http://lod.bco-dmo.org/id/dataset/3578
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2011-11-21
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Examining Fishing Practices of Divers in the Maine Sea Urchin Fishery: algal cover in study plots from Fishing Vessels NEC-MH2007-1 in the Gulf of Maine from 2009-2010 (NEC-CoopRes project)
2011-11-21
publication
2011-11-21
revision
BCO-DMO Linked Data URI
2011-11-21
creation
http://lod.bco-dmo.org/id/dataset/3578
Margaret Hunter
Maine Department of Marine Resources
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Hunter, M. (2011) Examining Fishing Practices of Divers in the Maine Sea Urchin Fishery: algal cover in study plots from Fishing Vessels NEC-MH2007-1 in the Gulf of Maine from 2009-2010 (NEC-CoopRes project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). Version Date 2011-11-21 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/3578 [access date]
Examining Fishing Practices of Divers in the Maine Sea Urchin Fishery - algal cover in study plots Dataset Description: <p>Project Objectives<br />
In this project, working collaboratively with industry divers, we planned to:<br />
1) Evaluate impacts of non-size-selective harvesting by divers, or 'straight raking', as compared with size-selective harvesting practices, or 'culling on bottom', by simulating harvest methods observed in the current fishery and then comparing long-term effects with control areas,<br />
2) Increase the number of industry divers who have been trained in field assessment techniques,<br />
3) Evaluate the effectiveness of translocating (replanting) culled urchins, using techniques available to any harvester,<br />
4) Inform industry members, managers, and the public of our findings.</p> Methods and Sampling: <p>For complete information, see the <a href="http://nec.whoi.edu/pdf/Hunter_07_Urchin_Divers_Final.pdf" target="_blank">final report</a>.</p>
<p>Site evaluation:<br />
During April 6th to 11th, 2009, shortly after the annual fishing season had closed, all sites were marked and evaluated for urchin abundance and algal cover</p>
<p>Harvest treatments:<br />
Treatments were designated A=straight raking (non-size-selective), B=size-selective fishing (bottom culling), and C=control (unfished). The lane arrangements ABC, CAB, and BCA (left to right when looking at the lanes from the sea toward shore - see figure in final report for the ABC arrangement) were randomly assigned to the three experimental sites, which turned out to be Hancock Point, Winter Harbor, and Frazer Point respectively.<br />
<br />
The harvest treatments were applied April 15 (Winter Harbor) and April 16 (Hancock Point and Frazer Point), 2009. At the size-selective plots (B), one of the two industry divers (Marcus) began at the deep end of the lane and made his way to shore, harvesting mostly only the legalsized sea urchins, using the techniques of size-selective divers. At the non-selective plots (A), the other industry diver (Greg) harvested all sea urchins that a straight-raker would take. That is, clumps of urchins that all appeared too small were passed over, but groups that contained at least one urchin that might be legal were entirely harvested. The third plot (C) at each site was untouched. The divers were video-taped to document the two fishing styles. Standard 2&frac14;-inch stretch mesh catch bags were used throughout.</p>
<p>Counting, Measuring, and Replanting:<br />
Harvested urchins were picked up by the fishing vessel (a 38-ft lobster-type boat with only 3.5 ft draft). On the vessel, all harvested urchins were separated by treatment and size (sub-legal, legal, over-sized), counted, and put in 80-lb (36 kg) plastic fish totes. The determination of size was made by an experienced commercial sea urchin culler. Test diameters were also measured for forty urchins chosen at random from each tote. The totes were only filled to about two-thirds full (about 50-60 lbs) to minimize crushing and spine puncture, and periodically hosed with sea water.<br />
<br />
When harvesting was finished each day, sub-legal and over-sized urchins were moved to the replanting site at Bean Island Ledge and dropped onto it from the surface, over the ground line between the two marker buoys. The replanted sea urchins had been out of the water about 6-7 hours at most. Legal-sized urchins were returned to the sea at an undisclosed site well away from any of the experimental sites.<br />
<br />
Post-harvest site evaluations in April, 2009:<br />
After harvest (later the same day), the harvested plots were re-evaluated for urchin density as above. The replanted site was also re-evaluated for urchin density as above at the end of the second day of replanting (April 16, 2009).<br />
<br />
