Published January 31, 2019
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Table 3 in A comparison of image and observer based aerial surveys of narwhal
Authors/Creators
- 1. Shell Global Solutions International B. V., Kesslerpark 1, 2288 GS, Rijswijk, the Netherlands and Groningen Institute for Evolutionary Life Sciences, University of Groningen, PO Box 11103, 9700 CC Groningen, the Netherlands;
- 2. Greenland Institute of Natural Resources, ℅ Greenland Representation, Strandgade 91, 2, DK- 1401 KØbenhavn K, Denmark;
- 3. LGL Alaska Research Associates, Inc., 2000 West International Airport Road, STE C- 1, Anchorage, Alaska 99502, U. S. A.;
- 4. LGL Limited environmental research associates, 22 Fisher Street, PO Box 280, King City, Ontario L 7 B 1 A 6, Canada;
- 5. Greenland Institute of Natural Resources, ℅ Greenland Representation, Strandgade 91, 2, DK- 1401 KØbenhavn K, Denmark.
Description
Table 3. AIC values after fitting explanatory variables to the DS and MR models. The final model chosen, Model 1, is given in bold and ΔAIC indicates the difference between the chosen model and the specified model. HN indicates a half-normal form and HR indicates a hazard-rate form for the DS model. The explanatory variables are perpendicular distance (D), group size (S), group size as a factor with three classes (1, 2–5, and ≥ 6 narwhals) (S3), Beaufort (BF), side of airplane (SP), observer pair (O), and time to next observation ≤ 10 s (T). Appendix S3 provides an overview of all the models that were developed.
| Model | DS model | MR model | No. of parameters | AIC | ΔAIC |
|---|---|---|---|---|---|
| 1 | HN: D + BF | D + O + S 3 | 5 | 1,330.91 | 0 |
| 2 | HN: D + BF | D + O + S | 5 | 1,332.81 | 1.90 |
| 3 | HN: D + BF + S3 | D + O + T | 6 | 1,333.10 | 2.19 |
| 4 | HN: D + BF | D + O | 4 | 1,333.50 | 2.59 |
| 5 | HN: D + BF + S3 | D + O | 5 | 1,335.08 | 4.17 |
| 6 | HR: D + BF | D + O + S3 | 5 | 1,336.97 | 6.06 |
Notes
Published as part of Bröker, Koen C. A., Hansen, Rikke G., Leonard, Kathleen E., Koski, William R. & Heide-Jørgensen, Mads Peter, 2019, A comparison of image and observer based aerial surveys of narwhal, pp. 1268 in Marine Mammal Science 35 (4) on page 1268, DOI: 10.1111/mms.12586, http://zenodo.org/record/13221822
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- Is part of
- Journal article: 10.1111/mms.12586 (DOI)
- Journal article: urn:lsid:plazi.org:pub:FFAEE07B945BFFAF175CFFE25E25FFC1 (LSID)
- Journal article: http://zenodo.org/record/13221822 (URL)
- Journal article: http://publication.plazi.org/id/FFAEE07B945BFFAF175CFFE25E25FFC1 (URL)