Target Catch rate. From a total effort of 53,930 hooks set 2, 821 fish of target species from 12 taxa were caught. Yellow fin tuna Tunnus albacares was the most abundant species (n = 1,522), followed by Blue shark Prionace glauca (n = 476). These two species constituted 71% of all fish catch and tunas and sharks combined constituted 93% of all species caught (Table 9). There was no significant difference between the catch per unit effort (CPUE) of the main target species under treatments 1 (2.0 m) and 2 (5.5 m) (Xxxx Xxxxxxx U Test P>0.05, Table 10; see also Figures 5 and 6, Table 9). Table 9: Total capture and CPUE (fish/1000 hooks) of target species by treatment over the six experimental cruises conducted by ATF Brazil in 2010. Number caught Total CPUE Species 2 m 5.5 m Total 2 m 5.5 m Tunas Thunnus albacares 786 736 1522 30.03 27.51 Thunnus alalunga 21 28 49 0.80 1.05 Thunnus obesus 2 0 2 0.08 0.00 Other teleosts Xiphias gladius 52 57 109 1.99 2.13 Lepidocybium flavobrunneum 32 11 43 1.22 0.41 Ruffestus pretiosus 10 10 20 0.38 0.37 Coryphaena hippurus 6 16 22 0.23 0.60 Others 17 3 20 0.65 0.11 Sharks Prionace glauca 234 242 476 8.94 9.04 Carcharhinus spp 82 116 198 3.17 4.15 Sphyrna zygaena 84 109 193 3.21 4.07 Isurus oxyrinchus 55 56 111 2.01 2.09 Sphyrna lewini 21 33 54 0.80 1.23 Others 6 3 9 0.23 0.11 Figure 5: Mean CPUE (fish/1,000 hooks) of tunas and swordfish caught during treatment 1 (2.0 m) and 2 (5.5 m).
