Capture of other birds in trawl fisheries


Observed captures of other birds in trawl fisheries Observed captures
Fishing effort and observations in trawl fisheries Effort, and observer coverage
Estimated captures of other birds in trawl fisheries
Estimated captures
Fishing effort and observed captures of other birds by month
Monthly coverage and captures

The "other birds" group includes all birds other than albatrosses, sooty shearwater, and white-chinned petrel. Estimates of total captures in trawl and longline fisheries are available for the "other birds" group.

Between 2002–03 and 2010–11, there were 264 observed captures of other birds in trawl fisheries.

The risk from New Zealand commercial fisheries to New Zealand seabird populations was assessed by comparing annual potential fishing-related fatalities to an index of population productivity (Richard and Abraham 2013b). The risk from commercial fisheries to the New Zealand populations of other birds ranged from negligible to very high.


Map of fishing effort and observed captures, October 2003 to September 2011, 96.0% of effort displayed

Map of fishing effort and observed captures, 2002–03 to 2010–11. 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.

Table of effort and captures by fishing year. For each fishing year, the table gives the total number of tows; the number of observed tows; 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; the mean number of estimated total captures (with 95% confidence interval), and the percentage of tows included in the estimate. Due to Ministry for Primary Industries anonymity requirements, fishing effort is only shown if there were three or more vessels fishing in that year. For more information on the methods used to prepare the data, see Abraham and Thompson (2011b).
Fishing effort Observed captures Estimated captures
All tows Observed tows % observed Number Rate Mean 95% c.i. % tows included
2002–03 130 344 6 834 5.2 20 0.29 653 280–1 307 100.0
2003–04 121 498 6 546 5.4 17 0.26 661 279–1 336 100.0
2004–05 120 585 7 709 6.4 40 0.52 953 447–1 943 100.0
2005–06 110 234 6 553 5.9 22 0.34 618 285–1 210 100.0
2006–07 103 529 7 928 7.7 20 0.25 531 235–1 063 100.0
2007–08 89 537 9 046 10.1 17 0.19 406 178–811 100.0
2008–09 87 589 9 804 11.2 54 0.55 513 284–923 100.0
2009–10 92 886 9 006 9.7 31 0.34 620 305–1 196 100.0
2010–11 86 074 7 445 8.6 43 0.58 596 306–1 141 100.0
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Table of observed captures. The table lists the captures of each species that were recorded by observers. For each capture event, the table gives the date; the best identifcation made of the species; the number of captures; the number recorded by the observer as alive; the number whose identity was confirmed by necropsy; the number whose identification was imputed (based on necropsies of the same observed species); the target species of the fishing; and the area where the capture occurred.
Date Species or species group Captures Alive Necropsied Imputed Capture method Target species Area
03 Oct 2002 Cape petrel 1 1 1 Hoki Fiordland
02 Nov 2002 Northern giant petrel 1 1 White warehou Chatham Rise
09 Nov 2002 Common diving petrel 1 1 Scampi Auckland Islands
13 Nov 2002 Cape petrel 1 1 Paravane Hoki Chatham Rise
13 Nov 2002 Northern giant petrel 1 1 Hoki East Coast South Island
25 Nov 2002 Cape petrel 1 1 Paravane Hoki Fiordland
29 Nov 2002 Cape petrel 1 1 Paravane Hoki Stewart Snares Shelf
21 May 2003 Grey-backed storm petrel 1 1 1 Arrow squid Auckland Islands
21 May 2003 White-headed petrel 1 1 Arrow squid Auckland Islands
02 Jul 2003 Cape petrel 1 1 1 Hoki Chatham Rise
