Weekly seminar series
UMass Dartmouth's School for Marine Science & Technology hosts weekly seminars on topics related to research and policy development, fisheries, coastal preservation, ocean modeling, underwater robotics, climate change, and other related fields. The seminars are free and open to the public. Presentations are given by guest speakers and scientists -- many who collaborate with SMAST faculty, staff, and students on cooperative research projects. Supporters and potential collaborators in industry, federal and state agencies, and others are welcome to attend.
Mar27Department of Estuarine and Ocean Sciences - Dr. Charette
The School for Marine Science and Technology Department of Estuarine and Ocean Sciences Seminar Announcement "Boundary inputs of trace elements and isotopes into the oceans: lessons learned from a decade of radium isotope measurements during the GEOTRACES Program" Dr. Matthew Charette Senior Scientist Marine Chemistry & Geochemistry Woods Hole Oceanographic Institute Wednesday, March 27, 2019 12:30 pm to 1:30 pm SMAST East Rooms 101/102 836 S. Rodney French Blvd, New Bedford ******************************************************************************** To access the live broadcasting, go to https://echo360.org/directLogin and click on "Alternate login". You will have to login as "firstname.lastname@example.org" with the password: smastumassd. After login you will have to click on ALL CLASSES (MAR 700-01 - DEOS Seminar or MAR 700-02 - DFO Seminar) and click on the green LIVE streaming. To view a video of an SMAST seminar (post-October 1, 2014), go to https://www.umassd.edu/smast/events/seminar-series/ and click on a highlighted title. For additional information, please contact Sue Silva at email@example.com
Mar27Department of Fisheries Oceanography-Dr. Castro-Santos
The School for Marine Science and Technology Department of Fisheries Oceanography Seminar Announcement "The behavioral mechanics of connectivity: Understanding movement in a watery world" Dr. Theodore Castro-Santos Research Ecologist S.O. Conte Anadromous Fish Research Center of US Geological Survey-Ecosystems Wednesday, March 27, 2019 2:30 pm to 3:30 pm SMAST East Rooms 101/102 836 S. Rodney French Blvd, New Bedford Abstract: Human infrastructure tends to congregate near water, often leading to dramatic alterations in aquatic ecosystems. These effects can lead to fragmentation, both through the creation of impenetrable barriers, such as dams, and of pervasive, if partially permeable barriers such as road crossings. Humans have recognized and attempted to mitigate the environmental damage caused by these structures since Roman times. With respect to passage of riverine fishes, these mitigative measures continue to be frustratingly ineffective. The difficulty of developing effective passage solutions arises in large part from difficulties in measuring their performance. Although laboratory studies can provide useful information to help identify physiological limits to movement (e.g. swimming performance and energetics), ultimately it is the behavior of free-ranging fish that must inform appropriate design. Recent decades have seen important advances in our ability to monitor and measure movements of free-ranging animals. These are offering insights into the factors that contribute to connectivity, including novel insights into the role of diversity and life-history on the fitness of migratory species. ******************************************************************************** To access the live broadcasting, go to https://echo360.org/directLogin and click on "Alternate login". You will have to login as "firstname.lastname@example.org" with the password: smastumassd. After login you will have to click on ALL CLASSES (MAR 700-01 - DEOS Seminar or MAR 700-02 - DFO Seminar) and click on the green LIVE streaming. To view a video of an SMAST seminar (post-October 1, 2014), go to https://www.umassd.edu/smast/events/seminar-series/ and click on a highlighted title. For additional information, please contact Sue Silva at email@example.com.
Apr11Department of Fisheries Oceanography PhD Dissertation Defense-Chang Liu
The School for Marine Science and Technology Department of Fisheries Oceanography PhD Dissertation Defense "Geolocation Methods for Demersal Fish Species Using Archival Tagging Data" By Chang Liu Advisor: Dr. Geoffrey Cowles, School for Marine Science and Technology (SMAST) University of Massachusetts Dartmouth Committee Members: Steve Cadrin, SMAST, University of Massachusetts Dartmouth Gavin Fay, SMAST, University of Massachusetts Dartmouth Arnault Le Bris, Memorial University of Newfoundland Canada Thursday, April 11, 2019 2:30 pm SMAST East, Rooms 101/102 836 S. Rodney French Blvd New Bedford, MA Abstract: Most marine fish are migratory and some species exhibit complex movement patterns. Knowledge of fish movement can improve the understanding of interactions between populations and discreteness of stocks which has implications on stock identification, assessment, and management. Geolocation is increasingly employed to reconstruct the movements of fishes using data retrieved from electronic archival tags, however, such methods often require significant modification to be applied to new regions, species, or tag types due to variability in oceanographic conditions, fish behavior, and data resolution. Existing geolocation methods also commonly suffer from limitations such as low horizontal resolution of locations, flawed land boundary treatment, and extensive computation time. To address these issues, a geolocation method that builds upon an existing hidden Markov model (HMM) framework, and a state-space geolocation approach based on the particle filter (PF) were developed. Both frameworks contain a likelihood model which compares tag-recorded environmental data (depth, temperature, tidal characteristics) with quantities derived from an oceanographic model and a behavior model which constrains the horizontal movement of the fish. Validation exercises using stationary mooring tags and double-electronic-tagged Atlantic cod resulted in <10 km median errors of the estimated tracks. Acceleration of the PF method using graphics processing units (GPUs) resulted in significantly decreased wallclock time compared with the single threaded CPU (central processing unit) implementation, enabling rapid geolocation using consumer grade computer hardware. The HMM method was applied to a geolocation study of Atlantic halibut, a "Species of Concern" in U.S. waters. Halibut were tagged off Massachusetts and Maine, U.S. using both pop-up satellite and fixed data storage tags. A preprocessing routine was implemented to address the data limitations of the satellite transmitted data. Based on a limited number of individuals, several with short deployments, the geolocation results indicate that most tagged halibut stayed in the vicinity of the tagging locations (<60 km), while some underwent long horizontal displacements up to 440 km. Estimated movement tracks of two individuals may suggest that they reached likely spawning habitat. The results suggest finer-scale spatial population patterns of Atlantic halibut, and provide information on vertical and horizontal movement behavior that can inform stock assessment and management decisions. For additional information please contact Sue Silva at firstname.lastname@example.org
Time and location
DFO seminars are held on Wednesdays at 3:30 pm in Room 157 of SMAST-Fairhaven (AT&T Building). DFO seminars are also simulcast to Room 204, SMAST-New Bedford. Contact Prof. Gavin Fay at email@example.com for information.
Access seminars remotely
If you are unable to attend the seminars, you may remotely view the seminar in progress. To access the live broadcast,
- visit Echo360 and click “Alternate login.”
- login as firstname.lastname@example.org with the password smastumassd.
- click ALL CLASSES (MAR 700 - 01 - DEOS Seminar or MAR 700 - 02 - DFO Seminar).
- click the green LIVE streaming.
Download the archive of seminar series (PDF) (and associated videos where applicable).