ERDDAP > info > bcodmo_dataset_3786

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	FGDC, ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
		data			files	public	[seal_prey_by_region] - 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) (Responses of Seals and Sea Lions to Increased Rockfish Density)		I   M	background			BCO-DMO	bcodmo_dataset_3786

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	access_formats	String	.htmlTable,.csv,.json,.mat,.nc,.tsv
attribute	NC_GLOBAL	acquisition_description	String	From Lance et al.: From 2005 to 2008, fecal samples (scats) were collected seasonally over 3 collection periods: March to early June (\u2018spring\u2019), late July to September (\u2018summer/fall\u2019), and January to February (\u2018winter\u2019). 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. 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 \u2018other\u2019 included for all remaining prey species with unweighted occurrence frequencies <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
attribute	NC_GLOBAL	awards_0_award_nid	String	54955
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-0550443
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0550443
attribute	NC_GLOBAL	awards_0_funder_name	String	NSF Division of Ocean Sciences
attribute	NC_GLOBAL	awards_0_funding_acronym	String	NSF OCE
attribute	NC_GLOBAL	awards_0_funding_source_nid	String	355
attribute	NC_GLOBAL	awards_0_program_manager	String	David L. Garrison
attribute	NC_GLOBAL	awards_0_program_manager_nid	String	50534
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	Summary of prey found in seal scat from the San Juan Islands Lead PI: Alejandro Acevedo-Gutierrez Version: 12 Dec 2012
attribute	NC_GLOBAL	Conventions	String	COARDS, CF-1.6, ACDD-1.3
attribute	NC_GLOBAL	creator_email	String	info at bco-dmo.org
attribute	NC_GLOBAL	creator_name	String	BCO-DMO
attribute	NC_GLOBAL	creator_type	String	institution
attribute	NC_GLOBAL	creator_url	String	https://www.bco-dmo.org/
attribute	NC_GLOBAL	data_source	String	extract_data_as_tsv version 2.3 19 Dec 2019
attribute	NC_GLOBAL	date_created	String	2012-11-20T18:01:07Z
attribute	NC_GLOBAL	date_modified	String	2019-08-01T18:56:19Z
attribute	NC_GLOBAL	defaultDataQuery	String	&amp;time&lt;now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.3786.1
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/3786
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	keywords	String	bco, bco-dmo, biological, chemical, data, dataset, dmo, erddap, freq, freq_of_occurrence, management, occurrence, oceanography, office, preliminary, region, season, taxon
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/3786/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/3786
attribute	NC_GLOBAL	param_mapping	String	{'3786': {}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/3786/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	Western Washington University
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	WWU
attribute	NC_GLOBAL	people_0_person_name	String	Alejandro Acevedo-Gutierrez
attribute	NC_GLOBAL	people_0_person_nid	String	51487
attribute	NC_GLOBAL	people_0_role	String	Lead Principal Investigator
attribute	NC_GLOBAL	people_0_role_type	String	originator
attribute	NC_GLOBAL	people_1_affiliation	String	United States Geological Survey
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	USGS
attribute	NC_GLOBAL	people_1_person_name	String	Jeffrey F Bromaghin
attribute	NC_GLOBAL	people_1_person_nid	String	51491
attribute	NC_GLOBAL	people_1_role	String	Co-Principal Investigator
attribute	NC_GLOBAL	people_1_role_type	String	originator
attribute	NC_GLOBAL	people_2_affiliation	String	Washington Department of Fish and Wildlife
attribute	NC_GLOBAL	people_2_person_name	String	Steven J Jeffries
attribute	NC_GLOBAL	people_2_person_nid	String	51489
attribute	NC_GLOBAL	people_2_role	String	Co-Principal Investigator
attribute	NC_GLOBAL	people_2_role_type	String	originator
attribute	NC_GLOBAL	people_3_affiliation	String	University of Alaska, Anchorage
attribute	NC_GLOBAL	people_3_affiliation_acronym	String	UAA
attribute	NC_GLOBAL	people_3_person_name	String	John M Kennish
attribute	NC_GLOBAL	people_3_person_nid	String	51490
attribute	NC_GLOBAL	people_3_role	String	Co-Principal Investigator
attribute	NC_GLOBAL	people_3_role_type	String	originator
attribute	NC_GLOBAL	people_4_affiliation	String	Washington Department of Fish and Wildlife
attribute	NC_GLOBAL	people_4_person_name	String	Monique M Lance
attribute	NC_GLOBAL	people_4_person_nid	String	51488
attribute	NC_GLOBAL	people_4_role	String	Co-Principal Investigator
attribute	NC_GLOBAL	people_4_role_type	String	originator
attribute	NC_GLOBAL	people_5_affiliation	String	National Marine Fisheries Service
attribute	NC_GLOBAL	people_5_affiliation_acronym	String	NMFS
attribute	NC_GLOBAL	people_5_person_name	String	Philip S Levin
attribute	NC_GLOBAL	people_5_person_nid	String	51492
attribute	NC_GLOBAL	people_5_role	String	Co-Principal Investigator
