Table 9.
Estimated fuel use intensity (FUI) and carbon footprint (CF).
| Vessel type | VL | Time at sea | Landings | yFC | yGHG | dFC | FUI | CF | |
|---|---|---|---|---|---|---|---|---|---|
| [days/year] | [t/year] | [kg/boat/year] | [l × 1000 fuel/year] | [t CO2/year] | [l fuel/boat/day] | [l fuel/t fish] | [kg CO2/t fish] | ||
| OTB | VL1218 | 157,280 | 25,272 | 28,280 | 98,125 (35.3%) | 259,049 | 624 (494–824) | 3,883 (3,073–5,128) | 10,250 (8,114–13,538) |
| VL1824 | 91,806 | 24,210 | 46,412 | 98,801 (35.6%) | 260,835 | 1,076 (896–1,285) | 4,081 (3,398–4,872) | 10,774 (8,972–12,862) | |
| VL2440 | 30,770 | 9,599 | 54,905 | 49,229 (17.7%) | 129,965 | 1,600 (1,368–2,184) | 5,129 (4,384–5,499) | 13,539 (11,575–14,518) | |
| 279,856 | 59,081 | 37,156 | 246,155 (88.7%) | 649,849 | 880 (721–1,038) | 4,085 (3,778–4,391) | 10,784 (9,974–11,593) | ||
| PTM | VL1218 | 4,857 | 7,950 | 288,079 | 2,533 (0.9%) | 6,687 | 521 (432–655) | 319 (264–400) | 841 (697–1,057) |
| VL1824 | 6,178 | 13,656 | 389,043 | 5,024 (1.8%) | 13,263 | 813 (701–940) | 368 (317–425) | 971 (838–1,123) | |
| VL2440 | 4,426 | 13,937 | 554,193 | 4,970 (1.8%) | 13,121 | 1,123 (990–1,448) | 357 (314–378) | 941 (830–998) | |
| 15,461 | 35,543 | 404,603 | 12,527 (4.5%) | 33,071 | 810 (698–923) | 349 (330–369) | 922 (871–973) | ||
| TBB | VL1218 | 1,740 | 355 | 35,908 | 1,345 (0.5%) | 3,551 | 773 (575–1,091) | 3,789 (2,819–5,348) | 10,004 (7,443–14,118) |
| VL1824 | 3,678 | 1,117 | 53,451 | 5,617 (2.0%) | 14,830 | 1,527 (1,212–1,902) | 5,029 (3,991–6,262) | 13,276 (10,535–16,532) | |
| VL2440 | 4,764 | 2,587 | 95,573 | 11,948 (4.3%) | 31,543 | 2,508 (2,056–3,693) | 4,618 (3,787–5,028) | 12,193 (9,998–13,273) | |
| 10,182 | 4,059 | 70,161 | 18,911 (6.8%) | 49,924 | 1,857 (1,525–2,189) | 4,625 (4,239–5,012) | 12,210 (11,190–13,230) | ||
| Total | VL1240 | 305,499 | 98,683 | 56,852 | 277,592 | 732,843 | 909 (737–1,080) | 2,895 (2,696–3,095) | 7,643 (7,116–8,170) |
Annual fuel consumption (yFC) and GHG emission (yGHG), fuel use intensity (FUI, litres of fuel per ton of landed fish), and carbon footprint (CF, kg of CO2-eq per ton of landed fish) provided for three major trawl fleets of the Mediterranean: single boat bottom otter trawler (OTB), midwater pair trawler (PTM), and Rapido beam trawler (TBB). For midwater pair trawl (PTM), landings refer to the catch sum of anchovies and sardine, while for single boat bottom otter trawl (OTB) and Rapido beam trawl (TBB) to the overall catch (e.g., all landed species). Information on days at sea and landings are elaborated on complementary data obtained from the Scientific Fisheries Dependent Information (FDI) database. Vessel length segment (VL) is based on LOA (VL1218: vessel between 12 and 18 m; VL1824: vessel between 18 and 24 m; VL2440: vessel between 24 and 40 m). See Table 3 for details of the parameters and metrics.
Note: for dFC, FUI, and CF the figures represent the weighted mean and 95% Confidence Interval (in parenthesis). The weighted average accounts for the relative contribution, or weight, of the fishing days in each vessel length segment (VL).