http://lod.bco-dmo.org/id/dataset/3707
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
2012-08-30
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Visual estimates of seal abundance from aerial surveys conducted by a Cessna-185 in the San Juan Islands, Salish Sea in 2008 (Seal_response_to_prey project)
2012-11-16
publication
2012-11-16
revision
BCO-DMO Linked Data URI
2012-11-16
creation
http://lod.bco-dmo.org/id/dataset/3707
Alejandro Acevedo-Gutierrez
Western Washington University
principalInvestigator
Jeffrey F Bromaghin
United States Geological Survey
principalInvestigator
Steven J Jeffries
Washington Department of Fish and Wildlife
principalInvestigator
John M Kennish
University of Alaska, Anchorage
principalInvestigator
Monique M Lance
Washington Department of Fish and Wildlife
principalInvestigator
Philip S. Levin
National Marine Fisheries Service
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: Acevedo-Gutierrez, A., Levin, P. S., Bromaghin, J. F., Jeffries, S. J., Kennish, J. M., Lance, M. M. (2012) Visual estimates of seal abundance from aerial surveys conducted by a Cessna-185 in the San Juan Islands, Salish Sea in 2008 (Seal_response_to_prey project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 16 Nov 2012) Version Date 2012-11-16 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/3707 [access date]
Visual estimates of seal abundance from 2008 aerial surveys of the Salish Sea. Dataset Description: <p>Number of seals counted during several aerial surveys of the Salish Sea during July and August of 2008. Data are also available from <a href="https://www.bco-dmo.org/dataset/3706">2007 surveys</a>.</p>
<p><strong>Related publications:</strong> (Both available from <a href="http://biol.wwu.edu/mbel/?page=papers" target="_blank">Alejandro Acevedo's lab website</a>.)<br />
<strong>Howard</strong>, S. 2009. Seasonal energy budgets to model energy use and prey consumption in harbor seals (<em>Phoca vitulina</em>) in the San Juan Islands, WA. MSc thesis, Department of Biology, Western Washington University, Bellingham, WA.<br />
<strong>Hardee</strong>, S. 2008. Movements and home ranges of harbor seals (<em>Phoca vitulina</em>) in the Georgia Basin: implications for marine reservinland waters of the Pacific Northwest. MSc thesis, Department of Biology, Western Washington University, Bellingham, WA.</p> Methods and Sampling: <p>Following protocol from Jeffries et al. (2003), with collaboration from the Washington Department of Fish and Wildlife, surveys were flown in a Cessna 185 at 200 to 300 m, moving at 90 kt, on two or three consecutive days during moderately low tides. Flights were made over the region moving with the tide, to cover the entire area within +/- 2 h from low tide. Visual counts were taken on sites with &lt; 25 seals and digital photographs and visual counts were taken concurrently at sites with &gt; 25 animals, using a Nikon D100 with a 200 mm lens. The time was documented on the survey log for all haul-out counts, haul-out estimates and photographs. Surveys were conducted under permit 782-1702 awarded to the Washington Department of Fish and Wildlife by the Office of Protected Resources.</p>
<p>Selection of flight times was not only dependent on tidal conditions but also on time of day. If one chooses tidal heights that are extremely low, there is a risk that the survey underestimates the number of seals in the region because normal haul-out sites may be inaccessible (Jeffries, pers. comm.). Additionally, fog may become problematic for flying if the tide window, especially in August, is too early in the morning. These factors were taken into account when selecting the survey dates.</p>
<p>Tide times on dates of aerial surveys are as follows:<br />
<strong>Date&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Tide Station&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Tide Time&nbsp;&nbsp;&nbsp;&nbsp; Tide Height (ft)</strong><br />
07/17/08&nbsp; Port Townsend&nbsp;&nbsp;&nbsp;&nbsp; 10:12&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -1.7<br />
07/18/08&nbsp; Port Townsend &nbsp;&nbsp;&nbsp; 10:49 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -1.8<br />
07/18/08&nbsp; Seattle&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 11:48&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -1.6<br />
07/31/08&nbsp; Port Townsend&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 09:44&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -2.6<br />