On April 24, a little over a week after translocating, the replanted site (Bean Island Ledge) was evaluated for urchin density, and for urchin mortality by counting healthy-appearing urchins and moribund or broken ones in 60 random quadrats.<br />
<br />
After re-evaluation, the groundlines were removed from each site.</p>
<p>Re-evaluations in July, 2009:<br />
On July 1, 2009, the two industry divers re-evaluated the harvest and control lanes at the Winter Harbor and Frazer Point sites, using the same methods described above, except that no urchins were collected for measurement. First, ground lines were laid to mark the three lanes at each site, using buoyed anchors and bolts left behind during the last visit. On July 2, they marked and re-evaluated the harvest and control lanes at the Hancock Point site and the replanted and control areas at Bean Island. Then the ground lines were removed from all sites. A total of 11 dives were made by each of the two divers during this period (three at each of the three harvest sites and two at the transplant site), and each diver evaluated 30 quadrats during each dive, for a grand total of 660 quadrats evaluated for urchin counts and algal cover, including about 66 from which urchins were removed and measured on the boat.<br />
<br />
Re-evaluations in September, 2009:<br />
On September 1 and 2, 2009, just before the fishing season opened, the four sites were marked and evaluated in the same manner again, including collecting urchins for measurement. All lanes at all the sites were also videotaped under water. Then the ground lines were removed from all sites.<br />
<br />
Re-evaluations in June, 2010:<br />
On June 29 and 30, 2010, after the fishing season had closed, the four sites were marked, evaluated, and videotaped in the same manner again. Then the ground lines were removed for the last time.</p>
Funding provided by NorthEast Consortium (NEC) Award Number: 09-019
completed
Margaret Hunter
Maine Department of Marine Resources
(207) 633-9541
PO Box 8
West Boothbay Harbor
ME
04575
margaret.hunter@maine.gov
pointOfContact
asNeeded
Unknown
visit
year
month_local
station
lat
lon
day_local
yrday_local
diver_id
lane
quadrat_id
depth_w
count
green_pcent
flesh_red_pcent
filam_red_pcent
turf
crust_pcent
canopy_pcent
theme
None, User defined
No BCO-DMO term
year
month_local
station
latitude
longitude
day_local
day of year and decimal time (local time zone)
depth_w
count
featureType
BCO-DMO Standard Parameters
NEC-MH2007-1
service
Deployment Activity
Gulf of Maine
place
Locations
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
NorthEast Consortium
http://northeastconsortium.org/
NorthEast Consortium
The Northeast Consortium encourages and funds
cooperative research and monitoring projects in the Gulf of Maine and Georges Bank that have effective,
equal partnerships among fishermen, scientists, educators, and marine resource managers.
At the 2008 Maine Fisheremen's Forum, the Northeast Consortium organized a session on data collection and availability. Participants included several key organizations in the Gulf of Maine area, sharing what data are out there and how you can find them.
The Northeast Consortium has joined the Gulf of Maine Ocean Data Partnership. The purpose of the GoMODP is to promote and coordinate the sharing, linking, electronic dissemination, and use of data on the Gulf of Maine region.
The Northeast Consortium was created in 1999 to encourage and fund effective, equal partnerships among commercial fishermen, scientists, and other stakeholders to engage in cooperative research and monitoring projects in the Gulf of Maine and Georges Bank. The Northeast Consortium consists of four research institutions (University of New Hampshire, University of Maine, Massachusetts Institute of Technology, and Woods Hole Oceanographic Institution), which are working together to foster this initiative.
The Northeast Consortium administers nearly $5M annually from the National Oceanic and Atmospheric Administration for cooperative research on a broad range of topics including gear selectivity, fish habitat, stock assessments, and socioeconomics. The funding is appropriated to the National Marine Fisheries Service and administered by the University of New Hampshire on behalf of the Northeast Consortium. Funds are distributed through an annual open competition, which is announced via a Request for Proposals (RFP). All projects must involve partnership between commercial fishermen and scientists.
The Northeast Consortium seeks to fund projects that will be conducted in a responsible manner. Cooperative research projects should be designed to minimize any negative impacts to ecosystems or marine organisms, and be consistent with accepted ethical research practices, including the use of animals and human subjects in research, scrutiny of research protocols by an institutional board of review, etc.
