PURPOSE
Following the failure of a similar attempted visit in 1992, this was the first of a series of specific island visits to check the status and breeding ecology of the albatrosses in the Chathams over the next 10 years and to compare data with results obtained in the 1970's. Specific tasks on this...
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| Format: | Text |
| Language: | English |
| Published: |
1993
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.220.8035 http://www.doc.govt.nz/upload/documents/science-and-technical/casn70.pdf |
| Summary: | Following the failure of a similar attempted visit in 1992, this was the first of a series of specific island visits to check the status and breeding ecology of the albatrosses in the Chathams over the next 10 years and to compare data with results obtained in the 1970's. Specific tasks on this visit related to the Northern Bullers Mollymawk (Diomedea bulleri sp.), Northern Royal albatross (Diomedea epomophora sanfordi), and Northern Giant Petrel (Macronectes halli) and included gathering nesting distribution and density data to attempt a more reliable population estimate of the Bullers; comparative data on the length of incubation stints and sizes of nests; times of day when non-breeding birds were most prevalent; relevant taxonomic data relating to bill colour for the revision of the species status of this form; collections of nest density and nest structure data for Royals as part of an investigation into the high nesting failures which have been recorded in recent years from air photographs; comparative measurements of shell thickness in failed eggs; verification of optimal time of day for air photographs; data on nest failures; establishing the breeding distribution of the Giant petrels plus likely numbers and nesting success; other bird observations as the situation arose. |
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