attribute	NC_GLOBAL	people_5_role_type	String	originator
attribute	NC_GLOBAL	people_6_affiliation	String	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_6_affiliation_acronym	String	WHOI BCO-DMO
attribute	NC_GLOBAL	people_6_person_name	String	Shannon Rauch
attribute	NC_GLOBAL	people_6_person_nid	String	51498
attribute	NC_GLOBAL	people_6_role	String	BCO-DMO Data Manager
attribute	NC_GLOBAL	people_6_role_type	String	related
attribute	NC_GLOBAL	project	String	Seal_response_to_prey
attribute	NC_GLOBAL	projects_0_acronym	String	Seal_response_to_prey
attribute	NC_GLOBAL	projects_0_description	String	From NSF proposal: 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. 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. Hypotheses: 1) Harbor seals and other pinniped species show aggregative responses to changes in prey density. Hence, their abundance will increase with fish density. 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. 3) Predation by harbor seals and other pinniped species is sufficiently intense that it impedes recovery of depleted fish populations. Objectives: 1) Quantify the number of harbor seals and other pinniped species in relation to rockfish density and other environmental (confounding) factors. 2) Estimate the consumption rate of harbor seals and other pinniped species in relation to rockfish density and other prey species. 3) Correlatively estimate the influence of predation by harbor seals and other pinniped species on survivorship and population size of rockfish. Publications resulting from this NSF award:Bjorland, 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: 10.3354/meps11230Bromaghin, 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: 10.7755/FB.111.1.2Buzzell, 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: 10.1578/AM.40.2.2014.150Howard, 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: 10.7755/FB.111.1.3Lance, 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:10.3354/meps09880Luxa, K. & Acevedo-Gutierrez, A. 2013. Food habits of harbor seals (Phoca vitulina) in two estuaries in the central Salish Sea. Aquatic Mammals 39: 10- 22. DOI: 10.1578/AM.39.1.2013.10Peterson, S., Lance, M. M., Jeffries, S. J. & Acevedo-Gutierrez, A. 2012. Long distance movements and disjunct spatial use of harbor seals (Phoca vitulina) in the inland waters of the Pacific Northwest. PLoS ONE 7: e39046. DOI: 10.1371/journal.pone.0039046Thomas, 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: 10.3354/meps09370Ward, 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: 10.1111/j.1755-263X.2011.00210.xWilson, K.2, Lance, M., Jeffries, S. & Acevedo-Gutiérrez, A. 2014. Fine-scale variability in harbor seal foraging behavior. PLoS ONE 9: e92838. DOI: 10.1371/journal.pone.0092838.
attribute	NC_GLOBAL	projects_0_end_date	String	2012-03
attribute	NC_GLOBAL	projects_0_geolocation	String	Salish Sea, USA and Canada
attribute	NC_GLOBAL	projects_0_name	String	Responses of Seals and Sea Lions to Increased Rockfish Density
attribute	NC_GLOBAL	projects_0_project_nid	String	2205
attribute	NC_GLOBAL	projects_0_project_website	String	http://biol.wwu.edu/mbel/?page=research
attribute	NC_GLOBAL	projects_0_start_date	String	2006-04
attribute	NC_GLOBAL	publisher_name	String	Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute	NC_GLOBAL	publisher_type	String	institution
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	summary	String	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.
attribute	NC_GLOBAL	title	String	[seal_prey_by_region] - 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) (Responses of Seals and Sea Lions to Increased Rockfish Density)
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	taxon		String
attribute	taxon	bcodmo_name	String	taxon
attribute	taxon	description	String	Name of the prey group.
attribute	taxon	long_name	String	Taxon
attribute	taxon	units	String	text
variable	region		String
attribute	region	bcodmo_name	String	region
attribute	region	description	String	Name of the geographical sampling region.
attribute	region	long_name	String	Region
attribute	region	units	String	text
variable	season		String
attribute	season	bcodmo_name	String	season
attribute	season	description	String	Sampling season: Spring = March to early June, Summer/Fall = late July to September, Winter = January to February.
attribute	season	long_name	String	Season
attribute	season	units	String	text
variable	freq_of_occurrence		float
attribute	freq_of_occurrence	_FillValue	float	NaN
attribute	freq_of_occurrence	actual_range	float	0.0, 90.1468
attribute	freq_of_occurrence	bcodmo_name	String	unknown
attribute	freq_of_occurrence	description	String	Frequency of occurrence (FO). Proportion of the number of occurrences of the fish species out of the total number of scat samples.
attribute	freq_of_occurrence	long_name	String	Freq Of Occurrence
attribute	freq_of_occurrence	units	String	%

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.