Mobile Menu Open Mobile Menu Close

Re-laying by Hutton’s shearwaters (Puffinus huttoni) at Te Rae o Atiu, Kaikōura Peninsula, New Zealand

  • Publication Type

    Journal Article

  • Publication Year

    2024

  • Author(s)

    Lindsay K. Rowe, Graeme Taylor, Ted Howard

  • Journal Name

    Notornis

  • Volume, Issue

    71, 1

  • Pagination

    214-224

  • Article Type

    Paper

Keywords

Puffinus huttoni, Hutton’s shearwater, Te Rae o Atiu, Kaikōura Peninsula, New Zealand, breeding, re-laying, female-female pairs


Re-laying by Hutton’s shearwaters (Puffinus huttoni) at Te Rae o Atiu, Kaikōura Peninsula, New Zealand

Notornis, 71 (1), 214-224

Lindsay K. Rowe, Graeme Taylor, Ted Howard (2024)

Article Type: Paper

Attachment


Download

Abstract: Observations were made of the Nationally Vulnerable Hutton’s shearwater (Puffinus huttoni) breeding at Te Rae o Atiu, Kaikōura Peninsula (42.429°S, 173.703°E), New Zealand, a new colony established by translocations where birds breed in nestboxes. Over 12 seasons there were 245 eggs laid, including seven instances of two eggs laid as separate clutches in one nestbox during the same season. Nestbox inspections, usually undertaken weekly, provided evidence of egg laying date. Bird attendance at the nestboxes was also obtained from implanted passive integrated transponders that triggered a reader and datalogger. There is evidence for birds re-laying an egg after the first egg failed for three separate events, and a fourth was a possibility. In three other events, it appears more likely that two different birds laid the eggs, two as female-female pairings or simply egg dumping by an unpaired female; the third event was inconclusive. Only one of the 14 eggs from two-egg nests hatched, and the chick fledged successfully, about 10 days later than any other chick recorded at this colony. This fledging date was similar to the last date for fallout birds from the natural, mountain colonies, and suggests that re-laying may be a natural consequence of early egg failures in this species.