Table 2 Captures 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 capture was made (all ‘Ceuta’ in this case) |
3. | year | year during which capture was made |
4. | site | site at which capture was made |
5. | nest | unique identifier of nest at which capture was made (unique within year and within site). If capture was made at a brood originating from an unknown nest, the identifier is negative (e.g., ‘−2’). |
6. | ID | a concatenation of year, site, and nest to make a unique nest identifier across sites and years |
7. | ring | alpha-numeric code of metal ring assigned to captured individual |
8. | code | color-ring combination assigned to captured individual. 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. |
9. | age | age of captured individual (‘J’ = juvenile (chicks and first-years), ‘A’ = adult (second-years and older)) |
10. | field_sex | sex of individual determined in the field based on ornamentation and other clues (e.g., time of capture, parental care, etc.), where ‘F’ = female, ‘M’ = males, and ‘J’ = unknown sexed juvenile |
11. | mol_sex | sex of individual determined in the lab with the P2/P8 and Calex-31 markers (for our PCR conditions see ref. 17), where ‘F’ = female, ‘M’ = males, ‘U’ = insufficient molecular evidence (e.g., markers failed), and ‘NA’ = individual not molecularly sex-typed. Note: all birds initially captured in years after 2013 have not yet been molecularly sex-typed |
12. | sex | sex of captured individual (‘F’ = female, ‘M’ = males, ‘J’ = juvenile of unknown sex) |
13. | easting | UTM easting of capture |
14. | northing | UTM northing of capture |
15. | utm | UTM zone of capture |
16. | date | date capture 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”)’) |
17. | time | time capture was made (24 h format, e.g. ‘1633’) |
18. | parents | parents attending captured individual (if age = ‘J’) 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) |
19. | weight | weight in grams of captured individual |
20. | bill | length in millimeters of upper mandible of captured individual. Measured as the distance between the tip of the forehead feathering at the base of the upper bill, along the ridge of the culmen, and the tip of the bill (also known as the “exposed culmen” measurement; sensu page 8 of ref. 35 |
21. | left_tarsus | length in millimeters of left tarsus of captured individual. Measured as the distance between the notch at the end of the lateral condyle of the tibiotarsus on the backside of the leg, to the last tarsal scute on the front of the leg at the base of the foot (also known as the “outside tarsus” or “diagonal tarsus” measurement; sensu page 11 of ref. 35 |
22. | right_tarsus | same as ‘left_tarsus’ measurement above but for right leg of captured individual |
23. | left_wing | length in millimeters of left wing of captured individual. Measured as the distance from the carpal joint (the bend of the wing) to the longest primary feather whilst flattening the wing and straightening the primaries (also known as the “maximum flat” or “flattened and straightened” measurement; sensu page 6 of ref. 35 |
24. | right_wing | same as ‘left_wing’ measurement above but for right wing of captured individual |
25. | blood | indication if blood from captured individual was collected (‘1’) or not (‘0’) |
26. | moult | primary molt score of captured individual. Scored as the stage of the moult and the number of feathers at that stage. See ref. 36 for more details. |
27. | fat | fat score of captured individual, scored as the amount of visible fat in the furcular region or tracheal pit. See ref. 36 for more details. |
28. | lice | indication if feather lice from captured individual were collected (‘1’) or not (‘0’) |
29. | faecal | indication if faeces from captured individual was collected (‘1’) or not (‘0’) |
30. | photo | indication if a photo of captured individual was taken (‘1’) or not (‘0’) |
31. | observer | initials of observer making capture |
32. | comments | miscellaneous comments pertinent to capture event |
