28093 AFSC/NMML/CCEP: Channel Islands Pinniped Census Data Set Published / External 23110 California Current Ecosystems Program Project In Work 2016 The National Marine Mammal Laboratories' California Current Ecosystem Program (AFSC/NOAA) initiated and maintains census programs for California sea lions (Zalophus californianus) and northern fur seals (Callorhinus ursinus) at San Miguel and San Nicolas Islands, California. The program documents annual pup births, pup mortality, and temporal patterns in adult and juvenile presence at San Miguel Island. For both species, the database contains field data on the annual number of live pups and dead pups by location. At San Miguel Island, daily counts of adults, pups, and juveniles in a sample area are also available. The data are used to describe population trends and changes in land resource use among the species. The census data are used in models to estimate the size of the populations based on pup production as an index of the population as whole. These data contribute to the NMFS Stock Assessment Reports that are used to monitor the status of marine mammal species under the Marine Mammal Protection Act of 1972. Cite data as: Melin, S. R., DeLong, R. L., Orr, A. J., Laake, J. L. 2016. California sea lion and northern fur seal censuses conducted at Channel Islands, California by Alaska Fisheries Science Center from 1969-07-31 to 2015-08-08 (NCEI Accession 0145165). NOAA National Centers for Environmental Information. Theme California sea lion Theme Census Theme Live-pup counts Theme Northern fur seal Theme Pinniped Theme Population Theme Pup mortality counts Theme Stock Assessment Spatial California Spatial California Channel Islands Spatial San Miguel Island Spatial San Nicolas Island Alaska Fisheries Science Center Seattle WA USA Data Set CSV Files Annually Table (digital) Tables include information (counts) of California sea lions and northern fur seals during daily censuses (all age/sex classes) and for yearly production estimates (pups only). See "Child Items" for more detailed information. The user is responsible for the results of any application of this data for other than its intended purpose. NOAA denies liability if the data are misused. Applications or inferences derived from the data should be carefully considered for accuracy. Whereas every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. Alaska Fisheries Science Center N/A N/A N/A 30994 NCEI_CuProduction Published / External In Work NA Loaded by FGDC Metadata Uploader, batch 8216, 03-02-2016 20:37 NA Island Unknown No No Active NA LiveCountDate Unknown No No Active Mean date of counts. Counts are conducted over a series of days at both islands. Area Unknown No No Active Area where count occurred. Mainland = island mainland; Castle Rock = offshore island of San Miguel Island. Year Unknown No No Active Year of count. MortalityRateAtLiveCount Unknown No No Active NA TotalLiveCountByYear Unknown No No Active The average number of pups counted. 30995 NCEI_ZcProduction Published / External In Work NA Loaded by FGDC Metadata Uploader, batch 8216, 03-02-2016 20:37 NA Island Unknown No No Active NA LiveCountDate Unknown No No Active Mean date of counts. Counts are conducted over a series of days at both islands. Area Unknown No No Active Area where count occurred. Mainland = island mainland; Castle Rock = offshore island of San Miguel Island. Year Unknown No No Active Year of count. MortalityRateAtLiveCount Unknown No No Active NA TotalLiveCountByYear Unknown No No Active The average number of pups counted. 30997 NCEI_ Zc Daily Census EACS Published / External In Work NA Loaded by FGDC Metadata Uploader, batch 8220, 03-02-2016 20:42 NA pupyear Unknown No No Active Reproductive year for census (15 May - 14 May) censusdate Unknown No No Active Date of census MM/DD/YY censustime Unknown No No Active Start time of census in military time (1:00 pm = 1300 hr) area Unknown No No Active Area of census EACS = East Adams Cove Study Area which is an arbitrarily defined area within Adams Cove TADMwoF Unknown No No Active Number of territorial males associated with females TADMwF Unknown No No Active Number of territorial males without females TotalTADM Unknown No No Active Total number of territorial males TotalIdleMales Unknown No No Active Total number of idle males (Large Adult, Small Adult, and Sub Adult) TotalADF Unknown No No Active Total number of adult females livepups Unknown No No Active Total number of live pups observer Unknown No No Active Observer initials or name censusconditions Unknown No No Active Conditions for counting Poor, Good, Fair or Excellent Weather Conditions and Comments Unknown No No Active General comments about weather or distribution or count Photos Unknown No No Active Photos of census area taken at time of census Mirounga Unknown No No Active Number of northern elephant seals