| Records |
Author  |
Baker, G.C.; Dekker, R.W.R.J. |
| Title |
Lunar synchrony in the reproduction of the Moluccan Megapode Megapodius wallacei |
Type |
Journal Article |
| Year |
2000 |
Publication |
Ibis |
Abbreviated Journal |
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| Volume |
142 |
Issue |
3 |
Pages |
382-388 |
| Keywords |
Moluccan Megapode; Megapodius wallacei; birds; nesting; reproduction; animals; *Moon |
| Abstract |
The Moluccan Megapode Megapodius wallacei uses heat generated by the sun to incubate its eggs. It buries the eggs deep in the sand of sun-exposed beaches and open sandy areas on islands in the Moluccas, Indonesia. The eggs are laid at night and left to incubate for two to three months without parental care. We present evidence that the Moluccan Megapode exhibits lunar synchrony in the timing of egg-laying, its spatial distribution of egg burrows and in its behaviour at communal nesting grounds. More Moluccan Megapodes visit the nesting grounds on bright nights than during the new moon. Data collected on the spatial distribution and depth of egg burrows also exhibit lunar periodicity. On moonlit nights, the birds excavate burrows in communal groups and spend longer at the nesting ground digging deeper burrows. Lunaphilia and lunar periodicity of reproduction are rarely documented in birds. We discuss possible explanations for these behaviours in the Moluccan Megapode. |
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| ISSN |
0019-1019 |
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| Call Number |
IDA @ john @ |
Serial |
52 |
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| Author |
Rodríguez, A.; Rodríguez, B.; Lucas, M.P. |
| Title |
Trends in numbers of petrels attracted to artificial lights suggest population declines in Tenerife, Canary Islands |
Type |
Journal Article |
| Year |
2012 |
Publication |
Ibis |
Abbreviated Journal |
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| Volume |
154 |
Issue |
1 |
Pages |
167-172 |
| Keywords |
Animals; birds; petrels; Cory's shearwater; Calonectris diomedea; Bulwer's Petrel; Bulweria bulwerii; Macaronesian Shearwater; Puffinus baroli; reproductive strategies |
| Abstract |
The secretive breeding behaviour of petrels makes monitoring their breeding populations challenging. To assess population trends of Cory's Shearwater Calonectris diomedea, Bulwer's Petrel Bulweria bulwerii and Macaronesian Shearwater Puffinus baroli in Tenerife from 1990 to 2010, we used data from rescue campaigns that aim to reduce the mortality of fledgling petrels attracted to artificial lights as proxies for trends in breeding population size. Despite increases in human population size and light pollution, the number of rescued fledglings of Cory's Shearwater and Bulwer's Petrel increased and remained stable, respectively, whereas numbers of rescued Macaronesian Shearwaters sharply declined. In the absence of more accurate population estimates, these results suggest a worrying decline in the Macaronesian Shearwater's breeding population. |
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0019-1019 |
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IDA @ john @ |
Serial |
38 |
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| Author |
Syposz, M.; Gonçalves, F.; Carty, M.; Hoppitt, W.; Manco, F. |
| Title |
Factors influencing Manx Shearwater grounding on the west coast of Scotland |
Type |
Journal Article |
| Year |
2018 |
Publication |
Ibis |
Abbreviated Journal |
Ibis |
| Volume |
160 |
Issue |
4 |
Pages |
846-854 |
| Keywords |
Animals |
| Abstract |
Grounding of thousands of newly fledged petrels and shearwaters (family Procellariidae) in built‐up areas due to artificial light is a global problem. Due to their anatomy these grounded birds find it difficult to take off from built‐up areas and many fall victim to predation, cars, dehydration or starvation. This research investigated a combination of several factors that may influence the number of Manx Shearwater Puffinus puffinus groundings in a coastal village of Scotland located close to a nesting site for this species. A model was developed that used meteorological variables and moon cycle to predict the daily quantity of birds that were recovered on the ground. The model, explaining 46.32% of the variance of the data, revealed how new moon and strong onshore winds influence grounding. To a lesser extent, visibility conditions can also have an effect on grounding probabilities. The analysis presented in this study can improve rescue campaigns of not only Manx Shearwaters but also other species attracted to the light pollution by predicting conditions leading to an increase in the number of groundings. It could also inform local authorities when artificial light intensity needs to be reduced. |
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0019-1019 |
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| Call Number |
GFZ @ kyba @ |
Serial |
2778 |
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