Mobile Menu Open Mobile Menu Close
back back back

Publications Archive

Search by:

Diet of kereru (Hemiphaga novaeseelandiae) in a rural-urban landscape, Banks Peninsula, New Zealand

Notornis, 55 (4), 173-183

K.L. Campbell; M.H. Schotborgh; K.J. Wilson; S.C. Ogilvie (2008)

Article Type: Paper

The diet of 30 radio-tagged kereru (Hemiphaga novaeseelandiae) was studied at 4 sites on Banks Peninsula, New Zealand, from Feb 2004 to Feb 2006, in 2 main habitat types: 1) highly modified rural-urban habitats where introduced plant species were common and remnants of native forest small, and 2) a habitat containing relatively few introduced species with a large area of regenerating native forest (Hinewai Reserve). Kereru at Hinewai had the most varied diet and ate a higher proportion of native plant species (82%) than those at rural-urban sites where only half the diet comprised native species. At all sites, native fruits were the most frequently eaten foods during mid-summer and autumn. Foliage and flowers of introduced plants – tree lucerne (Chamaecytisus palmensis) and fruit trees (Prunus and Malus spp.) at rural-urban sites, and broom (Cytisus scoparius) at Hinewai – were most frequently eaten prior to the breeding season. Kereru at all sites made multiple breeding attempts. This suggested that food was not limiting and foliage of introduced species can allow kereru to breed successfully. Food sources for kereru on Banks Peninsula, and potentially in similar habitats throughout New Zealand, could be improved based on the list of food species compiled during this study. Advantages and disadvantages of using introduced plant species for enhancement of food sources are discussed.

The recovering population of the Chatham Island oystercatcher (Haematopus chathamensis)

Notornis, 55 (1), 20-31

P.J. Moore (2008)

Article Type: Paper

Historical records of the Chatham Island oystercatcher (Haematopus chathamensis) suggested a sparse and small population. In 1970, there may have been as few as 52 birds, but this apparently increased to 112 in 1987 and 144 in 1998. Intensive predator control and nest and habitat management has since boosted productivity and recruitment of oystercatchers along the northern Chatham Island (Rekohu) coastline and resulted in a rapid increase in total numbers; by 2004 there were 316

Antipodean wandering albatrosses (Diomedea antipodensis) colonising the Chatham Islands

Notornis, 55 (2), 89-95

C.M. Miskelly; N. McNally; R. Seymour; D. Gregory-Hunt; J. Lanauze (2008)

Article Type: Paper

Large albatrosses, subsequently identified as Antipodean wandering albatrosses (Diomedea antipodensis), began prospecting for nest sites inland from the south-western coast of Chatham Island about 1998. The 1st egg was laid about the end of Mar 2003. What is presumed to be the same female laid an egg nearby in Feb 2004 and 2005. Although the 2004 egg hatched, each of these 3 breeding attempts failed. A subadult male Antipodean wandering albatross was found in Waipaua Scenic Reserve on Pitt Island in May 2002, and what may have been the same bird was ashore at the same site in Jan 2004. An egg was found at this site in Apr 2004 and the resulting chick fledged in Jan 2005. What is presumed to have been a different pair was found with an egg on Mount Hakepa, Pitt I, in early Jan 2006; their egg hatched in Apr 2006, and the chick fledged about 7 Jan 2007. What is presumed to be the same pair also nested successfully at the Mount Hakepa site in 2008/2009, with the chick fledging on 6 Jan 2009. These 6 breeding attempts (3 successful) by perhaps 3 different pairs at widely spaced sites on the Chatham Islands are the 1st records of Antipodean wandering albatrosses breeding away from the Antipodes Is and Campbell I.

Hybridisation between mallard (Anas platyrhynchos) and grey duck (A. superciliosa) on Lord Howe Island and management options

Notornis, 55 (1), 1-7

J.P. Tracey; B.S. Lukins; C. Haselden (2008)

Article Type: Paper

Introduced mallards (Anas platyrhynchos) occur on many islands of the South Pacific, where they hybridise with the resident grey duck (A. superciliosa). In October 2007, we conducted systematic surveys of Lord Howe Island to estimate the abundance and distribution of grey ducks, mallards, and their hybrids. Hybrids were common in areas of high public use, particularly where there was mown or grazed grass. Phenotypic characteristics suggest that mallards are now dominant and have supplanted the native grey duck, with 81% of birds classified as mallard or mallard-like hybrids, 17% as intermediate hybrids and only 2% as grey duck-like hybrids. No pure grey duck were observed. These hybrids pose direct and indirect economic, social and environmental impacts to Lord Howe Island. A management program to remove mallards using trapping, shooting and opportunistic capture by hand was conducted in October 2007. Standardised indices of duck abundance before and after management indicates that the total population was reduced by 71.7%. Eradication of mallard and hybrids from Lord Howe Island is considered achievable with a program of education, monitoring, and continued control to prevent re-establishment.
  1. Pages:
  3. 1
  4. ...
  5. 32
  6. 33
  7. 34
  8. 35
  9. 36
  10. 37
  11. 38
  12. ...
  13. 242