Population size, distribution and productivity of Masked Boobies on mainland St Helena June 2013-June 2014

Masked boobies (Sula dactylatra) on mainland St Helena between Lot's Wife and Castle Rock Point area of Sandy Bay were mapped and behaviour identified monthly between June 2013 to May 2014. Minimum populations estimate (MPE) was estimated a to be 370 masked boobies, breeding success and distribution were also estimated. Csv files contain the location (lat/long) and behaviour of all masked boobies on the colony monthly.

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Additional Info

Field	Value
Last Updated	October 20, 2023, 16:15 (CEST)
Created	October 20, 2023, 16:15 (CEST)
Region	Saint Helena
Language	eng
Topic Category	Biota; flora and/or fauna in natural environment
Temporal Extent Start	2013
Temporal Extent End	2014
Dataset Reference Date	2014
Lineage	Lot's Wife and Castle Rock Point area of Sandy Bay, St Helena Island were visited monthly from June 2013 to June 2014. Data was collected using a combination of mark-recapture techniques, scan counts, ground counts and digitisation of spatial data. Breeding masked boobies and their chicks were targeted for ringing. Daily egg and chick survival rates were calculated following Mayfield (1975) and their standard errors following Johnson (1979). A minimum population estimate (MPE) were calculated monthly to allow for incomplete habitat coverage in inaccessible and nonvisible areas, also undetected birds during the period of a monthly count. The raw data is held with EMD
Spatial Reference System	EPSG:4326
Responsible Organisation Name	Hidden (personal data protection)
Contact Mail Address	Hidden (personal data protection)
Responsible Party Role	Hidden (personal data protection)
Access Limitations	Open access
Use Constraints	Open
Resource Reference	Open but Please acknowledge data source as: St Helena Government, Environmental Managament Division, Marine Conservation Section. Oceanographic influences on the St Helena pelagic ecosystem. A Darwin PLUS Initiative project funded by the UK government.
Data Format	csv, accdb, dbf, prj, qpj, shp, shx
Update Frequency	not planned - survey completed
Accuracy	GPS locations are divided into either exact or estimated from observation and maps.
Resource Type	data series, database, nonGeographicalDataset,
Original Title	Hidden (internal use only)
Metadata Date	2022/10/10
Metadata Point of Contact	data.manager@sainthelena.gov.sh
Unique Resource ID	SH-SHG-338