Demersal Longline. Fishing Procedures & Gear INSERT presenter name here. Trinidad longliner, 2005, FAO Fisheries Technical Paper. No.

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1 Demersal Longline Fishing Procedures & Gear INSERT presenter name here Trinidad longliner, 2005, FAO Fisheries Technical Paper. No. 482

2 Introduction Demersal longlining is global Copyright Michael Pidwirny

3 Objectives Define demersal longlining & describe 1 potential impact Describe 3 components of demersal longline gear List 2 types of specialized equipment you may encounter Demonstrate ability to complete the Gear Description form

4 What is demersal longlining? Hook & line gear uses bait to attract fish in on or near bottom Usually on continental shelf or slope Schoolmeester & Baker 2009

5 What is demersal longlining? Hook & line gear uses bait to attract fish on or near bottom Usually on continental shelf & slope Primary targets: gadiiformes, sharks Cohen et al. 1990; FAO via

6 What is demersal longlining? Hook & line gear uses bait to attract fish on or near bottom Usually on continental shelf & slope Primary targets: gadoids, sharks Bait = fish or squid depending on target

7 What is demersal longlining? Hook & line gear uses bait to attract fish on or near bottom Usually on continental shelf & slope Primary targets: gadoids, sharks Bait = fish or squid depending on target Fishery impacts bycatch of seabirds, sharks, coral Nicolas Gasco F. Arocha Lophelia II 2009: Deepwater Coral Expedition: Reefs, Rigs, and Wrecks

8 Data collection priorities 1. Estimate effort for each gear deployment; 2. Identify every individual caught in subsample and estimate percent retained; 3. Collect biological information on target and other identified species as requested; 4. Record all sightings and interactions with marine mammals and sea turtles; 5. Record vessel and fishing gear characteristics.

9 How is gear fished? Strategies /deepreefimages.html

10 How is gear fished? Strategies Deployment (videos )

11 How is gear fished? Strategies Deployment Retrieval B. Richardson 2005 SEASWAP Andy Murch, John Bennett -

12 Gear components - overview Single line Double line

13 Gear components - groundline Monofilament longline; Polyester longline;

14 Gear components - gangion Drawing modified from Hanrahan et al Photo: K. Dietrich 2010

15 Swivels (Beverly 2009) Snap (clip;

16 Gear components - hooks

17 Gear setting devices Autobiater Autoline system Setting tube toline.htm

18 Gear components gear markers Drawing modified from Hanrahan et al. 1997

19

20 Lead sphere; B. Richardson 2005 Concrete cylinders, Chilean longliner, K. Dietrich 2010

21

22 Gear hauling devices Line hauler Groundline drum

23 Gear seabird mitigation Australia Department of Agriculture, Fisheries & Forestry Davit / tori pole Photo: Washington Sea Grant

24 Gear seabird mitigation Water cannon Streamer curtain Drawings: BirdLife International - Bycatch Mitigation Fact Sheet 12

25 Gear Description Form

26 Gear Description Form

27 Gear Description Form

28 Gear Description Form

29 Gear Description Form Questions about gear or the gear form? Practice exercise Groups of minutes to complete Gear Description Form Break 10 minutes Discuss exercise

30 Gear Description Form INSERT ANSWER SHEET [ INCOMPLETE]

31 Summary Describe the difference between demersal & semi-pelagic longlining What are the potential impacts of this fishery? Describe 3 components of demersal longline gear List 2 types of specialized equipment you may encounter on demersal longline vessels

Demersal Longline. Introduction. What is demersal longlining? Objectives 4/6/2011. Demersal longlining is global

Demersal Longline. Introduction. What is demersal longlining? Objectives 4/6/2011. Demersal longlining is global Demersal Longline Introduction Demersal longlining is global Fishing Procedures & Gear INSERT presenter name here http://www.worldwideseafoods.ca/fleet.html Trinidad longliner, 2005, FAO Fisheries Technical

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