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1304 C. Ravier and J.-M. Fromentin

Table 1. Geographical classification and main characteristics of the time-series of trap catches. Left, cluster resulting from the
classification on the geographic distance matrix (in km) between the 54 traps. Columns represent the time-series index, the country
(‘‘Por’’=Portugal, ‘‘Spa’’=Spain, ‘‘Mor’’=Morocco, ‘‘Tun’’=Tunisia, ‘‘Sic’’=Sicily, ‘‘Ita’’=continental Italy, ‘‘Sar’’=Sardinia),
the trap name, the period used in the analyses, the number of actual observations (n), the median values, the coefficient of variation
(C.V.), and the percentage of variance associated with the first component of Eigen Vector Filtering.

Geographic distance index

9000 2000 1000 0 No. Place Trap name Period n Median C.V. % First axis
EVF
1 Por Sul do Cabo 1896–1917 21 1404 0.81
0.75 56.4
2 Por Senohra da Rocha 1897–1919 23 1560 0.58 46.6
0.65 53.2
3 Por Olhos de Agua 1896–1919 24 1352 0.80 50.8
0.72 36.6
4 Por Fort Novo 1896–1920 25 1435 0.99 32.4
0.87 68.3
5 Por Ramalhete 1896–1930 35 1169 0.84 81.2
35.0
6 Por Cabo Santa Maria 1896–1933 38 1730 0.64 82.8
0.93 55.0
7 Por Livramento 1876–1933 58 5709 1.00 75.8
32.7
8 Por Barril 1867–1933 67 7606 0.55
0.62 44.5
9 Por Medo das Casas 1797–1817 21 8309 0.61 79.7
0.60 30.9
" 1852–1933 82 0.57 45.5
0.58 65.7
10 Por Abobora 1885–1933 49 3258 0.49 45.1
0.63 56.9
11 Por Sul da Ponta 1902–1926 25 4739 0.53 70.0
0.58 51.4
12 Por Torre de Barra 1897–1917 21 1404 0.58 30.1
0.92 32.5
13 Spa Reine Regente 1914–1940 26 6432 32.3
0.65
14 Spa Isla Cristina 1929–1960 32 7330 0.81 74.7
0.79 35.8
15 Spa Las Torres 1902–1923 21 2967 0.73 33.8
0.96 70.9
16 Spa Arroyo Hondo 1914–1934 20 7073 66.0
0.59
17 Spa Sancti Petri 1917–1960 42 9948 71.6
0.85 63.4
18 Spa Torre Atalaja 1914–1934 20 4317 62.1
0.84 78.8
19 Spa Barbate 1910–1960 46 16090 69.3
0.64 31.0
20 Spa Zahara 1910–1936 27 5102 0.69 48.2
0.72 39.8
21 Spa Tarifa 1927–1960 34 2686 57.5
0.60 44.5
22 Mor Punta Negra 1936–1960 24 3845 0.70 31.2
0.68 40.8
23 Mor Aguas de Ceuta 1940–1960 21 849 1.07 24.7
35.3
24 Mor Principe 1940–1960 21 384 0.77 44.5
0.57 71.0
25 Tun Sidi Daoud 1863–1960 93 5071 0.62 31.9
0.54 29.3
26 Tun Ras El Ahmar 1905–1941 35 1689 1.33 44.1
0.92 54.0
27 Tun Monastir 1894–1926 32 1628 0.80 59.6
0.90 45.0
28 Tun Conigliera 1897–1929 32 1894 0.79 45.0
1.01 73.6
29 Tun Bordj Khadidja 1903–1929 23 1017 40.0
0.87
30 Sic Formica 1634–1813 175 2173 38.8
0.74 75.9
" 1878–1960 78 55.0
0.72 47.6
31 Sic Favignana 1634–1813 168 1958 0.63 55.6
0.65 57.8
" 1878–1960 80 59.6

32 Sic San Giuliano 1711–1806 83 715

" 1885–1914 28

33 Sic Osinelli 1904–1929 26 890

34 Sic San Cusumano 1903–1960 58 600

35 Sic Bonagia 1657–1809 141 961

" 1879–1934 56

36 Sic Cofano 1738–1764 25 495

37 Sic Secco 1874–1933 73 500

38 Sic Scopello 1909–1933 25 369

39 Sic San Giorgio 1880–1917 38 374

" 1924–1960 37

40 Sic San Elia 1909–1929 19 425

41 Sic Solanto 1909–1929 19 596

42 Sic San Nicola 1909–1929 19 395

43 Sic Trabia 1909–1929 19 570

44 Sic Castellamare 1909–1931 21 205

45 Sic Magazzinazzi 1892–1933 42 528

46 Sic Oliveri 1904–1960 57 558

47 Sic Tonno 1885–1960 74 757

48 Sic Marzamemi 1875–1931 57 1706

49 Ita Pizzo 1876–1932 52 1595

50 Sar Saline 1829–1848 20 2011

" 1868–1960 92

51 Sar Flummentorgiu 1829–1848 20 1316

" 1868–1914 42

52 Sar Porto Paglia 1825–1960 129 1826

53 Sar Porto Scuso 1825–1960 135 3155

54 Sar Isola Piana 1828–1960 135 2387