Table 2. Distribution of Scaup in 22 subareas of the Odra River Estuary in 2002–2014 during the non-breeding period (October–April).
N—number of counts, %FO—frequency of occurrence during a given number of counts in the subarea, D—mean density (mean number of individuals per km2), Mean—mean number of individuals, Min.—minimum number of individuals, Max.—maximum number of individuals (see S4 Table).
| Subarea | N | Mean | Min. | Max. | %FO | D |
|---|---|---|---|---|---|---|
| Miroszewo (MI) | 35 | 5 842 | 0 | 27 000 | 85.7 | 286.4 |
| Krzecki Wyskok (KW) | 28 | 6 017 | 0 | 60 400 | 78.6 | 103.9 |
| Skoszewska Cove (SKC) | 30 | 5 758 | 0 | 37 800 | 80.0 | 344.8 |
| Sułomino (SU) | 29 | 3 293 | 0 | 42 600 | 75.9 | 115.0 |
| Northern Lake Dąbie (DLN) | 28 | 2 460 | 0 | 10 000 | 92.9 | 128.8 |
| Roztoka (RO) | 32 | 1 694 | 0 | 16 000 | 81.3 | 58.2 |
| Czarnocin (CZ) | 29 | 1 234 | 0 | 1 950 | 62.1 | 50.4 |
| Brzózki (BR) | 35 | 1 021 | 0 | 6 507 | 60.0 | 85.44 |
| Trzebież (TR) | 37 | 739 | 0 | 6 150 | 73.0 | 66.9 |
| Central Lake Dąbie (DLC) | 26 | 668 | 0 | 5 504 | 65.4 | 22.6 |
| Refulat (RE) | 29 | 100 | 0 | 2 000 | 27.6 | 4.3 |
| Main Lagoon (ML) | 28 | 93 | 0 | 1 500 | 39.3 | 0.6 |
| Southern Lake Dąbie (DLS) | 26 | 45 | 0 | 1 000 | 19.2 | 5.8 |
| Dziwna (DZ) | 31 | 68 | 0 | 1 000 | 25.8 | 5.4 |
| Kamień Lagoon (KL) | 30 | 69 | 0 | 700 | 46.7 | 2.3 |
| Nowowarpieńska Cove (NWC) | 33 | 57 | 0 | 700 | 30.3 | 1.0 |
| Lake Nowowarpieńskie (NWL) | 33 | 55 | 0 | 700 | 33.3 | 8.6 |
| Lake Wicko (WL) | 29 | 24 | 0 | 500 | 20.7 | 2.2 |
| Odra River (OR) | 30 | 11 | 0 | 250 | 33.3 | 1.2 |
| Lake Wrzosowo (LW) | 30 | 4 | 0 | 80 | 6.7 | 0.7 |
| Świna River (SW) | 29 | 2 | 0 | 40 | 17.2 | 0.2 |
| Cicha Cove (CC) | 30 | 0 | 0 | 0 | 0 | 0 |