Department of Fisheries Oceanography PhD Proposal Defense by Christopher Rillahan
When: Friday,
April 29, 2022
1:00 PM
-
2:00 PM
Where: > See description for location
Description: The School for Marine Science and Technology
Department of Fisheries Oceanography
PhD Proposal Defense Announcement
"Application of optical and acoustic technologies to improve the understanding of fish behavior, ecology, and stock assessments"
By
Christopher Rillahan
Advisor
Pingguo He, School for Marine Science and Technology (SMAST)
University of Massachusetts Dartmouth
Committee Members
Dr. Steven Cadrin, SMAST, University of Massachusetts Dartmouth
Dr. Kevin Stokesbury, SMAST, University of Massachusetts Dartmouth
Dr. Theodore Castro-Santos, U.S. Geological Survey, S.O. Conte Anadromous Fish Research Laboratory
Dr. Kresimir Williams, National Marine Fisheries Service, Alaska Fisheries Science Center
Friday, April 29, 2022
1:00 pm to 2:00 pm
SMAST East, Rooms 102/103
836 S. Rodney French Blvd, New Bedford, MA
Abstract:
The development of underwater optical and acoustic technology has evolved rapidly throughout the 20th century. However due to a lack of data, scientific surveys and stock assessment models have traditionally relied on simplified assumptions of fish behavior. While there is a general understanding that fish have well developed sensory systems, mobile capacity and complex life histories, the lack of information often precludes its use in assumptions of gear catchability, survey design, and spatial and temporal population dynamics. The advancement and incorporation of observational technology allows fisheries researchers to improve our understanding of fish behavior. The results can be seen in the development of enhanced fishing technology, improved assumptions of survey gear catchability and novel survey methodologies. This dissertation focuses on the application of novel technologies to improve our understanding of fish behavior and ecology, with the goal of improving monitoring and management.
The dissertation includes the development of survey technology to study the distribution of structure-oriented black sea bass in southern Massachusetts
using stereoscopic underwater video systems. This research is in response to concerns that the current regional survey methodologies do not adequately
sample all fish populations. Similarly, several recent studies indicate that our understanding of river herring migration may be biased by existing sampling
techniques. A high-resolution acoustic imaging was thus used to study the migratory behavior of anadromous river herring during their spring spawning run
to provide insight into river herring migratory behavior and the effect of environmental variables on movement. The behavioral data will then be used to
investigate the bias and precision of current sampling methodologies, thereby improving the estimates of run size in river herring. Finally, the use of high-resolution acoustics to study the impacts anthropogenic structures on migratory fish movement will also be reported and included in the dissertation.
********************************************************************************
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Meeting ID: 956 5502 3555
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********************************************************************************
For additional information, please contact Sue Silva at s1silva@umassd.edu
Department of Fisheries Oceanography
PhD Proposal Defense Announcement
"Application of optical and acoustic technologies to improve the understanding of fish behavior, ecology, and stock assessments"
By
Christopher Rillahan
Advisor
Pingguo He, School for Marine Science and Technology (SMAST)
University of Massachusetts Dartmouth
Committee Members
Dr. Steven Cadrin, SMAST, University of Massachusetts Dartmouth
Dr. Kevin Stokesbury, SMAST, University of Massachusetts Dartmouth
Dr. Theodore Castro-Santos, U.S. Geological Survey, S.O. Conte Anadromous Fish Research Laboratory
Dr. Kresimir Williams, National Marine Fisheries Service, Alaska Fisheries Science Center
Friday, April 29, 2022
1:00 pm to 2:00 pm
SMAST East, Rooms 102/103
836 S. Rodney French Blvd, New Bedford, MA
Abstract:
The development of underwater optical and acoustic technology has evolved rapidly throughout the 20th century. However due to a lack of data, scientific surveys and stock assessment models have traditionally relied on simplified assumptions of fish behavior. While there is a general understanding that fish have well developed sensory systems, mobile capacity and complex life histories, the lack of information often precludes its use in assumptions of gear catchability, survey design, and spatial and temporal population dynamics. The advancement and incorporation of observational technology allows fisheries researchers to improve our understanding of fish behavior. The results can be seen in the development of enhanced fishing technology, improved assumptions of survey gear catchability and novel survey methodologies. This dissertation focuses on the application of novel technologies to improve our understanding of fish behavior and ecology, with the goal of improving monitoring and management.
The dissertation includes the development of survey technology to study the distribution of structure-oriented black sea bass in southern Massachusetts
using stereoscopic underwater video systems. This research is in response to concerns that the current regional survey methodologies do not adequately
sample all fish populations. Similarly, several recent studies indicate that our understanding of river herring migration may be biased by existing sampling
techniques. A high-resolution acoustic imaging was thus used to study the migratory behavior of anadromous river herring during their spring spawning run
to provide insight into river herring migratory behavior and the effect of environmental variables on movement. The behavioral data will then be used to
investigate the bias and precision of current sampling methodologies, thereby improving the estimates of run size in river herring. Finally, the use of high-resolution acoustics to study the impacts anthropogenic structures on migratory fish movement will also be reported and included in the dissertation.
********************************************************************************
Join Zoom Meeting
https://umassd.zoom.us/j/95655023555?pwd=VVBUaWNLYWFyS1Jyem5kU2xYQ0t0UT09
Meeting ID: 956 5502 3555
Passcode: 885480
One tap mobile
+13126266799,,95655023555#,,,,*885480# US (Chicago)
+16468769923,,95655023555#,,,,*885480# US (New York)
Dial by your location
+1 312 626 6799 US (Chicago)
+1 646 876 9923 US (New York)
+1 301 715 8592 US (Washington DC)
+1 346 248 7799 US (Houston)
+1 669 900 6833 US (San Jose)
+1 253 215 8782 US (Tacoma)
Meeting ID: 956 5502 3555
Passcode: 885480
Find your local number: https://umassd.zoom.us/u/aumvpnBW
Join by SIP
95655023555@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia Sydney)
103.122.167.55 (Australia Melbourne)
149.137.40.110 (Singapore)
64.211.144.160 (Brazil)
149.137.68.253 (Mexico)
69.174.57.160 (Canada Toronto)
65.39.152.160 (Canada Vancouver)
207.226.132.110 (Japan Tokyo)
149.137.24.110 (Japan Osaka)
Meeting ID: 956 5502 3555
Passcode: 885480
********************************************************************************
For additional information, please contact Sue Silva at s1silva@umassd.edu
Contact: > See Description for contact information
Topical Areas: School for Marine Sciences and Technology, SMAST Seminar Series