Table I.
Regions, specific locations, geographical coordinates, trawl dates and durations (min.) from bottom trawl deployments in Trondheimsfjorden in the period 2006–2021
| Region | Specific location | Trawl date | Geographic coordinates | Trawl duration (min.) | Total P. periphylla volume (L) | Total P. periphylla abundance (n) | |
|---|---|---|---|---|---|---|---|
| Outer fjord | Stjørnfjorden | 29 August 2018 | N63°43.850’ | E09°56.150’ | 15 | 7.5 | 17 |
| 21 September 2020 | N63°43.850’ | E09°56.150’ | 10 | 17.7 | 40 | ||
| Trollet | 29 August 2019 | N63°29.939’ | E10°13.288’ | 10 | 4 | 9 | |
| 23 September 2019 | N63°29.939’ | E10°13.288’ | 10 | 18.1 | 41 | ||
| 27 August 2020 | N63°29.939’ | E10°13.288’ | 5 | 215.5 | 487 | ||
| Røberg | 12 April 2007 | N63°28.88’ | E09°59.50’ | 10 | 0.4 | 1 | |
| Middle fjord | Tautra | 19 September 2018 | N63°41.312’ | E10°48.001’ | 20 | 14.2 | 32 |
| Tautra | 19 September 2018 | N63°41.312’ | E10°48.001’ | 20 | 14.2 | 32 | |
| 29 August 2019 | N63°41.376’ | E10°47.934’ | 10 | 6.2 | 14 | ||
| 23 September 2019 | N63°41.376’ | E10°47.934’ | 10 | 23.5 | 53 | ||
| Ytterøya | 16 April 2007 | N63°44.98’ | E11°06.55’ | 10 | 40 | ||
| 23 November 2010 | N63°44.98’ | E11°06.55’ | 45 | 1.8 | 4 | ||
| 11 November 2014 | N63°44.98’ | E11°06.55’ | 50 | 38.1 | 86 | ||
| 30 April 2018 | N63°44.98’ | E11°06.55’ | 30 | 69.90 | 158 | ||
| 04 July 2018 | N63°44.98’ | E11°06.55’ | 45 | 44.7 | 101 | ||
| 19 June 2019 | N63°44.98’ | E11°06.55’ | 20 | 6.6 | 15 | ||
| 15 June 2020 | N63°44.98’ | E11°06.55’ | 30 | 93.8 | 212 | ||
| 26 August 2020 | N63°44.98’ | E11°06.55’ | 14 | 15 | 34 | ||
| Inner fjord | Beistadfjorden | 19 April 2007 | N63°56.0198’ | E11°05.5610’ | 10 | 450 | |
| 25 June 2007 | N63°56.0198’ | E11°05.5610’ | 15 | 600 | |||
| 25 October 2007 | N63°56.0198’ | E11°05.5610’ | 10 | 2000 | |||
| 02 April 2008 | N63°56.0198’ | E11°05.5610’ | 30 | 9.3 | 21 | ||
| 02 April 2008 | N63°56.0198’ | E11°05.5610’ | 30 | 17.7 | 40 | ||
| 02 April 2008 | N63°56.0198’ | E11°05.5610’ | 20 | 100 | |||
| 03 April 2008 | N63°56.0198’ | E11°05.5610’ | 10 | 1000 | |||
| 25 March 2009 | N63°56.0198’ | E11°05.5610’ | 15 | 500 | |||
| 23 November 2010 | N63°56.0198’ | E11°05.5610’ | 15 | 1000 | |||
| 13 November 2012 | N63°56.0198’ | E11°05.5610’ | 10 | 600 | |||
| 05 February 2013 | N63°56.0198’ | E11°05.5610’ | 50 | 9.3 | 21 | ||
| 05 February 2013 | N63°56.0198’ | E11°05.5610’ | 10 | 600 | |||
| 09 April 2013 | N63°56.0198’ | E11°05.5610’ | 10 | 300 | |||
| 12 November 2013 | N63°56.0198’ | E11°05.5610’ | 10 | 1200 | |||
| 24 March 2014 | N63°56.0198’ | E11°05.5610’ | 10 | 1000 | |||
| 18 June 2014 | N63°56.0198’ | E11°05.5610’ | 10 | 600 | |||
| 10 November 2015 | N63°56.0198’ | E11°05.5610’ | 20 | 440 | |||
| 29 August 2019 | N63°56.0198’ | E11°05.5610’ | 10 | 62 | 140 | ||
| 27 August 2020 | N63°56.0198’ | E11°05.5610’ | 5 | 310.6 | 702 | ||
| Verrasundet | 24 October 2006 | N63°51.163’ | E10°44.006’ | 40 | 225.70 | 510 | |
| 25 October 2006 | N63°51.163’ | E10°44.006’ | 40 | 230.1 | 520 | ||
| 18 April 2007 | N63°51.163’ | E10°44.006’ | 10 | 750 | |||
| 24 October 2007 | N63°51.163’ | E10°44.006’ | 25 | 2000 | |||
| 01 April 2008 | N63°51.163’ | E10°44.006’ | 40 | 6000 | |||
| 25 March 2009 | N63°51.163’ | E10°44.006’ | 10 | 20 | |||
| 28 March 2011 | N63°51.163’ | E10°44.006’ | 10 | 800 | |||
| 10 April 2013 | N63°51.163’ | E10°44.006’ | 10 | 100 | |||
| 25 March 2014 | N63°51.163’ | E10°44.006’ | 20 | 1500 | |||
| 18 June 2014 | N63°51.163’ | E10°44.006’ | 10 | 700 | |||
| 11 November 2015 | N63°51.163’ | E10°44.006’ | 20 | 550 | |||
| 28 August 2019 | N63°51.163’ | E10°44.006’ | 10 | 110.6 | 250 | ||
| 26 August 2020 | N63°51.163’ | E10°44.006’ | 10 | 865.1 | 1955 | ||
| Verrabotten | 25 October 2006 | N63°49.106’ | E10°38.281’ | 46 | 79.70 | 180 | |
| 17 April 2007 | N63°49.106’ | E10°38.281’ | 51 | 3000 | |||
| 23 October 2007 | N63°49.106’ | E10°38.281’ | 20 | 1240 | |||
| 01 April 2008 | N63°49.106’ | E10°38.281’ | 41 | 520 | |||
| 28 March 2011 | N63°49.106’ | E10°38.281’ | 10 | 300 | |||
| 10 April 2013 | N63°49.106’ | E10°38.281’ | 10 | 200 | |||
| 15 November 2013 | N63°49.106’ | E10°38.281’ | 10 | 800 | |||
| 26 March 2014 | N63°49.106’ | E10°38.281’ | 10 | 2500 | |||
| 18 June 2014 | N63°49.106’ | E10°38.281’ | 10 | 3500 | |||
| 12 November 2015 | N63°49.106’ | E10°38.281’ | 20 | 850 | |||
| 26 August 2020 | N63°49.106’ | E10°38.281’ | 5 | 471.7 | 1066 | ||
| 29 September 2021 | N63°49.106’ | E10°38.281’ | 7 | 497.8 | 1125 | ||
Total Periphylla periphylla volume (L−1) and abundance (n) are provided.