present in census area Callorhinus Unknown No No Active Number of northern fur seals present in census area IdleADM Unknown No No Active Number of idle Adult or Small adult males SAM Unknown No No Active Number of sub adult males Idle males Unknown No No Active Total number of idle males (all groups combined) censustype Unknown No No Active NA visibility Unknown No No Active Visibility for seeing animals Poor, Fair, Good, Excellent wind Unknown No No Active Wind speed and direction (e.g. NW15 = northwest 15 mph) temp Unknown No No Active Temperature if available ceiling Unknown No No Active OC = overcast, CL = Clear, PC = Partial Clouds, FG = Fog 30998 NCEI_Cu Daily Census Published / External In Work NA Loaded by FGDC Metadata Uploader, batch 8220, 03-02-2016 20:42 NA Year Unknown No No Active Year data collected. Date Unknown No No Active Date of census MM/DD/YYYY Time Unknown No No Active Start time of census in military time (e.g. 1:00 pm = 1300 hr) Area Unknown No No Active NA TLADMwF Unknown No No Active Number of territorial males holding territory with females TLADMwoF Unknown No No Active Number of territorial males holding territory without females TotalTLADM Unknown No No Active Total number of territorial males TotalIdleMales Unknown No No Active NA TotalADF Unknown No No Active Number of adult females Livepups Unknown No No Active Number of live pups CensusConditions Unknown No No Active Weather or distribution conditions for census (Poor, Fair, Good, Excellent) Weather Conditions/Comments Unknown No No Active Comments on weather or distribution or count observer Unknown No No Active Initials of observer Photos Unknown No No Active Photos taken of census area (Y = Yes, N = No) censustype Unknown No No Active NA wind Unknown No No Active Wind direction and speed (NW15 = northwest at 15 mph) temp Unknown No No Active Temperature if available ceiling Unknown No No Active Overcast = OC, Clear = CL, Fog = FG visibility Unknown No No Active visibility for counting and seeing animals (Poor, Fair, Good, Excellent) Data Set Credit 2015 Person Delong, Robert robert.delong@noaa.gov Data Set Credit 2015 Person Laake, Jeff jeff.laake@noaa.gov Data Set Credit 2015 Person Melin, Sharon sharon.melin@noaa.gov https://orcid.org/0000-0001-5594-4883 Data Steward 2015 Person Melin, Sharon sharon.melin@noaa.gov https://orcid.org/0000-0001-5594-4883 Distributor 2015 Organization NOAA National Centers for Environmental Information NCEI ncei.info@noaa.gov https://ror.org/04r0wrp59 https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. Online Resource https://www.nodc.noaa.gov/ Metadata Contact 2015 Person Orr, Tony tony.orr@noaa.gov Point of Contact 2015 Person Melin, Sharon sharon.melin@noaa.gov https://orcid.org/0000-0001-5594-4883 Point of Contact 2015 Person Delong, Robert robert.delong@noaa.gov -120.5 -119 34.11 33 San Miguel and San Nicolas Islands, of the California Channel Islands Continuing 1969 Unclassified None. None. The dataset is archived with the NOAA National Centers for Environmental Information (NCEI). Acknowledgement of NOAA/NMFS/AFSC, as the source from which these data were obtained in any publications and/or other representations of these data is suggested. Communication and collaboration with dataset authors is strongly encouraged prior to use. The dataset is available for download via the NCEI Ocean Archive System at http://accession.nodc.noaa.gov/0145165. There are no legal restrictions on access to the data. They reside in public domain and can be freely distributed. User must read and fully comprehend the metadata prior to use. Applications or inferences derived from the data should be carefully considered for accuracy. Acknowledgement of NOAA/NMFS/AFSC, as the source from which these data were obtained in any publications and/or other representations of these, data is suggested. Data should be cited as: Melin, S. R., DeLong, R. L., Orr, A. J., Laake, J. L. 2016. California sea lion and northern fur seal censuses conducted at Channel Islands, California by Alaska Fisheries Science Center from 1969-07-31 to 2015-08-08 (NCEI Accession 0145165). NOAA National Centers for Environmental Information. None. Metadata are subject to revision at any time and information within the metadata record should not be cited without author consent. Whereas every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.nodc:0145165 0145165 NODC/NOAA National Centers for Environmental Information (NCEI) web page with links to data download sites. https://www.afsc.noaa.gov/nmml/species/species_nfs.php Online Resource PDF Northern fur seal web page for the National Marine Mammal Laboratory/Alaska Fisheries Science Center/NOAA. Site contains several links including Fur Seal Investigations and Stock Assessment Reports. Count data are summarized biennially in the Fur Seal Investigations. MS Access At San Miguel