NEC
largerWorkCitation
program
Northeast Consortium: Cooperative Research
http://northeastconsortium.org/
Northeast Consortium: Cooperative Research
<p>The Northeast Consortium encourages and funds cooperative research and monitoring projects in the Gulf of Maine and Georges Bank that have effective, equal partnerships among fishermen, scientists, educators, and marine resource managers.</p>
<p>The Northeast Consortium seeks to fund projects that will be conducted in a responsible manner. Cooperative research projects are designed to minimize any negative impacts to ecosystems or marine organisms, and be consistent with accepted ethical research practices, including the use of animals and human subjects in research, scrutiny of research protocols by an institutional board of review, etc.</p>
NEC-CoopRes
largerWorkCitation
project
eng; USA
oceans
Gulf of Maine
2011-11-21
Georges Bank, Gulf of Maine
0
BCO-DMO catalogue of parameters from Examining Fishing Practices of Divers in the Maine Sea Urchin Fishery: algal cover in study plots from Fishing Vessels NEC-MH2007-1 in the Gulf of Maine from 2009-2010 (NEC-CoopRes project)
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/26324.rdf
Name: visit
Units: text
Description: <p>whether collections were made pre- or post-harvest of urchins</p>
http://lod.bco-dmo.org/id/dataset-parameter/26325.rdf
Name: year
Units: YYYY
Description: <p>year of sampling</p>
http://lod.bco-dmo.org/id/dataset-parameter/26326.rdf
Name: month_local
Units: MM
Description: <p>month of sampling - local time</p>
http://lod.bco-dmo.org/id/dataset-parameter/26327.rdf
Name: station
Units: text
Description: <p>station code: BI = Bean Island ledge; FP = Frazer Point; HP = Hancock Point; WH = Winter Harbor</p>
http://lod.bco-dmo.org/id/dataset-parameter/26328.rdf
Name: lat
Units: decimal degrees
Description: <p>latitude: North is positive; negative denotes South</p>
http://lod.bco-dmo.org/id/dataset-parameter/26329.rdf
Name: lon
Units: decimal degrees
Description: <p>longitude: East is positive; negative denotes West</p>
http://lod.bco-dmo.org/id/dataset-parameter/26330.rdf
Name: day_local
Units: number
Description: <p>day of sampling - local time</p>
http://lod.bco-dmo.org/id/dataset-parameter/26331.rdf
Name: yrday_local
Units: number
Description: <p>local day and decimal time; as 326.5 for the 326th day of the year; or November 22 at 1200 hours (noon)</p>
http://lod.bco-dmo.org/id/dataset-parameter/26332.rdf
Name: diver_id
Units: text
Description: <p>initials of diver's name</p>
http://lod.bco-dmo.org/id/dataset-parameter/26333.rdf
Name: lane
Units: integer
Description: <p>sampling area within each plot</p>
http://lod.bco-dmo.org/id/dataset-parameter/26334.rdf
Name: quadrat_id
Units: integer
Description: <p>1-m^2 subsampling area within plots</p>
http://lod.bco-dmo.org/id/dataset-parameter/26335.rdf
Name: depth_w
Units: feet
Description: <p>approximate depth of water</p>
http://lod.bco-dmo.org/id/dataset-parameter/26336.rdf
Name: count
Units: integer
Description: <p>number of urchins collected in a quadrat</p>
http://lod.bco-dmo.org/id/dataset-parameter/26337.rdf
Name: green_pcent
Units: percent
Description: <p>the percent cover of green algae</p>
http://lod.bco-dmo.org/id/dataset-parameter/26338.rdf
Name: flesh_red_pcent
Units: percent
Description: <p>the percent cover of fleshy red algae</p>
http://lod.bco-dmo.org/id/dataset-parameter/26339.rdf
Name: filam_red_pcent
Units: percent
Description: <p>the percent cover of filamentous red algae</p>
http://lod.bco-dmo.org/id/dataset-parameter/26340.rdf
Name: turf
Units: percent
Description: <p>the percent cover of 'turfing' algae: sum of green and red algae</p>
http://lod.bco-dmo.org/id/dataset-parameter/26341.rdf
Name: crust_pcent
Units: percent
Description: <p>the percent cover of encrusting algae</p>
http://lod.bco-dmo.org/id/dataset-parameter/26342.rdf
Name: canopy_pcent
Units: percent
Description: <p>the percent cover of canopy algae</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
120120
https://datadocs.bco-dmo.org/file/GwwAkjNUB9AZ3j/algal_cover.csv
algal_cover.csv
Primary data file for dataset ID 3578
download
https://osprey.bco-dmo.org/dataset/3578/data/download
download
onLine
dataset
<p>For complete information, see the <a href="http://nec.whoi.edu/pdf/Hunter_07_Urchin_Divers_Final.pdf" target="_blank">final report</a>.</p>
<p>Site evaluation:<br />
During April 6th to 11th, 2009, shortly after the annual fishing season had closed, all sites were marked and evaluated for urchin abundance and algal cover</p>
<p>Harvest treatments:<br />
Treatments were designated A=straight raking (non-size-selective), B=size-selective fishing (bottom culling), and C=control (unfished). The lane arrangements ABC, CAB, and BCA (left to right when looking at the lanes from the sea toward shore - see figure in final report for the ABC arrangement) were randomly assigned to the three experimental sites, which turned out to be Hancock Point, Winter Harbor, and Frazer Point respectively.<br />
<br />
