Department of Fisheries Oceanography/SMAST seminar - April 5, 2017 - Bob Glenn
When: Wednesday,
April 5, 2017
3:30 PM
-
4:30 PM
Where: Fairhaven Campus
Description: Department of Fisheries Oceanography
Demographic patterns of American lobster (Homarus americanus) in Massachusetts Bay as documented by a ventless lobster trap survey
Robert Glenn
Massachusetts Department of Marine Fisheries
Wednesday, April 5, 2017
3:30 pm - 4:30 pm
SMAST II, Room 157
200 Mill Road, Fairhaven, MA
ABSTRACT: “American lobsters are typically associated with “complex” rocky substrate, however, they are also found on “featureless” sand/mud substrates. A lobster’s ability to utilize featureless substrates increases with size and may also be related with an individual’s competitive abilities. Sampling gear used to conduct lobster surveys may bias results and limit the ability to document population characteristics due to limitations related to; gear selectivity, habitat type (depth and substrate), and the spatial extent of a survey. We utilized a fishery-independent ventless lobster trap survey, stratified by depth and substrate type, to survey lobsters over a broad area in Massachusetts Bay. The survey was conducted in cooperation with commercial lobster fishers at 77 sampling stations for two years. This is the first large scale field study to document how physical characteristics of individuals determine their resource holding potential and influence their spatial distribution by habitat type. The non-random distribution of lobsters by size, sex, reproductive status, shell hardness, and cull status, has tremendous implications on the interpretation of population survey indices, as well as on survey design.”
Note: Seminar will be simulcast to SMAST I, Room 204
You can view the seminar live by clicking here: 'live event'. or
https://echosystem.umassd.edu:8443/ess/portal/section/639b0a8e-baf5-49a4-93c3-8f1831f13692
Please note: the earliest you will be able to log in is 15 minutes before the regularly scheduled time.
To view a video of an SMAST seminar (post-October 1, 2014), go to http://www.umassd.edu/smast/newsandevents/seminarseries/ and click on a highlighted title.
For more information, please contact cfox@umassd.edu
Demographic patterns of American lobster (Homarus americanus) in Massachusetts Bay as documented by a ventless lobster trap survey
Robert Glenn
Massachusetts Department of Marine Fisheries
Wednesday, April 5, 2017
3:30 pm - 4:30 pm
SMAST II, Room 157
200 Mill Road, Fairhaven, MA
ABSTRACT: “American lobsters are typically associated with “complex” rocky substrate, however, they are also found on “featureless” sand/mud substrates. A lobster’s ability to utilize featureless substrates increases with size and may also be related with an individual’s competitive abilities. Sampling gear used to conduct lobster surveys may bias results and limit the ability to document population characteristics due to limitations related to; gear selectivity, habitat type (depth and substrate), and the spatial extent of a survey. We utilized a fishery-independent ventless lobster trap survey, stratified by depth and substrate type, to survey lobsters over a broad area in Massachusetts Bay. The survey was conducted in cooperation with commercial lobster fishers at 77 sampling stations for two years. This is the first large scale field study to document how physical characteristics of individuals determine their resource holding potential and influence their spatial distribution by habitat type. The non-random distribution of lobsters by size, sex, reproductive status, shell hardness, and cull status, has tremendous implications on the interpretation of population survey indices, as well as on survey design.”
Note: Seminar will be simulcast to SMAST I, Room 204
You can view the seminar live by clicking here: 'live event'. or
https://echosystem.umassd.edu:8443/ess/portal/section/639b0a8e-baf5-49a4-93c3-8f1831f13692
Please note: the earliest you will be able to log in is 15 minutes before the regularly scheduled time.
To view a video of an SMAST seminar (post-October 1, 2014), go to http://www.umassd.edu/smast/newsandevents/seminarseries/ and click on a highlighted title.
For more information, please contact cfox@umassd.edu
Contact: > See Description for contact information
Topical Areas: School for Marine Sciences and Technology, SMAST Seminar Series