Aquatic Environment and Biodiversity Annual Review 2012

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AE&B Review: Protected species: Sea lions influenced by year, the number of days into the fishery (males leave the rookeries soon after mating whereas females remain with the pups), and time of day (Smith and Baird 2005). Figure 3.1: Distribution of trawl fishing effort and observed NZ sea lion captures, 2002-03 to 2010-11 (http://data.dragonfly.co.nz/psc/). Fishing effort is mapped into 0.2-degree cells, with the colour of each cell being related to the amount of effort. Observed fishing events are indicated by black dots, and observed captures are indicated by red dots. Fishing is only shown if the effort could be assigned a latitude and longitude, and if there were three or more vessels fishing within a cell. In this case, 96.0% of the effort is shown. 27
AE&B Review: Protected species: Sea lions Table 3.4a: Effort, observed and estimated NZ sea lion captures in trawl fisheries by fishing year in the New Zealand EEZ (http://data.dragonfly.co.nz/psc/). For each fishing year, the table gives the the total number of tows; the observer coverage (the percentage of tows that were observed); the number of observed captures (both dead and alive); the capture rate (captures per hundred tows); the estimation method used (model, ratio or both combined); the mean number of estimated total captures (with 95% confidence interval); the mean number of estimated total interactions (with 95% confidence interval), and the stike rate (interactions per hundred tows). For more information on the methods used to prepare the data, see Thompson et al. (2012). Fishing year Fishing effort Observed captures 28 Estimated captures Estimated interations Estimatedstrike rate All effort % obs Number Rate Method Mean 95% c.i. Mean 95% c.i. Mean 95% c.i. Trawl fisheries 1995–96 10 081 10 16 1.5 Both 148 85–242 148 85–243 1.5 0.8–2.4 1996–97 10 941 15 28 1.7 Both 155 104–221 155 102–225 1.4 0.9–2.1 1997–98 9 964 14 14 1.0 Both 76 47–119 76 45–121 0.8 0.5–1.2 1998–99 10 551 16 6 0.4 Both 33 20–49 33 19–50 0.3 0.2–0.5 1999–00 9 043 22 28 1.4 Both 88 63–129 89 59–130 1.0 0.7–1.4 2000–01 8 910 40 46 1.3 Both 61 52–72 83 59–111 0.9 0.7–1.2 2001–02 9 945 19 23 1.2 Both 64 46–88 94 61–139 0.9 0.6–1.4 2002–03 8 308 19 11 0.7 Both 34 22–48 62 37–97 0.7 0.4–1.2 2003–04 10 033 23 21 0.9 Both 61 43–85 214 120–376 2.1 1.2–3.7 2004–05 11 109 23 14 0.5 Both 53 36–77 181 94–325 1.6 0.8–2.9 2005–06 9 316 21 14 0.7 Both 52 35–75 174 86–334 1.9 0.9–3.6 2006–07 6 728 24 15 0.9 Both 47 32–66 118 59–235 1.8 0.9–3.5 2007–08 6 545 33 8 0.4 Both 29 18–42 118 35–418 1.8 0.5–6.4 2008–09 6 677 27 3 0.2 Both 22 12–36 103 25–383 1.5 0.4–5.7 2009–10 5 541 34 15 0.8 Both 46 32–66 141 51–439 2.5 0.9–7.9 2010–11 6 389 31 6 0.3 Both 29 17–43 81 26–259 1.3 0.4–4.1 Auckland Islands squid 1995–96 4 467 12 13 2.4 Model 131 69–226 131 67–224 2.9 1.6–5.0 1996–97 3 716 19 28 3.9 Model 142 91–208 142 89–210 3.8 2.6–5.5 1997–98 1 441 22 13 4.2 Model 60 33–102 60 31–104 4.2 2.5–6.9 1998–99 402 38 5 3.2 Model 14 5–27 15 5–29 3.6 2.1–5.9 1999–00 1 206 36 25 5.7 Model 69 45–107 69 42–108 5.8 4.0–8.6 2000–01 583 99 39 6.7 Model 39 39–40 61 39–87 10.4 8.6–13.1 2001–02* 1 648 34 21 3.7 Model 43 30–64 73 43–116 4.4 3.0–6.6 2002–03 1 470 29 11 2.6 Model 19 13–29 48 24–81 3.2 2.0–5.1 2003–04 2 594 30 16 2.0 Model 41 26–62 194 100–356 7.5 4.0–13.5 2004–05^ 2 706 30 9 1.1 Model 31 17–51 159 73–303 5.9 2.7–11.1 2005–06 2 462 28 9 1.3 Model 28 15–45 149 62–308 6.0 2.7–12.5 2006–07 1 320 41 7 1.3 Model 16 9–27 87 29–201 6.6 2.3–14.8 2007–08 1 265 46 5 0.9 Model 12 6–21 101 19–396 8.0 1.6–30.9 2008–09 1 925 40 2 0.3 Model 8 3–17 89 12–365 4.6 0.7–18.4 2009–10 1 190 25 3 1.0 Model 13 5–27 107 18–402 9.0 1.7–33.6 2010–11 1 586 34 0 – Model 4 0–11 56 4–233 3.5 0.4–14.9 * SLEDs introduced. ^ SLEDs standardised and in widespread use.
Page 1 and 2: Aquatic Environment and Biodiversit
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Area (1000 sq.km) Area (1000 sq.km)
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7.3.5. Current research AEBAR 2012:
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MPI Research (current) NZ Research
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11.1.2. Defining biodiversity AEBAR
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12. Appendices AEBAR 2012: Appendic
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ISBN: 978-0-478-40503-3 (print) ISB
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