The harvest treatments were applied April 15 (Winter Harbor) and April 16 (Hancock Point and Frazer Point), 2009. At the size-selective plots (B), one of the two industry divers (Marcus) began at the deep end of the lane and made his way to shore, harvesting mostly only the legalsized sea urchins, using the techniques of size-selective divers. At the non-selective plots (A), the other industry diver (Greg) harvested all sea urchins that a straight-raker would take. That is, clumps of urchins that all appeared too small were passed over, but groups that contained at least one urchin that might be legal were entirely harvested. The third plot (C) at each site was untouched. The divers were video-taped to document the two fishing styles. Standard 2&frac14;-inch stretch mesh catch bags were used throughout.</p>
<p>Counting, Measuring, and Replanting:<br />
Harvested urchins were picked up by the fishing vessel (a 38-ft lobster-type boat with only 3.5 ft draft). On the vessel, all harvested urchins were separated by treatment and size (sub-legal, legal, over-sized), counted, and put in 80-lb (36 kg) plastic fish totes. The determination of size was made by an experienced commercial sea urchin culler. Test diameters were also measured for forty urchins chosen at random from each tote. The totes were only filled to about two-thirds full (about 50-60 lbs) to minimize crushing and spine puncture, and periodically hosed with sea water.<br />
<br />
When harvesting was finished each day, sub-legal and over-sized urchins were moved to the replanting site at Bean Island Ledge and dropped onto it from the surface, over the ground line between the two marker buoys. The replanted sea urchins had been out of the water about 6-7 hours at most. Legal-sized urchins were returned to the sea at an undisclosed site well away from any of the experimental sites.<br />
<br />
Post-harvest site evaluations in April, 2009:<br />
After harvest (later the same day), the harvested plots were re-evaluated for urchin density as above. The replanted site was also re-evaluated for urchin density as above at the end of the second day of replanting (April 16, 2009).<br />
<br />
On April 24, a little over a week after translocating, the replanted site (Bean Island Ledge) was evaluated for urchin density, and for urchin mortality by counting healthy-appearing urchins and moribund or broken ones in 60 random quadrats.<br />
<br />
After re-evaluation, the groundlines were removed from each site.</p>
<p>Re-evaluations in July, 2009:<br />
On July 1, 2009, the two industry divers re-evaluated the harvest and control lanes at the Winter Harbor and Frazer Point sites, using the same methods described above, except that no urchins were collected for measurement. First, ground lines were laid to mark the three lanes at each site, using buoyed anchors and bolts left behind during the last visit. On July 2, they marked and re-evaluated the harvest and control lanes at the Hancock Point site and the replanted and control areas at Bean Island. Then the ground lines were removed from all sites. A total of 11 dives were made by each of the two divers during this period (three at each of the three harvest sites and two at the transplant site), and each diver evaluated 30 quadrats during each dive, for a grand total of 660 quadrats evaluated for urchin counts and algal cover, including about 66 from which urchins were removed and measured on the boat.<br />
<br />
Re-evaluations in September, 2009:<br />
On September 1 and 2, 2009, just before the fishing season opened, the four sites were marked and evaluated in the same manner again, including collecting urchins for measurement. All lanes at all the sites were also videotaped under water. Then the ground lines were removed from all sites.<br />
<br />
Re-evaluations in June, 2010:<br />
On June 29 and 30, 2010, after the fishing season had closed, the four sites were marked, evaluated, and videotaped in the same manner again. Then the ground lines were removed for the last time.</p>
Specified by the Principal Investigator(s)
<p>Data and Statistical Analyses<br />
Mean sea urchin abundances (counts&middot;m-2) for each experimental lane, for each date and site, were calculated. Mean algal cover (%) was calculated for each of the three categories: crusting, total turfing, and canopy. Turfing and canopy covers were added together for analysis. Note that these could total more than 100%, if canopy cover overlaid turf. Median urchin test diameters were calculated for each experimental lane. Means and medians were plotted over time, to compare pre-harvest conditions with post-harvest, and identify short and long term trends. Two sample t-tests were performed selectively to test for differences between two treatment abundances, or before-after comparisons. One-way ANOVA and the Tukey test were used when multiple range testing was required. Mann-Whitney rank testing was used to test for differences in algal cover (Zar 1999).</p>
Specified by the Principal Investigator(s)
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
Cruise: NEC-MH2007-1
NEC-MH2007-1
Fishing Vessels
vessel
NEC-MH2007-1
Margaret Hunter
Maine Department of Marine Resources
Fishing Vessels
vessel