Island, live pup surveys include the entire colony. Pup mortality surveys do not include areas outside the Point Bennett rookery on the west end of the island. Northern fur seal pup mortality surveys are conducted regularly only in the west half of Adams Cove; the east half is surveyed after 1 August to avoid disturbance to breeding California sea lions. A few years are missing data for Castle Rock, a small offshore colony, because of weather that prevented landing on the rock for counts. At San Nicolas Island, live and dead pup surveys are conducted only on the southwest end of the island and do not represent the entire San Nicolas colony. Until 1991, only one or two counts of dead pups were conducted after the live pup count in most years. After 1991, the current methodology of multiple surveys every 15 days was employed. Point Bennett Point (2007) and Northeast Point (2010) were dropped from the pup mortality sample area because of seabird nesting and access problems. Data are edited in the field and entered into the database by the person who collected the data. The data managers make sure all the data are entered in the same format and check and correct for inconsistencies in the data. No 0 No No Yes Unknown Data not automatically processed NCEI-MD Unknown IT Security and Contingency Plan for the system establishes procedures and applies to the functions, operations, and resources necessary to recover and restore data as hosted in the Western Regional Support Center in Seattle, Washington, following a disruption. Pup Birth Census: 1. All pups are counted by two or more observers that walk through the colony, along bluffs or from a blind counting all live pups observed. Counters use hand tallies and record their counts individually in their data books. Observers do not discuss individual counts while in the field. 2. For California sea lions, the entire colony at San Miguel is counted over 4-5 days; at San Nicolas Island a sample area is counted over 2 days. For northern fur seals, all pups are counted on a single survey. When counts span several days, distinct break points in the topography (usually headlands or large breaks in the distribution of animals such that is unlikely that adjacent areas mix) are used to provide markers to avoid counting the same pups on different days. 3. Counts are entered into the Microsoft Access database each night and error checked by the observers. When the census is complete, the average number of pups is computed for the colony or sample area. Pup Mortality Survey: 1. Pup mortality surveys for California sea lions are conducted in sample areas on San Miguel and San Nicolas Islands. At San Miguel Island, the area is the Point Bennett rookery located on the west end of the island and represents about 45% of the total population. At San Nicolas Island, the area includes the southwest end of the island and represents about 33% of the population. Pup mortality surveys for northern fur seals are conducted in Adams Cove on the mainland of San Miguel throughout the reproductive season and only once on Castle Rock. 2. At San Miguel Island, pup mortality surveys are conducted at 10-15 day intervals beginning the first week of July and ending the middle of August. Surveys conducted after the end of the reproductive season may be at 15 day intervals or up to 1-2 months. At Castle Rock, a single mortality survey is conducted at the same time as the live pup survey for each species. At San Nicolas Island, one to three surveys are conducted over the reproductive season. 3. When surveys are conducted over the season, observers search the sample areas and collect and count each dead pup they encounter. The data includes: island, date, area on the island, species, beach location, substrate type, and carcass condition. The carcasses are then stacked into piles throughout the rookery to avoid counting individual carcasses more than once. In a few years, carcasses were tagged with individual numbers for a mark-recapture study to estimate disappearance rates of carcasses. Each carcass was tagged with two uniquely numbered tags and left on the beach. On the subsequent surveys, the tags and carcass condition were recorded when tagged carcasses were encountered creating a capture history for each carcass over the season. 4. Counts are entered into the Microsoft Access database and edited by the observer that collected the data. The total number of dead pups over the season for each species at each colony provides an index of the annual pup mortality. 30997 Entity 30998 Entity 30994 Entity 30995 Entity gov.noaa.nmfs.inport:28093 Tony Orr 2015-10-19T20:06:12 SysAdmin InPortAdmin 2026-03-04T19:17:25 2018-11-27 Alaska Fisheries Science Center AFSC 7600 Sand Point Way N.E., Building 4 Seattle WA 98115 USA https://www.afsc.noaa.gov 0700-1700 Pacific Time 1001 Public No No 2018-11-27 1 Year 2019-11-27