AFSC/NMML/CCEP: Channel Islands Pinniped Census
Access & Use Information
Downloads & Resources
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0145165
NODC/NOAA National Centers for Environmental Information (NCEI) web page with...
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Full Metadata Record
View the complete metadata record on InPort for more information about this...
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Citation URL
Northern fur seal web page for the National Marine Mammal Laboratory/Alaska...
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Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19....
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NOAA Data Management Plan (DMP)PDF
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Dates
Metadata Date | October 3, 2024 |
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Metadata Created Date | October 28, 2022 |
Metadata Updated Date | November 1, 2024 |
Reference Date(s) | 2016 (publication) |
Frequency Of Update | annually |
Metadata Source
- ISO-19139 ISO-19139 Metadata
Harvested from NMFS AFSC
Additional Metadata
Resource Type | Dataset |
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Metadata Date | October 3, 2024 |
Metadata Created Date | October 28, 2022 |
Metadata Updated Date | November 1, 2024 |
Reference Date(s) | 2016 (publication) |
Responsible Party | (Point of Contact, Custodian) |
Contact Email | |
Guid | gov.noaa.nmfs.inport:28093 |
Access Constraints | Cite As: Alaska Fisheries Science Center, [Date of Access]: AFSC/NMML/CCEP: Channel Islands Pinniped Census [Data Date Range], https://www.fisheries.noaa.gov/inport/item/28093., Access Constraints: There are no legal restrictions on access to the data. They reside in public domain and can be freely distributed., Use Constraints: 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., Distribution Liability: 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. |
Bbox East Long | -119 |
Bbox North Lat | 34.11 |
Bbox South Lat | 33 |
Bbox West Long | -120.5 |
Coupled Resource | |
Frequency Of Update | annually |
Harvest Object Id | 3c7e3c5f-d376-46d9-a32e-143303c1de9f |
Harvest Source Id | 26a29bb9-50b0-47fd-920b-edc74aa6ec76 |
Harvest Source Title | NMFS AFSC |
Licence | NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. |
Lineage | 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. |
Metadata Language | eng |
Metadata Type | geospatial |
Old Spatial | {"type": "Polygon", "coordinates": [[[-120.5, 33.0], [-119.0, 33.0], [-119.0, 34.11], [-120.5, 34.11], [-120.5, 33.0]]]} |
Progress | underDevelopment |
Spatial Data Service Type | |
Spatial Reference System | |
Spatial Harvester | True |
Temporal Extent Begin | 1969 |
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