http://lod.bco-dmo.org/id/dataset/3786
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
2012-11-20
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Summary of prey groups found in harbor seal scat samples from the San Juan Islands analyzed at the Acevedo lab at Western Washington University during 2005-2008 (Seal_response_to_prey project)
2012-12-12
publication
2012-12-12
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2019-08-01
publication
https://doi.org/10.1575/1912/bco-dmo.3786.1
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., Bromaghin, J., Jeffries, S., Kennish, J., Lance, M., Levin, P. (2012) Summary of prey groups found in harbor seal scat samples from the San Juan Islands analyzed at the Acevedo lab at Western Washington University during 2005-2008 (Seal_response_to_prey project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2012-12-12 [if applicable, indicate subset used]. doi:10.1575/1912/bco-dmo.3786.1 [access date]
Summary of prey groups found in harbor seal scat samples from the San Juan Islands. Dataset Description: <p>Frequency of occurrence of taxonomic groups of prey identified in harbor seal scat samples collected from 2005 to 2008, summarized by region and season. Four regions of the San Juan Islands of Washington state were sampled: Eastern Bays, Rosario Strait, San Juan Channel, and the Southern Strait of Georgia.</p>
<p>Also see the related dataset, seal_prey_species_counts (<a href="https://www.bco-dmo.org/dataset/3817" target="_blank">https://www.bco-dmo.org/dataset/3817</a>), where counts are provided for individual species by season (with no distinction between sampling regions).</p>
<p>Data and methods, including sample sizes, are described in:<br />
<strong>Lance</strong>, M. M., Chang, W.-Y., Jeffries, S. J., Pearson, S. F. &amp; 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></p> Methods and Sampling: <p><strong>From Lance et al.:</strong><br />
From 2005 to 2008, fecal samples (scats) were collected seasonally over 3 collection periods: March to early June (‘spring’), late July to September (‘summer/fall’), and January to February (‘winter’). Scats were collected from 23 haul-out locations during daytime low tides. The sites were dispersed throughout the study area, represented various habitat types used by harbor seals, were the largest haul-outs where adequate sample sizes could be collected, and were easily accessible by boat. Two or three collection trips were made each season, with a target sample size of 60 scats per season per region.</p>
<p>Samples were stored frozen. In the lab, samples were enclosed in fine mesh paint-strainer bags and cleaned using a washing machine or nested sieves. Hard parts were cleaned and stored dry. Prey were identified to lowest possible taxon using a dissecting microscope, reference fish bone collections, and published keys. Fish species from fecal samples were placed into 11 non-overlapping prey groups based on taxonomy. Taxonomic resolution (species vs. family or genus) was based on resolution of the prey remains. The category ‘other’ included for all remaining prey species with unweighted occurrence frequencies &lt;5%. Rockfish were included as a prey group despite an overall low occurrence frequency because of conservation interest and the objectives of the present study. To gain insights into seasonal diet variation, the frequencies were weighted by the numbers of seals present in each region in the spring and summer/fall</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: 1
Unknown
region
taxon
freq_of_occurrence
season
theme
None, User defined
region
taxon
No BCO-DMO term
season
featureType
BCO-DMO Standard Parameters
lab_Acevedo
service
Deployment Activity
Bellingham, WA
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
Bellingham, WA
2005-01-01
2008-12-31
Salish Sea, USA and Canada
0
BCO-DMO catalogue of parameters from Summary of prey groups found in harbor seal scat samples from the San Juan Islands analyzed at the Acevedo lab at Western Washington University during 2005-2008 (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/30848.rdf
Name: region
Units: text
Description: <p>Name of the geographical sampling region.</p>
http://lod.bco-dmo.org/id/dataset-parameter/30849.rdf
Name: taxon
Units: text
Description: <p>Name of the prey group.</p>
http://lod.bco-dmo.org/id/dataset-parameter/30850.rdf
Name: freq_of_occurrence
Units: %
Description: <p>Frequency of occurrence (FO). Proportion of the number of occurrences of the fish species out of the total number of scat samples.</p>
http://lod.bco-dmo.org/id/dataset-parameter/31344.rdf
Name: season
Units: text
Description: <p>Sampling season:<br /><br />
Spring = March to early June,<br /><br />
Summer/Fall = late July to September,<br /><br />
Winter = January to February.</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
4741
https://darchive.mblwhoilibrary.org/bitstream/1912/24385/1/dataset-3786_sealpreybyregion__v1.tsv
download
https://doi.org/10.1575/1912/bco-dmo.3786.1
download
onLine
dataset
<p><strong>From Lance et al.:</strong><br />
From 2005 to 2008, fecal samples (scats) were collected seasonally over 3 collection periods: March to early June (‘spring’), late July to September (‘summer/fall’), and January to February (‘winter’). Scats were collected from 23 haul-out locations during daytime low tides. The sites were dispersed throughout the study area, represented various habitat types used by harbor seals, were the largest haul-outs where adequate sample sizes could be collected, and were easily accessible by boat. Two or three collection trips were made each season, with a target sample size of 60 scats per season per region.</p>
<p>Samples were stored frozen. In the lab, samples were enclosed in fine mesh paint-strainer bags and cleaned using a washing machine or nested sieves. Hard parts were cleaned and stored dry. Prey were identified to lowest possible taxon using a dissecting microscope, reference fish bone collections, and published keys. Fish species from fecal samples were placed into 11 non-overlapping prey groups based on taxonomy. Taxonomic resolution (species vs. family or genus) was based on resolution of the prey remains. The category ‘other’ included for all remaining prey species with unweighted occurrence frequencies &lt;5%. Rockfish were included as a prey group despite an overall low occurrence frequency because of conservation interest and the objectives of the present study. To gain insights into seasonal diet variation, the frequencies were weighted by the numbers of seals present in each region in the spring and summer/fall</p>
Specified by the Principal Investigator(s)
<p>BCO-DMO made the following modifications:<br />
- Changed parameter names to conform with BCO-DMO convention.<br />
- Replaced spaces with underscores.</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
Deployment: lab_Acevedo
lab_Acevedo
WWU
laboratory
lab_Acevedo
Alejandro Acevedo-Gutierrez
Western Washington University
WWU
laboratory