Report on Eel Stock and Fishery in Sweden, 2003

Report on Eel Stock and Fishery in Sweden, 2003

APPENDIX II. EEL STOCK AND FISHERIES IN 2003 BY COUNTRY Section Page 1 EEL STOCK AND FISHERY IN SWEDEN IN 2003 ............................................................................................ 50 1.1 Data............................................................................................................................................................... 50 1.2 Management.................................................................................................................................................. 57 2 EEL STOCK AND FISHERY IN DENMARK IN 2003......................................................................................... 58 2.1 Data............................................................................................................................................................... 58 2.2 Management.................................................................................................................................................. 61 3 EEL STOCK AND FISHERY IN IRELAND IN 2003 ........................................................................................... 62 3.1 Data............................................................................................................................................................... 62 3.2 Management.................................................................................................................................................. 70 4 EEL STOCK AND FISHERY IN THE UNITED KINGDOM AND NORTHERN IRELAND............................. 72 4.1 Data............................................................................................................................................................... 72 4.2 Conclusions................................................................................................................................................... 77 4.3 Recruitment, stock and fishery trends in Northern Ireland ........................................................................... 77 4.4 Management.................................................................................................................................................. 84 5 EEL STOCK AND FISHERY IN GERMANY IN 2003......................................................................................... 88 5.1 Data............................................................................................................................................................... 88 5.2 Management................................................................................................................................................ 102 6 EEL STOCK AND FISHERY IN THE NETHERLANDS IN 2003 ..................................................................... 103 6.1 Data............................................................................................................................................................. 103 6.2 Management................................................................................................................................................ 110 7 EEL STOCK AND FISHERY IN BELGIUM IN 2003......................................................................................... 112 7.1 Data............................................................................................................................................................. 112 7.2 Management................................................................................................................................................ 115 8 EEL STOCK AND FISHERY IN FRANCE IN 2003 ........................................................................................... 119 8.1 National level (Thomas Changeux, Gérard Castelnaud, Cédric Briand) .................................................... 120 8.2 Rhine-Meuse Basin district (Vincent Vauclin) ........................................................................................... 128 8.3 Artois-Picardie District (Gilles Euzenat, Françoise Fournel, Jean-Louis Fagard, Cédric Briand).............. 133 8.4 Seine-Normandy district (Cédric Briand, Sarah Gimet, Marie-Noëlle De Casamajor) .............................. 135 8.5 Brittany district (Cédric Briand, Thibault Vigneron).................................................................................. 141 8.6 Loire District (Aurore Baisez) .................................................................................................................... 155 8.7 Garonne district (Gérard Castelnaud, Gilles Adam, Laurent Beaulaton).................................................... 