07/31/08&nbsp; Seattle&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 10:39&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -2.9<br />
08/01/08&nbsp; Port Townsend&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 10:32&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -2.4<br />
08/14/08&nbsp; Port Townsend&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 09:14&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -0.9<br />
08/15/08&nbsp; Port Townsend&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 09:52&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -1.0</p>
<p><strong>References:</strong><br />
<strong>Jeffries</strong> SJ, Huber HR, Calambokidis J, Laake J (2003) Trends and status of harbor seals in Washington State: 1978-1999. Journal of Wildlife Management 67:208-219. Available online from <a href="http://wdfw.wa.gov/publications/00431/" target="_blank">Washington Department of Fish and Wildlife</a>.<br />
<strong>Huber</strong> HR, Jeffries SJ, Brown RF, DeLong RL, Van Blaricom G (2001) Correcting aerial survey counts of harbor seals (<em>Phoca vitulina richardsi</em>) in Washington and Oregon. Marine Mammal Science 17:276-293. DOI:&nbsp;<a href="http://dx.doi.org/10.1111/j.1748-7692.2001.tb01271.x" target="_blank">10.1111/j.1748-7692.2001.tb01271.x</a></p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-0550443 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=0550443
completed
Alejandro Acevedo-Gutierrez
Western Washington University
1-360-650-3653
Department of Biology 516 High St. MS#9160
Bellingham
WA
98225-9160
USA
acevedo@biol.wwu.edu
pointOfContact
Jeffrey F Bromaghin
United States Geological Survey
1-907-786-7086
Alaska Science Center 4210 University Drive
Anchorage
AK
99508
USA
jbromaghin@usgs.gov
pointOfContact
Steven J Jeffries
Washington Department of Fish and Wildlife
1-253-589-7235
Marine Mammal Investigations 7801 Phillips Road SW
Lakewood
WA
98498
USA
Steven.Jeffries@dfw.wa.gov
pointOfContact
John M Kennish
University of Alaska, Anchorage
1-907-786-1236
Department of Chemistry and ASET Laboratory 3211 Providence Drive
Anchorage
AK
99508
USA
afjmk@uaa.alaska.edu
pointOfContact
Monique M Lance
Washington Department of Fish and Wildlife
1-253-691-3409
Wildlife Research Program 7801 Phillips Road SW
Lakewood
WA
98498
USA
Monique.Lance@dfw.wa.gov
pointOfContact
Philip S. Levin
National Marine Fisheries Service
206-860-3473
Northwest Fisheries Science Center, Northwest Regional Office 2725 Montlake Blvd E
Seattle
WA
98112
USA
Phil.Levin@noaa.gov
pointOfContact
asNeeded
Dataset Version: 16 Nov 2012
Unknown
date
month
day
year
site_code
lat
lon
time_local
species
est_total
est_pups
count_total
count_pups
photo
photo_no
count_type
count_q_flag
comment
Camera
theme
None, User defined
date_local
month_local
day_local
year
Site_ID
latitude
longitude
time_local
species scientific name (binomial)
No BCO-DMO term
count
quality flag
comments
featureType
BCO-DMO Standard Parameters
Camera
instrument
BCO-DMO Standard Instruments
Aerial_Survey_2008_SRtP
service
Deployment Activity
San Juan Islands, Salish Sea
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.
Responses of Seals and Sea Lions to Increased Rockfish Density
http://biol.wwu.edu/mbel/?page=research
Responses of Seals and Sea Lions to Increased Rockfish Density
<p><strong>From NSF proposal:</strong><br />
This project is a collaborative study of the responses of harbor seals and other mammalian predators to changes in prey density in Puget Sound. The general study approach will involve multi-year field estimates to observe the responses of predators to rockfish density in protected areas, candidate marine reserves, and unprotected sites.</p>
<p>The collaborating investigators will estimate 1) rockfish density using visual and mark and recapture techniques; 2) predator abundance using aerials surveys and dedicated land observations; and 3) predator food consumption using scat to describe diet, tagging of harbor seals to describe individual foraging sites, and population-based and individual bioenergetics models to describe consumption of rockfish. The investigators will also take into account confounding factors that might explain predator behavior, such as environmental variables and alternative prey, by creating a GIS database from available information from the area. The different field observations and database estimates are explicitly linked through a common hypothesis and coordinated methodologies, and their results will be integrated into a model describing the impact of predation on rockfish populations. The responses of top predators to changes in prey density and their impact on fish populations of interest are unknown. This study will evaluate the effectiveness of MPAs as fish refugia, offer a framework for the management and conservation of marine resources, and provide an exciting opportunity for students to participate in ecological and conservation research.</p>