23 Jul 2003 Westland petrel 1 1 Hoki West Coast South Island
26 Jul 2003 Large seabirds 1 Hoki West Coast South Island
28 Jul 2003 Fairy prion 1 1 1 Hoki West Coast South Island
29 Jul 2003 Seabirds 1 Hoki West Coast South Island
10 Aug 2003 Fairy prion 1 1 Hoki West Coast South Island
13 Aug 2003 Westland petrel 3 3 3 Hoki West Coast South Island
19 Aug 2003 Cape petrel 1 1 Hoki West Coast South Island
24 Aug 2003 Cape petrel 1 1 Hoki West Coast South Island
04 Oct 2003 Grey petrel 1 1 Hoki Stewart Snares Shelf
03 Nov 2003 Cape petrel 1 1 Scampi Auckland Islands
29 Feb 2004 Common diving petrel 1 1 Arrow squid Auckland Islands
01 Mar 2004 Antarctic prion 6 6 1 Arrow squid Auckland Islands
11 Mar 2004 Grey-backed storm petrel 1 1 Arrow squid Auckland Islands
21 Apr 2004 Common diving petrel 1 1 1 Arrow squid Stewart Snares Shelf
09 May 2004 Cape petrels 1 1 Hoki East Coast South Island
10 Jul 2004 Grey petrel 1 1 Orange roughy Chatham Rise
01 Aug 2004 Snares Cape petrel 1 Hoki West Coast South Island
04 Aug 2004 Cape petrels 1 Hoki West Coast South Island
23 Aug 2004 Westland petrel 1 1 Hoki West Coast South Island
09 Sep 2004 Westland petrel 1 1 Hoki West Coast South Island
06 Nov 2004 Cape petrels 9 9 Orange roughy East Coast South Island
29 Jan 2005 Giant petrels 1 1 Arrow squid Stewart Snares Shelf
27 Feb 2005 Common diving petrel 3 3 3 Arrow squid Auckland Islands
20 Mar 2005 Grey-backed storm petrel 1 1 1 Arrow squid Auckland Islands
26 Apr 2005 Large seabirds 1 Jack mackerel Taranaki
05 Jun 2005 Fairy prion 1 1 Jack mackerel Taranaki
06 Jun 2005 Cape petrels 1 1 Jack mackerel Taranaki
11 Jun 2005 Cape petrel 1 1 1 Orange roughy Chatham Rise
11 Jun 2005 Common diving petrel 1 1 Orange roughy Chatham Rise
11 Jun 2005 Grey petrel 1 1 Orange roughy Chatham Rise
16 Jun 2005 Cape petrel 1 1 1 Orange roughy Chatham Rise
18 Jun 2005 Fairy prion 2 2 Jack mackerel Taranaki
19 Jun 2005 Cape petrel 1 1 1 Orange roughy Chatham Rise
19 Jun 2005 Cape petrel 2 1 2 Orange roughy Chatham Rise
22 Jun 2005 Fairy prion 1 1 1 Hoki East Coast South Island
21 Jul 2005 Cape petrel 1 1 1 Jack mackerel West Coast South Island
11 Aug 2005 Cape petrel 1 1 Hoki West Coast South Island
12 Aug 2005 Cape petrel 1 1 Hoki Cook Strait
12 Aug 2005 Cape petrel 2 2 2 Hoki West Coast South Island
20 Aug 2005 Grey petrel 1 1 Southern blue whiting Subantarctic
25 Aug 2005 Cape petrel 1 1 Hoki West Coast South Island
29 Aug 2005 Common diving petrel 1 1 Hoki Fiordland
30 Aug 2005 Common diving petrel 2 2 Hoki Fiordland
01 Sep 2005 Cape petrel 1 1 1 Southern blue whiting Subantarctic
07 Sep 2005 Cape petrel 1 1 1 Hake West Coast South Island
12 Sep 2005 Cape petrel 1 1 Hoki Cook Strait
09 Oct 2005 Cape petrel 1 1 1 Hoki Chatham Rise
11 Oct 2005 Cape petrels 1 1 Mitigation device Oreos East Coast South Island
27 Oct 2005 Flesh-footed shearwater 8 8 Scampi Bay of Plenty
07 Dec 2005 New Zealand white-faced storm petrel 1 1 Smooth oreo Chatham Rise
03 Mar 2006 Giant petrels 1 1 Arrow squid Stewart Snares Shelf
08 Mar 2006 Prions 1 1 Barracouta Stewart Snares Shelf
09 Mar 2006 Black-bellied storm petrel 1 1 Arrow squid Stewart Snares Shelf
23 May 2006 Grey-backed storm petrel 1 1 Hoki Stewart Snares Shelf
25 May 2006 Cape petrel 1 1 1 Hoki Stewart Snares Shelf
31 May 2006 Fulmars, petrels, prions and shearwaters 1 Scampi Bay of Plenty
23 Jul 2006 Large seabirds 1 Tarakihi East Coast North Island
17 Aug 2006 Grey petrel 1 1 Southern blue whiting Subantarctic
27 Aug 2006 Grey petrel 1 1 Southern blue whiting Subantarctic
31 Aug 2006 Westland petrel 1 1 Paravane Hake West Coast South Island
08 Sep 2006 Cape petrels 1 1 Hoki West Coast South Island
