Table 2 Frequency of occurrence of prey items in stomachs of kittiwake nestlings and adults
2001 | 2002 | 2004 | 2006 | 2001–2006 | |||||
|---|---|---|---|---|---|---|---|---|---|
N chicks (total N = 16) | N adults (total N = 3) | N chicks (total N = 13) | N adults (total N = 1) | N chicks (total N = 26) | N adults (total N = 6) | N chicks (total N = 19) | N chicks (total N = 74) | Proportion (%) | |
Gadidae | 12 | 2 | 7 | 1 | 21 | 5 | 0 | 40 | 54 |
Whiting Merlangius merlangus | 8 | 1 | 5 | 1 | 14 | 5 | 0 | 27 | 37 |
Poor cod Trisopterus minutus | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 2 | 3 |
Gadoid indet. | 6 | 1 | 2 | 0 | 8 | 0 | 0 | 16 | 22 |
Ammodytidae | 1 | 3 | 6 | 0 | 3 | 1 | 6 | 16 | 22 |
Lesser sandeel Ammodytes marinus | 0 | 1 | 1 | 0 | 0 | 1 | 3 | 4 | 5 |
Great sandeel Hyperoplus sp. | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 |
Sandeel indet. | 1 | 2 | 4 | 0 | 3 | 1 | 3 | 11 | 15 |
Clupeidae | 7 | 1 | 1 | 0 | 3 | 2 | 5 | 16 | 22 |
Herring Clupea harengus | 1 | 1 | 0 | 0 | 2 | 2 | 1 | 4 | 5 |
Sprat Sprattus sprattus | 2 | 0 | 0 | 0 | 1 | 1 | 2 | 5 | 7 |
Clupeid indet. | 6 | 0 | 1 | 0 | 1 | 0 | 2 | 10 | 14 |
Pleuronectiformes | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
Dab Limanda limanda | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
Scaldfish Arnoglossus laterna | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
Flatfish indet. | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
Anchovy Engraulis encrasicolus | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
Goby indet. (Gobiidae) | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Wrasse indet. (Labridae) | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 |
Fish indet. | 3 | 1 | 1 | 0 | 4 | 1 | 0 | 8 | 11 |
Nereidae indet. (Polychaeta) | 0 | 0 | 3 | 0 | 3 | 1 | 16 | 22 | 30 |
Coleoptera indet. (Insecta) | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 |
Brachyura indet. (Crustacea) | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 3 | 4 |