| Autor: |
Rayner, Matt J., Gaskin, Chris P., Taylor, Graeme A., Tennyson, Alan J. D., Fitzgerald, Neil B., Baird, Karen A., Friesen, Megan R., Ross, James, Ismar, Stefanie M. H. |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Popis: |
Between 2014 and 2018 a mark-recapture/ resighting study was conducted to ascertain the size of the population of New Zealand storm petrel (Fregatta maoriana) at their breeding grounds on Hauturu, Little Barrier Island, New Zealand. A total of 415 New Zealand storm petrels were captured and marked with individual colour bands using acoustic playback and night-time spotlighting on Hauturu. Two mark-recapture models were developed using the recaptures of banded birds on land and the at-sea resightings of banded birds attracted to burley on the Hauraki Gulf near Hauturu. The landbased model suggests a current population of 994 (range 446–2,116) individuals whereas the at-sea model suggests an estimate of 1,630 (range 624–3,758) individuals. The discrepancy between these models likely lies in the bias of on-land captures towards juvenile birds constituting >50% of birds caught. We consider the at-sea model most representative of total population size. Logistic population growth models anchored by on-land and at-sea population estimates suggest pre-rat eradication populations of New Zealand storm petrel of 323 and 788 individuals respectively. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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