14 Oct 2006 Flesh-footed shearwater 2 2 Scampi Bay of Plenty
14 Oct 2006 Flesh-footed shearwater 2 2 Scampi Bay of Plenty
19 Oct 2006 Fulmars, petrels, prions and shearwaters 1 Scampi Bay of Plenty
21 Oct 2006 Flesh-footed shearwater 1 1 Scampi Bay of Plenty
02 Feb 2007 Northern giant petrel 1 1 Scampi Auckland Islands
08 Apr 2007 Flesh-footed shearwater 1 1 Net John dory Northland and Hauraki
10 Apr 2007 Black petrel 1 1 Net John dory Northland and Hauraki
10 Apr 2007 Small seabirds 1 1 Net Snapper Northland and Hauraki
25 Apr 2007 Cape petrel 1 1 Net Arrow squid Stewart Snares Shelf
10 Jul 2007 Grey petrel 1 1 Unknown Arrow squid East Coast South Island
10 Jul 2007 Common diving petrel 1 1 Other Jack mackerel West Coast South Island
29 Jul 2007 Cape petrel 1 1 1 Net Hoki West Coast South Island
12 Aug 2007 Northern giant petrel 1 1 Warp or door Hoki West Coast South Island
17 Aug 2007 Grey petrel 2 2 Net Southern blue whiting Subantarctic
29 Aug 2007 Northern giant petrel 1 1 Net Hoki West Coast South Island
31 Aug 2007 Cape petrel 1 1 Net Hoki West Coast South Island
24 Sep 2007 Large seabirds 1 1 Warp or door Southern blue whiting Subantarctic
20 Oct 2007 Cape petrel 1 1 Warp or door Barracouta West Coast South Island
25 Oct 2007 Grey petrel 1 1 Other Oreos Subantarctic
16 Nov 2007 New Zealand white-faced storm petrel 1 1 Unknown Orange roughy Chatham Rise
02 Dec 2007 Flesh-footed shearwater 1 1 Net Scampi Bay of Plenty
01 Jan 2008 Small seabirds 1 1 Net Ling Subantarctic
10 Feb 2008 Mid-sized petrels and shearwaters 1 1 Net Arrow squid Stewart Snares Shelf
14 Mar 2008 Flesh-footed shearwater 1 1 Net Scampi Bay of Plenty
24 Mar 2008 Black petrel 1 1 Net Scampi Bay of Plenty
24 Mar 2008 Flesh-footed shearwater 2 2 Tangled Scampi Bay of Plenty
18 Apr 2008 Seabirds 1 Other Arrow squid Stewart Snares Shelf
19 Apr 2008 Flesh-footed shearwater 1 1 Net Hoki East Coast South Island
24 May 2008 Northern giant petrel 1 1 Paravane Orange roughy Chatham Rise
12 Aug 2008 Grey petrel 1 1 Net Southern blue whiting Subantarctic
19 Aug 2008 Prions 1 1 Net Hake West Coast South Island
23 Aug 2008 Small seabirds 1 1 Net Hoki West Coast South Island
26 Aug 2008 Westland petrel 1 1 Net Barracouta West Coast South Island
05 Oct 2008 Cape petrel 1 1 Warp or door Orange roughy Chatham Rise
08 Oct 2008 Fairy prion 1 1 1 Unknown Jack mackerel Taranaki
26 Oct 2008 Black-bellied storm petrel 1 1 Net Hoki Stewart Snares Shelf
03 Dec 2008 Flesh-footed shearwater 1 1 Net Scampi Bay of Plenty
11 Dec 2008 Flesh-footed shearwater 1 1 Net Scampi Bay of Plenty
27 Dec 2008 Fairy prion 1 1 Net Jack mackerel Taranaki
12 Jan 2009 Gulls 1 Warp or door Lemon sole Stewart Snares Shelf
12 Jan 2009 Petrels, prions, and shearwaters 1 1 Net Red cod East Coast South Island
13 Jan 2009 Fulmars, petrels, prions and shearwaters 1 1 Net Flats East Coast South Island
17 Jan 2009 Gulls 1 Warp or door Lemon sole Stewart Snares Shelf
02 Feb 2009 Spotted shag 1 1 Net Flats East Coast South Island
13 Feb 2009 Spotted shag 31 31 Net Flats East Coast South Island
21 Feb 2009 Petrels, prions, and shearwaters 1 Unknown Arrow squid Stewart Snares Shelf
27 Feb 2009 Antarctic prion 1 1 Net Arrow squid Auckland Islands
10 Apr 2009 Petrels, prions, and shearwaters 1 Net Hoki East Coast South Island
15 May 2009 Flesh-footed shearwater 1 1 Mitigation device Gemfish Bay of Plenty
17 May 2009 Common diving petrel 1 1 Net Orange roughy Chatham Rise
10 Jul 2009 Westland petrel 1 1 Net Hoki West Coast South Island
19 Jul 2009 Cape petrel 1 1 Net Hoki Cook Strait
20 Jul 2009 Cape petrel 1 1 Net Hoki Cook Strait
23 Jul 2009 Westland petrel 1 1 Net Jack mackerel West Coast South Island