<p><strong>Hypotheses:</strong><br />
1) Harbor seals and other pinniped species show aggregative responses to changes in prey density. Hence, their abundance will increase with fish density.<br />
2) Harbor seals and other pinniped species show Type 2 or 3 functional responses to changes in prey density. Thus, their consumption rate of a particular prey type follows an asymptotic or sigmoidal curve relative to the prey’s density, respectively.<br />
3) Predation by harbor seals and other pinniped species is sufficiently intense that it impedes recovery of depleted fish populations.</p>
<p><strong>Objectives:</strong><br />
1) Quantify the number of harbor seals and other pinniped species in relation to rockfish density and other environmental (confounding) factors.<br />
2) Estimate the consumption rate of harbor seals and other pinniped species in relation to rockfish density and other prey species.<br />
3) Correlatively estimate the influence of predation by harbor seals and other pinniped species on survivorship and population size of rockfish.</p>
<p><strong>Publications resulting from this NSF award:</strong><br />
<strong>Bjorland</strong>, R. H., Pearson, S. F, Jeffries, S. J, Lance, M. M., Acevedo- Gutiérrez, A. & Ward, E. J. 2015. Stable isotope mixing models elucidate sex and size effects on the diet of a generalist marine predator. Marine Ecology Progress Series 526: 213-225. DOI: <a href="http://dx.doi.org/10.3354/meps11230" target="_blank">10.3354/meps11230</a><br />
<strong>Bromaghin</strong>, J. F., Lance, M. M., Elliott, E. W., Jeffries, S. J., Acevedo-Gutierrez, A. & Kennish, J. M. 2013. New insights into the diets of harbor seals in the Salish Sea of western North America revealed by quantitative fatty acid signature analysis. Fishery Bulletin 111: 13-26. DOI: <a href="http://dx.doi.org/10.7755/FB.111.1.2" target="_blank">10.7755/FB.111.1.2</a><br />
<strong>Buzzell</strong>, B.1, Lance, M. & Acevedo-Gutiérrez, A. 2014. Spatial and temporal variation in river otter (Lontra canadensis) diet and predation on rockfish (Genus Sebastes) in the San Juan Islands, Washington. Aquatic Mammals 40: 150- 161. DOI: <a href="http://dx.doi.org/10.1578/AM.40.2.2014.150" target="_blank">10.1578/AM.40.2.2014.150</a><br />
<strong>Howard</strong>, S., Lance, M., Jeffries, S. & Acevedo-Gutierrez, A. 2013. Fish consumption by harbor seals (Phoca vitulina) in the San Juan Islands, WA. Fishery Bulletin 111: 27-41. DOI: <a href="http://dx.doi.org/10.7755/FB.111.1.3" target="_blank">10.7755/FB.111.1.3</a><br />
<strong>Lance</strong>, M. M., Chang, W.-Y., Jeffries, S. J., Pearson, S. F. & Acevedo-Gutierrez, A. 2012. Harbor seal diet in northern Puget Sound: implications for the recovery of depressed fish stocks. Marine Ecology Progress Series 464:257-271. DOI:<a href="http://dx.doi.org/10.3354/meps09880" target="_blank">10.3354/meps09880</a><br />
<strong>Luxa</strong>, K. & Acevedo-Gutierrez, A. 2013. Food habits of harbor seals (<em>Phoca vitulina</em>) in two estuaries in the central Salish Sea. Aquatic Mammals 39: 10- 22. DOI: <a href="http://dx.doi.org/10.1578/AM.39.1.2013.10" target="_blank">10.1578/AM.39.1.2013.10</a><br />
<strong>Peterson</strong>, S., Lance, M. M., Jeffries, S. J. & Acevedo-Gutierrez, A. 2012. Long distance movements and disjunct spatial use of harbor seals (<em>Phoca vitulina</em>) in the inland waters of the Pacific Northwest. PLoS ONE 7: e39046. DOI: <a href="http://dx.doi.org/10.1371/journal.pone.0039046" target="_blank">10.1371/journal.pone.0039046</a><br />
<strong>Thomas</strong>, AC; Lance, MM; Jeffries, SJ; Miner, BG; Acevedo-Gutierrez, A. 2011. Harbor seal foraging response to a seasonal resource pulse, spawning Pacific herring. Marine Ecology-Progress Series, v.441. p. 225. DOI: <a href="http://dx.doi.org/10.3354/meps09370" target="_blank">10.3354/meps09370</a><br />
<strong>Ward</strong>, EJ; Levin, PS; Lance, MM; Jeffries, SJ; Acevedo-Gutierrez, A. 2012. Integrating diet and movement data to identify hot spots of predation risk and areas of conservation concern for endangered species. Conservation Letters, v.5, p. 37. DOI: <a href="http://dx.doi.org/10.1111/j.1755-263X.2011.00210.x" target="_blank">10.1111/j.1755-263X.2011.00210.x</a><br />
