Cite this dataset as
Savage, J.L., Crane. J.M.S., Hemmings, N. (2020). Kākāpō (Strigops habroptilus) egg fertility on Anchor and Whenua Hou islands, New Zealand, 2019 breeding season. NERC Environmental Information Data Centre. (Dataset). https://doi.org/10.5285/cd0e9bc1-bd57-44ae-9fec-2f6239e8726d
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This dataset is available under the terms of the Open Government Licence 
Kākāpō (Strigops habroptilus) egg fertility on Anchor and Whenua Hou islands, New Zealand, 2019 breeding season
This dataset contains information on the fertility and physical characteristics of kākāpō (Strigops habroptilus) eggs laid on Anchor and Whenua Hou islands, New Zealand during the 2018/19 breeding season. Of the 252 total eggs laid, 129 failed to develop; undeveloped eggs were dissected, fixed in formalin, and then inspected using fluorescence microscopy at the University of Sheffield UK. For all eggs, data are provided on mother and clutch of origin, developmental stage reached, and maternal mating behaviour. For dissected undeveloped eggs, additional data include fertilisation status, numbers of sperm visible on the perivitelline layer, egg size and weight, dry eggshell weight, and yolk and albumen weights.
Publication date: 2020-09-18
View record as
Format
Comma-separated values (CSV)
Spatial information
- Study area
-
- Spatial representation type
- Tabular (text)
- Spatial reference system
- WGS 84
Temporal information
- Temporal extent
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2018-12-17 to 2019-12-15
Provenance & quality
All data were collected by the authors or by other staff within the New Zealand Department of Conservation Kākāpō Recovery Team. All data collection was carried out by trained and experienced staff following established conservation management or laboratory protocols.
All data were collected in field or lab notebooks in the first instance, then transcribed to digital spreadsheets. Measurements reported in data files were checked against original notebooks before data deposition. Original notebooks are held at the University of Sheffield, UK, and with the Kākāpō Recovery Team, NZ; the latter also maintains a comprehensive kākāpō database.
See documentation file for further methodological details and data collection roles.
All data were collected in field or lab notebooks in the first instance, then transcribed to digital spreadsheets. Measurements reported in data files were checked against original notebooks before data deposition. Original notebooks are held at the University of Sheffield, UK, and with the Kākāpō Recovery Team, NZ; the latter also maintains a comprehensive kākāpō database.
See documentation file for further methodological details and data collection roles.
Citations
Savage, J.L., Crane, J.M.S., & Hemmings, N. (2020). Low hatching success in the critically endangered kākāpō (Strigops habroptilus) is driven by early embryo mortality not infertility. Cold Spring Harbor Laboratory. https://doi.org/10.1101/2020.09.14.295949
Supplemental information
Website of the New Zealand Department of Conservation Kākāpō Recovery Programme.
Correspondence/contact details
Authors
https://orcid.org/0000-0002-4737-5673
Crane. J.M.S.
Kākāpō Recovery, New Zealand Department of Conservation
Other contacts
- Rights holder
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University of Sheffield
- Custodian
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NERC EDS Environmental Information Data Centreinfo@eidc.ac.uk
- Publisher
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NERC Environmental Information Data Centreinfo@eidc.ac.uk