28 Jul 2009 Cape petrel 1 1 Warp or door Hoki West Coast South Island
28 Aug 2009 Cape petrel 1 1 Net Scampi Chatham Rise
11 Sep 2009 Cape petrel 1 1 Net Scampi Chatham Rise
20 Jan 2010 Fulmar prion 3 3 3 Other Jack mackerel Taranaki
09 Feb 2010 Petrels, prions, and shearwaters 1 1 Net Arrow squid Stewart Snares Shelf
13 Feb 2010 Petrels, prions, and shearwaters 1 1 Net Arrow squid Stewart Snares Shelf
13 Feb 2010 Petrels, prions, and shearwaters 2 2 Net Arrow squid Stewart Snares Shelf
14 Feb 2010 Petrels, prions, and shearwaters 1 1 Net Arrow squid Stewart Snares Shelf
04 Mar 2010 Giant petrels 1 1 Net Arrow squid Stewart Snares Shelf
26 Apr 2010 Flesh-footed shearwater 1 1 Net Scampi Bay of Plenty
22 May 2010 Cape petrels 1 Mitigation device Hoki East Coast South Island
11 Jun 2010 Cape petrel 1 1 1 Other Orange roughy Chatham Rise
14 Jun 2010 Cape petrel 1 1 Paravane Orange roughy Chatham Rise
15 Jun 2010 Cape petrel 1 1 Paravane Orange roughy Chatham Rise
01 Jul 2010 Cape petrel 1 1 Net Hoki Cook Strait
03 Jul 2010 Cape petrel 1 1 1 Net Hoki Cook Strait
04 Jul 2010 Cape petrel 1 1 Net Hoki Cook Strait
11 Jul 2010 Westland petrel 1 1 Net Hoki Cook Strait
14 Jul 2010 Cape petrel 1 1 Net Hoki Cook Strait
22 Jul 2010 Westland petrel 1 1 Net Hoki West Coast South Island
15 Aug 2010 Cape petrel 2 2 Paravane Hake West Coast South Island
03 Sep 2010 Grey petrel 1 1 Net Southern blue whiting Subantarctic
03 Sep 2010 Grey petrel 2 1 1 Net Southern blue whiting Subantarctic
04 Sep 2010 Grey petrel 2 2 Net Southern blue whiting Subantarctic
04 Sep 2010 Grey petrel 1 1 Net Southern blue whiting Subantarctic
04 Sep 2010 Grey petrel 1 1 Net Southern blue whiting Subantarctic
08 Sep 2010 Grey petrel 1 1 Net Southern blue whiting Subantarctic
17 Sep 2010 Grey petrel 1 1 Net Southern blue whiting Subantarctic
23 Oct 2010 Fairy prion 1 1 Net Ling Stewart Snares Shelf
23 Oct 2010 Southern black-backed gull 1 Warp or door Yellow-belly flounder Taranaki
24 Oct 2010 Flesh-footed shearwater 15 15 Net Scampi Bay of Plenty
29 Oct 2010 Short-tailed shearwater 1 1 Net White warehou Fiordland
19 Nov 2010 Westland petrel 1 1 Net Hoki Chatham Rise
05 Mar 2011 Prions 1 1 Net Arrow squid Auckland Islands
21 Mar 2011 Procellaria petrels 1 1 Net Arrow squid Stewart Snares Shelf
23 Apr 2011 Grey petrel 1 1 1 Other Hoki Subantarctic
04 May 2011 Fulmars, petrels, prions and shearwaters 1 1 Net Arrow squid Auckland Islands
04 May 2011 Common diving petrel 1 1 Other Hoki Stewart Snares Shelf
09 May 2011 Seabirds 1 1 Net Arrow squid Auckland Islands
03 Jun 2011 Fulmars, petrels, prions and shearwaters 1 1 Other Silver warehou Stewart Snares Shelf
11 Jun 2011 Storm petrels 1 1 Other Black oreo Subantarctic
13 Aug 2011 Grey petrel 1 1 Other Southern blue whiting Subantarctic
15 Aug 2011 Grey petrel 3 3 Net Southern blue whiting Subantarctic
20 Aug 2011 Cape petrels 1 1 Other Hoki Cook Strait
20 Aug 2011 Petrels, prions, and shearwaters 2 1 Net, unknown Southern blue whiting Subantarctic
22 Aug 2011 Grey-backed storm petrel 1 1 Other Southern blue whiting Subantarctic
22 Aug 2011 Grey petrel 1 1 Unknown Southern blue whiting Subantarctic
25 Aug 2011 Cape petrels 1 1 Other Hoki Cook Strait
25 Aug 2011 Grey petrel 1 1 Net Southern blue whiting Subantarctic
29 Aug 2011 Grey petrel 1 1 Net Southern blue whiting Subantarctic
30 Aug 2011 Storm petrels 1 1 Unknown Southern blue whiting Subantarctic
04 Sep 2011 Storm petrels 1 1 Other Southern blue whiting Subantarctic
08 Sep 2011 Common diving petrel 1 1 Other Hoki Cook Strait
14 Sep 2011 Giant petrels 1 1 Other Hoki West Coast South Island
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