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Downloadable Guides
Longline Skippers Guidebooks
Pole and Line Skippers Guidebook
Purse Seine Observer Guides
Purse Seine Skippers Guidebooks
Online Guidebooks
Online Longline Skippers Guidebook
Online Purse Seine Observers Guide
Online Purse Seine Skippers Guide
Additional Resources
Species Identification Guides
Other Resources
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Online Purse Seine Observer Training Guidebook
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Chapter 3
Gallery 3.4: Testing Tuna Identification Quiz
Observer Training Guide
Observer Table of Contents
Chapter 1
Introduction
About ISSF
Gallery 1.1
ISSF Activities
Gallery 1.2
ISSF ProActive Vessel Register
Gallery 1.3
ISSF Participating Companies
Conservation Measures
The Role of Observers in Sustainable Fishing
Chapter 2
Introduction
Vessel Identification And Characteristics
Gallery 2.1: Vessel Components and Identification
Gallery 2.2: Vessel Electronics
Gallery 2.3: Vessel Monitoring System
Purse Seine Operations
Gallery 2.4: Purse Seine Net and Setting
Gallery 2.5: Purse Seine Fishing Stages
Fish Aggregating Devices
FADS and Bycatch
FAD Construction
Gallery 2.6: FADs
Fishing Activity
Gallery 2.7: Observer Documentation
Safety At Sea
Gallery 2.8: Safety Equipment
Chapter 3
Introduction
Tuna Species
Gallery 3.1: Tuna Species
Small Bigeye and Yellowfin
Gallery 3.2: Bigeye and Yellowfin Tuna
Damaged, Frozen, or Non-Ideal Conditions
Gallery 3.3: Identifying Damaged or Frozen Fish
Gallery 3.4: Testing Tuna Identification Quiz
Conclusion
Chapter 4
Introduction
Bony Fishes
Gallery 4.1: Bony Fish Identification
Sharks and Rays
Commonly Encountered Sharks and Rays
Gallery 4.2: Shark and Ray Identification
Shark and Ray Handling and Release
Gallery 4.3: Shark and Ray Handling and Release
Sea Turtles
Commonly Encountered Sea Turtles
Gallery 4.4: Sea Turtle Identification
Sea Turtle Handling and Release
Gallery 4.5: Sea Turtle Handling and Release
Reducing Bycatch
Movie 4.1: ISSF Shark Research: Testing Chum Lure
Final Notes
Chapter 5
Introduction
Sampling Strategy
Fish Length Measurements
Gallery 5.1: Fish Length Sampling
Biological Sampling
Example: Catch Estimation
Tagged Animals
Gallery 5.2: Scientific Tag Types
Final Notes
Chapter 6
Introduction
International Organizations and Instruments
Inter-American Tropical Tuna Commission
Western And Central Pacific Fisheries Commission
International Commission for the Conservation of Atlantic Tunas
Indian Ocean Tuna Commission
Further Notes on Data Reporting and Compliance
Chapter 7
Introduction
Recording and Reporting
At The End Of The Trip
In Conclusion
Feedback Form
Copyright, etc.
Top: Yellowfin Tuna Bottom: Bigeye Tuna (Photo: David Itano)
Top: Bigeye Tuna Bottom: Yellowfin Tuna (Photo: David Itano)
Top: Bigeye Tuna Bottom: Yellowfin Tuna (Photo: David Itano)
From top, the first three are “False Tunas” (see Chapter 4). Bottom three are: Yellowfin tuna, Bigeye tuna, and Skipjack. (Photo: David Itano)
Answer: best estimates are: YFT: close regular line pattern, long body, caudal notch BET: large head and eye, irregular line pattern YFT: Thick, short pectoral fin, possible regular marking pattern BET: long pectoral fin, no shar…
Yellowfin Tuna (Photo: David Itano)
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