<strong>Wilson</strong>, K.2, Lance, M., Jeffries, S. & Acevedo-Gutiérrez, A. 2014. Fine-scale variability in harbor seal foraging behavior. PLoS ONE 9: e92838. DOI: <a href="http://dx.doi.org/10.1371/journal.pone.0092838" target="_blank">10.1371/journal.pone.0092838</a>.</p>
Seal_response_to_prey
largerWorkCitation
project
eng; USA
oceans
San Juan Islands, Salish Sea
2012-11-16
Salish Sea, USA and Canada
0
BCO-DMO catalogue of parameters from Visual estimates of seal abundance from aerial surveys conducted by a Cessna-185 in the San Juan Islands, Salish Sea in 2008 (Seal_response_to_prey 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/29326.rdf
Name: date
Units: mmddyy
Description: <p>Month, day, and year in mmddyy format (local time).</p>
http://lod.bco-dmo.org/id/dataset-parameter/29327.rdf
Name: month
Units: mm (01 to 12)
Description: <p>2-digit month of year, local time.</p>
http://lod.bco-dmo.org/id/dataset-parameter/29328.rdf
Name: day
Units: dd (01 to 31)
Description: <p>2-digit day of month, local time.</p>
http://lod.bco-dmo.org/id/dataset-parameter/29329.rdf
Name: year
Units: YYYY
Description: <p>4-digit year (local time).</p>
http://lod.bco-dmo.org/id/dataset-parameter/29330.rdf
Name: site_code
Units: unitless
Description: <p>Numeric identifier for the sampling site.</p>
http://lod.bco-dmo.org/id/dataset-parameter/29331.rdf
Name: lat
Units: decimal degrees
Description: <p>Latitude; North = positive. (Added by BCO-DMO; assumes site_codes used in 2008 are the same locations as 2007.)</p>
http://lod.bco-dmo.org/id/dataset-parameter/29332.rdf
Name: lon
Units: decimal degrees
Description: <p>Longitude; West = negative. (Added by BCO-DMO; assumes site_codes used in 2008 are the same locations as 2007.)</p>
http://lod.bco-dmo.org/id/dataset-parameter/29333.rdf
Name: time_local
Units: HH:MM
Description: <p>Local time when the survey occurred, in hours and minutes, 24-hour clock.</p>
http://lod.bco-dmo.org/id/dataset-parameter/29334.rdf
Name: species
Units: text
Description: <p>Name of the species:<br /><br />
Phoca vitulina = Harbor seal<br /><br />
Mirounga angustirostris = Northern elephant seal<br /><br />
Eumetopias jubatus = Steller sea lion</p>
http://lod.bco-dmo.org/id/dataset-parameter/29335.rdf
Name: est_total
Units: unitless
Description: <p>Estimated total number of seals.</p>
http://lod.bco-dmo.org/id/dataset-parameter/29336.rdf
Name: est_pups
Units: unitless
Description: <p>Estimated number of pups.</p>
http://lod.bco-dmo.org/id/dataset-parameter/29337.rdf
Name: count_total
Units: unitless
Description: <p>Total number seals, corrected using photos if available.</p>
http://lod.bco-dmo.org/id/dataset-parameter/29338.rdf
Name: count_pups
Units: unitless
Description: <p>Number of pups, corrected using photos if available.</p>
http://lod.bco-dmo.org/id/dataset-parameter/29339.rdf
Name: photo
Units: unitless
Description: <p>TRUE = photo was taken; FALSE = no photo was taken.</p>
http://lod.bco-dmo.org/id/dataset-parameter/29340.rdf
Name: photo_no
Units: unitless
Description: <p>The photograph identification number, if a photo was taken.</p>
http://lod.bco-dmo.org/id/dataset-parameter/29341.rdf
Name: count_type
Units: unitless
Description: <p>1 = hauled out; 2 = in the water.</p>
http://lod.bco-dmo.org/id/dataset-parameter/29342.rdf
Name: count_q_flag
Units: unitless
Description: <p>Count quality flag:<br /><br />
1 = slides countable;<br /><br />
2 = slides blurry or similar problem but countable;<br /><br />
3 = seals disturbed after photo or count;<br /><br />
4 = major disturbance (by plane) before plane or count;<br /><br />
5 = major disturbance (other than plane);<br /><br />
6 = slides not countable or estimate >50 and no slides;<br /><br />
7 = miscellaneous reason for concern about count or estimate.</p>
http://lod.bco-dmo.org/id/dataset-parameter/29343.rdf
Name: comment
Units: text
Description: <p>Remarks/comments about the observation.</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
55165
https://datadocs.bco-dmo.org/file/4WW2rXKtJ6qM7r/seal_counts_2008.csv
seal_counts_2008.csv
Primary data file for dataset ID 3707
download
https://osprey.bco-dmo.org/dataset/3707/data/download
download
onLine
dataset
