Longline Fishing

ISBN-13: 9780852382004 / Angielski / Miękka / 1996 / 170 str.

Asmund Bjordal; Svein Lolkkeborg; Svein Lokkeborg

Opis

Despite the fact hat longline fishing is a traditional and widespread fish capture method, few books describe in detail the principles and applications of longline fishing gear.

Longlinning has been written to provide all the information needed on the many different aspects of longline fishing. It deals the history of the technique, the basic capture principles and how they relate to fish behaviour, important target species, and provides technical descriptions of gear, vessels ad equipment and the different modes of operating longlines. A comparison with other methods of fishing is also included.

The book will prove of great interest to wide readership, ranging from professional longline fishermen to fisheries managers and students.

Spis treści

Preface.

The Authors.

1. Introduction.

1.1 Basic Definitions.

1.2 Longline Fishing from Historical Perspective.

2. Principles of Longline Catching Process.

2.1 Passive and Active Fishing Gears.

2.2 Feeding Behaviour and Chemical Sensing: The Basis for Fishing with Baited Gears.

2.3 How Fish Locate Baited Longlines.

2.4 The Hooking Process.

3. Gear Construction, Operation and Vessels.

3.1 The Gear: Mainline, Snoods, Materials, Hooks, Hook Spacing and Bait.

3.2 Methods of Settling Longlines.

3.3 The Longline Fishing Cycle and Modes of Operation.

3.4 Mechanised Longlinning.

3.5 Longline Vessels.

3.6 Electronic Instrumentation.

3.7 Safety Aspects of Longlinning.

3.8 Handling of the Catch.

3.9 The Longline Fisherman.

4. Main Target Species and the Relative Importance of Longlining.

4.1 Tuna in the Atlantic, Indian and Pacific Oceans.

4.2 Groundfish in the North Atlantic.

4.3 Groundfish in the North Eastern Pacific.

4.4 Hake in the Atlantic.

5. Gear Parameters and Catching Efficiency.

5.1 Research Methods.

5.2 Natural Bait.

5.3 Artificial Bait.

5.4 The Hook.

5.5 The Snood and Snood Attachment.

5.6 Hook Spacing.

5.7 The Mainline.

5.8 Bait Loss and Other Factors Affecting the Catching Efficiency of Longlines.

6. Selective Properties of Longline Gear.

6.1 The Importance of gear Selectivity.

6.2 Species Selection.

6.3 Size Selection.

7. Longlinning Compared with other Fishing Methods.

7.1 The Relative Catching Efficiency of Longlinning.

7.2 Responsible Fishing.

7.3 Effects on Fish Scotks and Fisheries Employment.

References and Selected Literature.

Glossary.

Common and scientific names of some important longline target species.

Index.