf of Maine.  By clicking on small dots representing  individuals by homeport, links to a set of plots are listed.  The user can then view either detailed plots of  actual time series or  filtered summary  plots of the temperature time series for that particular site.  In the case of the summary plots, a  climatological seasonal cycle and  its standard deviation (based of  past NOAA-collected CTD data) is often plotted as a background reference.  In this way, users can  tell how current temperature relates to historical conditions.  While nearly all the eMOLT sites have only one year of data thus far, there are a few sites that have been occuppied for multiple year so that interannaul comparisons are possible. Marc Palombo, for example,  has occupied site "TA15" for nearly two years and can see, after taking a 30-day running average of the highly variable record at that location, the two years are nearly the same. Most of the effort on the part of the scientific party is these types of plots in a user friendly environment..  The longterm objective is to develop interactive mapping routines so that users can zoom in and view data.

While catch data is available for some of these sites on a near-weekly basis, they are, of course, not presented on publicly available web sites.  Plots of catch records are made for individual lobstermen and the data is discussed privately off-line.

The results of the eMOLT first year of sampling has been presented in a series of forums over the last several months.  The project was presented at the UMASS Dartmouth's Physics Department's weekly seminar in November 2001,  at the Northeast Fisheries Science Center  Tri-Annual Symposium (Westport, Ct) in December 2001,  at the Massachusetts Lobstermen's Annual  Weekend (Falmouth, Ma) in January 2002,  and at the Maine Fishermens Forum (Rockland, Me) in March 2002.  Much of these presentations included an analysis of the historical data collected prior to the eMOLT project.  Because of a recently scheduled cruise in early April and a presentation of eMOLT results on April 19th at the Marine Institute in Dublin, Ireland, the abstract to the National Shellfish Meeting  (14-18 April) in Mystic, Ct. will be withdrawn.

Calibration and comparison of the various probes was conducted in a series of control experiments in the past year few years.  Multiple probes from various manufacturers (VEMCO, ONSET, YSI, and SEABIRD) were deployed together either in a tank at the NEFSC Aquarium or off the dock in Woods Hole Harbor in order to validate the relative response of all the thermistors.  The results of these test with complete details and plots are posted on the eMOLT web site under "Administrators Manual". Biases between probes were often more than twice the value specified by the manufacturer.  As a consequence of this result,  we contracted the ONSET corporation to engineer a probe specifically for our needs. The new probe designed specifically for eMOLT applications, delivered in March 2001, has a temperature range of 0-20 degC and a 0.09 degC accuracy.   Since the variability of interest are often less than 1 degC, it is essential that eMOLT continue to carefully monitor the performance of these probes.  As part of our routine procedure at the end of each sampling season,  probes are gathered, deployed together in controlled environments, and tested for biases and sensor drift.  In the case of salinity probes, water samples will be  taken on a near-monthly basis as a calibration check.  A total of 43 Niskin samples have been taken thus far.

For further information contact: James.Manning@noaa.gov

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