<p>Following protocol from Jeffries et al. (2003), with collaboration from the Washington Department of Fish and Wildlife, surveys were flown in a Cessna 185 at 200 to 300 m, moving at 90 kt, on two or three consecutive days during moderately low tides. Flights were made over the region moving with the tide, to cover the entire area within +/- 2 h from low tide. Visual counts were taken on sites with &lt; 25 seals and digital photographs and visual counts were taken concurrently at sites with &gt; 25 animals, using a Nikon D100 with a 200 mm lens. The time was documented on the survey log for all haul-out counts, haul-out estimates and photographs. Surveys were conducted under permit 782-1702 awarded to the Washington Department of Fish and Wildlife by the Office of Protected Resources.</p>
<p>Selection of flight times was not only dependent on tidal conditions but also on time of day. If one chooses tidal heights that are extremely low, there is a risk that the survey underestimates the number of seals in the region because normal haul-out sites may be inaccessible (Jeffries, pers. comm.). Additionally, fog may become problematic for flying if the tide window, especially in August, is too early in the morning. These factors were taken into account when selecting the survey dates.</p>
<p>Tide times on dates of aerial surveys are as follows:<br />
<strong>Date&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Tide Station&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Tide Time&nbsp;&nbsp;&nbsp;&nbsp; Tide Height (ft)</strong><br />
07/17/08&nbsp; Port Townsend&nbsp;&nbsp;&nbsp;&nbsp; 10:12&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -1.7<br />
07/18/08&nbsp; Port Townsend &nbsp;&nbsp;&nbsp; 10:49 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -1.8<br />
07/18/08&nbsp; Seattle&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 11:48&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -1.6<br />
07/31/08&nbsp; Port Townsend&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 09:44&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -2.6<br />
07/31/08&nbsp; Seattle&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 10:39&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -2.9<br />
08/01/08&nbsp; Port Townsend&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 10:32&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -2.4<br />
08/14/08&nbsp; Port Townsend&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 09:14&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -0.9<br />
08/15/08&nbsp; Port Townsend&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 09:52&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; -1.0</p>
<p><strong>References:</strong><br />
<strong>Jeffries</strong> SJ, Huber HR, Calambokidis J, Laake J (2003) Trends and status of harbor seals in Washington State: 1978-1999. Journal of Wildlife Management 67:208-219. Available online from <a href="http://wdfw.wa.gov/publications/00431/" target="_blank">Washington Department of Fish and Wildlife</a>.<br />
<strong>Huber</strong> HR, Jeffries SJ, Brown RF, DeLong RL, Van Blaricom G (2001) Correcting aerial survey counts of harbor seals (<em>Phoca vitulina richardsi</em>) in Washington and Oregon. Marine Mammal Science 17:276-293. DOI:&nbsp;<a href="http://dx.doi.org/10.1111/j.1748-7692.2001.tb01271.x" target="_blank">10.1111/j.1748-7692.2001.tb01271.x</a></p>
Specified by the Principal Investigator(s)
<p>The estimation of seal population size based on haul-out counts requires a correction factor to account for seals in the water at the time of the survey (Huber et al. 2001, Jeffries et al. 2003), however, correction factors have NOT been applied to these data.</p>
<p><strong>BCO-DMO made the following edits to the dataset:</strong><br />
&nbsp;- Blanks and 'NA' were replaced with 'nd' to indicate 'no data';<br />
&nbsp;- Parameter names were modified to conform with BCO-DMO conventions;<br />
&nbsp;- day, month, and year were separated from original date column;<br />
&nbsp;- Abbreviated species names were replaced with the full species names;<br />
&nbsp;- Corrected typos in the year column from '2009' to '2008';<br />
&nbsp;- lat and lon were added based on the site_code (2007 site_codes are the same locations as 2008).</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
Camera
Camera
PI Supplied Instrument Name: Camera PI Supplied Instrument Description:Photos were taken using a Nikon D100 with a 200 mm lens. Instrument Name: Camera Instrument Short Name:camera Instrument Description: All types of photographic equipment including stills, video, film and digital systems. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/311/
Deployment: Aerial_Survey_2008_SRtP
Aerial_Survey_2008_SRtP
Cessna-185
aircraft
Aerial_Survey_2008_SRtP
Alejandro Acevedo-Gutierrez
Western Washington University
Cessna-185
aircraft