171 8.8 Adour District (Marie Noëlle De Casamajor)............................................................................................. 183 8.9 Rhône Mediterranean Corsica (Thomas Changeux, Nicolas Auphan, Jean-Yves Menella, Raymonde Lecomte) ..................................................................................................................................................... 195 8.10 Conclusion (Cédric Briand, Thomas Changeux, Gérard Castelnaud, Aurore Baisez, Marie Noëlle de Casamajor).................................................................................................................................................. 203 9 EEL STOCK AND FISHERY IN ITALY IN 2003............................................................................................... 205 9.1 Data............................................................................................................................................................. 205 9.2 Management................................................................................................................................................ 208 @# i 1 Eel stock and fishery in Sweden in 2003 Country: Sweden Authors: Håkan Wickström1 and Håkan Westerberg2 Author address: 1National Board of Fisheries, Institute of Freshwater Research, SE-178 93 DROTTNINGHOLM, Sweden, [email protected] 2National Board of Fisheries, Box 423, SE-401 26 GÖTEBORG, Sweden, [email protected] Reporting date and last reported year: September 2003, most data through 2002 1.1 Data 1.1.1 Trend in recruitment 1.1.1.1 Monitoring methodology, life stage, gear type The amount (kg and sometimes numbers) of young eels (0+ and older) ascending several rivers along the Swedish coast (Rivers Göta Älv, Viskan, Lagan, Mörrumsån, Motala Ström and Dalälven). Viskan is the only river where “glass eels” are totally dominating. In the remaining rivers there is a mix of age classes, from 0+, 1+, 2+ and 3+ up to about 10+ in age. An additional recruitment series on glass eels comes from an experimental trawl fishery in the intake channel for cooling water at the Ringhals Nuclear Power Plant. The Institute of Coastal Research within the Swedish National Board of Fisheries is since a number of years analysing the age and relative year-class strength of the recruits from Rivers Mörrumsån and Motala Ström. 50 1.1.1.2 Recruitment monitoring results Recruitment data series from Sweden (all in kg, 2003 may be incomplete) 193 3879. 106.5 N/A 8 0 Yea Göta Dalälve Motal Viska Laga Mörrumså Rönne Kävlingeå 193 4775. 36.0 N/A r Älv n a n n n å n 9 0 Ström 194 1894. 684.0 N/A 190 530.0 0 0 0 194 2846. 321.0 N/A 190 5100. 1 0 1 0 194 427.0 14.0 454.0 N/A 190 340.0 2 2 194 1848. 283.0 1248. N/A 190 858.0 3 0 0 3 194 2342. 773.0 1090. N/A 190 552.0 4 0 0 4 194 2636. 406.0 1143. N/A 190 8700. 5 0 0 5 0 194 2452. 280.0 766.5 29.7 190 2000. 6 0 6 0 194 675.0 272.5 440.8 5.8 190 275.0 7 7 194 1702. 120.0 494.7 6.0 190 N/A 8 0 8 194 1711. 43.0 603.6 39.4 190 N/A 9 0 9 195 2947. 304.5 419.9 93.5 191 N/A 0 0 0 195 1744. 210.0 2713.0 281.8 1.0 191 5728. 1 0 1 0 195 3662. 324.0 1543.5 379.1 9.1 191 6529. 2 0 2 0 195 5071. 241.5 2698.0 802.4 70.0 191 20.0 3 0 3 195 1031. 508.5 1030.0 511.3 2.7 191 2828. 4 0 4 0 195 2732. 550.0 1871.0 506.9 42.6 191 N/A 5 0 5 195 1622. 215.0 429.0 501.6 14.1 191 N/A 6 0 6 195 1915. 161.5 826.0 336.1 46.8 191 N/A 45.0 7 0 7 195 1675. 336.7 172.0 497.2 73.2 191 N/A 4.5 8 0 8 195 1745. 612.6 1837.0 910.5 80.0 191 1465. N/A 9 0 9 0 196 1605. 289.0 799.0 552.4 29.0 93.0 192 800.0 N/A 0 0 0 196 269.0 303.0 706.0 314.8 665.5 143.7 192 1555. N/A 1 1 0 196 873.0 289.0 870.0 261.9 534.8 113.0 192 455.0 N/A 2 2 196 1469. 445.4 581.0 298.1 241.2 32.5 192 1732. N/A 3 0 3 0 196 622.0 158.0 181.6 27.5 177.8 34.7 192 4551. N/A 4 4 0 196 746.0 276.4 500.0 28.0 292.3 87.1 192 5463. 331.3 N/A 5 5 0 196 1232. 157.5 1423.0 216.5 196.3 48.5 192 3893. 357.8 49.0 6 0 6 0 196 493.0 331.8 283.0 24.4 353.6 6.6 192 4796. 581.1 445.0 7 7 0 196 849.0 265.5 184.0 74.4 334.8 398.0 192 47.0 211.9 0.0 8 8 196 1595. 333.7 135.0 117.1 276.8 85.7 192 756.0 4.5 0.0 9 0 9 197 1046. 149.8 2.0 24.7 80.4 29.8 193 5753. 268.0 147.0 0 0 0 0 197 842.0 242.0 1.0 12.0 45.3 141.1 53.3 193 2103. 316.0 N/A 1 1 0 197 810.0 87.6 51.0 88.0 106.2 139.9 249.0 193 7238. 408.0 N/A 2 2 0 197 1179. 159.7 46.0 177.0 107.1 375.0 282.3 193 6333. 303.5 N/A 3 0 3 0 197 631.0 49.5 58.5 13.0 33.6 65.4 120.7 193 6338. 236.0 N/A 4 4 0 197 1230. 148.7 224.0 99.0 78.4 93.3 206.7 193 1336. 53.5 N/A 5 0 5 0 197 798.0 44.0 24.0 501.0 20.2 147.2 17.1 193 2537. 24.5 N/A 6 6 0 197 256.0 176.4 353.0 850.0 26.4 89.6 32.1 193 8711. 0.5 N/A 7 7 0 51 197 873.0 35.1 266.0 532.6 75.8 168.4 10.8 8 197 190.0 34.3 112.0 505.2 165.9 61.4 56.1 9 198 906.0 71.2 7.0 72.5 226.0 36.5 165.7 0 198 40.0 6.8 31.0 513.1 78.0 72.8 49.2 1 198 882.0

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