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Notes on the Vanuatu Megapode Megapodius layardi on Ambrym, Vanuatu

  • Jennifer Bowen (a1)

Summary

The Vanuatu Megapode Megapodius layardi is endemic to Vanuatu (formerly New Hebrides). On the volcanic island of Ambrym it exhibited three different incubation strategies. It incubated its eggs (1) in burrows between decaying roots of trees; (2) in burrows at large communal nesting grounds in volcanically heated soils; and (3) in burrows on sun-exposed beaches. No mounds were found. In a study by the Vanuatu Protected Areas Initiative (VPAI) nesting grounds were mapped to monitor the population. Three communal nesting grounds were surveyed. Two were on promontories and one on a beach. The burrows were classified into three categories: active, probably active and old. The density of active burrows per hectare of the three sites was 82.4 for Promontory A, 43.5 for Promontory B and 10.5 for Buwoma Beach. Additional information of this poorly known species was collected from villagers in the north-west and west of the island. They have noticed a decrease in the numbers of birds and have expressed concern about the future of the species.

Le Mègapode de Vanuatu, Mègapodius layardi, est uniquement originaire de Vanuatu, (dit 'Nouvelles Hebrides' autrefois). Sur l'île volcanique d'Ambrym, il fait preuve de trois stratégies d'incubation différentes. II couve ses oeufs premièrement dans des terriers situés entre les racines pourries des arbres, duexièmement dans des terriers situés dans des grands terrains communaux de nids, et troisièmement dans des terriers situés sur des plages exposées au soleil. Aucan monticule n'est évident. Lors d'une étude par l'lnitiative des Terrains Protégés de Vanuatu (Vanuatu Protected Areas Initiative, VPAI), les terrains de nids furent plannifiés afin d'étudier la population. Trois terrains communaux de nids furent enquêtés. Les terriers furent classifiés en trois catégories; actifs, probablement actifs, et anciens. La densité des terriers actifs par hectare des trois terrains étaient de 82.4 pour le Cap A, 43.5 pour le Cap B, et de 10.5 pour la plage de Buwoma. Des données additionelles pur cet espèce peu connu furent rassemblées des villageois dand le nord ouest et l'ouest de Iîle. Ils ont constaté une diminuation des nombres d'oiseaux et ils ont exprimé leurs soucis vis-à-vis le future de l'espèce.

Wan pijin, nem blong hem Namalau, Megapodius layardi, i stap long Vanuatu nomo (bifo, New Hebrides i nem blong Vanuatu). Long Ambrym, wan aelan wetem volkeno, Namalau i yusum trifala defren fasin long makem nes blong hem so heg blong hem i stap gud nomo; 1) ol i putum heg blong hem nekis rus bio tri wea ol rus i rotin 2) ol i putum heg blong hem wetem plenti narafala Namalau heg long graon wea volkeno i mekem groan i hot, 3) ol i putum heg blong hem insead sanbij wea san i makem i hot. Long Ambrym ol man i no fanem ples wea Namalau putum heg blong hem insaed wanples wea i gat plenti lif mo tri antap graon. Vanuatu Protected Areas Initiative (VPAI) i mekem wan stadi long ples wea ol Namalau i putum heg mo ol i mekem wan map. VPAI i lukum long trifala ples wea Namalau i putum heg. Tufala ples i stap long graon wea i go aot long solwota mo namba tri ples i stap long wan sanbij. I gat trifala defren grup blong ples wea ol i putum heg; niufala, klosap niufala mo olfala. Namba blong nuifala ples wea Namalau i putum heg insaed long wan hectare i 82.4 long pies A, 43.5 long ples B mo 10.5 long Buwoma sanbij. I no gat plenti save blong Namalau mo VPAI toktok plenti wetem ol man blong vilej long notwes mo wes Ambrym. Ol man is e namba blong Namalau i go daon bigwan mo ol i wari long fiuja long Namalau.

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References

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Bregulla, H. L. (1992) Birds of Vanuatu. Shropshire : Antony Nelson.
Collar, N. J., Crosby, M. J., and Stattersfield, A. J. (1994) Birds to watch 2: the world list of threatened birds. Cambridge, U.K.: BirdLife International (BirdLife Conserv. Series no. 4).
Dekker, R. W. R. J. (1990) Conservation and biology of megapodes (Megapodiidae, Galliformes, Aves). Thesis, University of Amsterdam.
Dekker, R. W. R. J. and McGowan, P. J. K. (1995). Megapodes — an action plan for their conservation 1995-1999. Gland, Switzerland: International Council for Conservation of Nature and Natural Resources.
ICPB (1992) Putting biodiversity on the map: priority areas for global conservation. Cambridge U.K.: International Council of Bird Preservation.
Jones, D. N., Dekker, R. W. R. J. and Roselaar, C. S. (1995). The megapodes. Oxford: Oxford University Press.

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Notes on the Vanuatu Megapode Megapodius layardi on Ambrym, Vanuatu

  • Jennifer Bowen (a1)

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