Table 3 Broods data of snowy plovers breeding in Bahía de Ceuta, Mexico, between 2006 and 2016.
From: CeutaOPEN, individual-based field observations of breeding snowy plovers Charadrius nivosus
Column | Data name | Description of data |
|---|---|---|
1. | species | species of plover (all snowy plover ‘SNPL’ in this case) |
2. | population | population at which brood was observed (all ‘Ceuta’ in this case) |
3. | year | year during which brood was observed |
4. | site | site at which brood was observed |
5. | brood | unique identifier of brood (unique within year and within site). Broods originating from known nests retain the nest identifier found in the Nests table, whereas broods hatching from unknown nests have a negative identifier (e.g., ‘−2’) |
6. | ID | a concatenation of year, site, and nest to make a unique brood identifier across sites and years |
7. | easting | UTM easting of brood observation |
8. | northing | UTM northing of brood observation |
9. | utm | UTM zone of brood observation |
10. | date | date brood observation was made (stored in the internal ‘Date’ format of R and represents the number of days since January 1, 1970, the ‘Unix epoch’. Converted easily in R using ‘as.Date(date, origin = “1970-01-01”)’) |
11. | time | time brood observation was made (24 h format, e.g. ‘1633’) |
12. | distance | estimated distance in meters between brood and observer |
13. | degree | estimated bearing of brood relative to observer (i.e., the number of degrees in the angle measured in a clockwise direction from the north line to the line joining the observer to the brood) |
14. | parents | parents attending brood at time of observation (‘0’ = no parent present; ‘1’ = one parent (not identified whether male or female); ‘2’ = female only (‘2+’ when female identified, whilst male’s identity was uncertain); ‘3’ = male only (‘3+’ when male identified, whilst female’s identity was uncertain, i.e., opposite of ‘2+’); ‘4’ = both present) |
15. | male | color-ring combination of male observed tending brood. The scheme can be noted as XX.XX|XX.XX where X indicates a possible position for a color (or metal) ring, the full-stop marks the position of the knee-joint and the pipe divides the left and right leg. Thus the readout is “left above. left below | right above. right below”. See page 9 of ref. 25 for more details |
16. | female | color-ring combination of female observed tending brood. The scheme can be noted as XX.XX|XX.XX where X indicates a possible position for a color (or metal) ring, the full-stop marks the position of the knee-joint and the pipe divides the left and right leg. Thus the readout is “left above. left below | right above. right below”. See page 9 of ref. 25 for more details |
17. | chicks | number of chicks observed in brood. Because of temporary or permanent brood adoption, number of chicks can be larger than initial brood size at subsequent observations |
18. | chick_codes | color ring combinations of all chicks observed (individuals seperated by a comma). The scheme can be noted as XX.XX|XX.XX where X indicates a possible position for a color (or metal) ring, the full stop marks the position of the knee-joint and the pipe divides the left and right leg. Thus the readout is “left above. left below | right above. right below”. See page 9 of ref. 25 for more details. |
19. | brood_photo | indication if a photo of the brood was taken (‘1’) or not (‘0’) |
20. | observer | initials of observer making brood observation |
21. | comments | miscellaneous comments pertinent to brood’s observation |
