Dataset Identification:
Resource Abstract:
- description: Sterna antillarum browni) nested at 37 sites along the coast of California. This 7% decrease in breeding population
size from 1994 brings to an end the trend since 1987 of continued growth of the population, and is likely attributable, at
least in part, to the poor fledgling production experienced statewide in 1992. In addition to the drop in pair numbers, heavy
predation pressure at many sites, an apparent shortage of food at two large sites, and a heavy storm in mid-June across the
State, combined with a variety of human-related constraints on tern reproductive success, resulted in the lowest statewide
fledgling-to-pair ratio recorded since fledgling production estimates were incorporated into monitoring protocol (1978). A
minimum of approximately 963-1,174 fledglings was produced, 41% fewer than in 1994, resulting in a statewide fledgling per
pair ratio of 0.37-0.45. As usual, successful and unsuccessful sites were distributed rather evenly throughout the State.
Terns themselves were more unevenly distributed: 50% of the statewide population bred at only five sites (Venice Beach, Santa
Margarita River/North Beach, Mission Bay/Mariner's Point and FAA Island, and Tijuana River/South); inclusion of an additional
four sites (NAS Alameda, Bolsa Chica, Huntington Beach, and Delta Beach/North) accounted for 73% of all breeding pairs, and
the inclusion of two more (Ormond Beach/Edison and Seal Beach) accounted for 81%. The fledglings produced at Santa Margarita
River/North Beach, Mission Bay/Mariner's Point, and Delta Beach/North constituted 33% of the State total; the balance
were distributed relatively evenly among sites.; abstract: Sterna antillarum browni) nested at 37 sites along the coast of
California. This 7% decrease in breeding population size from 1994 brings to an end the trend since 1987 of continued growth
of the population, and is likely attributable, at least in part, to the poor fledgling production experienced statewide in
1992. In addition to the drop in pair numbers, heavy predation pressure at many sites, an apparent shortage of food at two
large sites, and a heavy storm in mid-June across the State, combined with a variety of human-related constraints on tern
reproductive success, resulted in the lowest statewide fledgling-to-pair ratio recorded since fledgling production estimates
were incorporated into monitoring protocol (1978). A minimum of approximately 963-1,174 fledglings was produced, 41% fewer
than in 1994, resulting in a statewide fledgling per pair ratio of 0.37-0.45. As usual, successful and unsuccessful sites
were distributed rather evenly throughout the State. Terns themselves were more unevenly distributed: 50% of the statewide
population bred at only five sites (Venice Beach, Santa Margarita River/North Beach, Mission Bay/Mariner's Point and
FAA Island, and Tijuana River/South); inclusion of an additional four sites (NAS Alameda, Bolsa Chica, Huntington Beach, and
Delta Beach/North) accounted for 73% of all breeding pairs, and the inclusion of two more (Ormond Beach/Edison and Seal Beach)
accounted for 81%. The fledglings produced at Santa Margarita River/North Beach, Mission Bay/Mariner's Point, and Delta
Beach/North constituted 33% of the State total; the balance were distributed relatively evenly among sites.
Citation
- Title California Least Tern Breeding Survey 1995 Season.
-
- creation Date
2018-05-19T22:10:46.368523
Resource language:
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Metadata data stamp:
2018-08-06T20:27:14Z
Resource Maintenance Information
- maintenance or update frequency:
- notes: This metadata record was generated by an xslt transformation from a dc metadata record; Transform by Stephen M. Richard, based
on a transform by Damian Ulbricht. Run on 2018-08-06T20:27:14Z
Metadata contact
-
pointOfContact
- organisation Name
CINERGI Metadata catalog
-
- Contact information
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-
- Address
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- electronic Mail Address cinergi@sdsc.edu
Metadata language
eng
Metadata character set encoding:
utf8
Metadata standard for this record:
ISO 19139 Geographic Information - Metadata - Implementation Specification
standard version:
2007
Metadata record identifier:
urn:dciso:metadataabout:28535450-311f-4092-ae21-caa2a02b7cc2
Metadata record format is ISO19139 XML (MD_Metadata)