Sistema di osservazione delle risorse alieutiche per la gestione della pesca in Adriatico

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Lino Scognamiglio
6 anni fa
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1 Sistema di osservazione delle risorse alieutiche per la gestione della pesca in Adriatico Mauro Marini Consiglio Nazionale delle Ricerche Istituto di Scienze Marine-UOS di Ancona

2 The coastal area reflects the peculiar oceanographic and morphological features of the Adriatic Sea. Two different types of coasts can be evidenced: north and central western coasts mostly sandy and muddy GSA17 south-western and eastern coasts mostly rocky GSA18 seagrass coralligenous

semi-enclosed basin with a surface of around

currents flow counterclockwise from the Strait of

strait along the Italian coast 7,800 km of

islands, most along the Adriatic's eastern coast

collecting a third of the freshwater flowing into

3 semi-enclosed basin with a surface of around 140,000 km 2 max depth 1,200 m prevailing currents flow counterclockwise from the Strait of Otranto, along the eastern coast and back to the strait along the Italian coast 7,800 km of coastline Depht m contains more than 1,300 islands, most along the Adriatic's eastern coast especially in Croatia (1,246) dilution basin, collecting a third of the freshwater flowing into the Mediterranean surface temperature ranges from 27 C in summer to 7 C in winter

The characteristics of the coastal areas

small-scale fisheries (target species and

9 Commercial fishing carried out by all gears

small pelagic and tunas fisheries (AdriaMed WG

vessels av. GT = 1.9 ALBANIA 306 vessels av.

8 Dynamic sector Characteristics vary from one

communities, reflecting their traditions In

6 The characteristics of the coastal areas strongly influence the activities of small-scale fisheries (target species and fishing gears) SLOVENIA 151 vessels av. GT = 2.5 CROATIA 3,360 vessels av. GT = 2.4 ITALY 2,351 vessels av. GT = 1.9 Commercial fishing carried out by all gears excluding trawlers, purse seiners targeting small pelagic and tunas fisheries (AdriaMed WG on Small-scale fisheries) Ancona MONTENEGRO 70 vessels av. GT = 1.9 ALBANIA 306 vessels av. GT = 2.8 Dynamic sector Characteristics vary from one location to another Strongly linked to local communities, reflecting their traditions In the Adriatic Sea small-scale vessels use a wide number of gears on a seasonal basis following the eco-ethology of the main target species

7 Adults aggregate close to Croatian waters and juveniles mainly concentrate in the Italian side Juveniles targeted by gillnetters in Italy & adults targeted with trammel nets in Croatia (Western coast of Istria) SLOVENIA Juv Adults CROATIA ITALY

longliners in Croatia Juv Adults Abundance of C. lucerna (October 2005) Demography of C.

8 Juveniles mainly concentrate in the Italian side and adults mostly aggregate in the Croatian waters Abundant by-catch (retained and discarded) for gillnetters in Italy & target species for bottom longliners in Croatia Juv Adults Abundance of C. lucerna (October 2005) Demography of C. lucerna caught with rapido trawl (October 2005) Juvenile caught with gillnet in Italy Adult caught with longlines in Croatia

14 16 18 Sistema di osservazione delle risorse alieutiche per la gestione

transects 1518 nautical miles 43 43 41 41 Biomass density (t/nm 2 ) 100 80 60

sardine Year 2013 0 1976 1979 1982 1985 1988 1991 1994 1997 2000 2003 2006

9 Sistema di osservazione delle risorse alieutiche per la gestione della pesca in Adriatico 38 pelagic hauls 96 CTD stations Ancona 39 transects 1518 nautical miles Biomass density (t/nm 2 ) Historical trends in North-Western Adriatic Sea anchovy sardine Year Anchovy Biomass: 297,824 t Sardine Biomass: 272,923 t Sampled Area: 7,286 nm 2

11 05-27 May August April May April April 14 May April 2015

12 ELECTRO MECHANICAL TOWING CABLE 800m Partially acquired from CNR- ISMAR on RITMARE funds Electric winch with wireless control Bottom unit (JB) Buoy LED Lamps Camera SLEDGE Security system Buoy release Laser Scale CTD SeaBird

13 Adriatic Sea Fishery and Oceanography Observing System (FOOS)

15 Grazie per l attenzione

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