Autopsy Report Seabirds killed and returned from the 20 0 8 -0 9 - PowerPoint PPT Presentation

Autopsy Report – Seabirds killed and returned from the 20 0 8 -0 9 fishing year David Thom pson Contract INT20 0 7/ 0 2

Sum m ary… • 38 5 specim ens returned, 28 taxa • 1 blue penguin gaffed • 75 trips, 62 vessels • 60 % of specim ens XSH, XWC & XWM • 79% of specim ens 6 spp. (XBM, XGP & XSA) • 33 spotted shag, 32 from 1 trip • 9 black petrel • 4 m arked birds (1 XBP, 3 XYP)

Species Month Total 10 11 12 1 2 3 4 5 6 7 8 9 Black petrel 9 1 8 Buller’s albatross 31 4 21 3 3 Grey petrel 1 6 2 1 10 Salvin’s albatross 27 1 2 11 1 2 10 Sooty shearwater 94 4 4 1 34 28 21 2 Spotted shag 33 White-capped albatross 67 4 6 14 17 14 9 3 White-chinned petrel 1 32 28 9 3 2 75 Yellow-eyed penguin 4 4

Birds returned… • 71% m ale, 23% fem ale • 95% XSH & 8 5% XWC m ale • 67% XGP fem ale • 92% adult

70 60 50 40 Percent Grey petrel Sooty shearwater White-chinned petrel 30 20 10 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

80 70 60 50 P ercen t Buller's albatross 40 Salvin's albatross White-capped albatross 30 20 10 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30 25 20 Frequency 15 10 5 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Birds Returned by Trip

Snapper Shark S. D. Tuna C. Tuna Scam pi Other Squid Other Hoki Species 1 8 Black petrel 15 3 2 1 10 Buller’s albatross 5 1 4 Grey petrel 2 3 1 10 11 Salvin’s albatross 15 51 28 Sooty shearwater 33 Spotted shag 2 1 4 43 17 White-capped albatross 2 1 1 1 65 5 White-chinned petrel 4 Yellow-eyed penguin 7 2 3 2 8 43 4 29 1 % Total

Likely cause of death (%) Longline – Hook/ Snood Trawl Species Group Bill Wings Legs Body N/ O Warp Net Set N Deck Total 50 16 5 10 19 18 8 2 Albatross 62 33 0 33 27 8 8 22 0 0 Non- 38 67 10 0 67 73 12 78 10 0 10 0 Albatross XWM: 31 warp, 33 net

Stom ach contents, albatrosses (%) Snapper D. Tuna C. Tuna Scam pi Other Squid Other Hoki Stom ach Contents No stom ach 5 20 36 23 14 Em pty 65 8 0 10 0 27 28 18 Natural? 5 2 9 Bait 10 Bat + Natural Bait + 5 Discards Discards 10 36 45 91 69 Discards + 2 Nat No. Birds 20 5 0 1 11 4 7 11 39

Stom ach contents, non-albatrosses (%) Snapper D. Tuna C. Tuna Scam pi Other Squid Other Hoki Stom ach Contents No stom ach 25 13 3 4 Em pty 14 38 13 4 7 48 33 33 Natural? 50 15 25 32 16 67 51 Sludge 14 5 Bait 43 23 38 Bait + 25 8 Natural Bait + Discards Discards 29 15 13 16 34 8 No. Birds 7 4 13 8 19 120 3 72

Identifications… • 66% correct • 9% incorrect (12 of 67 XWM as XSY) • 10 XSA and 10 XWM as XAL • 16% as ‘generic’ grouping, inc 32 XPP and 19 of 75 XWC • 4% no ID